1 | 1 |
new file mode 100644 |
... | ... |
@@ -0,0 +1,180 @@ |
1 |
+/* |
|
2 |
+ * $Id$ |
|
3 |
+ * |
|
4 |
+ * Copyright (C) 2001-2003 Fhg Fokus |
|
5 |
+ * |
|
6 |
+ * This file is part of ser, a free SIP server. |
|
7 |
+ * |
|
8 |
+ * ser is free software; you can redistribute it and/or modify |
|
9 |
+ * it under the terms of the GNU General Public License as published by |
|
10 |
+ * the Free Software Foundation; either version 2 of the License, or |
|
11 |
+ * (at your option) any later version |
|
12 |
+ * |
|
13 |
+ * For a license to use the ser software under conditions |
|
14 |
+ * other than those described here, or to purchase support for this |
|
15 |
+ * software, please contact iptel.org by e-mail at the following addresses: |
|
16 |
+ * info@iptel.org |
|
17 |
+ * |
|
18 |
+ * ser is distributed in the hope that it will be useful, |
|
19 |
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
20 |
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
21 |
+ * GNU General Public License for more details. |
|
22 |
+ * |
|
23 |
+ * You should have received a copy of the GNU General Public License |
|
24 |
+ * along with this program; if not, write to the Free Software |
|
25 |
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
|
26 |
+ */ |
|
27 |
+/* |
|
28 |
+ * |
|
29 |
+ * History: |
|
30 |
+ * -------- |
|
31 |
+ * 2004-02-20 removed from ser main.c into its own file (andrei) |
|
32 |
+ * 2004-03-04 moved setuid/setgid in do_suid() (andrei) |
|
33 |
+ */ |
|
34 |
+ |
|
35 |
+#include <sys/types.h> |
|
36 |
+#include <unistd.h> |
|
37 |
+#include <signal.h> |
|
38 |
+#include <syslog.h> |
|
39 |
+#include <errno.h> |
|
40 |
+#include <string.h> |
|
41 |
+#include <stdio.h> |
|
42 |
+#include <stdlib.h> |
|
43 |
+ |
|
44 |
+#include "daemonize.h" |
|
45 |
+#include "globals.h" |
|
46 |
+#include "dprint.h" |
|
47 |
+ |
|
48 |
+ |
|
49 |
+#define MAX_FD 32 /* maximum number of inherited open file descriptors, |
|
50 |
+ (normally it shouldn't be bigger than 3) */ |
|
51 |
+ |
|
52 |
+ |
|
53 |
+ |
|
54 |
+/* daemon init, return 0 on success, -1 on error */ |
|
55 |
+int daemonize(char* name) |
|
56 |
+{ |
|
57 |
+ FILE *pid_stream; |
|
58 |
+ pid_t pid; |
|
59 |
+ int r, p; |
|
60 |
+ |
|
61 |
+ |
|
62 |
+ p=-1; |
|
63 |
+ |
|
64 |
+ |
|
65 |
+ if (chroot_dir&&(chroot(chroot_dir)<0)){ |
|
66 |
+ LOG(L_CRIT, "Cannot chroot to %s: %s\n", chroot_dir, strerror(errno)); |
|
67 |
+ goto error; |
|
68 |
+ } |
|
69 |
+ |
|
70 |
+ if (chdir(working_dir)<0){ |
|
71 |
+ LOG(L_CRIT,"cannot chdir to %s: %s\n", working_dir, strerror(errno)); |
|
72 |
+ goto error; |
|
73 |
+ } |
|
74 |
+ |
|
75 |
+ /* fork to become!= group leader*/ |
|
76 |
+ if ((pid=fork())<0){ |
|
77 |
+ LOG(L_CRIT, "Cannot fork:%s\n", strerror(errno)); |
|
78 |
+ goto error; |
|
79 |
+ }else if (pid!=0){ |
|
80 |
+ /* parent process => exit*/ |
|
81 |
+ exit(0); |
|
82 |
+ } |
|
83 |
+ /* become session leader to drop the ctrl. terminal */ |
|
84 |
+ if (setsid()<0){ |
|
85 |
+ LOG(L_WARN, "setsid failed: %s\n",strerror(errno)); |
|
86 |
+ }else{ |
|
87 |
+ own_pgid=1;/* we have our own process group */ |
|
88 |
+ } |
|
89 |
+ /* fork again to drop group leadership */ |
|
90 |
+ if ((pid=fork())<0){ |
|
91 |
+ LOG(L_CRIT, "Cannot fork:%s\n", strerror(errno)); |
|
92 |
+ goto error; |
|
93 |
+ }else if (pid!=0){ |
|
94 |
+ /*parent process => exit */ |
|
95 |
+ exit(0); |
|
96 |
+ } |
|
97 |
+ |
|
98 |
+ /* added by noh: create a pid file for the main process */ |
|
99 |
+ if (pid_file!=0){ |
|
100 |
+ |
|
101 |
+ if ((pid_stream=fopen(pid_file, "r"))!=NULL){ |
|
102 |
+ fscanf(pid_stream, "%d", &p); |
|
103 |
+ fclose(pid_stream); |
|
104 |
+ if (p==-1){ |
|
105 |
+ LOG(L_CRIT, "pid file %s exists, but doesn't contain a valid" |
|
106 |
+ " pid number\n", pid_file); |
|
107 |
+ goto error; |
|
108 |
+ } |
|
109 |
+ if (kill((pid_t)p, 0)==0 || errno==EPERM){ |
|
110 |
+ LOG(L_CRIT, "running process found in the pid file %s\n", |
|
111 |
+ pid_file); |
|
112 |
+ goto error; |
|
113 |
+ }else{ |
|
114 |
+ LOG(L_WARN, "pid file contains old pid, replacing pid\n"); |
|
115 |
+ } |
|
116 |
+ } |
|
117 |
+ pid=getpid(); |
|
118 |
+ if ((pid_stream=fopen(pid_file, "w"))==NULL){ |
|
119 |
+ LOG(L_WARN, "unable to create pid file %s: %s\n", |
|
120 |
+ pid_file, strerror(errno)); |
|
121 |
+ goto error; |
|
122 |
+ }else{ |
|
123 |
+ fprintf(pid_stream, "%i\n", (int)pid); |
|
124 |
+ fclose(pid_stream); |
|
125 |
+ } |
|
126 |
+ } |
|
127 |
+ |
|
128 |
+ /* try to replace stdin, stdout & stderr with /dev/null */ |
|
129 |
+ if (freopen("/dev/null", "r", stdin)==0){ |
|
130 |
+ LOG(L_ERR, "unable to replace stdin with /dev/null: %s\n", |
|
131 |
+ strerror(errno)); |
|
132 |
+ /* continue, leave it open */ |
|
133 |
+ }; |
|
134 |
+ if (freopen("/dev/null", "w", stdout)==0){ |
|
135 |
+ LOG(L_ERR, "unable to replace stdout with /dev/null: %s\n", |
|
136 |
+ strerror(errno)); |
|
137 |
+ /* continue, leave it open */ |
|
138 |
+ }; |
|
139 |
+ /* close stderr only if log_stderr=0 */ |
|
140 |
+ if ((!log_stderr) &&(freopen("/dev/null", "w", stderr)==0)){ |
|
141 |
+ LOG(L_ERR, "unable to replace stderr with /dev/null: %s\n", |
|
142 |
+ strerror(errno)); |
|
143 |
+ /* continue, leave it open */ |
|
144 |
+ }; |
|
145 |
+ |
|
146 |
+ /* close any open file descriptors */ |
|
147 |
+ closelog(); |
|
148 |
+ for (r=3;r<MAX_FD; r++){ |
|
149 |
+ close(r); |
|
150 |
+ } |
|
151 |
+ |
|
152 |
+ if (log_stderr==0) |
|
153 |
+ openlog(name, LOG_PID|LOG_CONS, log_facility); |
|
154 |
+ /* LOG_CONS, LOG_PERRROR ? */ |
|
155 |
+ |
|
156 |
+ return 0; |
|
157 |
+ |
|
158 |
+error: |
|
159 |
+ return -1; |
|
160 |
+} |
|
161 |
+ |
|
162 |
+ |
|
163 |
+ |
|
164 |
+int do_suid() |
|
165 |
+{ |
|
166 |
+ if (gid&&(setgid(gid)<0)){ |
|
167 |
+ LOG(L_CRIT, "cannot change gid to %d: %s\n", gid, strerror(errno)); |
|
168 |
+ goto error; |
|
169 |
+ } |
|
170 |
+ |
|
171 |
+ if(uid&&(setuid(uid)<0)){ |
|
172 |
+ LOG(L_CRIT, "cannot change uid to %d: %s\n", uid, strerror(errno)); |
|
173 |
+ goto error; |
|
174 |
+ } |
|
175 |
+ return 0; |
|
176 |
+error: |
|
177 |
+ return -1; |
|
178 |
+} |
|
179 |
+ |
|
180 |
+ |
0 | 181 |
new file mode 100644 |
... | ... |
@@ -0,0 +1,41 @@ |
1 |
+/* |
|
2 |
+ * $Id$ |
|
3 |
+ * |
|
4 |
+ * Copyright (C) 2001-2003 Fhg Fokus |
|
5 |
+ * |
|
6 |
+ * This file is part of ser, a free SIP server. |
|
7 |
+ * |
|
8 |
+ * ser is free software; you can redistribute it and/or modify |
|
9 |
+ * it under the terms of the GNU General Public License as published by |
|
10 |
+ * the Free Software Foundation; either version 2 of the License, or |
|
11 |
+ * (at your option) any later version |
|
12 |
+ * |
|
13 |
+ * For a license to use the ser software under conditions |
|
14 |
+ * other than those described here, or to purchase support for this |
|
15 |
+ * software, please contact iptel.org by e-mail at the following addresses: |
|
16 |
+ * info@iptel.org |
|
17 |
+ * |
|
18 |
+ * ser is distributed in the hope that it will be useful, |
|
19 |
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
20 |
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
|
21 |
+ * GNU General Public License for more details. |
|
22 |
+ * |
|
23 |
+ * You should have received a copy of the GNU General Public License |
|
24 |
+ * along with this program; if not, write to the Free Software |
|
25 |
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
|
26 |
+ */ |
|
27 |
+/* |
|
28 |
+ * |
|
29 |
+ * History: |
|
30 |
+ * -------- |
|
31 |
+ * 2004-02-20 created by andrei |
|
32 |
+ */ |
|
33 |
+ |
|
34 |
+#ifndef _daemonize_h |
|
35 |
+#define _daemonize_h |
|
36 |
+ |
|
37 |
+int daemonize(char* name); |
|
38 |
+int do_suid(); |
|
39 |
+ |
|
40 |
+ |
|
41 |
+#endif |
... | ... |
@@ -48,6 +48,12 @@ extern int config_check; |
48 | 48 |
extern char *stat_file; |
49 | 49 |
extern unsigned short port_no; |
50 | 50 |
|
51 |
+extern int uid; |
|
52 |
+extern int gid; |
|
53 |
+char* pid_file; |
|
54 |
+extern int own_pgid; /* whether or not we have our own pgid (and it's ok |
|
55 |
+>--->--->--->--->--->--->--->--->--->--->--- to use kill(0, sig) */ |
|
56 |
+ |
|
51 | 57 |
extern struct socket_info* bind_address; /* pointer to the crt. proc. |
52 | 58 |
listening address */ |
53 | 59 |
extern struct socket_info* sendipv4; /* ipv4 socket to use when msg. |
... | ... |
@@ -79,6 +79,7 @@ |
79 | 79 |
|
80 | 80 |
#include "config.h" |
81 | 81 |
#include "dprint.h" |
82 |
+#include "daemonize.h" |
|
82 | 83 |
#include "route.h" |
83 | 84 |
#include "udp_server.h" |
84 | 85 |
#include "globals.h" |
... | ... |
@@ -430,125 +431,6 @@ void cleanup(show_status) |
430 | 431 |
|
431 | 432 |
|
432 | 433 |
|
433 |
-/* daemon init, return 0 on success, -1 on error */ |
|
434 |
-int daemonize(char* name) |
|
435 |
-{ |
|
436 |
- FILE *pid_stream; |
|
437 |
- pid_t pid; |
|
438 |
- int r, p; |
|
439 |
- |
|
440 |
- |
|
441 |
- p=-1; |
|
442 |
- |
|
443 |
- |
|
444 |
- if (chroot_dir&&(chroot(chroot_dir)<0)){ |
|
445 |
- LOG(L_CRIT, "Cannot chroot to %s: %s\n", chroot_dir, strerror(errno)); |
|
446 |
- goto error; |
|
447 |
- } |
|
448 |
- |
|
449 |
- if (chdir(working_dir)<0){ |
|
450 |
- LOG(L_CRIT,"cannot chdir to %s: %s\n", working_dir, strerror(errno)); |
|
451 |
- goto error; |
|
452 |
- } |
|
453 |
- |
|
454 |
- if (gid&&(setgid(gid)<0)){ |
|
455 |
- LOG(L_CRIT, "cannot change gid to %d: %s\n", gid, strerror(errno)); |
|
456 |
- goto error; |
|
457 |
- } |
|
458 |
- |
|
459 |
- if(uid&&(setuid(uid)<0)){ |
|
460 |
- LOG(L_CRIT, "cannot change uid to %d: %s\n", uid, strerror(errno)); |
|
461 |
- goto error; |
|
462 |
- } |
|
463 |
- |
|
464 |
- /* fork to become!= group leader*/ |
|
465 |
- if ((pid=fork())<0){ |
|
466 |
- LOG(L_CRIT, "Cannot fork:%s\n", strerror(errno)); |
|
467 |
- goto error; |
|
468 |
- }else if (pid!=0){ |
|
469 |
- /* parent process => exit*/ |
|
470 |
- exit(0); |
|
471 |
- } |
|
472 |
- /* become session leader to drop the ctrl. terminal */ |
|
473 |
- if (setsid()<0){ |
|
474 |
- LOG(L_WARN, "setsid failed: %s\n",strerror(errno)); |
|
475 |
- }else{ |
|
476 |
- own_pgid=1; /* we have our own process group */ |
|
477 |
- } |
|
478 |
- /* fork again to drop group leadership */ |
|
479 |
- if ((pid=fork())<0){ |
|
480 |
- LOG(L_CRIT, "Cannot fork:%s\n", strerror(errno)); |
|
481 |
- goto error; |
|
482 |
- }else if (pid!=0){ |
|
483 |
- /*parent process => exit */ |
|
484 |
- exit(0); |
|
485 |
- } |
|
486 |
- |
|
487 |
- /* added by noh: create a pid file for the main process */ |
|
488 |
- if (pid_file!=0){ |
|
489 |
- |
|
490 |
- if ((pid_stream=fopen(pid_file, "r"))!=NULL){ |
|
491 |
- fscanf(pid_stream, "%d", &p); |
|
492 |
- fclose(pid_stream); |
|
493 |
- if (p==-1){ |
|
494 |
- LOG(L_CRIT, "pid file %s exists, but doesn't contain a valid" |
|
495 |
- " pid number\n", pid_file); |
|
496 |
- goto error; |
|
497 |
- } |
|
498 |
- if (kill((pid_t)p, 0)==0 || errno==EPERM){ |
|
499 |
- LOG(L_CRIT, "running process found in the pid file %s\n", |
|
500 |
- pid_file); |
|
501 |
- goto error; |
|
502 |
- }else{ |
|
503 |
- LOG(L_WARN, "pid file contains old pid, replacing pid\n"); |
|
504 |
- } |
|
505 |
- } |
|
506 |
- pid=getpid(); |
|
507 |
- if ((pid_stream=fopen(pid_file, "w"))==NULL){ |
|
508 |
- LOG(L_WARN, "unable to create pid file %s: %s\n", |
|
509 |
- pid_file, strerror(errno)); |
|
510 |
- goto error; |
|
511 |
- }else{ |
|
512 |
- fprintf(pid_stream, "%i\n", (int)pid); |
|
513 |
- fclose(pid_stream); |
|
514 |
- } |
|
515 |
- } |
|
516 |
- |
|
517 |
- /* try to replace stdin, stdout & stderr with /dev/null */ |
|
518 |
- if (freopen("/dev/null", "r", stdin)==0){ |
|
519 |
- LOG(L_ERR, "unable to replace stdin with /dev/null: %s\n", |
|
520 |
- strerror(errno)); |
|
521 |
- /* continue, leave it open */ |
|
522 |
- }; |
|
523 |
- if (freopen("/dev/null", "w", stdout)==0){ |
|
524 |
- LOG(L_ERR, "unable to replace stdout with /dev/null: %s\n", |
|
525 |
- strerror(errno)); |
|
526 |
- /* continue, leave it open */ |
|
527 |
- }; |
|
528 |
- /* close stderr only if log_stderr=0 */ |
|
529 |
- if ((!log_stderr) &&(freopen("/dev/null", "w", stderr)==0)){ |
|
530 |
- LOG(L_ERR, "unable to replace stderr with /dev/null: %s\n", |
|
531 |
- strerror(errno)); |
|
532 |
- /* continue, leave it open */ |
|
533 |
- }; |
|
534 |
- |
|
535 |
- /* close any open file descriptors */ |
|
536 |
- closelog(); |
|
537 |
- for (r=3;r<MAX_FD; r++){ |
|
538 |
- close(r); |
|
539 |
- } |
|
540 |
- |
|
541 |
- if (log_stderr==0) |
|
542 |
- openlog(name, LOG_PID|LOG_CONS, log_facility); |
|
543 |
- /* LOG_CONS, LOG_PERRROR ? */ |
|
544 |
- return 0; |
|
545 |
- |
|
546 |
-error: |
|
547 |
- return -1; |
|
548 |
-} |
|
549 |
- |
|
550 |
- |
|
551 |
- |
|
552 | 434 |
/* tries to send a signal to all our processes |
553 | 435 |
* if daemonized is ok to send the signal to all the process group, |
554 | 436 |
* however if not daemonized we might end up sending the signal also |
... | ... |
@@ -788,7 +670,7 @@ int main_loop() |
788 | 670 |
LOG(L_WARN, "WARNING: using only the first listen address" |
789 | 671 |
" (no fork)\n"); |
790 | 672 |
} |
791 |
- |
|
673 |
+ if (do_suid()==-1) goto error; /* try to drop priviledges */ |
|
792 | 674 |
/* process_no now initialized to zero -- increase from now on |
793 | 675 |
as new processes are forked (while skipping 0 reserved for main |
794 | 676 |
*/ |
... | ... |
@@ -917,6 +799,7 @@ int main_loop() |
917 | 799 |
#endif /* USE_TCP */ |
918 | 800 |
/* all procs should have access to all the sockets (for sending) |
919 | 801 |
* so we open all first*/ |
802 |
+ if (do_suid()==-1) goto error; /* try to drop priviledges */ |
|
920 | 803 |
/* udp processes */ |
921 | 804 |
for(si=udp_listen; si; si=si->next){ |
922 | 805 |
for(i=0;i<children_no;i++){ |