37
38
#include <sys/select.h> /* fd_set, select(), FD_ZERO(),
38
39
FD_SET(), FD_ISSET(), FD_CLR */
39
40
#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
41
WEXITSTATUS(), WTERMSIG(),
41
43
#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
42
44
#include <iso646.h> /* and, or, not */
43
#include <dirent.h> /* DIR, struct dirent, opendir(),
45
#include <dirent.h> /* DIR, struct dirent, fdopendir(),
44
46
readdir(), closedir(), dirfd() */
45
47
#include <unistd.h> /* struct stat, stat(), S_ISREG(),
46
48
fcntl(), setuid(), setgid(),
47
49
F_GETFD, F_SETFD, FD_CLOEXEC,
48
50
access(), pipe(), fork(), close()
49
dup2, STDOUT_FILENO, _exit(),
50
execv(), write(), read(),
51
dup2(), STDOUT_FILENO, _exit(),
52
execve(), write(), read(),
52
54
#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
54
#include <string.h> /* strsep, strlen(), asprintf() */
56
#include <string.h> /* strsep, strlen(), asprintf(),
57
strsignal(), strcmp(), strncmp() */
55
58
#include <errno.h> /* errno */
56
59
#include <argp.h> /* struct argp_option, struct
57
60
argp_state, struct argp,
58
61
argp_parse(), ARGP_ERR_UNKNOWN,
59
ARGP_KEY_END, ARGP_KEY_ARG, error_t */
62
ARGP_KEY_END, ARGP_KEY_ARG,
60
64
#include <signal.h> /* struct sigaction, sigemptyset(),
61
65
sigaddset(), sigaction(),
62
66
sigprocmask(), SIG_BLOCK, SIGCHLD,
63
SIG_UNBLOCK, kill() */
67
SIG_UNBLOCK, kill(), sig_atomic_t
64
69
#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 */
73
#include <errno.h> /* errno */
74
#include <error.h> /* error() */
66
76
#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>";
74
typedef struct process{
78
#define PDIR "/lib/mandos/plugins.d"
79
#define AFILE "/conf/conf.d/mandos/plugin-runner.conf"
81
const char *argp_program_version = "plugin-runner " VERSION;
82
const char *argp_program_bug_address = "<mandos@recompile.se>";
86
84
typedef struct plugin{
87
85
char *name; /* can be NULL or any plugin name */
92
/* Variables used for running processes*/
99
volatile sig_atomic_t completed;
93
101
struct plugin *next;
96
static plugin *getplugin(char *name, plugin **plugin_list){
97
for (plugin *p = *plugin_list; p != NULL; p = p->next){
99
or (p->name and name and (strcmp(p->name, name) == 0))){
104
static plugin *plugin_list = NULL;
106
/* Gets an existing plugin based on name,
107
or if none is found, creates a new one */
108
__attribute__((warn_unused_result))
109
static plugin *getplugin(char *name){
110
/* Check for existing plugin with that name */
111
for(plugin *p = plugin_list; p != NULL; p = p->next){
113
or (p->name and name and (strcmp(p->name, name) == 0))){
103
117
/* Create a new plugin */
104
plugin *new_plugin = malloc(sizeof(plugin));
105
if (new_plugin == NULL){
118
plugin *new_plugin = NULL;
120
new_plugin = malloc(sizeof(plugin));
121
} while(new_plugin == NULL and errno == EINTR);
122
if(new_plugin == NULL){
108
*new_plugin = (plugin) { .name = name,
112
.next = *plugin_list };
114
new_plugin->argv = malloc(sizeof(char *) * 2);
115
if (new_plugin->argv == NULL){
125
char *copy_name = NULL;
128
copy_name = strdup(name);
129
} while(copy_name == NULL and errno == EINTR);
130
if(copy_name == NULL){
138
*new_plugin = (plugin){ .name = copy_name,
141
.next = plugin_list };
144
new_plugin->argv = malloc(sizeof(char *) * 2);
145
} while(new_plugin->argv == NULL and errno == EINTR);
146
if(new_plugin->argv == NULL){
116
149
free(new_plugin);
119
new_plugin->argv[0] = name;
153
new_plugin->argv[0] = copy_name;
120
154
new_plugin->argv[1] = NULL;
122
new_plugin->environ = malloc(sizeof(char *));
157
new_plugin->environ = malloc(sizeof(char *));
158
} while(new_plugin->environ == NULL and errno == EINTR);
123
159
if(new_plugin->environ == NULL){
124
162
free(new_plugin->argv);
125
163
free(new_plugin);
128
167
new_plugin->environ[0] = NULL;
129
169
/* Append the new plugin to the list */
130
*plugin_list = new_plugin;
170
plugin_list = new_plugin;
131
171
return new_plugin;
134
174
/* Helper function for add_argument and add_environment */
175
__attribute__((nonnull, warn_unused_result))
135
176
static bool add_to_char_array(const char *new, char ***array,
137
178
/* Resize the pointed-to array to hold one more pointer */
138
*array = realloc(*array, sizeof(char *)
139
* (size_t) ((*len) + 2));
179
char **new_array = NULL;
181
new_array = realloc(*array, sizeof(char *)
182
* (size_t) ((*len) + 2));
183
} while(new_array == NULL and errno == EINTR);
140
184
/* Malloc check */
185
if(new_array == NULL){
144
189
/* Make a copy of the new string */
145
char *copy = strdup(new);
193
} while(copy == NULL and errno == EINTR);
146
194
if(copy == NULL){
165
214
/* Add to a plugin's environment */
166
static bool add_environment(plugin *p, const char *def){
215
__attribute__((nonnull(2), warn_unused_result))
216
static bool add_environment(plugin *p, const char *def, bool replace){
220
/* namelen = length of name of environment variable */
221
size_t namelen = (size_t)(strchrnul(def, '=') - def);
222
/* Search for this environment variable */
223
for(char **envdef = p->environ; *envdef != NULL; envdef++){
224
if(strncmp(*envdef, def, namelen + 1) == 0){
225
/* It already exists */
229
new_envdef = realloc(*envdef, strlen(def) + 1);
230
} while(new_envdef == NULL and errno == EINTR);
231
if(new_envdef == NULL){
234
*envdef = new_envdef;
235
strcpy(*envdef, def);
170
240
return add_to_char_array(def, &(p->environ), &(p->envc));
175
244
* Based on the example in the GNU LibC manual chapter 13.13 "File
176
245
* Descriptor Flags".
177
* *Note File Descriptor Flags:(libc)Descriptor Flags.
246
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
179
static int set_cloexec_flag(int fd)
181
int ret = fcntl(fd, F_GETFD, 0);
248
__attribute__((warn_unused_result))
249
static int set_cloexec_flag(int fd){
250
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
182
251
/* If reading the flags failed, return error indication now. */
186
255
/* Store modified flag word in the descriptor. */
187
return fcntl(fd, F_SETFD, ret | FD_CLOEXEC);
256
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
190
process *process_list = NULL;
192
/* Mark a process as completed when it exits, and save its exit
261
/* Mark processes as completed when they exit, and save their 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;
263
static void handle_sigchld(__attribute__((unused)) int sig){
264
int old_errno = errno;
266
plugin *proc = plugin_list;
268
pid_t pid = waitpid(-1, &status, WNOHANG);
270
/* Only still running child processes */
275
/* No child processes */
278
error(0, errno, "waitpid");
281
/* A child exited, find it in process_list */
282
while(proc != NULL and proc->pid != pid){
286
/* Process not found in process list */
289
proc->status = status;
213
bool print_out_password(const char *buffer, size_t length){
295
/* Prints out a password to stdout */
296
__attribute__((nonnull, warn_unused_result))
297
static bool print_out_password(const char *buffer, size_t length){
215
if(length>0 and buffer[length-1] == '\n'){
218
299
for(size_t written = 0; written < length; written += (size_t)ret){
219
300
ret = TEMP_FAILURE_RETRY(write(STDOUT_FILENO, buffer + written,
220
301
length - written));
284
384
{ .name = "global-options", .key = 'g',
285
385
.arg = "OPTION[,OPTION[,...]]",
286
386
.doc = "Options passed to all plugins" },
287
{ .name = "global-envs", .key = 'e',
387
{ .name = "global-env", .key = 'G',
288
388
.arg = "VAR=value",
289
389
.doc = "Environment variable passed to all plugins" },
290
390
{ .name = "options-for", .key = 'o',
291
391
.arg = "PLUGIN:OPTION[,OPTION[,...]]",
292
392
.doc = "Options passed only to specified plugin" },
293
{ .name = "envs-for", .key = 'f',
393
{ .name = "env-for", .key = 'E',
294
394
.arg = "PLUGIN:ENV=value",
295
395
.doc = "Environment variable passed to specified plugin" },
296
396
{ .name = "disable", .key = 'd',
298
398
.doc = "Disable a specific plugin", .group = 1 },
399
{ .name = "enable", .key = 'e',
401
.doc = "Enable a specific plugin", .group = 1 },
299
402
{ .name = "plugin-dir", .key = 128,
300
403
.arg = "DIRECTORY",
301
404
.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 },
405
{ .name = "config-file", .key = 129,
407
.doc = "Specify a different configuration file", .group = 2 },
408
{ .name = "userid", .key = 130,
409
.arg = "ID", .flags = 0,
410
.doc = "User ID the plugins will run as", .group = 3 },
411
{ .name = "groupid", .key = 131,
412
.arg = "ID", .flags = 0,
413
.doc = "Group ID the plugins will run as", .group = 3 },
414
{ .name = "debug", .key = 132,
415
.doc = "Debug mode", .group = 4 },
417
* These reproduce what we would get without ARGP_NO_HELP
419
{ .name = "help", .key = '?',
420
.doc = "Give this help list", .group = -1 },
421
{ .name = "usage", .key = -3,
422
.doc = "Give a short usage message", .group = -1 },
423
{ .name = "version", .key = 'V',
424
.doc = "Print program version", .group = -1 },
313
error_t parse_opt (int key, char *arg, struct argp_state *state) {
314
/* Get the INPUT argument from `argp_parse', which we know is a
315
pointer to our plugin list pointer. */
316
plugin **plugins = state->input;
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");
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;
428
__attribute__((nonnull(3)))
429
error_t parse_opt(int key, char *arg, struct argp_state *state){
434
case 'g': /* --global-options */
437
while((plugin_option = strsep(&arg, ",")) != NULL){
438
if(not add_argument(getplugin(NULL), plugin_option)){
445
case 'G': /* --global-env */
446
if(add_environment(getplugin(NULL), arg, true)){
450
case 'o': /* --options-for */
452
char *option_list = strchr(arg, ':');
453
if(option_list == NULL){
454
argp_error(state, "No colon in \"%s\"", arg);
461
argp_error(state, "Empty plugin name");
466
while((option = strsep(&option_list, ",")) != NULL){
467
if(not add_argument(getplugin(arg), option)){
474
case 'E': /* --env-for */
375
476
char *envdef = strchr(arg, ':');
376
477
if(envdef == NULL){
379
char *p_name = strndup(arg, (size_t) (envdef-arg));
478
argp_error(state, "No colon in \"%s\"", arg);
384
if(not add_environment(getplugin(p_name, plugins), envdef)){
385
perror("add_environment");
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);
485
argp_error(state, "Empty plugin name");
489
if(add_environment(getplugin(arg), envdef, true)){
494
case 'd': /* --disable */
496
plugin *p = getplugin(arg);
503
case 'e': /* --enable */
505
plugin *p = getplugin(arg);
512
case 128: /* --plugin-dir */
514
plugindir = strdup(arg);
515
if(plugindir != NULL){
519
case 129: /* --config-file */
520
/* This is already done by parse_opt_config_file() */
522
case 130: /* --userid */
523
tmp_id = strtoimax(arg, &tmp, 10);
524
if(errno != 0 or tmp == arg or *tmp != '\0'
525
or tmp_id != (uid_t)tmp_id){
526
argp_error(state, "Bad user ID number: \"%s\", using %"
527
PRIdMAX, arg, (intmax_t)uid);
533
case 131: /* --groupid */
534
tmp_id = strtoimax(arg, &tmp, 10);
535
if(errno != 0 or tmp == arg or *tmp != '\0'
536
or tmp_id != (gid_t)tmp_id){
537
argp_error(state, "Bad group ID number: \"%s\", using %"
538
PRIdMAX, arg, (intmax_t)gid);
544
case 132: /* --debug */
411
fprintf(stderr, "Ignoring unknown argument \"%s\"\n", arg);
416
return ARGP_ERR_UNKNOWN;
421
plugin *plugin_list = NULL;
423
struct argp argp = { .options = options, .parser = parse_opt,
424
.args_doc = "[+PLUS_SEPARATED_OPTIONS]",
548
* These reproduce what we would get without ARGP_NO_HELP
550
case '?': /* --help */
551
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
552
argp_state_help(state, state->out_stream, ARGP_HELP_STD_HELP);
553
case -3: /* --usage */
554
state->flags &= ~(unsigned int)ARGP_NO_EXIT; /* force exit */
555
argp_state_help(state, state->out_stream,
556
ARGP_HELP_USAGE | ARGP_HELP_EXIT_OK);
557
case 'V': /* --version */
558
fprintf(state->out_stream, "%s\n", argp_program_version);
562
* When adding more options before this line, remember to also add a
563
* "case" to the "parse_opt_config_file" function below.
566
/* Cryptsetup always passes an argument, which is an empty
567
string if "none" was specified in /etc/crypttab. So if
568
argument was empty, we ignore it silently. */
573
return ARGP_ERR_UNKNOWN;
575
return errno; /* Set to 0 at start */
578
/* This option parser is the same as parse_opt() above, except it
579
ignores everything but the --config-file option. */
580
error_t parse_opt_config_file(int key, char *arg,
581
__attribute__((unused))
582
struct argp_state *state){
585
case 'g': /* --global-options */
586
case 'G': /* --global-env */
587
case 'o': /* --options-for */
588
case 'E': /* --env-for */
589
case 'd': /* --disable */
590
case 'e': /* --enable */
591
case 128: /* --plugin-dir */
593
case 129: /* --config-file */
595
argfile = strdup(arg);
600
case 130: /* --userid */
601
case 131: /* --groupid */
602
case 132: /* --debug */
603
case '?': /* --help */
604
case -3: /* --usage */
605
case 'V': /* --version */
609
return ARGP_ERR_UNKNOWN;
614
struct argp argp = { .options = options,
615
.parser = parse_opt_config_file,
425
617
.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");
619
/* Parse using parse_opt_config_file() in order to get the custom
620
config file location, if any. */
621
ret = argp_parse(&argp, argc, argv,
622
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
630
error(0, errno, "argp_parse");
631
exitstatus = EX_OSERR;
634
exitstatus = EX_USAGE;
638
/* Reset to the normal argument parser */
639
argp.parser = parse_opt;
641
/* Open the configfile if available */
643
conffp = fopen(AFILE, "r");
645
conffp = fopen(argfile, "r");
435
647
if(conffp != NULL){
436
648
char *org_line = NULL;
649
char *p, *arg, *new_arg, *line;
439
char *p, *arg, *new_arg, *line;
440
651
const char whitespace_delims[] = " \r\t\f\v\n";
441
652
const char comment_delim[] = "#";
655
custom_argv = malloc(sizeof(char*) * 2);
656
if(custom_argv == NULL){
657
error(0, errno, "malloc");
658
exitstatus = EX_OSERR;
661
custom_argv[0] = argv[0];
662
custom_argv[1] = NULL;
664
/* for each line in the config file, strip whitespace and ignore
444
667
sret = getline(&org_line, &size, conffp);
450
673
arg = strsep(&line, comment_delim);
451
674
while((p = strsep(&arg, whitespace_delims)) != NULL){
455
678
new_arg = strdup(p);
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;
680
error(0, errno, "strdup");
681
exitstatus = EX_OSERR;
688
char **new_argv = realloc(custom_argv, sizeof(char *)
691
if(new_argv == NULL){
692
error(0, errno, "realloc");
693
exitstatus = EX_OSERR;
698
custom_argv = new_argv;
701
custom_argv[custom_argc-1] = new_arg;
702
custom_argv[custom_argc] = NULL;
706
ret = fclose(conffp);
707
} while(ret == EOF and errno == EINTR);
709
error(0, errno, "fclose");
710
exitstatus = EX_IOERR;
466
715
/* Check for harmful errors and go to fallback. Other errors might
467
716
not affect opening plugins */
468
if (errno == EMFILE or errno == ENFILE or errno == ENOMEM){
470
exitstatus = EXIT_FAILURE;
717
if(errno == EMFILE or errno == ENFILE or errno == ENOMEM){
718
error(0, errno, "fopen");
719
exitstatus = EX_OSERR;
723
/* If there were any arguments from the configuration file, pass
724
them to parser as command line arguments */
475
725
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;
726
ret = argp_parse(&argp, custom_argc, custom_argv,
727
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
735
error(0, errno, "argp_parse");
736
exitstatus = EX_OSERR;
739
exitstatus = EX_CONFIG;
744
/* Parse actual command line arguments, to let them override the
746
ret = argp_parse(&argp, argc, argv,
747
ARGP_IN_ORDER | ARGP_NO_EXIT | ARGP_NO_HELP,
755
error(0, errno, "argp_parse");
756
exitstatus = EX_OSERR;
759
exitstatus = EX_USAGE;
486
764
for(plugin *p = plugin_list; p != NULL; p=p->next){
487
765
fprintf(stderr, "Plugin: %s has %d arguments\n",
489
767
for(char **a = p->argv; *a != NULL; a++){
490
768
fprintf(stderr, "\tArg: %s\n", *a);
492
fprintf(stderr, "...and %u environment variables\n", p->envc);
770
fprintf(stderr, "...and %d environment variables\n", p->envc);
493
771
for(char **a = p->environ; *a != NULL; a++){
494
772
fprintf(stderr, "\t%s\n", *a);
778
/* Work around Debian bug #633582:
779
<http://bugs.debian.org/633582> */
780
int plugindir_fd = open(/* plugindir or */ PDIR, O_RDONLY);
781
if(plugindir_fd == -1){
782
error(0, errno, "open(\"" PDIR "\")");
784
ret = (int)TEMP_FAILURE_RETRY(fstat(plugindir_fd, &st));
786
error(0, errno, "fstat");
788
if(S_ISDIR(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
789
ret = fchown(plugindir_fd, uid, gid);
791
error(0, errno, "fchown");
795
TEMP_FAILURE_RETRY(close(plugindir_fd));
799
/* Lower permissions */
802
error(0, errno, "setgid");
499
804
ret = setuid(uid);
509
dir = opendir(plugindir);
511
perror("Could not open plugin dir");
512
exitstatus = EXIT_FAILURE;
516
/* Set the FD_CLOEXEC flag on the directory, if possible */
806
error(0, errno, "setuid");
809
/* Open plugin directory with close_on_exec flag */
518
int dir_fd = dirfd(dir);
520
ret = set_cloexec_flag(dir_fd);
522
perror("set_cloexec_flag");
523
exitstatus = EXIT_FAILURE;
812
if(plugindir == NULL){
813
dir_fd = open(PDIR, O_RDONLY |
816
#else /* not O_CLOEXEC */
818
#endif /* not O_CLOEXEC */
821
dir_fd = open(plugindir, O_RDONLY |
824
#else /* not O_CLOEXEC */
826
#endif /* not O_CLOEXEC */
830
error(0, errno, "Could not open plugin dir");
831
exitstatus = EX_UNAVAILABLE;
836
/* Set the FD_CLOEXEC flag on the directory */
837
ret = set_cloexec_flag(dir_fd);
839
error(0, errno, "set_cloexec_flag");
840
TEMP_FAILURE_RETRY(close(dir_fd));
841
exitstatus = EX_OSERR;
844
#endif /* O_CLOEXEC */
846
dir = fdopendir(dir_fd);
848
error(0, errno, "Could not open plugin dir");
849
TEMP_FAILURE_RETRY(close(dir_fd));
850
exitstatus = EX_OSERR;
529
855
FD_ZERO(&rfds_all);
857
/* Read and execute any executable in the plugin directory*/
532
dirst = readdir(dir);
860
dirst = readdir(dir);
861
} while(dirst == NULL and errno == EINTR);
534
// All directory entries have been processed
863
/* All directory entries have been processed */
535
864
if(dirst == NULL){
538
exitstatus = EXIT_FAILURE;
866
error(0, errno, "readdir");
867
exitstatus = EX_IOERR;
544
873
d_name_len = strlen(dirst->d_name);
546
// Ignore dotfiles, backup files and other junk
875
/* Ignore dotfiles, backup files and other junk */
548
877
bool bad_name = false;
550
const char const *bad_prefixes[] = { ".", "#", NULL };
879
const char * const bad_prefixes[] = { ".", "#", NULL };
552
const char const *bad_suffixes[] = { "~", "#", ".dpkg-new",
881
const char * const bad_suffixes[] = { "~", "#", ".dpkg-new",
554
884
".dpkg-divert", NULL };
555
for(const char **pre = bad_prefixes; *pre != NULL; pre++){
886
#pragma GCC diagnostic push
887
#pragma GCC diagnostic ignored "-Wcast-qual"
889
for(const char **pre = (const char **)bad_prefixes;
890
*pre != NULL; pre++){
892
#pragma GCC diagnostic pop
556
894
size_t pre_len = strlen(*pre);
557
895
if((d_name_len >= pre_len)
558
896
and strncmp((dirst->d_name), *pre, pre_len) == 0){
646
1000
process, too. */
647
1001
if(p->environ[0] != NULL){
648
1002
for(char **e = environ; *e != NULL; e++){
649
char *copy = strdup(*e);
654
if(not add_environment(p, copy)){
655
perror("add_environment");
1003
if(not add_environment(p, *e, false)){
1004
error(0, errno, "add_environment");
664
exitstatus = EXIT_FAILURE;
1010
ret = (int)TEMP_FAILURE_RETRY(pipe(pipefd));
1012
error(0, errno, "pipe");
1013
exitstatus = EX_OSERR;
1016
/* Ask OS to automatic close the pipe on exec */
667
1017
ret = set_cloexec_flag(pipefd[0]);
669
perror("set_cloexec_flag");
670
exitstatus = EXIT_FAILURE;
1019
error(0, errno, "set_cloexec_flag");
1020
exitstatus = EX_OSERR;
673
1023
ret = set_cloexec_flag(pipefd[1]);
675
perror("set_cloexec_flag");
676
exitstatus = EXIT_FAILURE;
1025
error(0, errno, "set_cloexec_flag");
1026
exitstatus = EX_OSERR;
679
1029
/* Block SIGCHLD until process is safely in process list */
680
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1030
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_BLOCK,
1031
&sigchld_action.sa_mask,
682
perror("sigprocmask");
683
exitstatus = EXIT_FAILURE;
1034
error(0, errno, "sigprocmask");
1035
exitstatus = EX_OSERR;
686
// Starting a new process to be watched
1038
/* Starting a new process to be watched */
1042
} while(pid == -1 and errno == EINTR);
690
exitstatus = EXIT_FAILURE;
1044
error(0, errno, "fork");
1045
exitstatus = EX_OSERR;
694
1049
/* this is the child process */
695
1050
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1052
error(0, errno, "sigaction");
700
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1055
ret = sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
702
perror("sigprocmask");
1057
error(0, errno, "sigprocmask");
706
1061
ret = dup2(pipefd[1], STDOUT_FILENO); /* replace our stdout */
1063
error(0, errno, "dup2");
712
1067
if(dirfd(dir) < 0){
714
1069
above and must now close it manually here. */
717
if(p->environ[0] == NULL){
718
if(execv(filename, p->argv) < 0){
723
if(execve(filename, p->argv, p->environ) < 0){
1072
if(execve(filename, p->argv,
1073
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1074
error(0, errno, "execve for %s", filename);
1079
/* Parent process */
1080
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
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);
1083
plugin *new_plugin = getplugin(dirst->d_name);
1084
if(new_plugin == NULL){
1085
error(0, errno, "getplugin");
1086
ret = (int)(TEMP_FAILURE_RETRY
1087
(sigprocmask(SIG_UNBLOCK, &sigchld_action.sa_mask,
738
perror("sigprocmask");
1090
error(0, errno, "sigprocmask");
740
exitstatus = EXIT_FAILURE;
1092
exitstatus = EX_OSERR;
744
*new_process = (struct process){ .pid = pid,
746
.next = process_list };
748
process_list = new_process;
1096
new_plugin->pid = pid;
1097
new_plugin->fd = pipefd[0];
749
1099
/* Unblock SIGCHLD so signal handler can be run if this process
750
1100
has already completed */
751
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask, NULL);
1101
ret = (int)TEMP_FAILURE_RETRY(sigprocmask(SIG_UNBLOCK,
1102
&sigchld_action.sa_mask,
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++){
1105
error(0, errno, "sigprocmask");
1106
exitstatus = EX_OSERR;
1110
#if defined (__GNUC__) and defined (__GLIBC__)
1111
#if not __GLIBC_PREREQ(2, 16)
1112
#pragma GCC diagnostic push
1113
#pragma GCC diagnostic ignored "-Wsign-conversion"
1116
FD_SET(new_plugin->fd, &rfds_all); /* Spurious warning from
1117
-Wconversion in GNU libc
1119
#if defined (__GNUC__) and defined (__GLIBC__)
1120
#if not __GLIBC_PREREQ(2, 16)
1121
#pragma GCC diagnostic pop
1125
if(maxfd < new_plugin->fd){
1126
maxfd = new_plugin->fd;
1130
TEMP_FAILURE_RETRY(closedir(dir));
781
if (process_list == NULL){
782
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1132
free_plugin(getplugin(NULL));
1134
for(plugin *p = plugin_list; p != NULL; p = p->next){
1138
if(p->next == NULL){
1139
fprintf(stderr, "No plugin processes started. Incorrect plugin"
1145
/* Main loop while running plugins exist */
787
1147
fd_set rfds = rfds_all;
788
1148
int select_ret = select(maxfd+1, &rfds, NULL, NULL, NULL);
789
if (select_ret == -1){
791
exitstatus = EXIT_FAILURE;
1149
if(select_ret == -1 and errno != EINTR){
1150
error(0, errno, "select");
1151
exitstatus = EX_OSERR;
794
1154
/* OK, now either a process completed, or something can be read
795
1155
from one of them */
796
for(process *proc = process_list; proc ; proc = proc->next){
1156
for(plugin *proc = plugin_list; proc != NULL;){
797
1157
/* Is this process completely done? */
798
if(proc->eof and proc->completed){
1158
if(proc->completed and proc->eof){
799
1159
/* Only accept the plugin output if it exited cleanly */
800
1160
if(not WIFEXITED(proc->status)
801
1161
or WEXITSTATUS(proc->status) != 0){
802
1162
/* Bad exit by plugin */
804
1165
if(WIFEXITED(proc->status)){
805
fprintf(stderr, "Plugin %u exited with status %d\n",
806
(unsigned int) (proc->pid),
1166
fprintf(stderr, "Plugin %s [%" PRIdMAX "] exited with"
1167
" status %d\n", proc->name,
1168
(intmax_t) (proc->pid),
807
1169
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));
1170
} else if(WIFSIGNALED(proc->status)){
1171
fprintf(stderr, "Plugin %s [%" PRIdMAX "] killed by"
1172
" signal %d: %s\n", proc->name,
1173
(intmax_t) (proc->pid),
1174
WTERMSIG(proc->status),
1175
strsignal(WTERMSIG(proc->status)));
812
1176
} else if(WCOREDUMP(proc->status)){
813
fprintf(stderr, "Plugin %d dumped core\n",
814
(unsigned int) (proc->pid));
1177
fprintf(stderr, "Plugin %s [%" PRIdMAX "] dumped"
1178
" core\n", proc->name, (intmax_t) (proc->pid));
817
1182
/* Remove the plugin */
818
FD_CLR(proc->fd, &rfds_all);
1183
#if defined (__GNUC__) and defined (__GLIBC__)
1184
#if not __GLIBC_PREREQ(2, 16)
1185
#pragma GCC diagnostic push
1186
#pragma GCC diagnostic ignored "-Wsign-conversion"
1189
FD_CLR(proc->fd, &rfds_all); /* Spurious warning from
1190
-Wconversion in GNU libc
1192
#if defined (__GNUC__) and defined (__GLIBC__)
1193
#if not __GLIBC_PREREQ(2, 16)
1194
#pragma GCC diagnostic pop
819
1198
/* Block signal while modifying process_list */
820
ret = sigprocmask (SIG_BLOCK, &sigchld_action.sa_mask, NULL);
1199
ret = (int)TEMP_FAILURE_RETRY(sigprocmask
1201
&sigchld_action.sa_mask,
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;
1204
error(0, errno, "sigprocmask");
1205
exitstatus = EX_OSERR;
1209
plugin *next_plugin = proc->next;
839
1213
/* We are done modifying process list, so unblock signal */
840
ret = sigprocmask (SIG_UNBLOCK, &sigchld_action.sa_mask,
1214
ret = (int)(TEMP_FAILURE_RETRY
1215
(sigprocmask(SIG_UNBLOCK,
1216
&sigchld_action.sa_mask, NULL)));
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
1218
error(0, errno, "sigprocmask");
1219
exitstatus = EX_OSERR;
1223
if(plugin_list == NULL){
852
1230
/* This process exited nicely, so print its buffer */
854
bool bret = print_out_password(proc->buffer, proc->buffer_length);
1232
bool bret = print_out_password(proc->buffer,
1233
proc->buffer_length);
856
perror("print_out_password");
857
exitstatus = EXIT_FAILURE;
1235
error(0, errno, "print_out_password");
1236
exitstatus = EX_IOERR;
861
1241
/* This process has not completed. Does it have any output? */
862
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){
1242
#if defined (__GNUC__) and defined (__GLIBC__)
1243
#if not __GLIBC_PREREQ(2, 16)
1244
#pragma GCC diagnostic push
1245
#pragma GCC diagnostic ignored "-Wsign-conversion"
1248
if(proc->eof or not FD_ISSET(proc->fd, &rfds)){ /* Spurious
1254
#if defined (__GNUC__) and defined (__GLIBC__)
1255
#if not __GLIBC_PREREQ(2, 16)
1256
#pragma GCC diagnostic pop
863
1259
/* This process had nothing to say at this time */
866
1263
/* Before reading, make the process' data buffer large enough */
867
1264
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;
1265
char *new_buffer = realloc(proc->buffer, proc->buffer_size
1266
+ (size_t) BUFFER_SIZE);
1267
if(new_buffer == NULL){
1268
error(0, errno, "malloc");
1269
exitstatus = EX_OSERR;
1272
proc->buffer = new_buffer;
875
1273
proc->buffer_size += BUFFER_SIZE;
877
1275
/* Read from the process */
878
ret = read(proc->fd, proc->buffer + proc->buffer_length,
1276
sret = TEMP_FAILURE_RETRY(read(proc->fd,
1278
+ proc->buffer_length,
881
1281
/* Read error from this process; ignore the error */
886
1287
proc->eof = true;
888
proc->buffer_length += (size_t) ret;
1289
proc->buffer_length += (size_t) sret;
896
if(process_list == NULL or exitstatus != EXIT_SUCCESS){
897
/* Fallback if all plugins failed, none are found or an error occured */
1297
if(plugin_list == NULL or (exitstatus != EXIT_SUCCESS
1298
and exitstatus != EX_OK)){
1299
/* Fallback if all plugins failed, none are found or an error
899
1302
fprintf(stderr, "Going to fallback mode using getpass(3)\n");
900
1303
char *passwordbuffer = getpass("Password: ");
901
bret = print_out_password(passwordbuffer, strlen(passwordbuffer));
1304
size_t len = strlen(passwordbuffer);
1305
/* Strip trailing newline */
1306
if(len > 0 and passwordbuffer[len-1] == '\n'){
1307
passwordbuffer[len-1] = '\0'; /* not strictly necessary */
1310
bret = print_out_password(passwordbuffer, len);
903
perror("print_out_password");
904
exitstatus = EXIT_FAILURE;
1312
error(0, errno, "print_out_password");
1313
exitstatus = EX_IOERR;
909
1317
/* 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++){
1318
ret = sigaction(SIGCHLD, &old_sigchld_action, NULL);
1320
error(0, errno, "sigaction");
1321
exitstatus = EX_OSERR;
1324
if(custom_argv != NULL){
1325
for(char **arg = custom_argv+1; *arg != NULL; arg++){
923
free(plugin_list->environ);
927
1331
if(dir != NULL){
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 */
1335
/* Kill the processes */
1336
for(plugin *p = plugin_list; p != NULL; p = p->next){
1339
ret = kill(p->pid, SIGTERM);
1340
if(ret == -1 and errno != ESRCH){
1341
/* Set-uid proccesses might not get closed */
1342
error(0, errno, "kill");
940
free(process_list->buffer);
944
1347
/* Wait for any remaining child processes to terminate */
946
1349
ret = wait(NULL);
947
1350
} while(ret >= 0);
948
1351
if(errno != ECHILD){
1352
error(0, errno, "wait");
952
1360
return exitstatus;