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[android-x86/external-toybox.git] / toys / posix / nohup.c
1 /* nohup.c - run commandline with SIGHUP blocked.
2  *
3  * Copyright 2011 Rob Landley <rob@landley.net>
4  *
5  * See http://opengroup.org/onlinepubs/9699919799/utilities/nohup.html
6
7 USE_NOHUP(NEWTOY(nohup, "<1^", TOYFLAG_USR|TOYFLAG_BIN))
8
9 config NOHUP
10   bool "nohup"
11   default y
12   help
13     usage: nohup COMMAND [ARGS...]
14
15     Run a command that survives the end of its terminal.
16
17     Redirect tty on stdin to /dev/null, tty on stdout to "nohup.out".
18 */
19
20 #include "toys.h"
21
22 void nohup_main(void)
23 {
24   xsignal(SIGHUP, SIG_IGN);
25   if (isatty(1)) {
26     close(1);
27     if (-1 == open("nohup.out", O_CREAT|O_APPEND|O_WRONLY,
28         S_IRUSR|S_IWUSR ))
29     {
30       char *temp = getenv("HOME");
31
32       temp = xmprintf("%s/%s", temp ? temp : "", "nohup.out");
33       xcreate(temp, O_CREAT|O_APPEND|O_WRONLY, 0600);
34       free(temp);
35     }
36   }
37   if (isatty(0)) {
38     close(0);
39     xopen_stdio("/dev/null", O_RDONLY);
40   }
41   xexec(toys.optargs);
42 }