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sys-utils/pivot_root.c
74 строки
2 KB
Karel Zak
sys-utils: cleanup license lines, add SPDX
11 дек 2023, 15:37
11 дек 2023, 15:37
9abd5e4
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/* * SPDX-License-Identifier: GPL-2.0-or-later * * 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. * * Copyright (C) 2000 Werner Almesberger */ #include <err.h> #include <errno.h> #include <getopt.h> #include <stdio.h> #include <stdlib.h> #include <sys/syscall.h> #include <unistd.h> #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); fprintf(out, USAGE_HELP_OPTIONS(16)); fprintf(out, 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); close_stdout_atexit(); while ((ch = getopt_long(argc, argv, "Vh", longopts, NULL)) != -1) switch (ch) { case 'V': print_version(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; }