38
37
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
39
38
FD_SET(), FD_ISSET(), FD_CLR */
40
39
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
43
41
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
44
42
#include <iso646.h> /* and, or, not */
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
46
44
readdir(), closedir(), dirfd() */
47
45
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
46
fcntl(), setuid(), setgid(),
49
47
F_GETFD, F_SETFD, FD_CLOEXEC,
50
48
access(), pipe(), fork(), close()
51
dup2(), STDOUT_FILENO, _exit(),
49
dup2, STDOUT_FILENO, _exit(),
52
50
execv(), write(), read(),
54
52
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
56
#include <string.h> /* strsep, strlen(), asprintf(),
54
#include <string.h> /* strtok, strlen(), strcpy(),
58
56
#include <errno.h> /* errno */
59
57
#include <argp.h> /* struct argp_option, struct
60
58
argp_state, struct argp,
61
59
argp_parse(), ARGP_ERR_UNKNOWN,
62
ARGP_KEY_END, ARGP_KEY_ARG,
60
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
64
61
#include <signal.h> /* struct sigaction, sigemptyset(),
65
62
sigaddset(), sigaction(),
66
63
sigprocmask(), SIG_BLOCK, SIGCHLD,
67
SIG_UNBLOCK, kill(), sig_atomic_t
64
SIG_UNBLOCK, kill() */
69
65
#include <errno.h> /* errno, EBADF */
70
#include <inttypes.h> /* intmax_t, PRIdMAX, strtoimax() */
71
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_IOERR,
72
EX_CONFIG, EX_UNAVAILABLE, EX_OK */
74
67
#define BUFFER_SIZE 256
76
#define PDIR "/lib/mandos/plugins.d"
77
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
79
const char *argp_program_version = "plugin-runner " VERSION;
69
const char *argp_program_version = "mandos-client 1.0";
80
70
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
82
typedef struct plugin{
83
char *name; /* can be NULL or any plugin name */
90
/* Variables used for running processes*/
74
typedef struct process{
94
78
size_t buffer_size;
95
79
size_t buffer_length;
97
volatile sig_atomic_t completed;
86
typedef struct plugin{
87
char *name; /* can be NULL or any plugin name */
99
91
struct plugin *next;
102
static plugin *plugin_list = NULL;
104
/* Gets an existing plugin based on name,
105
or if none is found, creates a new one */
106
static plugin *getplugin(char *name){
107
/* Check for existing plugin with that name */
108
for(plugin *p = plugin_list; p != NULL; p = p->next){
110
or (p->name and name and (strcmp(p->name, name) == 0))){
94
static plugin *getplugin(char *name, plugin **plugin_list){
95
for (plugin *p = *plugin_list; p != NULL; p = p->next){
97
or (p->name and name and (strcmp(p->name, name) == 0))){
114
101
/* Create a new plugin */
115
plugin *new_plugin = NULL;
117
new_plugin = malloc(sizeof(plugin));
118
} while(new_plugin == NULL and errno == EINTR);
119
if(new_plugin == NULL){
122
char *copy_name = NULL;
125
copy_name = strdup(name);
126
} while(copy_name == NULL and errno == EINTR);
127
if(copy_name == NULL){
135
*new_plugin = (plugin){ .name = copy_name,
138
.next = plugin_list };
141
new_plugin->argv = malloc(sizeof(char *) * 2);
142
} while(new_plugin->argv == NULL and errno == EINTR);
143
if(new_plugin->argv == NULL){
150
new_plugin->argv[0] = copy_name;
102
plugin *new_plugin = malloc(sizeof(plugin));
103
if (new_plugin == NULL){
107
new_plugin->name = name;
108
new_plugin->argv = malloc(sizeof(char *) * 2);
109
if (new_plugin->argv == NULL){
113
new_plugin->argv[0] = name;
151
114
new_plugin->argv[1] = NULL;
154
new_plugin->environ = malloc(sizeof(char *));
155
} while(new_plugin->environ == NULL and errno == EINTR);
156
if(new_plugin->environ == NULL){
159
free(new_plugin->argv);
164
new_plugin->environ[0] = NULL;
115
new_plugin->argc = 1;
116
new_plugin->disabled = false;
117
new_plugin->next = *plugin_list;
166
118
/* Append the new plugin to the list */
167
plugin_list = new_plugin;
119
*plugin_list = new_plugin;
168
120
return new_plugin;
171
/* Helper function for add_argument and add_environment */
172
static bool add_to_char_array(const char *new, char ***array,
174
/* Resize the pointed-to array to hold one more pointer */
176
*array = realloc(*array, sizeof(char *)
177
* (size_t) ((*len) + 2));
178
} while(*array == NULL and errno == EINTR);
183
/* Make a copy of the new string */
187
} while(copy == NULL and errno == EINTR);
191
/* Insert the copy */
192
(*array)[*len] = copy;
194
/* Add a new terminating NULL pointer to the last element */
195
(*array)[*len] = NULL;
199
/* Add to a plugin's argument vector */
200
static bool add_argument(plugin *p, const char *arg){
204
return add_to_char_array(arg, &(p->argv), &(p->argc));
207
/* Add to a plugin's environment */
208
static bool add_environment(plugin *p, const char *def, bool replace){
212
/* namelen = length of name of environment variable */
213
size_t namelen = (size_t)(strchrnul(def, '=') - def);
214
/* Search for this environment variable */
215
for(char **e = p->environ; *e != NULL; e++){
216
if(strncmp(*e, def, namelen + 1) == 0){
217
/* It already exists */
221
new = realloc(*e, strlen(def) + 1);
222
} while(new == NULL and errno == EINTR);
232
return add_to_char_array(def, &(p->environ), &(p->envc));
123
static void addargument(plugin *p, char *arg){
124
p->argv[p->argc] = arg;
125
p->argv = realloc(p->argv, sizeof(char *) * (size_t)(p->argc + 2));
126
if (p->argv == NULL){
131
p->argv[p->argc] = NULL;
236
135
* Based on the example in the GNU LibC manual chapter 13.13 "File
237
136
* Descriptor Flags".
238
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
137
* *Note File Descriptor Flags:(libc)Descriptor Flags.
240
static int set_cloexec_flag(int fd){
241
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
139
static int set_cloexec_flag(int fd)
141
int ret = fcntl(fd, F_GETFD, 0);
242
142
/* If reading the flags failed, return error indication now. */
246
146
/* Store modified flag word in the descriptor. */
247
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
147
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
150
process *process_list = NULL;
252
/* Mark processes as completed when they exit, and save their exit
152
/* Mark a process as completed when it exits, and save its exit
254
static void handle_sigchld(__attribute__((unused)) int sig){
255
int old_errno = errno;
257
plugin *proc = plugin_list;
259
pid_t pid = waitpid(-1, &status, WNOHANG);
261
/* Only still running child processes */
266
/* No child processes */
272
/* A child exited, find it in process_list */
273
while(proc != NULL and proc->pid != pid){
277
/* Process not found in process list */
280
proc->status = status;
154
void handle_sigchld(__attribute__((unused)) int sig){
155
process *proc = process_list;
157
pid_t pid = wait(&status);
162
while(proc != NULL and proc->pid != pid){
166
/* Process not found in process list */
169
proc->status = status;
170
proc->completed = true;
286
/* Prints out a password to stdout */
287
static bool print_out_password(const char *buffer, size_t length){
173
bool print_out_password(const char *buffer, size_t length){
175
if(length>0 and buffer[length-1] == '\n'){
289
178
for(size_t written = 0; written < length; written += (size_t)ret){
290
179
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
291
180
length - written));
373
223
{ .name = "global-options", .key = 'g',
374
224
.arg = "OPTION[,OPTION[,...]]",
375
225
.doc = "Options passed to all plugins" },
376
{ .name = "global-env", .key = 'G',
378
.doc = "Environment variable passed to all plugins" },
379
226
{ .name = "options-for", .key = 'o',
380
227
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
381
228
.doc = "Options passed only to specified plugin" },
382
{ .name = "env-for", .key = 'E',
383
.arg = "PLUGIN:ENV=value",
384
.doc = "Environment variable passed to specified plugin" },
385
229
{ .name = "disable", .key = 'd',
387
231
.doc = "Disable a specific plugin", .group = 1 },
388
{ .name = "enable", .key = 'e',
390
.doc = "Enable a specific plugin", .group = 1 },
391
232
{ .name = "plugin-dir", .key = 128,
392
233
.arg = "DIRECTORY",
393
234
.doc = "Specify a different plugin directory", .group = 2 },
394
{ .name = "config-file", .key = 129,
396
.doc = "Specify a different configuration file", .group = 2 },
397
{ .name = "userid", .key = 130,
398
.arg = "ID", .flags = 0,
399
.doc = "User ID the plugins will run as", .group = 3 },
400
{ .name = "groupid", .key = 131,
401
.arg = "ID", .flags = 0,
402
.doc = "Group ID the plugins will run as", .group = 3 },
403
{ .name = "debug", .key = 132,
404
.doc = "Debug mode", .group = 4 },
406
* These reproduce what we would get without ARGP_NO_HELP
408
{ .name = "help", .key = '?',
409
.doc = "Give this help list", .group = -1 },
410
{ .name = "usage", .key = -3,
411
.doc = "Give a short usage message", .group = -1 },
412
{ .name = "version", .key = 'V',
413
.doc = "Print program version", .group = -1 },
235
{ .name = "userid", .key = 129,
236
.arg = "ID", .flags = 0,
237
.doc = "User ID the plugins will run as", .group = 2 },
238
{ .name = "groupid", .key = 130,
239
.arg = "ID", .flags = 0,
240
.doc = "Group ID the plugins will run as", .group = 2 },
241
{ .name = "debug", .key = 131,
242
.doc = "Debug mode", .group = 3 },
417
error_t parse_opt(int key, char *arg, struct argp_state *state){
422
case 'g': /* --global-options */
425
while((plugin_option = strsep(&arg, ",")) != NULL){
426
if(not add_argument(getplugin(NULL), plugin_option)){
432
case 'G': /* --global-env */
433
add_environment(getplugin(NULL), arg, true);
435
case 'o': /* --options-for */
437
char *option_list = strchr(arg, ':');
438
if(option_list == NULL){
439
argp_error(state, "No colon in \"%s\"", arg);
446
argp_error(state, "Empty plugin name");
451
while((option = strsep(&option_list, ",")) != NULL){
452
if(not add_argument(getplugin(arg), option)){
458
case 'E': /* --env-for */
460
char *envdef = strchr(arg, ':');
462
argp_error(state, "No colon in \"%s\"", arg);
469
argp_error(state, "Empty plugin name");
473
add_environment(getplugin(arg), envdef, true);
476
case 'd': /* --disable */
478
plugin *p = getplugin(arg);
484
case 'e': /* --enable */
486
plugin *p = getplugin(arg);
492
case 128: /* --plugin-dir */
494
plugindir = strdup(arg);
496
case 129: /* --config-file */
497
/* This is already done by parse_opt_config_file() */
499
case 130: /* --userid */
500
tmpmax = strtoimax(arg, &tmp, 10);
501
if(errno != 0 or tmp == arg or *tmp != '\0'
502
or tmpmax != (uid_t)tmpmax){
503
argp_error(state, "Bad user ID number: \"%s\", using %"
504
PRIdMAX, arg, (intmax_t)uid);
509
case 131: /* --groupid */
510
tmpmax = strtoimax(arg, &tmp, 10);
511
if(errno != 0 or tmp == arg or *tmp != '\0'
512
or tmpmax != (gid_t)tmpmax){
513
argp_error(state, "Bad group ID number: \"%s\", using %"
514
PRIdMAX, arg, (intmax_t)gid);
519
case 132: /* --debug */
246
error_t parse_opt (int key, char *arg, struct argp_state *state) {
247
/* Get the INPUT argument from `argp_parse', which we know is a
248
pointer to our plugin list pointer. */
249
plugin **plugins = state->input;
253
char *p = strtok(arg, ",");
255
addargument(getplugin(NULL, plugins), p);
256
p = strtok(NULL, ",");
262
char *name = strtok(arg, ":");
263
char *p = strtok(NULL, ":");
267
addargument(getplugin(name, plugins), p);
268
p = strtok(NULL, ",");
275
getplugin(arg, plugins)->disabled = true;
282
uid = (uid_t)strtol(arg, NULL, 10);
285
gid = (gid_t)strtol(arg, NULL, 10);
523
* These reproduce what we would get without ARGP_NO_HELP
525
case '?': /* --help */
526
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
527
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
528
case -3: /* --usage */
529
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
530
argp_state_help(state, state->out_stream,
531
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
532
case 'V': /* --version */
533
fprintf(state->out_stream, "%s\n", argp_program_version);
537
* When adding more options before this line, remember to also add a
538
* "case" to the "parse_opt_config_file" function below.
540
290
case ARGP_KEY_ARG:
541
/* Cryptsetup always passes an argument, which is an empty
542
string if "none" was specified in /etc/crypttab. So if
543
argument was empty, we ignore it silently. */
291
if(plus_options != NULL or arg == NULL or arg[0] != '+'){
548
return ARGP_ERR_UNKNOWN;
550
return errno; /* Set to 0 at start */
553
/* This option parser is the same as parse_opt() above, except it
554
ignores everything but the --config-file option. */
555
error_t parse_opt_config_file(int key, char *arg,
556
__attribute__((unused))
557
struct argp_state *state){
560
case 'g': /* --global-options */
561
case 'G': /* --global-env */
562
case 'o': /* --options-for */
563
case 'E': /* --env-for */
564
case 'd': /* --disable */
565
case 'e': /* --enable */
566
case 128: /* --plugin-dir */
568
case 129: /* --config-file */
570
argfile = strdup(arg);
572
case 130: /* --userid */
573
case 131: /* --groupid */
574
case 132: /* --debug */
575
case '?': /* --help */
576
case -3: /* --usage */
577
case 'V': /* --version */
581
return ARGP_ERR_UNKNOWN;
586
struct argp argp = { .options = options,
587
.parser = parse_opt_config_file,
299
return ARGP_ERR_UNKNOWN;
304
plugin *plugin_list = NULL;
306
struct argp argp = { .options = options, .parser = parse_opt,
307
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
589
308
.doc = "Mandos plugin runner -- Run plugins" };
591
/* Parse using parse_opt_config_file() in order to get the custom
592
config file location, if any. */
593
ret = argp_parse(&argp, argc, argv,
594
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
602
perror("argp_parse");
603
exitstatus = EX_OSERR;
606
exitstatus = EX_USAGE;
610
/* Reset to the normal argument parser */
611
argp.parser = parse_opt;
613
/* Open the configfile if available */
615
conffp = fopen(AFILE, "r");
617
conffp = fopen(argfile, "r");
620
char *org_line = NULL;
621
char *p, *arg, *new_arg, *line;
623
const char whitespace_delims[] = " \r\t\f\v\n";
624
const char comment_delim[] = "#";
627
custom_argv = malloc(sizeof(char*) * 2);
628
if(custom_argv == NULL){
310
ret = argp_parse (&argp, argc, argv, 0, 0, &plugin_list);
311
if (ret == ARGP_ERR_UNKNOWN){
312
fprintf(stderr, "Unknown error while parsing arguments\n");
313
exitstatus = EXIT_FAILURE;
318
/* This is a mangled argument in the form of
319
"+--option+--other-option=parameter+--yet-another-option", etc */
320
/* Make new argc and argv vars, and call argp_parse() again. */
321
plus_options++; /* skip the first '+' character */
322
const char delims[] = "+";
325
plus_argv = malloc(sizeof(char*) * 2);
326
if(plus_argv == NULL){
629
327
perror("malloc");
630
exitstatus = EX_OSERR;
633
custom_argv[0] = argv[0];
634
custom_argv[1] = NULL;
636
/* for each line in the config file, strip whitespace and ignore
639
sret = getline(&org_line, &size, conffp);
645
arg = strsep(&line, comment_delim);
646
while((p = strsep(&arg, whitespace_delims)) != NULL){
653
exitstatus = EX_OSERR;
659
custom_argv = realloc(custom_argv, sizeof(char *)
660
* ((unsigned int) custom_argc + 1));
661
if(custom_argv == NULL){
663
exitstatus = EX_OSERR;
667
custom_argv[custom_argc-1] = new_arg;
668
custom_argv[custom_argc] = NULL;
672
ret = fclose(conffp);
673
} while(ret == EOF and errno == EINTR);
676
exitstatus = EX_IOERR;
681
/* Check for harmful errors and go to fallback. Other errors might
682
not affect opening plugins */
683
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
685
exitstatus = EX_IOERR;
689
/* If there were any arguments from the configuration file, pass
690
them to parser as command line arguments */
691
if(custom_argv != NULL){
692
ret = argp_parse(&argp, custom_argc, custom_argv,
693
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
701
perror("argp_parse");
702
exitstatus = EX_OSERR;
705
exitstatus = EX_CONFIG;
710
/* Parse actual command line arguments, to let them override the
712
ret = argp_parse(&argp, argc, argv,
713
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
721
perror("argp_parse");
722
exitstatus = EX_OSERR;
725
exitstatus = EX_USAGE;
328
exitstatus = EXIT_FAILURE;
331
plus_argv[0] = argv[0];
333
arg = strtok(plus_options, delims); /* Get first argument */
336
plus_argv = realloc(plus_argv, sizeof(char *)
337
* ((unsigned int) new_argc + 1));
338
if(plus_argv == NULL){
340
exitstatus = EXIT_FAILURE;
343
plus_argv[new_argc-1] = arg;
344
plus_argv[new_argc] = NULL;
345
arg = strtok(NULL, delims); /* Get next argument */
347
ret = argp_parse (&argp, new_argc, plus_argv, 0, 0, &plugin_list);
348
if (ret == ARGP_ERR_UNKNOWN){
349
fprintf(stderr, "Unknown error while parsing arguments\n");
350
exitstatus = EXIT_FAILURE;
997
547
above and must now close it manually here. */
1000
if(p->environ[0] == NULL){
1001
if(execv(filename, p->argv) < 0){
1006
if(execve(filename, p->argv, p->environ) < 0){
550
if(execv(filename, p->argv) < 0){
1013
/* Parent process */
1014
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1017
plugin *new_plugin = getplugin(dirst->d_name);
1018
if(new_plugin == NULL){
1019
perror("getplugin");
1020
ret = (int)(TEMP_FAILURE_RETRY
1021
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
558
close(pipefd[1]); /* close unused write end of pipe */
559
process *new_process = malloc(sizeof(process));
560
if (new_process == NULL){
562
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1024
perror("sigprocmask");
564
perror("sigprocmask");
1026
exitstatus = EX_OSERR;
566
exitstatus = EXIT_FAILURE;
1030
new_plugin->pid = pid;
1031
new_plugin->fd = pipefd[0];
570
*new_process = (struct process){ .pid = pid,
572
.next = process_list };
574
process_list = new_process;
1033
575
/* Unblock SIGCHLD so signal handler can be run if this process
1034
576
has already completed */
1035
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1036
&sigchld_action.sa_mask,
577
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1039
579
perror("sigprocmask");
1040
exitstatus = EX_OSERR;
1044
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1047
if(maxfd < new_plugin->fd){
1048
maxfd = new_plugin->fd;
1052
TEMP_FAILURE_RETRY(closedir(dir));
580
exitstatus = EXIT_FAILURE;
584
FD_SET(new_process->fd, &rfds_all);
586
if (maxfd < new_process->fd){
587
maxfd = new_process->fd;
592
/* Free the plugin list */
593
for(plugin *next; plugin_list != NULL; plugin_list = next){
594
next = plugin_list->next;
595
free(plugin_list->argv);
1054
free_plugin(getplugin(NULL));
1056
for(plugin *p = plugin_list; p != NULL; p = p->next){
1060
if(p->next == NULL){
1061
fprintf(stderr, "No plugin processes started. Incorrect plugin"
602
if (process_list == NULL){
603
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1067
/* Main loop while running plugins exist */
1069
608
fd_set rfds = rfds_all;
1070
609
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
1071
if(select_ret == -1 and errno != EINTR){
610
if (select_ret == -1){
1072
611
perror("select");
1073
exitstatus = EX_OSERR;
612
exitstatus = EXIT_FAILURE;
1076
615
/* OK, now either a process completed, or something can be read
1077
616
from one of them */
1078
for(plugin *proc = plugin_list; proc != NULL;){
617
for(process *proc = process_list; proc ; proc = proc->next){
1079
618
/* Is this process completely done? */
1080
if(proc->completed and proc->eof){
619
if(proc->eof and proc->completed){
1081
620
/* Only accept the plugin output if it exited cleanly */
1082
621
if(not WIFEXITED(proc->status)
1083
622
or WEXITSTATUS(proc->status) != 0){
1084
623
/* Bad exit by plugin */
1087
625
if(WIFEXITED(proc->status)){
1088
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1089
" status %d\n", proc->name,
1090
(intmax_t) (proc->pid),
626
fprintf(stderr, "Plugin %u exited with status %d\n",
627
(unsigned int) (proc->pid),
1091
628
WEXITSTATUS(proc->status));
1092
} else if(WIFSIGNALED(proc->status)){
1093
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1094
" signal %d: %s\n", proc->name,
1095
(intmax_t) (proc->pid),
1096
WTERMSIG(proc->status),
1097
strsignal(WTERMSIG(proc->status)));
629
} else if(WIFSIGNALED(proc->status)) {
630
fprintf(stderr, "Plugin %u killed by signal %d\n",
631
(unsigned int) (proc->pid),
632
WTERMSIG(proc->status));
1098
633
} else if(WCOREDUMP(proc->status)){
1099
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1100
" core\n", proc->name, (intmax_t) (proc->pid));
634
fprintf(stderr, "Plugin %d dumped core\n",
635
(unsigned int) (proc->pid));
1104
638
/* Remove the plugin */
1105
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
639
FD_CLR(proc->fd, &rfds_all);
1108
640
/* Block signal while modifying process_list */
1109
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1111
&sigchld_action.sa_mask,
641
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1114
643
perror("sigprocmask");
1115
exitstatus = EX_OSERR;
1119
plugin *next_plugin = proc->next;
644
exitstatus = EXIT_FAILURE;
647
/* Delete this process entry from the list */
648
if(process_list == proc){
649
/* First one - simple */
650
process_list = proc->next;
652
/* Second one or later */
653
for(process *p = process_list; p != NULL; p = p->next){
655
p->next = proc->next;
1123
660
/* We are done modifying process list, so unblock signal */
1124
ret = (int)(TEMP_FAILURE_RETRY
1125
(sigprocmask(SIG_UNBLOCK,
1126
&sigchld_action.sa_mask, NULL)));
661
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
1128
664
perror("sigprocmask");
1129
exitstatus = EX_OSERR;
1133
if(plugin_list == NULL){
668
/* We deleted this process from the list, so we can't go
669
proc->next. Therefore, start over from the beginning of
1140
673
/* This process exited nicely, so print its buffer */
1142
bool bret = print_out_password(proc->buffer,
1143
proc->buffer_length);
675
bool bret = print_out_password(proc->buffer, proc->buffer_length);
1145
677
perror("print_out_password");
1146
exitstatus = EX_IOERR;
678
exitstatus = EXIT_FAILURE;
1151
682
/* This process has not completed. Does it have any output? */
1152
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
683
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1155
684
/* This process had nothing to say at this time */
1159
687
/* Before reading, make the process' data buffer large enough */
1160
688
if(proc->buffer_length + BUFFER_SIZE > proc->buffer_size){
1161
689
proc->buffer = realloc(proc->buffer, proc->buffer_size
1162
690
+ (size_t) BUFFER_SIZE);
1163
if(proc->buffer == NULL){
691
if (proc->buffer == NULL){
1164
692
perror("malloc");
1165
exitstatus = EX_OSERR;
693
exitstatus = EXIT_FAILURE;
1168
696
proc->buffer_size += BUFFER_SIZE;
1170
698
/* Read from the process */
1171
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1173
+ proc->buffer_length,
699
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1176
702
/* Read error from this process; ignore the error */
1182
707
proc->eof = true;
1184
proc->buffer_length += (size_t) sret;
709
proc->buffer_length += (size_t) ret;
1192
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1193
and exitstatus != EX_OK)){
1194
/* Fallback if all plugins failed, none are found or an error
717
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
718
/* Fallback if all plugins failed or an error occured */
1197
720
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
1198
721
char *passwordbuffer = getpass("Password: ");
1199
size_t len = strlen(passwordbuffer);
1200
/* Strip trailing newline */
1201
if(len > 0 and passwordbuffer[len-1] == '\n'){
1202
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1205
bret = print_out_password(passwordbuffer, len);
722
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1207
724
perror("print_out_password");
1208
exitstatus = EX_IOERR;
725
exitstatus = EXIT_FAILURE;
1212
730
/* Restore old signal handler */
1213
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1215
perror("sigaction");
1216
exitstatus = EX_OSERR;
1219
if(custom_argv != NULL){
1220
for(char **arg = custom_argv+1; *arg != NULL; arg++){
731
sigaction(SIGCHLD, &old_sigchld_action, NULL);
735
/* Free the plugin list */
736
for(plugin *next; plugin_list != NULL; plugin_list = next){
737
next = plugin_list->next;
738
free(plugin_list->argv);
1226
742
if(dir != NULL){
1230
/* Kill the processes */
1231
for(plugin *p = plugin_list; p != NULL; p = p->next){
1234
ret = kill(p->pid, SIGTERM);
1235
if(ret == -1 and errno != ESRCH){
1236
/* Set-uid proccesses might not get closed */
746
/* Free the process list and kill the processes */
747
for(process *next; process_list != NULL; process_list = next){
748
next = process_list->next;
749
close(process_list->fd);
750
ret = kill(process_list->pid, SIGTERM);
751
if(ret == -1 and errno != ESRCH){
752
/* set-uid proccesses migth not get closed */
755
free(process_list->buffer);
1242
759
/* Wait for any remaining child processes to terminate */
1244
761
ret = wait(NULL);
1245
762
} while(ret >= 0);
1246
763
if(errno != ECHILD){
1255
767
return exitstatus;