/mandos/trunk : contents of plugin-runner.c at revision 134

: (revision 134)

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