package.c

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/*
 *  package.c
 *
 *  Copyright (c) 2006-2011 Pacman Development Team <pacman-dev@archlinux.org>
 *  Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
 *
 *  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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <errno.h>
#include <time.h>

#include <alpm.h>
#include <alpm_list.h>

/* pacman */
#include "package.h"
#include "util.h"
#include "conf.h"

#define CLBUF_SIZE 4096

/** Turn a depends list into a text list.
 * @param deps a list with items of type alpm_depend_t
 * @return a string list, must be freed
 */
static void deplist_display(const char *title,
        alpm_list_t *deps)
{
    alpm_list_t *i, *text = NULL;
    for(i = deps; i; i = alpm_list_next(i)) {
        alpm_depend_t *dep = i->data;
        text = alpm_list_add(text, alpm_dep_compute_string(dep));
    }
    list_display(title, text);
    FREELIST(text);
}

/**
 * Display the details of a package.
 * Extra information entails 'required by' info for sync packages and backup
 * files info for local packages.
 * @param pkg package to display information for
 * @param from the type of package we are dealing with
 * @param extra should we show extra information
 */
void dump_pkg_full(alpm_pkg_t *pkg, int extra)
{
    const char *reason;
    time_t bdate, idate;
    char bdatestr[50] = "", idatestr[50] = "";
    const char *label;
    double size;
    alpm_list_t *requiredby = NULL;
    alpm_pkgfrom_t from;

    from = alpm_pkg_get_origin(pkg);

    /* set variables here, do all output below */
    bdate = (time_t)alpm_pkg_get_builddate(pkg);
    if(bdate) {
        strftime(bdatestr, 50, "%c", localtime(&bdate));
    }
    idate = (time_t)alpm_pkg_get_installdate(pkg);
    if(idate) {
        strftime(idatestr, 50, "%c", localtime(&idate));
    }

    switch(alpm_pkg_get_reason(pkg)) {
        case ALPM_PKG_REASON_EXPLICIT:
            reason = _("Explicitly installed");
            break;
        case ALPM_PKG_REASON_DEPEND:
            reason = _("Installed as a dependency for another package");
            break;
        default:
            reason = _("Unknown");
            break;
    }

    if(extra || from == PKG_FROM_LOCALDB) {
        /* compute this here so we don't get a pause in the middle of output */
        requiredby = alpm_pkg_compute_requiredby(pkg);
    }

    /* actual output */
    if(from == PKG_FROM_SYNCDB) {
        string_display(_("Repository     :"),
                alpm_db_get_name(alpm_pkg_get_db(pkg)));
    }
    string_display(_("Name           :"), alpm_pkg_get_name(pkg));
    string_display(_("Version        :"), alpm_pkg_get_version(pkg));
    string_display(_("URL            :"), alpm_pkg_get_url(pkg));
    list_display(_("Licenses       :"), alpm_pkg_get_licenses(pkg));
    list_display(_("Groups         :"), alpm_pkg_get_groups(pkg));
    deplist_display(_("Provides       :"), alpm_pkg_get_provides(pkg));
    deplist_display(_("Depends On     :"), alpm_pkg_get_depends(pkg));
    list_display_linebreak(_("Optional Deps  :"), alpm_pkg_get_optdepends(pkg));
    if(extra || from == PKG_FROM_LOCALDB) {
        list_display(_("Required By    :"), requiredby);
    }
    deplist_display(_("Conflicts With :"), alpm_pkg_get_conflicts(pkg));
    deplist_display(_("Replaces       :"), alpm_pkg_get_replaces(pkg));

    size = humanize_size(alpm_pkg_get_size(pkg), 'K', &label);
    if(from == PKG_FROM_SYNCDB) {
        printf(_("Download Size  : %6.2f %s\n"), size, label);
    } else if(from == PKG_FROM_FILE) {
        printf(_("Compressed Size: %6.2f %s\n"), size, label);
    }

    size = humanize_size(alpm_pkg_get_isize(pkg), 'K', &label);
    printf(_("Installed Size : %6.2f %s\n"), size, label);

    string_display(_("Packager       :"), alpm_pkg_get_packager(pkg));
    string_display(_("Architecture   :"), alpm_pkg_get_arch(pkg));
    string_display(_("Build Date     :"), bdatestr);
    if(from == PKG_FROM_LOCALDB) {
        string_display(_("Install Date   :"), idatestr);
        string_display(_("Install Reason :"), reason);
    }
    if(from == PKG_FROM_FILE || from == PKG_FROM_LOCALDB) {
        string_display(_("Install Script :"),
                alpm_pkg_has_scriptlet(pkg) ?  _("Yes") : _("No"));
    }

    if(from == PKG_FROM_SYNCDB) {
        string_display(_("MD5 Sum        :"), alpm_pkg_get_md5sum(pkg));
        string_display(_("SHA256 Sum     :"), alpm_pkg_get_sha256sum(pkg));
        string_display(_("Signatures     :"),
                alpm_pkg_get_base64_sig(pkg) ? _("Yes") : _("None"));
    }
    if(from == PKG_FROM_FILE) {
        alpm_siglist_t siglist;
        int err = alpm_pkg_check_pgp_signature(pkg, &siglist);
        if(err && alpm_errno(config->handle) == ALPM_ERR_SIG_MISSING) {
            string_display(_("Signatures     :"), _("None"));
        } else if(err) {
            string_display(_("Signatures     :"),
                    alpm_strerror(alpm_errno(config->handle)));
        } else {
            signature_display(_("Signatures     :"), &siglist);
        }
        alpm_siglist_cleanup(&siglist);
    }
    string_display(_("Description    :"), alpm_pkg_get_desc(pkg));

    /* Print additional package info if info flag passed more than once */
    if(from == PKG_FROM_LOCALDB && extra) {
        dump_pkg_backups(pkg);
    }

    /* final newline to separate packages */
    printf("\n");

    FREELIST(requiredby);
}

static const char *get_backup_file_status(const char *root,
        const alpm_backup_t *backup)
{
    char path[PATH_MAX];
    const char *ret;

    snprintf(path, PATH_MAX, "%s%s", root, backup->name);

    /* if we find the file, calculate checksums, otherwise it is missing */
    if(access(path, R_OK) == 0) {
        char *md5sum = alpm_compute_md5sum(path);

        if(md5sum == NULL) {
            pm_printf(ALPM_LOG_ERROR,
                    _("could not calculate checksums for %s\n"), path);
            return NULL;
        }

        /* if checksums don't match, file has been modified */
        if(strcmp(md5sum, backup->hash) != 0) {
            ret = "MODIFIED";
        } else {
            ret = "UNMODIFIED";
        }
        free(md5sum);
    } else {
        switch(errno) {
            case EACCES:
                ret = "UNREADABLE";
                break;
            case ENOENT:
                ret = "MISSING";
                break;
            default:
                ret = "UNKNOWN";
        }
    }
    return ret;
}

/* Display list of backup files and their modification states
 */
void dump_pkg_backups(alpm_pkg_t *pkg)
{
    alpm_list_t *i;
    const char *root = alpm_option_get_root(config->handle);
    printf(_("Backup Files:\n"));
    if(alpm_pkg_get_backup(pkg)) {
        /* package has backup files, so print them */
        for(i = alpm_pkg_get_backup(pkg); i; i = alpm_list_next(i)) {
            const alpm_backup_t *backup = i->data;
            const char *value;
            if(!backup->hash) {
                continue;
            }
            value = get_backup_file_status(root, backup);
            printf("%s\t%s%s\n", value, root, backup->name);
        }
    } else {
        /* package had no backup files */
        printf(_("(none)\n"));
    }
}

/* List all files contained in a package
 */
void dump_pkg_files(alpm_pkg_t *pkg, int quiet)
{
    const char *pkgname, *root;
    alpm_filelist_t *pkgfiles;
    size_t i;

    pkgname = alpm_pkg_get_name(pkg);
    pkgfiles = alpm_pkg_get_files(pkg);
    root = alpm_option_get_root(config->handle);

    for(i = 0; i < pkgfiles->count; i++) {
        const alpm_file_t *file = pkgfiles->files + i;
        /* Regular: '<pkgname> <root><filepath>\n'
         * Quiet  : '<root><filepath>\n'
         */
        if(!quiet) {
            fputs(pkgname, stdout);
            putchar(' ');
        }
        fputs(root, stdout);
        fputs(file->name, stdout);
        putchar('\n');
    }

    fflush(stdout);
}

/* Display the changelog of a package
 */
void dump_pkg_changelog(alpm_pkg_t *pkg)
{
    void *fp = NULL;

    if((fp = alpm_pkg_changelog_open(pkg)) == NULL) {
        pm_printf(ALPM_LOG_ERROR, _("no changelog available for '%s'.\n"),
                alpm_pkg_get_name(pkg));
        return;
    } else {
        /* allocate a buffer to get the changelog back in chunks */
        char buf[CLBUF_SIZE];
        size_t ret = 0;
        while((ret = alpm_pkg_changelog_read(buf, CLBUF_SIZE, pkg, fp))) {
            if(ret < CLBUF_SIZE) {
                /* if we hit the end of the file, we need to add a null terminator */
                *(buf + ret) = '\0';
            }
            fputs(buf, stdout);
        }
        alpm_pkg_changelog_close(pkg, fp);
        putchar('\n');
    }
}

/* vim: set ts=2 sw=2 noet: */