From 8cb83eee5a58b1fad74c34094ce3afb9e430b5a4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 04:42:50 +0200 Subject: Adding upstream version 2.33.1. Signed-off-by: Daniel Baumann --- sys-utils/pivot_root.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 sys-utils/pivot_root.c (limited to 'sys-utils/pivot_root.c') diff --git a/sys-utils/pivot_root.c b/sys-utils/pivot_root.c new file mode 100644 index 0000000..ea76d94 --- /dev/null +++ b/sys-utils/pivot_root.c @@ -0,0 +1,80 @@ +/* + * pivot_root.c - Change the root file system + * + * Copyright (C) 2000 Werner Almesberger + * + * This file is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This file is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#include +#include +#include +#include +#include +#include +#include + +#include "c.h" +#include "nls.h" +#include "closestream.h" + +#define pivot_root(new_root,put_old) syscall(SYS_pivot_root,new_root,put_old) + +static void __attribute__((__noreturn__)) usage(void) +{ + FILE *out = stdout; + fputs(USAGE_HEADER, out); + fprintf(out, _(" %s [options] new_root put_old\n"), + program_invocation_short_name); + + fputs(USAGE_SEPARATOR, out); + fputs(_("Change the root filesystem.\n"), out); + + fputs(USAGE_OPTIONS, out); + printf(USAGE_HELP_OPTIONS(16)); + printf(USAGE_MAN_TAIL("pivot_root(8)")); + exit(EXIT_SUCCESS); +} + +int main(int argc, char **argv) +{ + int ch; + static const struct option longopts[] = { + {"version", no_argument, NULL, 'V'}, + {"help", no_argument, NULL, 'h'}, + {NULL, 0, NULL, 0} + }; + + setlocale(LC_ALL, ""); + bindtextdomain(PACKAGE, LOCALEDIR); + textdomain(PACKAGE); + atexit(close_stdout); + + while ((ch = getopt_long(argc, argv, "Vh", longopts, NULL)) != -1) + switch (ch) { + case 'V': + printf(UTIL_LINUX_VERSION); + return EXIT_SUCCESS; + case 'h': + usage(); + default: + errtryhelp(EXIT_FAILURE); + } + + if (argc != 3) { + warnx(_("bad usage")); + errtryhelp(EXIT_FAILURE); + } + if (pivot_root(argv[1], argv[2]) < 0) + err(EXIT_FAILURE, _("failed to change root from `%s' to `%s'"), + argv[1], argv[2]); + + return EXIT_SUCCESS; +} -- cgit v1.2.3