1 /*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *
16 */
17
18
19 #include <sys/types.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <fcntl.h>
23 #include <unistd.h>
24 #include <sys/stat.h>
25 #include <sys/wait.h>
26
27
28 #include "hardware_legacy/power.h"
29
30
main(int argc,char ** argv)31 int main(int argc, char **argv)
32 {
33 int pid, fd, mode;
34 unsigned int delay = 0;
35 int status = 0;
36 char *file = 0;
37 char lockid[32];
38
39 if (argc < 2) {
40 printf("Usage: %s [-f logfile] [-a] [-d delay] <program>\n", argv[0]);
41 exit(1);
42 }
43 close(0); open("/dev/null", 0);
44 close(1);
45
46 mode = O_TRUNC;
47
48 while(**++argv == '-') {
49 while(*++*argv) {
50 switch(**argv) {
51 case 'f':
52 if(*++*argv)
53 file = *argv;
54 else
55 file = *++argv;
56 goto next_arg;
57 case 'd':
58 if(*++*argv)
59 delay = atoi(*argv);
60 else
61 delay = atoi(*++argv);
62 goto next_arg;
63 case 'a':
64 mode = O_APPEND;
65 break;
66 }
67 }
68 next_arg: ;
69 }
70
71 if (file) {
72 if(open(file, O_WRONLY|mode|O_CREAT, 0666) < 0) {
73 perror(file);
74 exit(1);
75 }
76 }
77 else {
78 if(open("/dev/null", O_WRONLY) < 0) {
79 perror("/dev/null");
80 exit(1);
81 }
82 }
83
84 switch(pid = fork()) {
85 case -1:
86 perror(argv[0]);
87 exit(1);
88 break;
89 case 0:
90 fflush(stdout);
91 close(2); dup(1); /* join stdout and stderr */
92 chdir("/");
93 umask(0);
94 setpgrp();
95 setsid();
96 for (fd = 3; fd < 256; fd++) {
97 close(fd);
98 }
99 if(delay) {
100 snprintf(lockid, 32, "daemonize%d", (int) getpid());
101 acquire_wake_lock(PARTIAL_WAKE_LOCK, lockid);
102 }
103
104 switch(pid = fork()) {
105 case -1:
106 break;
107 case 0:
108 if(delay) {
109 sleep(delay);
110 }
111 execv(argv[0], argv);
112 execvp(argv[0], argv);
113 perror(argv[0]);
114 break;
115 default:
116 if(delay) {
117 waitpid(pid, &status, 0);
118 release_wake_lock(lockid);
119 }
120 _exit(0);
121 }
122 _exit(1);
123 break;
124 default:
125 exit(0);
126 break;
127 }
128 }
129
130 /* vim:ts=4:sw=4:softtabstop=4:smarttab:expandtab */
131