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	chroot.c - sbase - suckless unix tools
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	---
	chroot.c (752B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include <errno.h>
	3 #include <stdlib.h>
	4 #include <unistd.h>
	5
	6 #include "util.h"
	7
	8 static void
	9 usage(void)
	10 {
	11 eprintf("usage: %s dir [cmd [arg ...]]\n", argv0);
	12 }
	13
	14 int
	15 main(int argc, char *argv[])
	16 {
	17 char shell[] = { "/bin/sh", "-i", NULL }, aux, *cmd;
	18 int savederrno;
	19
	20 ARGBEGIN {
	21 default:
	22 usage();
	23 } ARGEND
	24
	25 if (!argc)
	26 usage();
	27
	28 if ((aux = getenv("SHELL")))
	29 shell[0] = aux;
	30
	31 if (chroot(argv[0]) < 0)
	32 eprintf("chroot %s:", argv[0]);
	33
	34 if (chdir("/") < 0)
	35 eprintf("chdir:");
	36
	37 if (argc == 1) {
	38 cmd = *shell;
	39 execvp(cmd, shell);
	40 } else {
	41 cmd = argv[1];
	42 execvp(cmd, argv + 1);
	43 }
	44
	45 savederrno = errno;
	46 weprintf("execvp %s:", cmd);
	47
	48 _exit(126 + (savederrno == ENOENT));
	49 }