/mandos/release : contents of plugin-runner.c at revision 203

: (revision 203)

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21 by Teddy Hogeborn * Makefile (CFLAGS): Changed to use $(WARN), $(DEBUG), $(COVERAGE) and	1	/* -- coding: utf-8 -- */
	2	/*
	3	* Mandos plugin runner - Run Mandos plugins
	4	*
24.1.102 by Björn Påhlsson changed 2007-2008 copyright notice to 2008	5	* Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
21 by Teddy Hogeborn * Makefile (CFLAGS): Changed to use $(WARN), $(DEBUG), $(COVERAGE) and	6	*
	7	* This program is free software: you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License as
	9	* published by the Free Software Foundation, either version 3 of the
	10	* License, or (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program. If not, see
	19	* <http://www.gnu.org/licenses/>.
	20	*
28 by Teddy Hogeborn * server.conf: New file.	21	* Contact the authors at <mandos@fukt.bsnet.se>.
21 by Teddy Hogeborn * Makefile (CFLAGS): Changed to use $(WARN), $(DEBUG), $(COVERAGE) and	22	*/
	23
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	24	#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
	25	asprintf() */
24.1.26 by Björn Påhlsson tally count of used symbols	26	#include <stddef.h> /* size_t, NULL */
	27	#include <stdlib.h> /* malloc(), exit(), EXIT_FAILURE,
	28	EXIT_SUCCESS, realloc() */
	29	#include <stdbool.h> /* bool, true, false */
	30	#include <stdio.h> /* perror, popen(), fileno(),
	31	fprintf(), stderr, STDOUT_FILENO */
	32	#include <sys/types.h> /* DIR, opendir(), stat(), struct
	33	stat, waitpid(), WIFEXITED(),
	34	WEXITSTATUS(), wait(), pid_t,
	35	uid_t, gid_t, getuid(), getgid(),
	36	dirfd() */
	37	#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
	38	FD_SET(), FD_ISSET(), FD_CLR */
	39	#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
	40	WEXITSTATUS() */
	41	#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	42	#include <iso646.h> /* and, or, not */
	43	#include <dirent.h> /* DIR, struct dirent, opendir(),
24.1.26 by Björn Påhlsson tally count of used symbols	44	readdir(), closedir(), dirfd() */
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	45	#include <unistd.h> /* struct stat, stat(), S_ISREG(),
24.1.26 by Björn Påhlsson tally count of used symbols	46	fcntl(), setuid(), setgid(),
	47	F_GETFD, F_SETFD, FD_CLOEXEC,
	48	access(), pipe(), fork(), close()
	49	dup2, STDOUT_FILENO, _exit(),
	50	execv(), write(), read(),
	51	close() */
	52	#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
	53	FD_CLOEXEC */
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	54	#include <string.h> /* strsep, strlen(), asprintf() */
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	55	#include <errno.h> /* errno */
24.1.26 by Björn Påhlsson tally count of used symbols	56	#include <argp.h> /* struct argp_option, struct
	57	argp_state, struct argp,
	58	argp_parse(), ARGP_ERR_UNKNOWN,
102 by Teddy Hogeborn * plugin-runner.c (process): Set "completed" and "status" as volatile.	59	ARGP_KEY_END, ARGP_KEY_ARG,
	60	error_t */
24.1.26 by Björn Påhlsson tally count of used symbols	61	#include <signal.h> /* struct sigaction, sigemptyset(),
	62	sigaddset(), sigaction(),
	63	sigprocmask(), SIG_BLOCK, SIGCHLD,
	64	SIG_UNBLOCK, kill() */
	65	#include <errno.h> /* errno, EBADF */
13 by Björn Påhlsson Added following support:	66
37 by Teddy Hogeborn Non-tested commit for merge purposes.	67	#define BUFFER_SIZE 256
24.1.69 by Björn Påhlsson added configfile as a optional argument to plugin-runner	68
	69	#define PDIR "/lib/mandos/plugins.d"
	70	#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
37 by Teddy Hogeborn Non-tested commit for merge purposes.	71
74 by Teddy Hogeborn * Makefile (PREFIX, CONFDIR): New.	72	const char *argp_program_version = "plugin-runner 1.0";
24.1.35 by Björn Påhlsson version 1.0	73	const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
24.1.35 by Björn Påhlsson version 1.0	74
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	75	typedef struct plugin{
	76	char name; / can be NULL or any plugin name */
	77	char **argv;
	78	int argc;
	79	char **environ;
	80	int envc;
	81	bool disabled;
	82
	83	/* Variables used for running processes*/
13 by Björn Påhlsson Added following support:	84	pid_t pid;
	85	int fd;
	86	char *buffer;
21 by Teddy Hogeborn * Makefile (CFLAGS): Changed to use $(WARN), $(DEBUG), $(COVERAGE) and	87	size_t buffer_size;
	88	size_t buffer_length;
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	89	bool eof;
102 by Teddy Hogeborn * plugin-runner.c (process): Set "completed" and "status" as volatile.	90	volatile bool completed;
	91	volatile int status;
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	92	struct plugin *next;
	93	} plugin;
	94
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	95	static plugin *plugin_list = NULL;
	96
24.1.90 by Björn Påhlsson fixed two bugs:	97	/* Gets an existing plugin based on name,
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	98	or if none is found, creates a new one */
	99	static plugin getplugin(char name){
	100	/* Check for exiting plugin with that name */
	101	for (plugin *p = plugin_list; p != NULL; p = p->next){
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	102	if ((p->name == name)
	103	or (p->name and name and (strcmp(p->name, name) == 0))){
	104	return p;
	105	}
	106	}
	107	/* Create a new plugin */
	108	plugin *new_plugin = malloc(sizeof(plugin));
	109	if (new_plugin == NULL){
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	110	return NULL;
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	111	}
24.1.62 by Björn Påhlsson merge + small bugfix	112	char *copy_name = NULL;
	113	if(name != NULL){
	114	copy_name = strdup(name);
98 by Teddy Hogeborn * plugin-runner.c (getplugin): Only copy "name" if not NULL. Free	115	if(copy_name == NULL){
	116	return NULL;
	117	}
24.1.54 by Björn Påhlsson plugin-runner	118	}
24.1.90 by Björn Påhlsson fixed two bugs:	119
24.1.54 by Björn Påhlsson plugin-runner	120	*new_plugin = (plugin) { .name = copy_name,
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	121	.argc = 1,
	122	.disabled = false,
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	123	.next = plugin_list };
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	124
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	125	new_plugin->argv = malloc(sizeof(char ) 2);
	126	if (new_plugin->argv == NULL){
24.1.62 by Björn Påhlsson merge + small bugfix	127	free(copy_name);
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	128	free(new_plugin);
	129	return NULL;
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	130	}
24.1.54 by Björn Påhlsson plugin-runner	131	new_plugin->argv[0] = copy_name;
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	132	new_plugin->argv[1] = NULL;
135 by Teddy Hogeborn * plugin-runner.c (add_environment): Never insert existing environment	133
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	134	new_plugin->environ = malloc(sizeof(char *));
	135	if(new_plugin->environ == NULL){
24.1.62 by Björn Påhlsson merge + small bugfix	136	free(copy_name);
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	137	free(new_plugin->argv);
	138	free(new_plugin);
	139	return NULL;
	140	}
	141	new_plugin->environ[0] = NULL;
135 by Teddy Hogeborn * plugin-runner.c (add_environment): Never insert existing environment	142
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	143	/* Append the new plugin to the list */
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	144	plugin_list = new_plugin;
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	145	return new_plugin;
	146	}
	147
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	148	/* Helper function for add_argument and add_environment */
	149	static bool add_to_char_array(const char new, char **array,
	150	int *len){
	151	/* Resize the pointed-to array to hold one more pointer */
	152	array = realloc(array, sizeof(char *)
	153	* (size_t) ((*len) + 2));
	154	/* Malloc check */
	155	if(*array == NULL){
	156	return false;
	157	}
	158	/* Make a copy of the new string */
	159	char *copy = strdup(new);
	160	if(copy == NULL){
	161	return false;
	162	}
	163	/* Insert the copy */
	164	(array)[len] = copy;
	165	(*len)++;
	166	/* Add a new terminating NULL pointer to the last element */
	167	(array)[len] = NULL;
	168	return true;
	169	}
	170
	171	/* Add to a plugin's argument vector */
	172	static bool add_argument(plugin p, const char arg){
	173	if(p == NULL){
	174	return false;
	175	}
	176	return add_to_char_array(arg, &(p->argv), &(p->argc));
	177	}
	178
	179	/* Add to a plugin's environment */
136 by Teddy Hogeborn * plugin-runner.c (add_environment): Override existing environment	180	static bool add_environment(plugin p, const char def, bool replace){
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	181	if(p == NULL){
	182	return false;
	183	}
135 by Teddy Hogeborn * plugin-runner.c (add_environment): Never insert existing environment	184	/* namelen = length of name of environment variable */
	185	size_t namelen = (size_t)(strchrnul(def, '=') - def);
	186	/* Search for this environment variable */
	187	for(char *e = p->environ; e != NULL; e++){
24.1.90 by Björn Påhlsson fixed two bugs:	188	if(strncmp(*e, def, namelen + 1) == 0){
136 by Teddy Hogeborn * plugin-runner.c (add_environment): Override existing environment	189	/* It already exists */
	190	if(replace){
24.1.90 by Björn Påhlsson fixed two bugs:	191	char new = realloc(e, strlen(def) + 1);
136 by Teddy Hogeborn * plugin-runner.c (add_environment): Override existing environment	192	if(new == NULL){
	193	return false;
	194	}
	195	*e = new;
	196	strcpy(*e, def);
	197	}
135 by Teddy Hogeborn * plugin-runner.c (add_environment): Never insert existing environment	198	return true;
	199	}
	200	}
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	201	return add_to_char_array(def, &(p->environ), &(p->envc));
	202	}
	203
32 by Teddy Hogeborn * plugins.d/plugbasedclient.c (set_cloexec_flag): New function.	204	/*
	205	* Based on the example in the GNU LibC manual chapter 13.13 "File
	206	* Descriptor Flags".
	207	* *Note File Descriptor Flags:(libc)Descriptor Flags.
	208	*/
187 by Teddy Hogeborn * debian/mandos-client.README.Debian: Document "eth0" default and how	209	static int set_cloexec_flag(int fd){
32 by Teddy Hogeborn * plugins.d/plugbasedclient.c (set_cloexec_flag): New function.	210	int ret = fcntl(fd, F_GETFD, 0);
	211	/* If reading the flags failed, return error indication now. */
	212	if(ret < 0){
	213	return ret;
	214	}
	215	/* Store modified flag word in the descriptor. */
	216	return fcntl(fd, F_SETFD, ret \| FD_CLOEXEC);
	217	}
	218
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	219
102 by Teddy Hogeborn * plugin-runner.c (process): Set "completed" and "status" as volatile.	220	/* Mark processes as completed when they exit, and save their exit
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	221	status. */
187 by Teddy Hogeborn * debian/mandos-client.README.Debian: Document "eth0" default and how	222	static void handle_sigchld(__attribute__((unused)) int sig){
24.1.65 by Björn Påhlsson * plugin-runner.c (handle_sigchld): Loop until all exited children	223	while(true){
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	224	plugin *proc = plugin_list;
24.1.65 by Björn Påhlsson * plugin-runner.c (handle_sigchld): Loop until all exited children	225	int status;
	226	pid_t pid = waitpid(-1, &status, WNOHANG);
	227	if(pid == 0){
102 by Teddy Hogeborn * plugin-runner.c (process): Set "completed" and "status" as volatile.	228	/* Only still running child processes */
24.1.65 by Björn Påhlsson * plugin-runner.c (handle_sigchld): Loop until all exited children	229	break;
	230	}
	231	if(pid == -1){
	232	if (errno != ECHILD){
	233	perror("waitpid");
	234	}
102 by Teddy Hogeborn * plugin-runner.c (process): Set "completed" and "status" as volatile.	235	/* No child processes */
	236	break;
24.1.65 by Björn Påhlsson * plugin-runner.c (handle_sigchld): Loop until all exited children	237	}
24.1.90 by Björn Påhlsson fixed two bugs:	238
102 by Teddy Hogeborn * plugin-runner.c (process): Set "completed" and "status" as volatile.	239	/* A child exited, find it in process_list */
24.1.65 by Björn Påhlsson * plugin-runner.c (handle_sigchld): Loop until all exited children	240	while(proc != NULL and proc->pid != pid){
	241	proc = proc->next;
	242	}
	243	if(proc == NULL){
	244	/* Process not found in process list */
	245	continue;
	246	}
	247	proc->status = status;
	248	proc->completed = true;
	249	}
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	250	}
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	251
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	252	/* Prints out a password to stdout */
187 by Teddy Hogeborn * debian/mandos-client.README.Debian: Document "eth0" default and how	253	static bool print_out_password(const char *buffer, size_t length){
64 by Teddy Hogeborn * mandos-client.c (print_out_password): Strip trailing '\n'.	254	ssize_t ret;
	255	for(size_t written = 0; written < length; written += (size_t)ret){
24.1.42 by Björn Påhlsson Added fallback to mandos-client	256	ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
	257	length - written));
	258	if(ret < 0){
	259	return false;
	260	}
	261	}
	262	return true;
	263	}
	264
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	265	/* Removes and free a plugin from the plugin list */
	266	static void free_plugin(plugin *plugin_node){
	267
	268	for(char *arg = plugin_node->argv; arg != NULL; arg++){
	269	free(*arg);
	270	}
	271	free(plugin_node->argv);
	272	for(char *env = plugin_node->environ; env != NULL; env++){
	273	free(*env);
	274	}
	275	free(plugin_node->environ);
	276	free(plugin_node->buffer);
	277
	278	/* Removes the plugin from the singly-linked list */
	279	if(plugin_node == plugin_list){
	280	/* First one - simple */
	281	plugin_list = plugin_list->next;
	282	} else {
	283	/* Second one or later */
	284	for(plugin *p = plugin_list; p != NULL; p = p->next){
	285	if(p->next == plugin_node){
	286	p->next = plugin_node->next;
	287	break;
	288	}
	289	}
	290	}
	291
	292	free(plugin_node);
	293	}
	294
	295	static void free_plugin_list(void){
	296	while(plugin_list != NULL){
	297	free_plugin(plugin_list);
98 by Teddy Hogeborn * plugin-runner.c (getplugin): Only copy "name" if not NULL. Free	298	}
24.1.54 by Björn Påhlsson plugin-runner	299	}
24.1.54 by Björn Påhlsson plugin-runner	300
13 by Björn Påhlsson Added following support:	301	int main(int argc, char *argv[]){
24.1.69 by Björn Påhlsson added configfile as a optional argument to plugin-runner	302	char *plugindir = NULL;
	303	char *argfile = NULL;
24.1.51 by Björn Påhlsson Added configuration files support for mandos-client	304	FILE *conffp;
24.1.5 by Björn Påhlsson plugbasedclient:	305	size_t d_name_len;
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	306	DIR *dir = NULL;
13 by Björn Påhlsson Added following support:	307	struct dirent *dirst;
13 by Björn Påhlsson Added following support:	308	struct stat st;
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	309	fd_set rfds_all;
13 by Björn Påhlsson Added following support:	310	int ret, maxfd = 0;
24.1.6 by Björn Påhlsson plugbasedclient	311	uid_t uid = 65534;
24.1.6 by Björn Påhlsson plugbasedclient	312	gid_t gid = 65534;
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	313	bool debug = false;
	314	int exitstatus = EXIT_SUCCESS;
24.1.7 by Björn Påhlsson merge	315	struct sigaction old_sigchld_action;
	316	struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
	317	.sa_flags = SA_NOCLDSTOP };
24.1.51 by Björn Påhlsson Added configuration files support for mandos-client	318	char **custom_argv = NULL;
	319	int custom_argc = 0;
	320
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	321	/* Establish a signal handler */
	322	sigemptyset(&sigchld_action.sa_mask);
	323	ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
24.1.54 by Björn Påhlsson plugin-runner	324	if(ret == -1){
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	325	perror("sigaddset");
24.1.54 by Björn Påhlsson plugin-runner	326	exitstatus = EXIT_FAILURE;
24.1.54 by Björn Påhlsson plugin-runner	327	goto fallback;
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	328	}
	329	ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
24.1.54 by Björn Påhlsson plugin-runner	330	if(ret == -1){
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	331	perror("sigaction");
98 by Teddy Hogeborn * plugin-runner.c (getplugin): Only copy "name" if not NULL. Free	332	exitstatus = EXIT_FAILURE;
24.1.54 by Björn Påhlsson plugin-runner	333	goto fallback;
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	334	}
	335
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	336	/* The options we understand. */
	337	struct argp_option options[] = {
	338	{ .name = "global-options", .key = 'g',
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	339	.arg = "OPTION[,OPTION[,...]]",
	340	.doc = "Options passed to all plugins" },
138 by Teddy Hogeborn * plugin-runner.c: Changed short option for "--global-env" to "-G",	341	{ .name = "global-env", .key = 'G',
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	342	.arg = "VAR=value",
	343	.doc = "Environment variable passed to all plugins" },
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	344	{ .name = "options-for", .key = 'o',
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	345	.arg = "PLUGIN:OPTION[,OPTION[,...]]",
	346	.doc = "Options passed only to specified plugin" },
138 by Teddy Hogeborn * plugin-runner.c: Changed short option for "--global-env" to "-G",	347	{ .name = "env-for", .key = 'E',
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	348	.arg = "PLUGIN:ENV=value",
	349	.doc = "Environment variable passed to specified plugin" },
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	350	{ .name = "disable", .key = 'd',
	351	.arg = "PLUGIN",
	352	.doc = "Disable a specific plugin", .group = 1 },
138 by Teddy Hogeborn * plugin-runner.c: Changed short option for "--global-env" to "-G",	353	{ .name = "enable", .key = 'e',
	354	.arg = "PLUGIN",
	355	.doc = "Enable a specific plugin", .group = 1 },
24.1.5 by Björn Påhlsson plugbasedclient:	356	{ .name = "plugin-dir", .key = 128,
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	357	.arg = "DIRECTORY",
	358	.doc = "Specify a different plugin directory", .group = 2 },
24.1.69 by Björn Påhlsson added configfile as a optional argument to plugin-runner	359	{ .name = "config-file", .key = 129,
	360	.arg = "FILE",
	361	.doc = "Specify a different configuration file", .group = 2 },
	362	{ .name = "userid", .key = 130,
	363	.arg = "ID", .flags = 0,
	364	.doc = "User ID the plugins will run as", .group = 3 },
	365	{ .name = "groupid", .key = 131,
	366	.arg = "ID", .flags = 0,
	367	.doc = "Group ID the plugins will run as", .group = 3 },
	368	{ .name = "debug", .key = 132,
	369	.doc = "Debug mode", .group = 4 },
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	370	{ .name = NULL }
	371	};
	372
133 by Teddy Hogeborn * plugin-runner.c: Break a couple of long lines.	373	error_t parse_opt (int key, char *arg, __attribute__((unused))
	374	struct argp_state *state) {
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	375	switch (key) {
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	376	case 'g': /* --global-options */
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	377	if (arg != NULL){
24.1.50 by Björn Påhlsson changed from using strtok to strsep	378	char *p;
	379	while((p = strsep(&arg, ",")) != NULL){
24.1.51 by Björn Påhlsson Added configuration files support for mandos-client	380	if(p[0] == '\0'){
24.1.50 by Björn Påhlsson changed from using strtok to strsep	381	continue;
	382	}
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	383	if(not add_argument(getplugin(NULL), p)){
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	384	perror("add_argument");
	385	return ARGP_ERR_UNKNOWN;
	386	}
	387	}
	388	}
	389	break;
138 by Teddy Hogeborn * plugin-runner.c: Changed short option for "--global-env" to "-G",	390	case 'G': /* --global-env */
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	391	if(arg == NULL){
	392	break;
	393	}
24.1.92 by Björn Påhlsson Several memory leaks detected by valgrind fixed	394	if(not add_environment(getplugin(NULL), arg, true)){
	395	perror("add_environment");
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	396	}
	397	break;
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	398	case 'o': /* --options-for */
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	399	if (arg != NULL){
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	400	char *p_name = strsep(&arg, ":");
24.1.90 by Björn Påhlsson fixed two bugs:	401	if(p_name[0] == '\0' or arg == NULL){
24.1.50 by Björn Påhlsson changed from using strtok to strsep	402	break;
	403	}
	404	char *opt = strsep(&arg, ":");
24.1.90 by Björn Påhlsson fixed two bugs:	405	if(opt[0] == '\0' or opt == NULL){
24.1.50 by Björn Påhlsson changed from using strtok to strsep	406	break;
	407	}
24.1.90 by Björn Påhlsson fixed two bugs:	408	char *p;
	409	while((p = strsep(&opt, ",")) != NULL){
	410	if(p[0] == '\0'){
	411	continue;
	412	}
	413	if(not add_argument(getplugin(p_name), p)){
	414	perror("add_argument");
	415	return ARGP_ERR_UNKNOWN;
24.1.50 by Björn Påhlsson changed from using strtok to strsep	416	}
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	417	}
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	418	}
	419	break;
138 by Teddy Hogeborn * plugin-runner.c: Changed short option for "--global-env" to "-G",	420	case 'E': /* --env-for */
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	421	if(arg == NULL){
	422	break;
	423	}
	424	{
	425	char *envdef = strchr(arg, ':');
	426	if(envdef == NULL){
	427	break;
	428	}
24.1.92 by Björn Påhlsson Several memory leaks detected by valgrind fixed	429	*envdef = '\0';
	430	if(not add_environment(getplugin(arg), envdef+1, true)){
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	431	perror("add_environment");
	432	}
	433	}
	434	break;
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	435	case 'd': /* --disable */
24.1.5 by Björn Påhlsson plugbasedclient:	436	if (arg != NULL){
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	437	plugin *p = getplugin(arg);
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	438	if(p == NULL){
	439	return ARGP_ERR_UNKNOWN;
	440	}
	441	p->disabled = true;
24.1.5 by Björn Påhlsson plugbasedclient:	442	}
24.1.5 by Björn Påhlsson plugbasedclient:	443	break;
138 by Teddy Hogeborn * plugin-runner.c: Changed short option for "--global-env" to "-G",	444	case 'e': /* --enable */
	445	if (arg != NULL){
	446	plugin *p = getplugin(arg);
	447	if(p == NULL){
	448	return ARGP_ERR_UNKNOWN;
	449	}
	450	p->disabled = false;
	451	}
	452	break;
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	453	case 128: /* --plugin-dir */
24.1.92 by Björn Påhlsson Several memory leaks detected by valgrind fixed	454	free(plugindir);
24.1.69 by Björn Påhlsson added configfile as a optional argument to plugin-runner	455	plugindir = strdup(arg);
	456	if(plugindir == NULL){
	457	perror("strdup");
	458	}
24.1.5 by Björn Påhlsson plugbasedclient:	459	break;
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	460	case 129: /* --config-file */
137 by Teddy Hogeborn * plugin-runner.c (main/parse_opt): Removed code for "--config-file".	461	/* This is already done by parse_opt_config_file() */
	462	break;
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	463	case 130: /* --userid */
24.1.6 by Björn Påhlsson plugbasedclient	464	uid = (uid_t)strtol(arg, NULL, 10);
24.1.6 by Björn Påhlsson plugbasedclient	465	break;
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	466	case 131: /* --groupid */
24.1.6 by Björn Påhlsson plugbasedclient	467	gid = (gid_t)strtol(arg, NULL, 10);
24.1.6 by Björn Påhlsson plugbasedclient	468	break;
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	469	case 132: /* --debug */
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	470	debug = true;
	471	break;
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	472	case ARGP_KEY_ARG:
178 by Teddy Hogeborn * initramfs-tools-script: Fix permissions of "/tmp" in initrd.	473	/* Cryptsetup always passes an argument, which is an empty
	474	string if "none" was specified in /etc/crypttab. So if
	475	argument was empty, we ignore it silently. */
	476	if(arg[0] != '\0'){
	477	fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
	478	}
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	479	break;
	480	case ARGP_KEY_END:
	481	break;
	482	default:
	483	return ARGP_ERR_UNKNOWN;
	484	}
	485	return 0;
	486	}
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	487
137 by Teddy Hogeborn * plugin-runner.c (main/parse_opt): Removed code for "--config-file".	488	/* This option parser is the same as parse_opt() above, except it
	489	ignores everything but the --config-file option. */
	490	error_t parse_opt_config_file (int key, char *arg,
	491	__attribute__((unused))
	492	struct argp_state *state) {
	493	switch (key) {
	494	case 'g': /* --global-options */
138 by Teddy Hogeborn * plugin-runner.c: Changed short option for "--global-env" to "-G",	495	case 'G': /* --global-env */
137 by Teddy Hogeborn * plugin-runner.c (main/parse_opt): Removed code for "--config-file".	496	case 'o': /* --options-for */
138 by Teddy Hogeborn * plugin-runner.c: Changed short option for "--global-env" to "-G",	497	case 'E': /* --env-for */
137 by Teddy Hogeborn * plugin-runner.c (main/parse_opt): Removed code for "--config-file".	498	case 'd': /* --disable */
138 by Teddy Hogeborn * plugin-runner.c: Changed short option for "--global-env" to "-G",	499	case 'e': /* --enable */
137 by Teddy Hogeborn * plugin-runner.c (main/parse_opt): Removed code for "--config-file".	500	case 128: /* --plugin-dir */
	501	break;
	502	case 129: /* --config-file */
24.1.92 by Björn Påhlsson Several memory leaks detected by valgrind fixed	503	free(argfile);
137 by Teddy Hogeborn * plugin-runner.c (main/parse_opt): Removed code for "--config-file".	504	argfile = strdup(arg);
	505	if(argfile == NULL){
	506	perror("strdup");
	507	}
	508	break;
	509	case 130: /* --userid */
	510	case 131: /* --groupid */
	511	case 132: /* --debug */
	512	case ARGP_KEY_ARG:
	513	case ARGP_KEY_END:
	514	break;
	515	default:
	516	return ARGP_ERR_UNKNOWN;
	517	}
	518	return 0;
	519	}
	520
	521	struct argp argp = { .options = options,
	522	.parser = parse_opt_config_file,
136 by Teddy Hogeborn * plugin-runner.c (add_environment): Override existing environment	523	.args_doc = "",
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	524	.doc = "Mandos plugin runner -- Run plugins" };
	525
137 by Teddy Hogeborn * plugin-runner.c (main/parse_opt): Removed code for "--config-file".	526	/* Parse using the parse_opt_config_file in order to get the custom
	527	config file location, if any. */
	528	ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
	529	if (ret == ARGP_ERR_UNKNOWN){
	530	fprintf(stderr, "Unknown error while parsing arguments\n");
	531	exitstatus = EXIT_FAILURE;
	532	goto fallback;
	533	}
	534
	535	/* Reset to the normal argument parser */
	536	argp.parser = parse_opt;
	537
136 by Teddy Hogeborn * plugin-runner.c (add_environment): Override existing environment	538	/* Open the configfile if available */
24.1.69 by Björn Påhlsson added configfile as a optional argument to plugin-runner	539	if (argfile == NULL){
	540	conffp = fopen(AFILE, "r");
	541	} else {
	542	conffp = fopen(argfile, "r");
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	543	}
24.1.51 by Björn Påhlsson Added configuration files support for mandos-client	544	if(conffp != NULL){
	545	char *org_line = NULL;
24.1.54 by Björn Påhlsson plugin-runner	546	char p, arg, new_arg, line;
24.1.51 by Björn Påhlsson Added configuration files support for mandos-client	547	size_t size = 0;
	548	ssize_t sret;
	549	const char whitespace_delims[] = " \r\t\f\v\n";
	550	const char comment_delim[] = "#";
	551
24.1.67 by Björn Påhlsson transformed a function to a part of main	552	custom_argc = 1;
	553	custom_argv = malloc(sizeof(char) 2);
	554	if(custom_argv == NULL){
	555	perror("malloc");
	556	exitstatus = EXIT_FAILURE;
	557	goto fallback;
	558	}
	559	custom_argv[0] = argv[0];
	560	custom_argv[1] = NULL;
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	561
133 by Teddy Hogeborn * plugin-runner.c: Break a couple of long lines.	562	/* for each line in the config file, strip whitespace and ignore
	563	commented text */
24.1.51 by Björn Påhlsson Added configuration files support for mandos-client	564	while(true){
	565	sret = getline(&org_line, &size, conffp);
	566	if(sret == -1){
	567	break;
	568	}
	569
	570	line = org_line;
	571	arg = strsep(&line, comment_delim);
	572	while((p = strsep(&arg, whitespace_delims)) != NULL){
	573	if(p[0] == '\0'){
	574	continue;
	575	}
	576	new_arg = strdup(p);
24.1.69 by Björn Påhlsson added configfile as a optional argument to plugin-runner	577	if(new_arg == NULL){
	578	perror("strdup");
	579	exitstatus = EXIT_FAILURE;
	580	free(org_line);
	581	goto fallback;
	582	}
	583
24.1.67 by Björn Påhlsson transformed a function to a part of main	584	custom_argc += 1;
	585	custom_argv = realloc(custom_argv, sizeof(char *)
	586	* ((unsigned int) custom_argc + 1));
	587	if(custom_argv == NULL){
	588	perror("realloc");
24.1.51 by Björn Påhlsson Added configuration files support for mandos-client	589	exitstatus = EXIT_FAILURE;
24.1.67 by Björn Påhlsson transformed a function to a part of main	590	free(org_line);
24.1.54 by Björn Påhlsson plugin-runner	591	goto fallback;
24.1.51 by Björn Påhlsson Added configuration files support for mandos-client	592	}
24.1.67 by Björn Påhlsson transformed a function to a part of main	593	custom_argv[custom_argc-1] = new_arg;
	594	custom_argv[custom_argc] = NULL;
24.1.51 by Björn Påhlsson Added configuration files support for mandos-client	595	}
	596	}
	597	free(org_line);
136 by Teddy Hogeborn * plugin-runner.c (add_environment): Override existing environment	598	} else {
24.1.52 by Björn Påhlsson merge + minor adjustments	599	/* Check for harmful errors and go to fallback. Other errors might
24.1.52 by Björn Påhlsson merge + minor adjustments	600	not affect opening plugins */
24.1.51 by Björn Påhlsson Added configuration files support for mandos-client	601	if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
	602	perror("fopen");
24.1.8 by Björn Påhlsson plugbasedclient	603	exitstatus = EXIT_FAILURE;
24.1.54 by Björn Påhlsson plugin-runner	604	goto fallback;
24.1.8 by Björn Påhlsson plugbasedclient	605	}
24.1.51 by Björn Påhlsson Added configuration files support for mandos-client	606	}
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	607	/* If there was any arguments from configuration file,
	608	pass them to parser as command arguments */
24.1.51 by Björn Påhlsson Added configuration files support for mandos-client	609	if(custom_argv != NULL){
136 by Teddy Hogeborn * plugin-runner.c (add_environment): Override existing environment	610	ret = argp_parse (&argp, custom_argc, custom_argv, ARGP_IN_ORDER,
	611	0, NULL);
24.1.26 by Björn Påhlsson tally count of used symbols	612	if (ret == ARGP_ERR_UNKNOWN){
64 by Teddy Hogeborn * mandos-client.c (print_out_password): Strip trailing '\n'.	613	fprintf(stderr, "Unknown error while parsing arguments\n");
24.1.26 by Björn Påhlsson tally count of used symbols	614	exitstatus = EXIT_FAILURE;
24.1.54 by Björn Påhlsson plugin-runner	615	goto fallback;
24.1.26 by Björn Påhlsson tally count of used symbols	616	}
24.1.8 by Björn Påhlsson plugbasedclient	617	}
24.1.8 by Björn Påhlsson plugbasedclient	618
136 by Teddy Hogeborn * plugin-runner.c (add_environment): Override existing environment	619	/* Parse actual command line arguments, to let them override the
	620	config file */
	621	ret = argp_parse (&argp, argc, argv, ARGP_IN_ORDER, 0, NULL);
	622	if (ret == ARGP_ERR_UNKNOWN){
	623	fprintf(stderr, "Unknown error while parsing arguments\n");
	624	exitstatus = EXIT_FAILURE;
	625	goto fallback;
	626	}
	627
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	628	if(debug){
	629	for(plugin *p = plugin_list; p != NULL; p=p->next){
	630	fprintf(stderr, "Plugin: %s has %d arguments\n",
32 by Teddy Hogeborn * plugins.d/plugbasedclient.c (set_cloexec_flag): New function.	631	p->name ? p->name : "Global", p->argc - 1);
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	632	for(char *a = p->argv; a != NULL; a++){
	633	fprintf(stderr, "\tArg: %s\n", *a);
	634	}
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	635	fprintf(stderr, "...and %u environment variables\n", p->envc);
	636	for(char *a = p->environ; a != NULL; a++){
	637	fprintf(stderr, "\t%s\n", *a);
	638	}
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	639	}
	640	}
136 by Teddy Hogeborn * plugin-runner.c (add_environment): Override existing environment	641
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	642	/* Strip permissions down to nobody */
24.1.6 by Björn Påhlsson plugbasedclient	643	ret = setuid(uid);
	644	if (ret == -1){
	645	perror("setuid");
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	646	}
24.1.6 by Björn Påhlsson plugbasedclient	647	setgid(gid);
24.1.6 by Björn Påhlsson plugbasedclient	648	if (ret == -1){
39 by Teddy Hogeborn * plugins.d/mandosclient.c (pgp_packet_decrypt): Renamed variables.	649	perror("setgid");
24.1.6 by Björn Påhlsson plugbasedclient	650	}
136 by Teddy Hogeborn * plugin-runner.c (add_environment): Override existing environment	651
24.1.69 by Björn Påhlsson added configfile as a optional argument to plugin-runner	652	if (plugindir == NULL){
	653	dir = opendir(PDIR);
	654	} else {
	655	dir = opendir(plugindir);
	656	}
24.1.6 by Björn Påhlsson plugbasedclient	657
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	658	if(dir == NULL){
	659	perror("Could not open plugin dir");
	660	exitstatus = EXIT_FAILURE;
24.1.54 by Björn Påhlsson plugin-runner	661	goto fallback;
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	662	}
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	663
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	664	/* Set the FD_CLOEXEC flag on the directory, if possible */
	665	{
	666	int dir_fd = dirfd(dir);
	667	if(dir_fd >= 0){
	668	ret = set_cloexec_flag(dir_fd);
	669	if(ret < 0){
	670	perror("set_cloexec_flag");
	671	exitstatus = EXIT_FAILURE;
24.1.54 by Björn Påhlsson plugin-runner	672	goto fallback;
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	673	}
	674	}
	675	}
24.1.1 by Björn Påhlsson Added syntax and support for plugbasedclient arguments and how they	676
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	677	FD_ZERO(&rfds_all);
136 by Teddy Hogeborn * plugin-runner.c (add_environment): Override existing environment	678
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	679	/* Read and execute any executable in the plugin directory*/
13 by Björn Påhlsson Added following support:	680	while(true){
	681	dirst = readdir(dir);
	682
136 by Teddy Hogeborn * plugin-runner.c (add_environment): Override existing environment	683	/* All directory entries have been processed */
13 by Björn Påhlsson Added following support:	684	if(dirst == NULL){
24.1.26 by Björn Påhlsson tally count of used symbols	685	if (errno == EBADF){
	686	perror("readdir");
	687	exitstatus = EXIT_FAILURE;
24.1.54 by Björn Påhlsson plugin-runner	688	goto fallback;
24.1.26 by Björn Påhlsson tally count of used symbols	689	}
13 by Björn Påhlsson Added following support:	690	break;
	691	}
	692
	693	d_name_len = strlen(dirst->d_name);
	694
136 by Teddy Hogeborn * plugin-runner.c (add_environment): Override existing environment	695	/* Ignore dotfiles, backup files and other junk */
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	696	{
	697	bool bad_name = false;
	698
	699	const char const *bad_prefixes[] = { ".", "#", NULL };
	700
	701	const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
	702	".dpkg-old",
	703	".dpkg-divert", NULL };
	704	for(const char *pre = bad_prefixes; pre != NULL; pre++){
	705	size_t pre_len = strlen(*pre);
	706	if((d_name_len >= pre_len)
	707	and strncmp((dirst->d_name), *pre, pre_len) == 0){
	708	if(debug){
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	709	fprintf(stderr, "Ignoring plugin dir entry \"%s\""
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	710	" with bad prefix %s\n", dirst->d_name, *pre);
	711	}
	712	bad_name = true;
	713	break;
	714	}
	715	}
	716	if(bad_name){
	717	continue;
	718	}
	719	for(const char *suf = bad_suffixes; suf != NULL; suf++){
	720	size_t suf_len = strlen(*suf);
	721	if((d_name_len >= suf_len)
	722	and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
	723	== 0)){
	724	if(debug){
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	725	fprintf(stderr, "Ignoring plugin dir entry \"%s\""
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	726	" with bad suffix %s\n", dirst->d_name, *suf);
	727	}
	728	bad_name = true;
	729	break;
	730	}
	731	}
	732
	733	if(bad_name){
	734	continue;
	735	}
13 by Björn Påhlsson Added following support:	736	}
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	737
	738	char *filename;
169 by Teddy Hogeborn * plugin-runner.c (main): Bug fix: use built-in default value if	739	if(plugindir == NULL){
	740	ret = asprintf(&filename, PDIR "/%s", dirst->d_name);
	741	} else {
	742	ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
	743	}
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	744	if(ret < 0){
	745	perror("asprintf");
24.1.46 by Björn Påhlsson mandos-client	746	continue;
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	747	}
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	748
24.1.26 by Björn Påhlsson tally count of used symbols	749	ret = stat(filename, &st);
	750	if (ret == -1){
	751	perror("stat");
24.1.46 by Björn Påhlsson mandos-client	752	free(filename);
24.1.46 by Björn Påhlsson mandos-client	753	continue;
24.1.26 by Björn Påhlsson tally count of used symbols	754	}
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	755
	756	/* Ignore non-executable files */
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	757	if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
	758	if(debug){
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	759	fprintf(stderr, "Ignoring plugin dir entry \"%s\""
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	760	" with bad type or mode\n", filename);
	761	}
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	762	free(filename);
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	763	continue;
	764	}
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	765
	766	plugin *p = getplugin(dirst->d_name);
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	767	if(p == NULL){
	768	perror("getplugin");
	769	free(filename);
	770	continue;
	771	}
	772	if(p->disabled){
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	773	if(debug){
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	774	fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	775	dirst->d_name);
	776	}
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	777	free(filename);
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	778	continue;
	779	}
32 by Teddy Hogeborn * plugins.d/plugbasedclient.c (set_cloexec_flag): New function.	780	{
	781	/* Add global arguments to argument list for this plugin */
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	782	plugin *g = getplugin(NULL);
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	783	if(g != NULL){
	784	for(char *a = g->argv + 1; a != NULL; a++){
	785	if(not add_argument(p, *a)){
	786	perror("add_argument");
	787	}
	788	}
	789	/* Add global environment variables */
	790	for(char *e = g->environ; e != NULL; e++){
136 by Teddy Hogeborn * plugin-runner.c (add_environment): Override existing environment	791	if(not add_environment(p, *e, false)){
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	792	perror("add_environment");
	793	}
	794	}
	795	}
	796	}
	797	/* If this plugin has any environment variables, we will call
	798	using execve and need to duplicate the environment from this
	799	process, too. */
	800	if(p->environ[0] != NULL){
	801	for(char *e = environ; e != NULL; e++){
136 by Teddy Hogeborn * plugin-runner.c (add_environment): Override existing environment	802	if(not add_environment(p, *e, false)){
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	803	perror("add_environment");
	804	}
	805	}
	806	}
	807
98 by Teddy Hogeborn * plugin-runner.c (getplugin): Only copy "name" if not NULL. Free	808	int pipefd[2];
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	809	ret = pipe(pipefd);
	810	if (ret == -1){
	811	perror("pipe");
	812	exitstatus = EXIT_FAILURE;
24.1.54 by Björn Påhlsson plugin-runner	813	goto fallback;
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	814	}
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	815	/* Ask OS to automatic close the pipe on exec */
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	816	ret = set_cloexec_flag(pipefd[0]);
	817	if(ret < 0){
	818	perror("set_cloexec_flag");
	819	exitstatus = EXIT_FAILURE;
24.1.54 by Björn Påhlsson plugin-runner	820	goto fallback;
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	821	}
	822	ret = set_cloexec_flag(pipefd[1]);
	823	if(ret < 0){
	824	perror("set_cloexec_flag");
	825	exitstatus = EXIT_FAILURE;
24.1.54 by Björn Påhlsson plugin-runner	826	goto fallback;
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	827	}
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	828	/* Block SIGCHLD until process is safely in process list */
	829	ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
	830	if(ret < 0){
	831	perror("sigprocmask");
	832	exitstatus = EXIT_FAILURE;
24.1.54 by Björn Påhlsson plugin-runner	833	goto fallback;
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	834	}
136 by Teddy Hogeborn * plugin-runner.c (add_environment): Override existing environment	835	/* Starting a new process to be watched */
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	836	pid_t pid = fork();
24.1.46 by Björn Påhlsson mandos-client	837	if(pid == -1){
	838	perror("fork");
	839	exitstatus = EXIT_FAILURE;
24.1.54 by Björn Påhlsson plugin-runner	840	goto fallback;
24.1.46 by Björn Påhlsson mandos-client	841	}
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	842	if(pid == 0){
	843	/* this is the child process */
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	844	ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
	845	if(ret < 0){
	846	perror("sigaction");
	847	_exit(EXIT_FAILURE);
	848	}
	849	ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
	850	if(ret < 0){
	851	perror("sigprocmask");
	852	_exit(EXIT_FAILURE);
	853	}
24.1.26 by Björn Påhlsson tally count of used symbols	854
	855	ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
	856	if(ret == -1){
	857	perror("dup2");
	858	_exit(EXIT_FAILURE);
	859	}
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	860
	861	if(dirfd(dir) < 0){
	862	/* If dir has no file descriptor, we could not set FD_CLOEXEC
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	863	above and must now close it manually here. */
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	864	closedir(dir);
33 by Teddy Hogeborn * plugins.d/plugbasedclient.c (main): Close the pipe fd after dup2:ing	865	}
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	866	if(p->environ[0] == NULL){
	867	if(execv(filename, p->argv) < 0){
	868	perror("execv");
	869	_exit(EXIT_FAILURE);
	870	}
	871	} else {
	872	if(execve(filename, p->argv, p->environ) < 0){
	873	perror("execve");
	874	_exit(EXIT_FAILURE);
	875	}
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	876	}
	877	/* no return */
	878	}
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	879	/* Parent process */
	880	close(pipefd[1]); /* Close unused write end of pipe */
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	881	free(filename);
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	882	plugin *new_plugin = getplugin(dirst->d_name);
	883	if (new_plugin == NULL){
	884	perror("getplugin");
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	885	ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
	886	if(ret < 0){
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	887	perror("sigprocmask");
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	888	}
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	889	exitstatus = EXIT_FAILURE;
24.1.54 by Björn Påhlsson plugin-runner	890	goto fallback;
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	891	}
	892
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	893	new_plugin->pid = pid;
	894	new_plugin->fd = pipefd[0];
	895
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	896	/* Unblock SIGCHLD so signal handler can be run if this process
	897	has already completed */
	898	ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
	899	if(ret < 0){
	900	perror("sigprocmask");
	901	exitstatus = EXIT_FAILURE;
24.1.54 by Björn Påhlsson plugin-runner	902	goto fallback;
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	903	}
	904
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	905	FD_SET(new_plugin->fd, &rfds_all);
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	906
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	907	if (maxfd < new_plugin->fd){
	908	maxfd = new_plugin->fd;
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	909	}
	910
13 by Björn Påhlsson Added following support:	911	}
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	912
13 by Björn Påhlsson Added following support:	913	closedir(dir);
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	914	dir = NULL;
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	915
	916	for(plugin *p = plugin_list; p != NULL; p = p->next){
	917	if(p->pid != 0){
	918	break;
	919	}
	920	if(p->next == NULL){
	921	fprintf(stderr, "No plugin processes started. Incorrect plugin"
	922	" directory?\n");
	923	free_plugin_list();
	924	}
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	925	}
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	926
	927	/* Main loop while running plugins exist */
	928	while(plugin_list){
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	929	fd_set rfds = rfds_all;
	930	int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
	931	if (select_ret == -1){
	932	perror("select");
	933	exitstatus = EXIT_FAILURE;
24.1.54 by Björn Påhlsson plugin-runner	934	goto fallback;
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	935	}
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	936	/* OK, now either a process completed, or something can be read
	937	from one of them */
24.1.92 by Björn Påhlsson Several memory leaks detected by valgrind fixed	938	for(plugin *proc = plugin_list; proc != NULL;){
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	939	/* Is this process completely done? */
	940	if(proc->eof and proc->completed){
	941	/* Only accept the plugin output if it exited cleanly */
	942	if(not WIFEXITED(proc->status)
	943	or WEXITSTATUS(proc->status) != 0){
	944	/* Bad exit by plugin */
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	945
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	946	if(debug){
	947	if(WIFEXITED(proc->status)){
60 by Teddy Hogeborn * mandos-client.c (main): Cast pid_t to unsigned int before printing.	948	fprintf(stderr, "Plugin %u exited with status %d\n",
	949	(unsigned int) (proc->pid),
	950	WEXITSTATUS(proc->status));
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	951	} else if(WIFSIGNALED(proc->status)) {
60 by Teddy Hogeborn * mandos-client.c (main): Cast pid_t to unsigned int before printing.	952	fprintf(stderr, "Plugin %u killed by signal %d\n",
	953	(unsigned int) (proc->pid),
	954	WTERMSIG(proc->status));
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	955	} else if(WCOREDUMP(proc->status)){
60 by Teddy Hogeborn * mandos-client.c (main): Cast pid_t to unsigned int before printing.	956	fprintf(stderr, "Plugin %d dumped core\n",
	957	(unsigned int) (proc->pid));
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	958	}
	959	}
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	960
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	961	/* Remove the plugin */
	962	FD_CLR(proc->fd, &rfds_all);
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	963
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	964	/* Block signal while modifying process_list */
102 by Teddy Hogeborn * plugin-runner.c (process): Set "completed" and "status" as volatile.	965	ret = sigprocmask(SIG_BLOCK, &sigchld_action.sa_mask, NULL);
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	966	if(ret < 0){
	967	perror("sigprocmask");
	968	exitstatus = EXIT_FAILURE;
24.1.54 by Björn Påhlsson plugin-runner	969	goto fallback;
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	970	}
24.1.92 by Björn Påhlsson Several memory leaks detected by valgrind fixed	971
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	972	/* We are done modifying process list, so unblock signal */
	973	ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
	974	NULL);
	975	if(ret < 0){
	976	perror("sigprocmask");
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	977	exitstatus = EXIT_FAILURE;
	978	goto fallback;
	979	}
	980
	981	if(plugin_list == NULL){
	982	break;
	983	}
24.1.92 by Björn Påhlsson Several memory leaks detected by valgrind fixed	984
	985	plugin *next_plugin = proc->next;
	986	free_plugin(proc);
	987	proc = next_plugin;
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	988	continue;
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	989	}
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	990
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	991	/* This process exited nicely, so print its buffer */
24.1.42 by Björn Påhlsson Added fallback to mandos-client	992
102 by Teddy Hogeborn * plugin-runner.c (process): Set "completed" and "status" as volatile.	993	bool bret = print_out_password(proc->buffer,
	994	proc->buffer_length);
24.1.42 by Björn Påhlsson Added fallback to mandos-client	995	if(not bret){
	996	perror("print_out_password");
	997	exitstatus = EXIT_FAILURE;
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	998	}
24.1.54 by Björn Påhlsson plugin-runner	999	goto fallback;
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	1000	}
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	1001
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	1002	/* This process has not completed. Does it have any output? */
	1003	if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
	1004	/* This process had nothing to say at this time */
24.1.92 by Björn Påhlsson Several memory leaks detected by valgrind fixed	1005	proc = proc->next;
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	1006	continue;
	1007	}
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	1008	/* Before reading, make the process' data buffer large enough */
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	1009	if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
	1010	proc->buffer = realloc(proc->buffer, proc->buffer_size
	1011	+ (size_t) BUFFER_SIZE);
	1012	if (proc->buffer == NULL){
	1013	perror("malloc");
	1014	exitstatus = EXIT_FAILURE;
24.1.54 by Björn Påhlsson plugin-runner	1015	goto fallback;
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	1016	}
	1017	proc->buffer_size += BUFFER_SIZE;
	1018	}
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	1019	/* Read from the process */
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	1020	ret = read(proc->fd, proc->buffer + proc->buffer_length,
	1021	BUFFER_SIZE);
	1022	if(ret < 0){
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	1023	/* Read error from this process; ignore the error */
24.1.92 by Björn Påhlsson Several memory leaks detected by valgrind fixed	1024	proc = proc->next;
34 by Teddy Hogeborn * plugbasedclient.c (main): Check if plugin dir could be opened. Set	1025	continue;
	1026	}
	1027	if(ret == 0){
	1028	/* got EOF */
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	1029	proc->eof = true;
	1030	} else {
	1031	proc->buffer_length += (size_t) ret;
13 by Björn Påhlsson Added following support:	1032	}
	1033	}
	1034	}
24.1.45 by Björn Påhlsson Fixed fallback on error in mandos-client	1035
	1036
24.1.54 by Björn Påhlsson plugin-runner	1037	fallback:
24.1.42 by Björn Påhlsson Added fallback to mandos-client	1038
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	1039	if(plugin_list == NULL or exitstatus != EXIT_SUCCESS){
102 by Teddy Hogeborn * plugin-runner.c (process): Set "completed" and "status" as volatile.	1040	/* Fallback if all plugins failed, none are found or an error
	1041	occured */
24.1.42 by Björn Påhlsson Added fallback to mandos-client	1042	bool bret;
	1043	fprintf(stderr, "Going to fallback mode using getpass(3)\n");
	1044	char *passwordbuffer = getpass("Password: ");
168 by Teddy Hogeborn * initramfs-tools-hook: Use long options where available. Use only	1045	size_t len = strlen(passwordbuffer);
	1046	/* Strip trailing newline */
	1047	if(len > 0 and passwordbuffer[len-1] == '\n'){
	1048	passwordbuffer[len-1] = '\0'; /* not strictly necessary */
	1049	len--;
	1050	}
	1051	bret = print_out_password(passwordbuffer, len);
24.1.42 by Björn Påhlsson Added fallback to mandos-client	1052	if(not bret){
	1053	perror("print_out_password");
	1054	exitstatus = EXIT_FAILURE;
	1055	}
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	1056	}
24.1.42 by Björn Påhlsson Added fallback to mandos-client	1057
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	1058	/* Restore old signal handler */
24.1.54 by Björn Påhlsson plugin-runner	1059	ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
	1060	if(ret == -1){
	1061	perror("sigaction");
	1062	exitstatus = EXIT_FAILURE;
	1063	}
	1064
	1065	if(custom_argv != NULL){
24.1.67 by Björn Påhlsson transformed a function to a part of main	1066	for(char *arg = custom_argv+1; arg != NULL; arg++){
24.1.54 by Björn Påhlsson plugin-runner	1067	free(*arg);
78 by Teddy Hogeborn Add feature to specify custom environment variables for plugins.	1068	}
24.1.54 by Björn Påhlsson plugin-runner	1069	free(custom_argv);
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	1070	}
	1071
	1072	if(dir != NULL){
	1073	closedir(dir);
	1074	}
	1075
	1076	/* Free the process list and kill the processes */
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	1077	for(plugin *p = plugin_list; p != NULL; p = p->next){
	1078	if(p->pid != 0){
	1079	close(p->fd);
	1080	ret = kill(p->pid, SIGTERM);
	1081	if(ret == -1 and errno != ESRCH){
	1082	/* Set-uid proccesses might not get closed */
	1083	perror("kill");
	1084	}
24.1.26 by Björn Påhlsson tally count of used symbols	1085	}
13 by Björn Påhlsson Added following support:	1086	}
13 by Björn Påhlsson Added following support:	1087
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	1088	/* Wait for any remaining child processes to terminate */
	1089	do{
	1090	ret = wait(NULL);
	1091	} while(ret >= 0);
	1092	if(errno != ECHILD){
	1093	perror("wait");
	1094	}
24.1.69 by Björn Påhlsson added configfile as a optional argument to plugin-runner	1095
24.1.76 by Björn Påhlsson Rearranged so plugins and processes is the same thing	1096	free_plugin_list();
	1097
24.1.69 by Björn Påhlsson added configfile as a optional argument to plugin-runner	1098	free(plugindir);
	1099	free(argfile);
35 by Teddy Hogeborn * plugbasedclient.c (struct process): New fields "eof", "completed",	1100
31 by Teddy Hogeborn * plugins.d/plugbasedclient.c: Update include file comments.	1101	return exitstatus;
13 by Björn Påhlsson Added following support:	1102	}