testpkg.c

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/*
 *  testpkg.c : Test a pacman package for validity
 *
 *  Copyright (c) 2007 by Aaron Griffin <aaronmgriffin@gmail.com>
 *
 *  This program 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 program 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.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdio.h> /* printf */
#include <stdarg.h> /* va_list */

#include <alpm.h>

#define BASENAME "testpkg"

static void output_cb(alpm_loglevel_t level, const char *fmt, va_list args)
{
    if(fmt[0] == '\0') {
        return;
    }
    switch(level) {
        case ALPM_LOG_ERROR: printf("error: "); break;
        case ALPM_LOG_WARNING: printf("warning: "); break;
        default: return; /* skip other messages */
    }
    vprintf(fmt, args);
}

int main(int argc, char *argv[])
{
    int retval = 1; /* default = false */
    alpm_handle_t *handle;
    alpm_errno_t err;
    alpm_pkg_t *pkg = NULL;
    const alpm_siglevel_t level = ALPM_SIG_PACKAGE | ALPM_SIG_PACKAGE_OPTIONAL;

    if(argc != 2) {
        fprintf(stderr, "usage: %s <package file>\n", BASENAME);
        return 1;
    }

    handle = alpm_initialize(ROOTDIR, DBPATH, &err);
    if(!handle) {
        fprintf(stderr, "cannot initialize alpm: %s\n", alpm_strerror(err));
        return 1;
    }

    /* let us get log messages from libalpm */
    alpm_option_set_logcb(handle, output_cb);

    if(alpm_pkg_load(handle, argv[1], 1, level, &pkg) == -1
            || pkg == NULL) {
        err = alpm_errno(handle);
        switch(err) {
            case ALPM_ERR_PKG_NOT_FOUND:
                printf("Cannot find the given file.\n");
                break;
            case ALPM_ERR_PKG_OPEN:
                printf("Cannot open the given file.\n");
                break;
            case ALPM_ERR_LIBARCHIVE:
            case ALPM_ERR_PKG_INVALID:
                printf("Package is invalid.\n");
                break;
            default:
                printf("libalpm error: %s\n", alpm_strerror(err));
                break;
        }
        retval = 1;
    } else {
        alpm_pkg_free(pkg);
        printf("Package is valid.\n");
        retval = 0;
    }

    if(alpm_release(handle) == -1) {
        fprintf(stderr, "error releasing alpm\n");
    }

    return retval;
}