libs/port/spawn.c

   1 /*
   2  * spawnvp function
   3  *
   4  * Copyright 2003 Dimitrie O. Paun
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <errno.h>
  25 #include <signal.h>
  26 #include <stdlib.h>
  27 #ifdef HAVE_SYS_WAIT_H
  28 #include <sys/wait.h>
  29 #endif
  30 #include <sys/stat.h>
  31 #ifdef HAVE_UNISTD_H
  32 # include <unistd.h>
  33 #endif
  34
  35 #ifndef HAVE_SPAWNVP
  36 int spawnvp(int mode, const char *cmdname, const char *const argv[])
  37 {
  38 #ifndef HAVE__SPAWNVP
  39     int pid = 0, status, wret;
  40     struct sigaction dfl_act, old_act;
  41
  42     if (mode == _P_OVERLAY)
  43     {
  44         execvp(cmdname, (char **)argv);
  45         /* if we get here it failed */
  46         if (errno != ENOTSUP) return -1;  /* exec fails on MacOS if the process has multiple threads */
  47     }
  48
  49     dfl_act.sa_handler = SIG_DFL;
  50     dfl_act.sa_flags = 0;
  51     sigemptyset( &dfl_act.sa_mask );
  52
  53     if (mode == _P_WAIT) sigaction( SIGCHLD, &dfl_act, &old_act );
  54
  55     pid = fork();
  56     if (pid == 0)
  57     {
  58         sigaction( SIGPIPE, &dfl_act, NULL );
  59         execvp(cmdname, (char **)argv);
  60         _exit(1);
  61     }
  62
  63     if (pid != -1 && mode == _P_OVERLAY) exit(0);
  64
  65     if (pid != -1 && mode == _P_WAIT)
  66     {
  67         while (pid != (wret = waitpid(pid, &status, 0)))
  68             if (wret == -1 && errno != EINTR) break;
  69
  70         if (pid == wret && WIFEXITED(status)) pid = WEXITSTATUS(status);
  71         else pid = 255; /* abnormal exit with an abort or an interrupt */
  72     }
  73
  74     if (mode == _P_WAIT) sigaction( SIGCHLD, &old_act, NULL );
  75     return pid;
  76 #else   /* HAVE__SPAWNVP */
  77     return _spawnvp(mode, cmdname, argv);
  78 #endif  /* HAVE__SPAWNVP */
  79 }
  80 #endif  /* HAVE_SPAWNVP */