2006-09-27 23:07:15 -07:00
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#include "config.h"
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2006-09-03 01:51:32 -07:00
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/types.h>
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2011-05-16 03:33:57 -07:00
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#include <sys/stat.h>
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2006-09-03 01:51:32 -07:00
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#include <pwd.h>
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#include <grp.h>
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#include <fnmatch.h>
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2006-12-14 11:27:46 -08:00
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#include <ctype.h>
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2006-09-27 23:07:15 -07:00
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#ifdef HAVE_ALLOCA_H
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#include <alloca.h>
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#endif
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2008-12-07 17:39:33 -08:00
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#include <Eina.h>
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2006-09-03 01:51:32 -07:00
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/* local subsystem functions */
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2011-05-15 15:11:30 -07:00
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static int auth_action_ok(char *a,
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uid_t uid,
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gid_t gid,
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gid_t *gl,
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int gn,
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gid_t egid);
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static int auth_etc_enlightenment_sysactions(char *a,
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char *u,
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char **g);
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static char *get_word(char *s,
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char *d);
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2006-09-03 01:51:32 -07:00
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/* local subsystem globals */
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2008-12-17 07:33:43 -08:00
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static Eina_Hash *actions = NULL;
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2006-09-03 01:51:32 -07:00
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/* externally accessible functions */
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int
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2011-05-15 15:11:30 -07:00
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main(int argc,
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char **argv)
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2006-09-03 01:51:32 -07:00
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{
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2006-09-27 23:35:43 -07:00
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int i, gn;
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2006-09-03 01:51:32 -07:00
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int test = 0;
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2011-05-15 16:47:42 -07:00
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Eina_Bool mnt = EINA_FALSE;
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2006-09-03 01:51:32 -07:00
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char *action, *cmd;
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2006-09-03 16:09:14 -07:00
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uid_t uid;
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2010-10-21 08:04:48 -07:00
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gid_t gid, gl[65536], egid;
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2006-09-03 01:51:32 -07:00
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for (i = 1; i < argc; i++)
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{
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2011-05-15 15:11:30 -07:00
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if ((!strcmp(argv[i], "-h")) ||
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(!strcmp(argv[i], "-help")) ||
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(!strcmp(argv[i], "--help")))
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{
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printf(
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"This is an internal tool for Enlightenment.\n"
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"do not use it.\n"
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);
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exit(0);
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}
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2006-09-03 01:51:32 -07:00
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}
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2011-05-15 16:47:42 -07:00
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if (argc >= 3)
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2006-09-03 01:51:32 -07:00
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{
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2011-05-15 16:47:42 -07:00
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if ((argc == 3) && (!strcmp(argv[1], "-t")))
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{
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test = 1;
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action = argv[2];
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}
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else
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{
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const char *s;
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s = strrchr(argv[1], '/');
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if ((!s) || (!(++s))) exit(1); /* eeze always uses complete path */
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if (strcmp(s, "mount") && strcmp(s, "umount")) exit(1);
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mnt = EINA_TRUE;
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action = argv[1];
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}
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2006-09-03 01:51:32 -07:00
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}
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else if (argc == 2)
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{
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2011-05-15 15:11:30 -07:00
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action = argv[1];
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2006-09-03 01:51:32 -07:00
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}
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else
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{
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2011-05-15 15:11:30 -07:00
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exit(1);
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2006-09-03 01:51:32 -07:00
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}
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2006-09-03 02:35:28 -07:00
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2006-09-03 16:09:14 -07:00
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uid = getuid();
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gid = getgid();
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2006-09-27 23:35:43 -07:00
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egid = getegid();
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2010-10-21 08:04:48 -07:00
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gn = getgroups(65536, gl);
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if (gn < 0)
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{
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2011-05-15 15:11:30 -07:00
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printf("ERROR: MEMBER OF MORE THAN 65536 GROUPS\n");
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exit(3);
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2010-10-21 08:04:48 -07:00
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}
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2006-09-03 16:09:14 -07:00
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if (setuid(0) != 0)
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2006-09-03 02:35:28 -07:00
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{
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2011-05-15 15:17:15 -07:00
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printf("ERROR: UNABLE TO ASSUME ROOT PRIVILEGES\n");
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2011-05-15 15:11:30 -07:00
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exit(5);
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2006-09-03 02:35:28 -07:00
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}
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2006-09-03 16:09:14 -07:00
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if (setgid(0) != 0)
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{
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2011-05-15 15:17:15 -07:00
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printf("ERROR: UNABLE TO ASSUME ROOT GROUP PRIVILEGES\n");
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2011-05-15 15:11:30 -07:00
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exit(7);
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2006-09-03 16:09:14 -07:00
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}
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2011-05-15 15:11:30 -07:00
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2008-12-07 17:39:33 -08:00
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eina_init();
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2006-09-03 01:51:32 -07:00
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2006-09-27 23:35:43 -07:00
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if (!auth_action_ok(action, uid, gid, gl, gn, egid))
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2006-09-03 01:51:32 -07:00
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{
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2011-05-15 15:11:30 -07:00
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printf("ERROR: ACTION NOT ALLOWED: %s\n", action);
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exit(10);
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2006-09-03 01:51:32 -07:00
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}
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/* we can add more levels of auth here */
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2011-05-15 15:11:30 -07:00
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2011-05-15 16:47:42 -07:00
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/* when mounting, this will match the exact path to the exe,
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* as required in sysactions.conf
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* this is intentionally pedantic for security
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*/
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2008-12-07 17:39:33 -08:00
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cmd = eina_hash_find(actions, action);
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2006-09-03 01:51:32 -07:00
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if (!cmd)
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{
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2011-05-15 15:11:30 -07:00
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printf("ERROR: UNDEFINED ACTION: %s\n", action);
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exit(20);
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2006-09-03 01:51:32 -07:00
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}
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2011-05-15 16:47:42 -07:00
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if ((!test) && (!mnt)) return system(cmd);
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if (mnt)
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{
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Eina_Strbuf *buf;
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2011-05-16 03:33:57 -07:00
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int ret;
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const char *mp;
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2011-05-15 15:11:30 -07:00
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2011-05-15 16:47:42 -07:00
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buf = eina_strbuf_new();
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if (!buf) goto err;
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for (i = 1; i < argc; i++)
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2011-05-16 03:33:57 -07:00
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{
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if (!strncmp(argv[i], "/media/", 7))
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{
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mp = argv[i];
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if (!strcmp(action, "mount"))
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{
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struct stat s;
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if (stat("/media", &s))
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{
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mode_t um;
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um = umask(0);
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if (mkdir("/media", S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH))
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{
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printf("ERROR: COULD NOT CREATE DIRECTORY /media\n");
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exit(40);
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}
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umask(um);
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}
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else if (!S_ISDIR(s.st_mode))
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{
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printf("ERROR: NOT A DIRECTORY: /media\n");
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exit(40);
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}
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if (stat(argv[i], &s))
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{
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mode_t um;
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um = umask(0);
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if (mkdir(argv[i], S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH))
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{
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printf("ERROR: COULD NOT CREATE DIRECTORY %s\n", argv[i]);
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exit(40);
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}
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umask(um);
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}
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else if (!S_ISDIR(s.st_mode))
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{
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printf("ERROR: NOT A DIRECTORY: %s\n", argv[i]);
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exit(40);
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}
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}
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}
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eina_strbuf_append_printf(buf, "%s ", argv[i]);
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}
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ret = system(eina_strbuf_string_get(buf));
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if ((!strcmp(action, "umount")) && (!ret))
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{
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if (rmdir(mp))
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printf("ERROR: COULD NOT UNLINK MOUNT POINT %s\n", mp);
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}
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return ret;
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2011-05-15 16:47:42 -07:00
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}
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2011-05-16 03:33:57 -07:00
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2008-12-07 17:39:33 -08:00
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eina_shutdown();
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2011-05-15 15:11:30 -07:00
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2006-09-03 01:51:32 -07:00
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return 0;
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2011-05-15 16:47:42 -07:00
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err:
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printf("ERROR: MEMORY CRISIS\n");
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eina_shutdown();
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return 30;
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2006-09-03 01:51:32 -07:00
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}
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/* local subsystem functions */
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static int
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2011-05-15 15:11:30 -07:00
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auth_action_ok(char *a,
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uid_t uid,
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gid_t gid,
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gid_t *gl,
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int gn,
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gid_t egid)
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2006-09-03 01:51:32 -07:00
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{
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struct passwd *pw;
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struct group *gp;
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2006-09-27 23:35:43 -07:00
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char *usr = NULL, **grp, *g;
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int ret, i, j;
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2006-09-03 01:51:32 -07:00
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2006-09-03 16:09:14 -07:00
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pw = getpwuid(uid);
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2006-09-03 01:51:32 -07:00
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if (!pw) return 0;
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usr = pw->pw_name;
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if (!usr) return 0;
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2006-09-27 23:07:15 -07:00
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grp = alloca(sizeof(char *) * (gn + 1 + 1));
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j = 0;
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2006-09-03 16:09:14 -07:00
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gp = getgrgid(gid);
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2006-09-27 23:07:15 -07:00
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if (gp)
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{
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2011-05-15 15:11:30 -07:00
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grp[j] = gp->gr_name;
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j++;
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2006-09-27 23:07:15 -07:00
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}
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for (i = 0; i < gn; i++)
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{
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2011-05-15 15:11:30 -07:00
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if (gl[i] != egid)
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{
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gp = getgrgid(gl[i]);
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if (gp)
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{
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g = alloca(strlen(gp->gr_name) + 1);
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strcpy(g, gp->gr_name);
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grp[j] = g;
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j++;
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}
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}
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2006-09-27 23:07:15 -07:00
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}
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grp[j] = NULL;
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2006-09-03 01:51:32 -07:00
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/* first stage - check:
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* PREFIX/etc/enlightenment/sysactions.conf
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*/
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ret = auth_etc_enlightenment_sysactions(a, usr, grp);
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if (ret == 1) return 1;
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2011-05-15 15:11:30 -07:00
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else if (ret == -1)
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return 0;
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2006-09-03 01:51:32 -07:00
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/* the DEFAULT - allow */
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return 1;
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}
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static int
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2011-05-15 15:11:30 -07:00
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auth_etc_enlightenment_sysactions(char *a,
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char *u,
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char **g)
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2006-09-03 01:51:32 -07:00
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{
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FILE *f;
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char file[4096], buf[4096], id[4096], ugname[4096], perm[4096], act[4096];
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2006-09-27 23:07:15 -07:00
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char *p, *pp, *s, **gp;
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2006-09-03 01:51:32 -07:00
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int len, line = 0, ok = 0;
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int allow = 0;
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int deny = 0;
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2011-05-15 15:11:30 -07:00
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2006-09-03 16:14:01 -07:00
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snprintf(file, sizeof(file), "/etc/enlightenment/sysactions.conf");
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f = fopen(file, "r");
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if (!f)
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2006-09-03 01:51:32 -07:00
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{
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2011-05-15 15:11:30 -07:00
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snprintf(file, sizeof(file), PACKAGE_SYSCONF_DIR "/enlightenment/sysactions.conf");
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f = fopen(file, "r");
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if (!f) return 0;
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2006-09-03 01:51:32 -07:00
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}
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while (fgets(buf, sizeof(buf), f))
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{
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2011-05-15 15:11:30 -07:00
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line++;
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len = strlen(buf);
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if (len < 1) continue;
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if (buf[len - 1] == '\n') buf[len - 1] = 0;
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/* format:
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*
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* # comment
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* user: username [allow:|deny:] halt reboot ...
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* group: groupname [allow:|deny:] suspend ...
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*/
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if (buf[0] == '#') continue;
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p = buf;
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p = get_word(p, id);
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p = get_word(p, ugname);
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pp = p;
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p = get_word(p, perm);
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allow = 0;
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deny = 0;
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if (!strcmp(id, "user:"))
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{
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if (!fnmatch(ugname, u, 0))
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{
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if (!strcmp(perm, "allow:")) allow = 1;
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else if (!strcmp(perm, "deny:"))
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deny = 1;
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else
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goto malformed;
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}
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else
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continue;
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}
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else if (!strcmp(id, "group:"))
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{
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int matched;
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matched = 0;
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for (gp = g; *gp; gp++)
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{
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if (!fnmatch(ugname, *gp, 0))
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{
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matched = 1;
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if (!strcmp(perm, "allow:")) allow = 1;
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else if (!strcmp(perm, "deny:"))
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deny = 1;
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else
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goto malformed;
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}
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}
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if (!matched) continue;
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}
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else if (!strcmp(id, "action:"))
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{
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while ((*pp) && (isspace(*pp))) pp++;
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s = eina_hash_find(actions, ugname);
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|
|
if (s) eina_hash_del(actions, ugname, s);
|
|
|
|
if (!actions) actions = eina_hash_string_superfast_new(free);
|
|
|
|
eina_hash_add(actions, ugname, strdup(pp));
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
else if (id[0] == 0)
|
|
|
|
continue;
|
|
|
|
else
|
|
|
|
goto malformed;
|
|
|
|
|
|
|
|
for (;; )
|
|
|
|
{
|
|
|
|
p = get_word(p, act);
|
|
|
|
if (act[0] == 0) break;
|
|
|
|
if (!fnmatch(act, a, 0))
|
|
|
|
{
|
|
|
|
if (allow) ok = 1;
|
|
|
|
else if (deny)
|
|
|
|
ok = -1;
|
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
continue;
|
|
|
|
malformed:
|
|
|
|
printf("WARNING: %s:%i\n"
|
|
|
|
"LINE: '%s'\n"
|
|
|
|
"MALFORMED LINE. SKIPPED.\n",
|
|
|
|
file, line, buf);
|
2006-09-03 01:51:32 -07:00
|
|
|
}
|
2011-05-15 15:11:30 -07:00
|
|
|
done:
|
2006-09-03 01:51:32 -07:00
|
|
|
fclose(f);
|
|
|
|
return ok;
|
|
|
|
}
|
|
|
|
|
|
|
|
static char *
|
2011-05-15 15:11:30 -07:00
|
|
|
get_word(char *s,
|
|
|
|
char *d)
|
2006-09-03 01:51:32 -07:00
|
|
|
{
|
|
|
|
char *p1, *p2;
|
2011-05-15 15:11:30 -07:00
|
|
|
|
2006-09-03 01:51:32 -07:00
|
|
|
p1 = s;
|
|
|
|
p2 = d;
|
|
|
|
while (*p1)
|
|
|
|
{
|
2011-05-15 15:11:30 -07:00
|
|
|
if (p2 == d)
|
|
|
|
{
|
|
|
|
if (isspace(*p1))
|
|
|
|
{
|
|
|
|
p1++;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (isspace(*p1)) break;
|
|
|
|
*p2 = *p1;
|
|
|
|
p1++;
|
|
|
|
p2++;
|
2006-09-03 01:51:32 -07:00
|
|
|
}
|
|
|
|
*p2 = 0;
|
|
|
|
return p1;
|
|
|
|
}
|
|
|
|
|