mirror of
https://github.com/SELinuxProject/selinux
synced 2024-12-21 21:50:00 +00:00
d0e16077d4
Do not leak memory if the program argument `l` got passed more than once. Found by clang-analyzer. Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include <selinux/selinux.h>
|
|
#include <selinux/get_context_list.h>
|
|
|
|
static __attribute__ ((__noreturn__)) void usage(const char *name, const char *detail, int rc)
|
|
{
|
|
fprintf(stderr, "usage: %s [-l level] user [context]\n", name);
|
|
if (detail)
|
|
fprintf(stderr, "%s: %s\n", name, detail);
|
|
exit(rc);
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
char **list, *cur_context = NULL;
|
|
char *user = NULL, *level = NULL;
|
|
int ret, i, opt;
|
|
|
|
while ((opt = getopt(argc, argv, "l:")) > 0) {
|
|
switch (opt) {
|
|
case 'l':
|
|
free(level);
|
|
level = strdup(optarg);
|
|
if (!level) {
|
|
fprintf(stderr, "memory allocation failure: %d(%s)\n",
|
|
errno, strerror(errno));
|
|
return 3;
|
|
}
|
|
break;
|
|
default:
|
|
usage(argv[0], "invalid option", 1);
|
|
}
|
|
}
|
|
|
|
if (((argc - optind) < 1) || ((argc - optind) > 2))
|
|
usage(argv[0], "invalid number of arguments", 2);
|
|
|
|
/* If selinux isn't available, bail out. */
|
|
if (!is_selinux_enabled()) {
|
|
fprintf(stderr,
|
|
"getconlist may be used only on a SELinux kernel.\n");
|
|
free(level);
|
|
return 1;
|
|
}
|
|
|
|
user = argv[optind];
|
|
|
|
/* If a context wasn't passed, use the current context. */
|
|
if (((argc - optind) < 2)) {
|
|
if (getcon(&cur_context) < 0) {
|
|
fprintf(stderr, "Couldn't get current context.\n");
|
|
free(level);
|
|
return 2;
|
|
}
|
|
} else {
|
|
cur_context = argv[optind + 1];
|
|
if (security_check_context(cur_context) != 0) {
|
|
fprintf(stderr, "Given context '%s' is invalid.\n", cur_context);
|
|
free(level);
|
|
return 3;
|
|
}
|
|
}
|
|
|
|
/* Get the list and print it */
|
|
if (level)
|
|
ret =
|
|
get_ordered_context_list_with_level(user, level,
|
|
cur_context, &list);
|
|
else
|
|
ret = get_ordered_context_list(user, cur_context, &list);
|
|
if (ret != -1) {
|
|
for (i = 0; list[i]; i++)
|
|
puts(list[i]);
|
|
freeconary(list);
|
|
} else {
|
|
fprintf(stderr, "get_ordered_context_list%s failure: %d(%s)\n",
|
|
level ? "_with_level" : "", errno, strerror(errno));
|
|
free(level);
|
|
return 4;
|
|
}
|
|
|
|
free(level);
|
|
|
|
return 0;
|
|
}
|