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pacman/lib/libalpm/diskspace.c

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/*
* diskspace.c
*
* Copyright (c) 2010 Pacman Development Team <pacman-dev@archlinux.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 "config.h"
#if defined(HAVE_MNTENT_H)
#include <mntent.h>
#endif
#if defined(HAVE_SYS_STATVFS_H)
#include <sys/statvfs.h>
#endif
#if defined(HAVE_SYS_PARAM_H)
#include <sys/param.h>
#endif
#if defined(HAVE_SYS_MOUNT_H)
#include <sys/mount.h>
#endif
#if defined(HAVE_SYS_UCRED_H)
#include <sys/ucred.h>
#endif
#if defined(HAVE_SYS_TYPES_H)
#include <sys/types.h>
#endif
#include <math.h>
/* libarchive */
#include <archive.h>
#include <archive_entry.h>
/* libalpm */
#include "diskspace.h"
#include "alpm_list.h"
#include "util.h"
#include "log.h"
#include "trans.h"
#include "handle.h"
static int mount_point_cmp(const alpm_mountpoint_t *mp1, const alpm_mountpoint_t *mp2)
{
return(strcmp(mp1->mount_dir, mp2->mount_dir));
}
static alpm_list_t *mount_point_list()
{
alpm_list_t *mount_points = NULL;
alpm_mountpoint_t *mp;
#if defined HAVE_GETMNTENT
struct mntent *mnt;
FILE *fp;
FSSTATSTYPE fsp;
fp = setmntent(MOUNTED, "r");
if (fp == NULL) {
return NULL;
}
while((mnt = getmntent (fp))) {
if(statvfs(mnt->mnt_dir, &fsp) != 0) {
_alpm_log(PM_LOG_WARNING, "could not get filesystem information for %s\n", mnt->mnt_dir);
continue;
}
MALLOC(mp, sizeof(alpm_mountpoint_t), RET_ERR(PM_ERR_MEMORY, NULL));
mp->mount_dir = strdup(mnt->mnt_dir);
MALLOC(mp->fsp, sizeof(FSSTATSTYPE), RET_ERR(PM_ERR_MEMORY, NULL));
memcpy((void *)(mp->fsp), (void *)(&fsp), sizeof(FSSTATSTYPE));
mp->blocks_needed = 0;
mp->max_blocks_needed = 0;
mp->used = 0;
mount_points = alpm_list_add(mount_points, mp);
}
endmntent(fp);
#elif defined HAVE_GETMNTINFO
int entries;
FSSTATSTYPE *fsp;
entries = getmntinfo(&fsp, MNT_NOWAIT);
if (entries < 0) {
return NULL;
}
for(; entries-- > 0; fsp++) {
MALLOC(mp, sizeof(alpm_mountpoint_t), RET_ERR(PM_ERR_MEMORY, NULL));
mp->mount_dir = strdup(fsp->f_mntonname);
MALLOC(mp->fsp, sizeof(FSSTATSTYPE), RET_ERR(PM_ERR_MEMORY, NULL));
memcpy((void *)(mp->fsp), (void *)fsp, sizeof(FSSTATSTYPE));
mp->blocks_needed = 0;
mp->max_blocks_needed = 0;
mount_points = alpm_list_add(mount_points, mp);
}
#endif
mount_points = alpm_list_msort(mount_points, alpm_list_count(mount_points),
(alpm_list_fn_cmp)mount_point_cmp);
return(mount_points);
}
static alpm_list_t *match_mount_point(const alpm_list_t *mount_points, const char *file)
{
char real_path[PATH_MAX];
snprintf(real_path, PATH_MAX, "%s%s", handle->root, file);
alpm_list_t *mp = alpm_list_last(mount_points);
do {
alpm_mountpoint_t *data = mp->data;
if(strncmp(data->mount_dir, real_path, strlen(data->mount_dir)) == 0) {
return mp;
}
mp = mp->prev;
} while (mp != alpm_list_last(mount_points));
/* should not get here... */
return NULL;
}
static int calculate_removed_size(pmpkg_t *pkg, const alpm_list_t *mount_points)
{
alpm_list_t *file;
alpm_list_t *files = alpm_pkg_get_files(pkg);
for(file = files; file; file = file->next) {
alpm_list_t *mp;
alpm_mountpoint_t *data;
struct stat st;
char path[PATH_MAX];
/* skip directories to be consistent with libarchive that reports them to be zero size
and to prevent multiple counting across packages */
if(*((char *)(file->data) + strlen(file->data) - 1) == '/') {
continue;
}
mp = match_mount_point(mount_points, file->data);
if(mp == NULL) {
_alpm_log(PM_LOG_WARNING, _("could not determine mount point for file %s"), (char *)(file->data));
continue;
}
snprintf(path, PATH_MAX, "%s%s", handle->root, (char *)file->data);
_alpm_lstat(path, &st);
/* skip symlinks to be consistent with libarchive that reports them to be zero size */
if(S_ISLNK(st.st_mode)) {
continue;
}
data = mp->data;
data->blocks_needed -= ceil((double)(st.st_size) /
(double)(data->fsp->f_bsize));
data->used = 1;
}
return 0;
}
static int calculate_installed_size(pmpkg_t *pkg, const alpm_list_t *mount_points)
{
int ret=0;
struct archive *archive;
struct archive_entry *entry;
const char *file;
if ((archive = archive_read_new()) == NULL) {
pm_errno = PM_ERR_LIBARCHIVE;
ret = -1;
goto cleanup;
}
archive_read_support_compression_all(archive);
archive_read_support_format_all(archive);
if(archive_read_open_filename(archive, pkg->origin_data.file,
ARCHIVE_DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK) {
pm_errno = PM_ERR_PKG_OPEN;
ret = -1;
goto cleanup;
}
while(archive_read_next_header(archive, &entry) == ARCHIVE_OK) {
alpm_list_t *mp;
alpm_mountpoint_t *data;
file = archive_entry_pathname(entry);
/* approximate space requirements for db entries */
if(strcmp(file, ".PKGINFO") == 0 ||
strcmp(file, ".INSTALL") == 0 ||
strcmp(file, ".CHANGELOG") == 0) {
file = alpm_option_get_dbpath();
}
mp = match_mount_point(mount_points, file);
if(mp == NULL) {
_alpm_log(PM_LOG_WARNING, _("could not determine mount point for file %s"), archive_entry_pathname(entry));
continue;
}
data = mp->data;
data->blocks_needed += ceil((double)(archive_entry_size(entry)) /
(double)(data->fsp->f_bsize));
data->used = 1;
}
archive_read_finish(archive);
cleanup:
return ret;
}
int _alpm_check_diskspace(pmtrans_t *trans, pmdb_t *db)
{
alpm_list_t *mount_points, *i;
int replaces = 0, abort = 0;
alpm_list_t *targ;
pmpkg_t *pkg;
int numtargs = alpm_list_count(trans->add);
int current = 0;
mount_points = mount_point_list();
if(mount_points == NULL) {
_alpm_log(PM_LOG_ERROR, _("count not determine filesystem mount points"));
return -1;
}
replaces = alpm_list_count(trans->remove);
if(replaces) {
numtargs += replaces;
for(targ = trans->remove; targ; targ = targ->next, current++) {
double percent = (double)current / numtargs;
PROGRESS(trans, PM_TRANS_PROGRESS_DISKSPACE_START, "", (percent * 100),
numtargs, current);
pkg = (pmpkg_t*)targ->data;
calculate_removed_size(pkg, mount_points);
}
}
for(targ = trans->add; targ; targ = targ->next, current++) {
double percent = (double)current / numtargs;
PROGRESS(trans, PM_TRANS_PROGRESS_DISKSPACE_START, "", (percent * 100),
numtargs, current);
pkg = (pmpkg_t*)targ->data;
if(_alpm_db_get_pkgfromcache(db, pkg->name)) {
calculate_removed_size(pkg, mount_points);
}
calculate_installed_size(pkg, mount_points);
for(i = mount_points; i; i = alpm_list_next(i)) {
alpm_mountpoint_t *data = i->data;
if(data->blocks_needed > data->max_blocks_needed) {
data->max_blocks_needed = data->blocks_needed;
}
}
}
PROGRESS(trans, PM_TRANS_PROGRESS_DISKSPACE_START, "", 100,
numtargs, current);
for(i = mount_points; i; i = alpm_list_next(i)) {
alpm_mountpoint_t *data = i->data;
if(data->used == 1) {
_alpm_log(PM_LOG_DEBUG, "partition %s, needed %ld, free %ld\n",
data->mount_dir, data->max_blocks_needed, (long int)(data->fsp->f_bfree));
if(data->max_blocks_needed > data->fsp->f_bfree) {
abort = 1;
}
}
}
for(i = mount_points; i; i = alpm_list_next(i)) {
alpm_mountpoint_t *data = i->data;
FREE(data->mount_dir);
FREE(data->fsp);
}
FREELIST(mount_points);
if(abort) {
RET_ERR(PM_ERR_DISK_SPACE, -1);
}
return 0;
}
/* vim: set ts=2 sw=2 noet: */
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