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switch_root: error_msg -> perror_msg, reduce by 22 bytes while at it.

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Denis Vlasenko 2007-04-18 21:40:30 +00:00
parent 088b959d00
commit 3ace9fa6d8
1 changed files with 8 additions and 7 deletions
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15
util-linux/switch_root.c
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@ -75,14 +75,14 @@ int switch_root_main(int argc, char **argv)
opt_complementary = "-2"; opt_complementary = "-2";
getopt32(argc, argv, "c:", &console); getopt32(argc, argv, "c:", &console);
argv += optind;
// Change to new root directory and verify it's a different fs. // Change to new root directory and verify it's a different fs.
newroot = argv[optind++]; newroot = *argv++;
if (chdir(newroot) || lstat(".", &st1) || lstat("/", &st2) || xchdir(newroot);
st1.st_dev == st2.st_dev) if (lstat(".", &st1) || lstat("/", &st2) || st1.st_dev == st2.st_dev) {
{
bb_error_msg_and_die("bad newroot %s", newroot); bb_error_msg_and_die("bad newroot %s", newroot);
} }
rootdev = st2.st_dev; rootdev = st2.st_dev;
@ -105,8 +105,9 @@ int switch_root_main(int argc, char **argv)
// Overmount / with newdir and chroot into it. The chdir is needed to // Overmount / with newdir and chroot into it. The chdir is needed to
// recalculate "." and ".." links. // recalculate "." and ".." links.
if (mount(".", "/", NULL, MS_MOVE, NULL) || chroot(".") || chdir("/")) if (mount(".", "/", NULL, MS_MOVE, NULL) || chroot("."))
bb_error_msg_and_die("error moving root"); bb_error_msg_and_die("error moving root");
xchdir("/");
// If a new console specified, redirect stdin/stdout/stderr to that. // If a new console specified, redirect stdin/stdout/stderr to that.
@ -118,6 +119,6 @@ int switch_root_main(int argc, char **argv)
} }
// Exec real init. (This is why we must be pid 1.) // Exec real init. (This is why we must be pid 1.)
execv(argv[optind], argv+optind); execv(argv[0], argv);
bb_error_msg_and_die("bad init '%s'", argv[optind]); bb_perror_msg_and_die("bad init %s", argv[0]);
} }