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#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), getline(),
26
asprintf(), O_CLOEXEC */
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27
#include <stddef.h> /* size_t, NULL */
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#include <stdlib.h> /* malloc(), exit(), EXIT_SUCCESS,
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#include <stdbool.h> /* bool, true, false */
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#include <stdio.h> /* fileno(), fprintf(),
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stderr, STDOUT_FILENO, fclose() */
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#include <sys/types.h> /* DIR, fdopendir(), fstat(), struct
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stderr, STDOUT_FILENO */
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#include <sys/types.h> /* DIR, fdopendir(), stat(), struct
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stat, waitpid(), WIFEXITED(),
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WEXITSTATUS(), wait(), pid_t,
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uid_t, gid_t, getuid(), getgid(),
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#include <sys/wait.h> /* wait(), waitpid(), WIFEXITED(),
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WEXITSTATUS(), WTERMSIG(),
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#include <sys/stat.h> /* struct stat, fstat(), S_ISREG() */
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#include <sys/stat.h> /* struct stat, stat(), S_ISREG() */
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#include <iso646.h> /* and, or, not */
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#include <dirent.h> /* DIR, struct dirent, fdopendir(),
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readdir(), closedir(), dirfd() */
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#include <unistd.h> /* fcntl(), F_GETFD, F_SETFD,
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FD_CLOEXEC, write(), STDOUT_FILENO,
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struct stat, fstat(), close(),
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setgid(), setuid(), S_ISREG(),
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faccessat() pipe(), fork(),
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_exit(), dup2(), fexecve(), read()
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#include <unistd.h> /* struct stat, stat(), S_ISREG(),
48
fcntl(), setuid(), setgid(),
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F_GETFD, F_SETFD, FD_CLOEXEC,
50
access(), pipe(), fork(), close()
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dup2(), STDOUT_FILENO, _exit(),
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execv(), write(), read(),
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#include <fcntl.h> /* fcntl(), F_GETFD, F_SETFD,
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FD_CLOEXEC, openat() */
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#include <string.h> /* strsep, strlen(), strsignal(),
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strcmp(), strncmp() */
56
#include <string.h> /* strsep, strlen(), asprintf(),
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strsignal(), strcmp(), strncmp() */
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#include <errno.h> /* errno */
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#include <argp.h> /* struct argp_option, struct
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argp_state, struct argp,
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791
/* Open plugin directory with close_on_exec flag */
814
dir_fd = open(plugindir != NULL ? plugindir : PDIR, O_RDONLY |
817
#else /* not O_CLOEXEC */
819
#endif /* not O_CLOEXEC */
794
if(plugindir == NULL){
795
dir_fd = open(PDIR, O_RDONLY |
798
#else /* not O_CLOEXEC */
800
#endif /* not O_CLOEXEC */
803
dir_fd = open(plugindir, O_RDONLY |
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#else /* not O_CLOEXEC */
808
#endif /* not O_CLOEXEC */
821
811
if(dir_fd == -1){
822
812
error(0, errno, "Could not open plugin dir");
823
813
exitstatus = EX_UNAVAILABLE;
927
int plugin_fd = openat(dir_fd, dirst->d_name, O_RDONLY |
930
#else /* not O_CLOEXEC */
932
#endif /* not O_CLOEXEC */
935
error(0, errno, "Could not open plugin");
918
if(plugindir == NULL){
919
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, PDIR "/%s",
922
ret = (int)TEMP_FAILURE_RETRY(asprintf(&filename, "%s/%s",
939
/* Set the FD_CLOEXEC flag on the plugin FD */
940
ret = set_cloexec_flag(plugin_fd);
942
error(0, errno, "set_cloexec_flag");
943
TEMP_FAILURE_RETRY(close(plugin_fd));
927
error(0, errno, "asprintf");
946
#endif /* O_CLOEXEC */
947
ret = (int)TEMP_FAILURE_RETRY(fstat(plugin_fd, &st));
931
ret = (int)TEMP_FAILURE_RETRY(stat(filename, &st));
949
933
error(0, errno, "stat");
950
TEMP_FAILURE_RETRY(close(plugin_fd));
954
938
/* Ignore non-executable files */
955
939
if(not S_ISREG(st.st_mode)
956
or (TEMP_FAILURE_RETRY(faccessat(dir_fd, dirst->d_name, X_OK,
940
or (TEMP_FAILURE_RETRY(access(filename, X_OK)) != 0)){
959
fprintf(stderr, "Ignoring plugin dir entry \"%s/%s\""
960
" with bad type or mode\n",
961
plugindir != NULL ? plugindir : PDIR, dirst->d_name);
942
fprintf(stderr, "Ignoring plugin dir entry \"%s\""
943
" with bad type or mode\n", filename);
963
TEMP_FAILURE_RETRY(close(plugin_fd));
967
949
plugin *p = getplugin(dirst->d_name);
969
951
error(0, errno, "getplugin");
970
TEMP_FAILURE_RETRY(close(plugin_fd));
998
/* If this plugin has any environment variables, we need to
999
duplicate the environment from this process, too. */
980
/* If this plugin has any environment variables, we will call
981
using execve and need to duplicate the environment from this
1000
983
if(p->environ[0] != NULL){
1001
984
for(char **e = environ; *e != NULL; e++){
1002
985
if(not add_environment(p, *e, false)){
1068
1051
above and must now close it manually here. */
1071
if(fexecve(plugin_fd, p->argv,
1072
(p->environ[0] != NULL) ? p->environ : environ) < 0){
1073
error(0, errno, "fexecve for %s/%s",
1074
plugindir != NULL ? plugindir : PDIR, dirst->d_name);
1054
if(p->environ[0] == NULL){
1055
if(execv(filename, p->argv) < 0){
1056
error(0, errno, "execv for %s", filename);
1060
if(execve(filename, p->argv, p->environ) < 0){
1061
error(0, errno, "execve for %s", filename);
1077
1065
/* no return */
1079
1067
/* Parent process */
1080
1068
TEMP_FAILURE_RETRY(close(pipefd[1])); /* Close unused write end of
1082
TEMP_FAILURE_RETRY(close(plugin_fd));
1083
1071
plugin *new_plugin = getplugin(dirst->d_name);
1084
1072
if(new_plugin == NULL){
1085
1073
error(0, errno, "getplugin");