68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/*
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* vercmp.c - Compare package version numbers using pacman's version
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* comparison logic
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*
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* Copyright (c) 2006-2016 Pacman Development Team <pacman-dev@archlinux.org>
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* Copyright (c) 2002-2005 by Judd Vinet <jvinet@zeroflux.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <stdio.h> /* printf */
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#include <string.h>
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/* forward declaration, comes from version.o in libalpm source that is linked
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* in directly so we don't have any library deps */
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int alpm_pkg_vercmp(const char *a, const char *b);
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static void usage(void)
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{
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fprintf(stderr, "vercmp (pacman) v" PACKAGE_VERSION "\n\n"
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"Compare package version numbers using pacman's version comparison logic.\n\n"
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"Usage: vercmp <ver1> <ver2>\n\n"
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"Output values:\n"
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" < 0 : if ver1 < ver2\n"
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" 0 : if ver1 == ver2\n"
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" > 0 : if ver1 > ver2\n");
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}
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int main(int argc, char *argv[])
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{
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const char *s1 = "";
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const char *s2 = "";
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int ret;
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if(argc == 1) {
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usage();
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return 2;
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}
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if(argc > 1 &&
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(strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help") == 0
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|| strcmp(argv[1], "--usage") == 0)) {
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usage();
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return 0;
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}
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if(argc > 2) {
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s2 = argv[2];
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}
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if(argc > 1) {
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s1 = argv[1];
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}
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ret = alpm_pkg_vercmp(s1, s2);
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printf("%d\n", ret);
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return EXIT_SUCCESS;
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}
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