| /* See LICENSE file for copyright and license details. */ |
| #include <errno.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include "util.h" |
| |
| extern char **environ; |
| |
| static void |
| usage(void) |
| { |
| eprintf("usage: %s [-i] [-u var] ... [var=value] ... [cmd [arg ...]]\n", argv0); |
| } |
| |
| int |
| main(int argc, char *argv[]) |
| { |
| int savederrno; |
| |
| ARGBEGIN { |
| case 'i': |
| *environ = NULL; |
| break; |
| case 'u': |
| if (unsetenv(EARGF(usage())) < 0) |
| eprintf("unsetenv:"); |
| break; |
| default: |
| usage(); |
| } ARGEND |
| |
| for (; *argv && strchr(*argv, '='); argc--, argv++) |
| putenv(*argv); |
| |
| if (*argv) { |
| execvp(*argv, argv); |
| savederrno = errno; |
| weprintf("execvp %s:", *argv); |
| _exit(126 + (savederrno == ENOENT)); |
| } |
| |
| for (; *environ; environ++) |
| puts(*environ); |
| |
| return fshut(stdout, "<stdout>"); |
| } |