git.sur5r.net Git - cc65/blob - src/cl65/spawn-unix.inc

   1 /*****************************************************************************/
   2 /*                                                                           */
   3 /*                              spawn-unix.inc                               */
   4 /*                                                                           */
   5 /*                Execute other external programs (Unix version)             */
   6 /*                                                                           */
   7 /*                                                                           */
   8 /*                                                                           */
   9 /* (C) 1999-2002 Ullrich von Bassewitz                                       */
  10 /*               Wacholderweg 14                                             */
  11 /*               D-70597 Stuttgart                                           */
  12 /* EMail:        uz@musoftware.de                                            */
  13 /*                                                                           */
  14 /*                                                                           */
  15 /* This software is provided 'as-is', without any expressed or implied       */
  16 /* warranty.  In no event will the authors be held liable for any damages    */
  17 /* arising from the use of this software.                                    */
  18 /*                                                                           */
  19 /* Permission is granted to anyone to use this software for any purpose,     */
  20 /* including commercial applications, and to alter it and redistribute it    */
  21 /* freely, subject to the following restrictions:                            */
  22 /*                                                                           */
  23 /* 1. The origin of this software must not be misrepresented; you must not   */
  24 /*    claim that you wrote the original software. If you use this software   */
  25 /*    in a product, an acknowledgment in the product documentation would be  */
  26 /*    appreciated but is not required.                                       */
  27 /* 2. Altered source versions must be plainly marked as such, and must not   */
  28 /*    be misrepresented as being the original software.                      */
  29 /* 3. This notice may not be removed or altered from any source              */
  30 /*    distribution.                                                          */
  31 /*                                                                           */
  32 /*****************************************************************************/
  33
  34
  35
  36 #include <unistd.h>
  37 #include <string.h>
  38 #include <errno.h>
  39 #include <sys/types.h>
  40 #include <sys/wait.h>
  41
  42
  43
  44 /*****************************************************************************/
  45 /*                                   Data                                    */
  46 /*****************************************************************************/
  47
  48
  49
  50 /* Mode argument for spawn. This value is ignored by the function and only
  51 ** provided for DOS/Windows compatibility.
  52 */
  53 #ifndef P_WAIT
  54 #define P_WAIT  0
  55 #endif
  56
  57
  58
  59 /*****************************************************************************/
  60 /*                                   Code                                    */
  61 /*****************************************************************************/
  62
  63
  64
  65 int spawnvp (int Mode attribute ((unused)), const char* File, char* const argv [])
  66 /* Execute the given program searching and wait til it terminates. The Mode
  67 ** argument is ignored (compatibility only). The result of the function is
  68 ** the return code of the program. The function will terminate the program
  69 ** on errors.
  70 */
  71 {
  72     int Status = 0;
  73
  74     /* Fork */
  75     int pid = fork ();
  76     if (pid < 0) {
  77
  78         /* Error forking */
  79         Error ("Cannot fork: %s", strerror (errno));
  80
  81     } else if (pid == 0) {
  82
  83         /* The son - exec the program */
  84         if (execvp (File, argv) < 0) {
  85             Error ("Cannot exec `%s': %s", File, strerror (errno));
  86         }
  87
  88     } else {
  89
  90         /* The father: Wait for the subprocess to terminate */
  91         if (waitpid (pid, &Status, 0) < 0) {
  92             Error ("Failure waiting for subprocess: %s", strerror (errno));
  93         }
  94
  95         /* Examine the child status */
  96         if (!WIFEXITED (Status)) {
  97             Error ("Subprocess `%s' aborted by signal %d", File, WTERMSIG (Status));
  98         }
  99     }
 100
 101     /* Only the father goes here, we place a return here regardless of that
 102     ** to avoid compiler warnings.
 103     */
 104     return WEXITSTATUS (Status);
 105 }