src/system/libroot/posix/unistd/system.cpp

   1 /*
   2  * Copyright 2004-2011, Ingo Weinhold, ingo_weinhold@gmx.de.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6 #include <image.h>
   7
   8 #include <errno.h>
   9 #include <pthread.h>
  10 #include <stdlib.h>
  11 #include <sys/wait.h>
  12 #include <unistd.h>
  13
  14 #include <errno_private.h>
  15 #include <syscall_utils.h>
  16
  17
  18 extern "C" int
  19 system(const char *command)
  20 {
  21         if (!command)
  22                 return 1;
  23
  24         const char *argv[] = { "/bin/sh", "-c", command, NULL };
  25         int argc = 3;
  26
  27         thread_id thread = load_image(argc, argv, (const char **)environ);
  28         if (thread < 0)
  29                 RETURN_AND_SET_ERRNO_TEST_CANCEL(thread);
  30
  31         resume_thread(thread);
  32
  33         int exitStatus;
  34         pid_t result;
  35         while ((result = waitpid(thread, &exitStatus, 0)) < 0
  36                 && errno == B_INTERRUPTED) {
  37                 // waitpid() was interrupted by a signal, retry...
  38         }
  39
  40         if (result < 0)
  41                 return -1;
  42
  43         return exitStatus;
  44 }