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      1 /* nohup.c - run commandline with SIGHUP blocked.
      2  *
      3  * Copyright 2011 Rob Landley <rob (at) 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 }
     43