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spawn.c (919B)


      1 /* See LICENSE file for copyright and license details. */
      2 #include <sys/types.h>
      3 #include <sys/wait.h>
      4 
      5 #include <errno.h>
      6 #include <stdarg.h>
      7 #include <stdlib.h>
      8 #include <unistd.h>
      9 
     10 #include "util.h"
     11 
     12 int
     13 spawnvp(char *dir, char *file, char *argv[])
     14 {
     15 	pid_t pid;
     16 	int status, r;
     17 
     18 	pid = fork();
     19 	switch (pid) {
     20 	case -1:
     21 		return -1;
     22 	case 0:
     23 		if (dir != NULL && chdir(dir) == -1)
     24 			exit(1);
     25 		execvp(file, argv);
     26 		_exit(1);
     27 	default:
     28 		while ((r = waitpid(pid, &status, 0)) == -1 && errno == EINTR)
     29 			continue;
     30 		if (r == -1)
     31 			return -1;
     32 		if (WIFEXITED(status) && WEXITSTATUS(status) != 0)
     33 			return -1;
     34 	}
     35 	return 0;
     36 }
     37 
     38 int
     39 spawnlp(char *dir, char *file, char *argv0, ...)
     40 {
     41 	char *argv[NR_ARGS];
     42 	va_list ap;
     43 	int argc;
     44 
     45 	va_start(ap, argv0);
     46 	argv[0] = argv0;
     47 	for (argc = 1; (argv[argc] = va_arg(ap, char *)) != (void *)0; argc++)
     48 		;
     49 	argv[argc] = NULL;
     50 	va_end(ap);
     51 	return spawnvp(dir, file, argv);
     52 }