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49 lines
776 B
C
49 lines
776 B
C
/* See LICENSE file for copyright and license details. */
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "util.h"
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static void
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usage(void)
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{
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eprintf("usage: chroot dir [command [arg...]]\n");
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}
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int
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main(int argc, char *argv[])
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{
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char *shell[] = { "/bin/sh", "-i", NULL }, *aux, *p;
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int savederrno;
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ARGBEGIN {
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default:
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usage();
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} ARGEND;
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if(argc < 1)
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usage();
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if((aux = getenv("SHELL")))
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shell[0] = aux;
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if(chroot(argv[0]) == -1)
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eprintf("chroot %s:", argv[0]);
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if(chdir("/") == -1)
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eprintf("chdir:");
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if(argc == 1) {
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p = *shell;
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execvp(*shell, shell);
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} else {
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p = argv[1];
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execvp(argv[1], argv+1);
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}
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savederrno = errno;
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weprintf("execvp %s:", p);
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_exit(savederrno == ENOENT ? 127 : 126);
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return EXIT_FAILURE;
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}
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