21
21
* Contact the authors at <mandos@fukt.bsnet.se>.
24
#include <stdio.h> /* popen, fileno */
25
#include <iso646.h> /* and, or, not */
26
#include <sys/types.h> /* DIR, opendir, stat, struct stat, waitpid,
27
WIFEXITED, WEXITSTATUS, wait */
28
#include <sys/wait.h> /* wait */
29
#include <dirent.h> /* DIR, opendir */
30
#include <sys/stat.h> /* stat, struct stat */
31
#include <unistd.h> /* stat, struct stat, chdir */
32
#include <stdlib.h> /* EXIT_FAILURE */
33
#include <sys/select.h> /* fd_set, select, FD_ZERO, FD_SET,
35
#include <string.h> /* strlen, strcpy, strcat */
36
#include <stdbool.h> /* true */
37
#include <sys/wait.h> /* waitpid, WIFEXITED, WEXITSTATUS */
38
#include <errno.h> /* errno */
39
#include <argp.h> /* argp */
24
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
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(),
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(),
41
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
44
readdir(), closedir(), dirfd() */
45
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
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(),
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
54
#include <string.h> /* strsep, strlen(), asprintf() */
55
#include <errno.h> /* errno */
56
#include <argp.h> /* struct argp_option, struct
57
argp_state, struct argp,
58
argp_parse(), ARGP_ERR_UNKNOWN,
59
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
60
#include <signal.h> /* struct sigaction, sigemptyset(),
61
sigaddset(), sigaction(),
62
sigprocmask(), SIG_BLOCK, SIGCHLD,
63
SIG_UNBLOCK, kill() */
64
#include <errno.h> /* errno, EBADF */
66
#define BUFFER_SIZE 256
67
#define ARGFILE "/conf/conf.d/mandos/plugin-runner.conf"
69
const char *argp_program_version = "plugin-runner 1.0";
70
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
67
103
/* Create a new plugin */
68
104
plugin *new_plugin = malloc(sizeof(plugin));
69
105
if (new_plugin == NULL){
73
new_plugin->name = name;
108
*new_plugin = (plugin) { .name = name,
112
.next = *plugin_list };
74
114
new_plugin->argv = malloc(sizeof(char *) * 2);
75
115
if (new_plugin->argv == NULL){
79
119
new_plugin->argv[0] = name;
80
120
new_plugin->argv[1] = NULL;
82
new_plugin->disable = false;
83
new_plugin->next = *plugin_list;
122
new_plugin->environ = malloc(sizeof(char *));
123
if(new_plugin->environ == NULL){
124
free(new_plugin->argv);
128
new_plugin->environ[0] = NULL;
84
129
/* Append the new plugin to the list */
85
130
*plugin_list = new_plugin;
86
131
return new_plugin;
89
void addarguments(plugin *p, char *arg){
90
p->argv[p->argc] = arg;
91
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
97
p->argv[p->argc] = NULL;
100
#define BUFFER_SIZE 256
102
const char *argp_program_version =
103
"plugbasedclient 0.9";
104
const char *argp_program_bug_address =
105
"<mandos@fukt.bsnet.se>";
107
"Mandos plugin runner -- Run Mandos plugins";
108
/* A description of the arguments we accept. */
109
static char args_doc[] = "";
134
/* Helper function for add_argument and add_environment */
135
static bool add_to_char_array(const char *new, char ***array,
137
/* Resize the pointed-to array to hold one more pointer */
138
*array = realloc(*array, sizeof(char *)
139
* (size_t) ((*len) + 2));
144
/* Make a copy of the new string */
145
char *copy = strdup(new);
149
/* Insert the copy */
150
(*array)[*len] = copy;
152
/* Add a new terminating NULL pointer to the last element */
153
(*array)[*len] = NULL;
157
/* Add to a plugin's argument vector */
158
static bool add_argument(plugin *p, const char *arg){
162
return add_to_char_array(arg, &(p->argv), &(p->argc));
165
/* Add to a plugin's environment */
166
static bool add_environment(plugin *p, const char *def){
170
return add_to_char_array(def, &(p->environ), &(p->envc));
175
* Based on the example in the GNU LibC manual chapter 13.13 "File
177
* *Note File Descriptor Flags:(libc)Descriptor Flags.
179
static int set_cloexec_flag(int fd)
181
int ret = fcntl(fd, F_GETFD, 0);
182
/* If reading the flags failed, return error indication now. */
186
/* Store modified flag word in the descriptor. */
187
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
190
process *process_list = NULL;
192
/* Mark a process as completed when it exits, and save its exit
194
void handle_sigchld(__attribute__((unused)) int sig){
195
process *proc = process_list;
197
pid_t pid = wait(&status);
202
while(proc != NULL and proc->pid != pid){
206
/* Process not found in process list */
209
proc->status = status;
210
proc->completed = true;
213
bool print_out_password(const char *buffer, size_t length){
215
if(length>0 and buffer[length-1] == '\n'){
218
for(size_t written = 0; written < length; written += (size_t)ret){
219
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
228
char **add_to_argv(char **argv, int *argc, char *arg){
231
argv = malloc(sizeof(char*) * 2);
235
argv[0] = NULL; /* Will be set to argv[0] in main before parsing */
239
argv = realloc(argv, sizeof(char *)
240
* ((unsigned int) *argc + 1));
111
249
int main(int argc, char *argv[]){
112
const char *plugindir = "plugins.d";
250
const char *plugindir = "/lib/mandos/plugins.d";
251
const char *argfile = ARGFILE;
113
253
size_t d_name_len;
115
255
struct dirent *dirst;
118
258
int ret, maxfd = 0;
119
process *process_list = NULL;
262
int exitstatus = EXIT_SUCCESS;
263
struct sigaction old_sigchld_action;
264
struct sigaction sigchld_action = { .sa_handler = handle_sigchld,
265
.sa_flags = SA_NOCLDSTOP };
266
char **custom_argv = NULL;
269
/* Establish a signal handler */
270
sigemptyset(&sigchld_action.sa_mask);
271
ret = sigaddset(&sigchld_action.sa_mask, SIGCHLD);
276
ret = sigaction(SIGCHLD, &sigchld_action, &old_sigchld_action);
121
282
/* The options we understand. */
122
283
struct argp_option options[] = {
123
284
{ .name = "global-options", .key = 'g',
124
.arg = "option[,option[,...]]", .flags = 0,
125
.doc = "Options effecting all plugins" },
285
.arg = "OPTION[,OPTION[,...]]",
286
.doc = "Options passed to all plugins" },
287
{ .name = "global-envs", .key = 'e',
289
.doc = "Environment variable passed to all plugins" },
126
290
{ .name = "options-for", .key = 'o',
127
.arg = "plugin:option[,option[,...]]", .flags = 0,
128
.doc = "Options effecting only specified plugins" },
129
{ .name = "disable-plugin", .key = 'd',
130
.arg = "Plugin[,Plugin[,...]]", .flags = 0,
131
.doc = "Option to disable specififed plugins" },
291
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
292
.doc = "Options passed only to specified plugin" },
293
{ .name = "envs-for", .key = 'f',
294
.arg = "PLUGIN:ENV=value",
295
.doc = "Environment variable passed to specified plugin" },
296
{ .name = "disable", .key = 'd',
298
.doc = "Disable a specific plugin", .group = 1 },
132
299
{ .name = "plugin-dir", .key = 128,
133
.arg = "Directory", .flags = 0,
134
.doc = "Option to change directory to search for plugins" },
301
.doc = "Specify a different plugin directory", .group = 2 },
302
{ .name = "userid", .key = 129,
303
.arg = "ID", .flags = 0,
304
.doc = "User ID the plugins will run as", .group = 2 },
305
{ .name = "groupid", .key = 130,
306
.arg = "ID", .flags = 0,
307
.doc = "Group ID the plugins will run as", .group = 2 },
308
{ .name = "debug", .key = 131,
309
.doc = "Debug mode", .group = 3 },
138
313
error_t parse_opt (int key, char *arg, struct argp_state *state) {
139
/* Get the INPUT argument from `argp_parse', which we
140
know is a pointer to our arguments structure. */
314
/* Get the INPUT argument from `argp_parse', which we know is a
315
pointer to our plugin list pointer. */
141
316
plugin **plugins = state->input;
144
319
if (arg != NULL){
145
char *p = strtok(arg, ",");
147
addarguments(getplugin(NULL, plugins), p);
148
p = strtok(NULL, ",");
321
while((p = strsep(&arg, ",")) != NULL){
325
if(not add_argument(getplugin(NULL, plugins), p)){
326
perror("add_argument");
327
return ARGP_ERR_UNKNOWN;
337
char *envdef = strdup(arg);
341
if(not add_environment(getplugin(NULL, plugins), envdef)){
342
perror("add_environment");
153
347
if (arg != NULL){
154
char *name = strtok(arg, ":");
155
char *p = strtok(NULL, ":");
158
addarguments(getplugin(name, plugins), p);
159
p = strtok(NULL, ",");
348
char *p_name = strsep(&arg, ":");
349
if(p_name[0] == '\0'){
352
char *opt = strsep(&arg, ":");
358
while((p = strsep(&opt, ",")) != NULL){
362
if(not add_argument(getplugin(p_name, plugins), p)){
363
perror("add_argument");
364
return ARGP_ERR_UNKNOWN;
375
char *envdef = strchr(arg, ':');
379
char *p_name = strndup(arg, (size_t) (envdef-arg));
384
if(not add_environment(getplugin(p_name, plugins), envdef)){
385
perror("add_environment");
164
390
if (arg != NULL){
165
char *p = strtok(arg, ",");
167
getplugin(p, plugins)->disable = true;
168
p = strtok(NULL, ",");
391
plugin *p = getplugin(arg, plugins);
393
return ARGP_ERR_UNKNOWN;
402
uid = (uid_t)strtol(arg, NULL, 10);
405
gid = (gid_t)strtol(arg, NULL, 10);
175
410
case ARGP_KEY_ARG:
411
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
178
413
case ARGP_KEY_END:
186
421
plugin *plugin_list = NULL;
188
423
struct argp argp = { .options = options, .parser = parse_opt,
189
.args_doc = args_doc, .doc = doc };
191
argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
193
/* for(plugin *p = plugin_list; p != NULL; p=p->next){ */
194
/* fprintf(stderr, "Plugin: %s has %d arguments\n", p->name ? p->name : "Global", p->argc); */
195
/* for(char **a = p->argv + 1; *a != NULL; a++){ */
196
/* fprintf(stderr, "\tArg: %s\n", *a); */
424
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
425
.doc = "Mandos plugin runner -- Run plugins" };
427
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
428
if (ret == ARGP_ERR_UNKNOWN){
429
fprintf(stderr, "Unknown error while parsing arguments\n");
430
exitstatus = EXIT_FAILURE;
434
conffp = fopen(argfile, "r");
436
char *org_line = NULL;
439
char *p, *arg, *new_arg, *line;
440
const char whitespace_delims[] = " \r\t\f\v\n";
441
const char comment_delim[] = "#";
444
sret = getline(&org_line, &size, conffp);
450
arg = strsep(&line, comment_delim);
451
while((p = strsep(&arg, whitespace_delims)) != NULL){
456
custom_argv = add_to_argv(custom_argv, &custom_argc, new_arg);
457
if (custom_argv == NULL){
458
perror("add_to_argv");
459
exitstatus = EXIT_FAILURE;
466
/* Check for harmful errors and go to fallback. Other errors might
467
not affect opening plugins */
468
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
470
exitstatus = EXIT_FAILURE;
475
if(custom_argv != NULL){
476
custom_argv[0] = argv[0];
477
ret = argp_parse (&argp, custom_argc, custom_argv, 0, 0, &plugin_list);
478
if (ret == ARGP_ERR_UNKNOWN){
479
fprintf(stderr, "Unknown error while parsing arguments\n");
480
exitstatus = EXIT_FAILURE;
486
for(plugin *p = plugin_list; p != NULL; p=p->next){
487
fprintf(stderr, "Plugin: %s has %d arguments\n",
488
p->name ? p->name : "Global", p->argc - 1);
489
for(char **a = p->argv; *a != NULL; a++){
490
fprintf(stderr, "\tArg: %s\n", *a);
492
fprintf(stderr, "...and %u environment variables\n", p->envc);
493
for(char **a = p->environ; *a != NULL; a++){
494
fprintf(stderr, "\t%s\n", *a);
202
509
dir = opendir(plugindir);
205
fprintf(stderr, "Can not open directory\n");
511
perror("Could not open plugin dir");
512
exitstatus = EXIT_FAILURE;
516
/* Set the FD_CLOEXEC flag on the directory, if possible */
518
int dir_fd = dirfd(dir);
520
ret = set_cloexec_flag(dir_fd);
522
perror("set_cloexec_flag");
523
exitstatus = EXIT_FAILURE;
212
532
dirst = readdir(dir);
214
534
// All directory entries have been processed
215
535
if(dirst == NULL){
538
exitstatus = EXIT_FAILURE;
219
544
d_name_len = strlen(dirst->d_name);
221
// Ignore dotfiles and backup files
222
if (dirst->d_name[0] == '.'
223
or dirst->d_name[d_name_len - 1] == '~'){
227
char *filename = malloc(d_name_len + strlen(plugindir) + 2);
228
strcpy(filename, plugindir);
229
strcat(filename, "/");
230
strcat(filename, dirst->d_name);
234
if (S_ISREG(st.st_mode)
235
and (access(filename, X_OK) == 0)
236
and not (getplugin(dirst->d_name, &plugin_list)->disable)){
237
// Starting a new process to be watched
238
process *new_process = malloc(sizeof(process));
245
new_process->pid = fork();
246
if(new_process->pid == 0){
247
/* this is the child process */
546
// Ignore dotfiles, backup files and other junk
548
bool bad_name = false;
550
const char const *bad_prefixes[] = { ".", "#", NULL };
552
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
554
".dpkg-divert", NULL };
555
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
556
size_t pre_len = strlen(*pre);
557
if((d_name_len >= pre_len)
558
and strncmp((dirst->d_name), *pre, pre_len) == 0){
560
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
561
" with bad prefix %s\n", dirst->d_name, *pre);
572
for(const char **suf = bad_suffixes; *suf != NULL; suf++){
573
size_t suf_len = strlen(*suf);
574
if((d_name_len >= suf_len)
575
and (strcmp((dirst->d_name)+d_name_len-suf_len, *suf)
578
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
579
" with bad suffix %s\n", dirst->d_name, *suf);
592
ret = asprintf(&filename, "%s/%s", plugindir, dirst->d_name);
598
ret = stat(filename, &st);
605
if (not S_ISREG(st.st_mode) or (access(filename, X_OK) != 0)){
607
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
608
" with bad type or mode\n", filename);
613
plugin *p = getplugin(dirst->d_name, &plugin_list);
621
fprintf(stderr, "Ignoring disabled plugin \"%s\"\n",
628
/* Add global arguments to argument list for this plugin */
629
plugin *g = getplugin(NULL, &plugin_list);
631
for(char **a = g->argv + 1; *a != NULL; a++){
632
if(not add_argument(p, *a)){
633
perror("add_argument");
636
/* Add global environment variables */
637
for(char **e = g->environ; *e != NULL; e++){
638
if(not add_environment(p, *e)){
639
perror("add_environment");
644
/* If this plugin has any environment variables, we will call
645
using execve and need to duplicate the environment from this
647
if(p->environ[0] != NULL){
648
for(char **e = environ; *e != NULL; e++){
649
char *copy = strdup(*e);
654
if(not add_environment(p, copy)){
655
perror("add_environment");
664
exitstatus = EXIT_FAILURE;
667
ret = set_cloexec_flag(pipefd[0]);
669
perror("set_cloexec_flag");
670
exitstatus = EXIT_FAILURE;
673
ret = set_cloexec_flag(pipefd[1]);
675
perror("set_cloexec_flag");
676
exitstatus = EXIT_FAILURE;
679
/* Block SIGCHLD until process is safely in process list */
680
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
682
perror("sigprocmask");
683
exitstatus = EXIT_FAILURE;
686
// Starting a new process to be watched
690
exitstatus = EXIT_FAILURE;
694
/* this is the child process */
695
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
700
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
702
perror("sigprocmask");
706
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
713
/* If dir has no file descriptor, we could not set FD_CLOEXEC
714
above and must now close it manually here. */
249
close(pipefd[0]); /* close unused read end of pipe */
250
dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
252
plugin *p = getplugin(dirst->d_name, &plugin_list);
253
plugin *g = getplugin(NULL, &plugin_list);
254
for(char **a = g->argv + 1; *a != NULL; a++){
717
if(p->environ[0] == NULL){
257
718
if(execv(filename, p->argv) < 0){
264
close(pipefd[1]); /* close unused write end of pipe */
265
new_process->fd = pipefd[0];
266
new_process->buffer = malloc(BUFFER_SIZE);
267
if (new_process->buffer == NULL){
271
new_process->buffer_size = BUFFER_SIZE;
272
new_process->buffer_length = 0;
273
FD_SET(new_process->fd, &rfds_orig);
275
if (maxfd < new_process->fd){
276
maxfd = new_process->fd;
280
new_process->next = process_list;
281
process_list = new_process;
723
if(execve(filename, p->argv, p->environ) < 0){
732
close(pipefd[1]); /* close unused write end of pipe */
733
process *new_process = malloc(sizeof(process));
734
if (new_process == NULL){
736
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
738
perror("sigprocmask");
740
exitstatus = EXIT_FAILURE;
744
*new_process = (struct process){ .pid = pid,
746
.next = process_list };
748
process_list = new_process;
749
/* Unblock SIGCHLD so signal handler can be run if this process
750
has already completed */
751
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
753
perror("sigprocmask");
754
exitstatus = EXIT_FAILURE;
758
FD_SET(new_process->fd, &rfds_all);
760
if (maxfd < new_process->fd){
761
maxfd = new_process->fd;
766
/* Free the plugin list */
767
for(plugin *next; plugin_list != NULL; plugin_list = next){
768
next = plugin_list->next;
769
free(plugin_list->argv);
770
if(plugin_list->environ[0] != NULL){
771
for(char **e = plugin_list->environ; *e != NULL; e++){
287
if (process_list != NULL){
289
fd_set rfds = rfds_orig;
290
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
291
if (select_ret == -1){
295
for(process *process_itr = process_list; process_itr != NULL;
296
process_itr = process_itr->next){
297
if(FD_ISSET(process_itr->fd, &rfds)){
298
if(process_itr->buffer_length + BUFFER_SIZE
299
> process_itr->buffer_size){
300
process_itr->buffer = realloc(process_itr->buffer,
301
process_itr->buffer_size
302
+ (size_t) BUFFER_SIZE);
303
if (process_itr->buffer == NULL){
307
process_itr->buffer_size += BUFFER_SIZE;
309
ret = read(process_itr->fd, process_itr->buffer
310
+ process_itr->buffer_length, BUFFER_SIZE);
312
/* Read error from this process; ignore it */
315
process_itr->buffer_length += (size_t) ret;
318
/* wait for process exit */
320
waitpid(process_itr->pid, &status, 0);
321
if(WIFEXITED(status) and WEXITSTATUS(status) == 0){
322
for(size_t written = 0;
323
written < process_itr->buffer_length;){
324
ret = write(STDOUT_FILENO,
325
process_itr->buffer + written,
326
process_itr->buffer_length - written);
331
written += (size_t)ret;
335
FD_CLR(process_itr->fd, &rfds_orig);
781
if (process_list == NULL){
782
fprintf(stderr, "No plugin processes started. Incorrect plugin"
787
fd_set rfds = rfds_all;
788
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
789
if (select_ret == -1){
791
exitstatus = EXIT_FAILURE;
794
/* OK, now either a process completed, or something can be read
796
for(process *proc = process_list; proc ; proc = proc->next){
797
/* Is this process completely done? */
798
if(proc->eof and proc->completed){
799
/* Only accept the plugin output if it exited cleanly */
800
if(not WIFEXITED(proc->status)
801
or WEXITSTATUS(proc->status) != 0){
802
/* Bad exit by plugin */
804
if(WIFEXITED(proc->status)){
805
fprintf(stderr, "Plugin %u exited with status %d\n",
806
(unsigned int) (proc->pid),
807
WEXITSTATUS(proc->status));
808
} else if(WIFSIGNALED(proc->status)) {
809
fprintf(stderr, "Plugin %u killed by signal %d\n",
810
(unsigned int) (proc->pid),
811
WTERMSIG(proc->status));
812
} else if(WCOREDUMP(proc->status)){
813
fprintf(stderr, "Plugin %d dumped core\n",
814
(unsigned int) (proc->pid));
817
/* Remove the plugin */
818
FD_CLR(proc->fd, &rfds_all);
819
/* Block signal while modifying process_list */
820
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
822
perror("sigprocmask");
823
exitstatus = EXIT_FAILURE;
826
/* Delete this process entry from the list */
827
if(process_list == proc){
828
/* First one - simple */
829
process_list = proc->next;
831
/* Second one or later */
832
for(process *p = process_list; p != NULL; p = p->next){
834
p->next = proc->next;
839
/* We are done modifying process list, so unblock signal */
840
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
843
perror("sigprocmask");
847
/* We deleted this process from the list, so we can't go
848
proc->next. Therefore, start over from the beginning of
852
/* This process exited nicely, so print its buffer */
854
bool bret = print_out_password(proc->buffer, proc->buffer_length);
856
perror("print_out_password");
857
exitstatus = EXIT_FAILURE;
861
/* This process has not completed. Does it have any output? */
862
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
863
/* This process had nothing to say at this time */
866
/* Before reading, make the process' data buffer large enough */
867
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
868
proc->buffer = realloc(proc->buffer, proc->buffer_size
869
+ (size_t) BUFFER_SIZE);
870
if (proc->buffer == NULL){
872
exitstatus = EXIT_FAILURE;
875
proc->buffer_size += BUFFER_SIZE;
877
/* Read from the process */
878
ret = read(proc->fd, proc->buffer + proc->buffer_length,
881
/* Read error from this process; ignore the error */
888
proc->buffer_length += (size_t) ret;
345
for(process *process_itr = process_list; process_itr != NULL;
346
process_itr = process_itr->next){
347
close(process_itr->fd);
348
kill(process_itr->pid, SIGTERM);
349
free(process_itr->buffer);
896
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
897
/* Fallback if all plugins failed, none are found or an error occured */
899
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
900
char *passwordbuffer = getpass("Password: ");
901
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
903
perror("print_out_password");
904
exitstatus = EXIT_FAILURE;
909
/* Restore old signal handler */
910
sigaction(SIGCHLD, &old_sigchld_action, NULL);
914
/* Free the plugin list */
915
for(plugin *next; plugin_list != NULL; plugin_list = next){
916
next = plugin_list->next;
917
free(plugin_list->argv);
918
if(plugin_list->environ[0] != NULL){
919
for(char **e = plugin_list->environ; *e != NULL; e++){
923
free(plugin_list->environ);
931
/* Free the process list and kill the processes */
932
for(process *next; process_list != NULL; process_list = next){
933
next = process_list->next;
934
close(process_list->fd);
935
ret = kill(process_list->pid, SIGTERM);
936
if(ret == -1 and errno != ESRCH){
937
/* set-uid proccesses migth not get closed */
940
free(process_list->buffer);
944
/* Wait for any remaining child processes to terminate */