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pacman/lib/libalpm/trans.c

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/*
* trans.c
*
* Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
* Copyright (c) 2005 by Aurelien Foret <orelien@chez.com>
* Copyright (c) 2005 by Christian Hamar <krics@linuxforum.hu>
* Copyright (c) 2005, 2006 by Miklos Vajna <vmiklos@frugalware.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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/wait.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <unistd.h>
#include <errno.h>
#ifndef __sun__
#include <mntent.h>
#endif
/* libalpm */
#include "trans.h"
#include "alpm_list.h"
#include "error.h"
#include "package.h"
#include "util.h"
#include "log.h"
#include "handle.h"
#include "add.h"
#include "remove.h"
#include "sync.h"
#include "alpm.h"
#include "deps.h"
#include "cache.h"
#include "provide.h"
pmtrans_t *_alpm_trans_new()
{
pmtrans_t *trans;
ALPM_LOG_FUNC;
if((trans = (pmtrans_t *)malloc(sizeof(pmtrans_t))) == NULL) {
_alpm_log(PM_LOG_ERROR, _("malloc failure: could not allocate %d bytes"), sizeof(pmtrans_t));
return(NULL);
}
trans->targets = NULL;
trans->packages = NULL;
trans->skip_add = NULL;
trans->skip_remove = NULL;
trans->type = 0;
trans->flags = 0;
trans->cb_event = NULL;
trans->cb_conv = NULL;
trans->cb_progress = NULL;
trans->state = STATE_IDLE;
return(trans);
}
void _alpm_trans_free(pmtrans_t *trans)
{
ALPM_LOG_FUNC;
if(trans == NULL) {
return;
}
FREELIST(trans->targets);
if(trans->type == PM_TRANS_TYPE_SYNC) {
alpm_list_t *i;
for(i = trans->packages; i; i = alpm_list_next(i)) {
_alpm_sync_free(i->data);
i->data = NULL;
}
FREELIST(trans->packages);
} else {
alpm_list_t *tmp;
for(tmp = trans->packages; tmp; tmp = alpm_list_next(tmp)) {
_alpm_pkg_free(tmp->data);
tmp->data = NULL;
}
}
trans->packages = NULL;
FREELIST(trans->skip_add);
FREELIST(trans->skip_remove);
FREE(trans);
}
int _alpm_trans_init(pmtrans_t *trans, pmtranstype_t type, pmtransflag_t flags,
alpm_trans_cb_event event, alpm_trans_cb_conv conv,
alpm_trans_cb_progress progress)
{
ALPM_LOG_FUNC;
/* Sanity checks */
ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
trans->type = type;
trans->flags = flags;
trans->cb_event = event;
trans->cb_conv = conv;
trans->cb_progress = progress;
trans->state = STATE_INITIALIZED;
return(0);
}
int _alpm_trans_sysupgrade(pmtrans_t *trans)
{
ALPM_LOG_FUNC;
/* Sanity checks */
ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
return(_alpm_sync_sysupgrade(trans, handle->db_local, handle->dbs_sync));
}
int _alpm_trans_addtarget(pmtrans_t *trans, char *target)
{
ALPM_LOG_FUNC;
/* Sanity checks */
ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
ASSERT(target != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1));
if(alpm_list_find_str(trans->targets, target)) {
return(0);
//RET_ERR(PM_ERR_TRANS_DUP_TARGET, -1);
}
switch(trans->type) {
case PM_TRANS_TYPE_ADD:
case PM_TRANS_TYPE_UPGRADE:
if(_alpm_add_loadtarget(trans, handle->db_local, target) == -1) {
/* pm_errno is set by _alpm_add_loadtarget() */
return(-1);
}
break;
case PM_TRANS_TYPE_REMOVE:
if(_alpm_remove_loadtarget(trans, handle->db_local, target) == -1) {
/* pm_errno is set by remove_loadtarget() */
return(-1);
}
break;
case PM_TRANS_TYPE_SYNC:
if(_alpm_sync_addtarget(trans, handle->db_local, handle->dbs_sync, target) == -1) {
/* pm_errno is set by sync_loadtarget() */
return(-1);
}
break;
}
trans->targets = alpm_list_add(trans->targets, strdup(target));
return(0);
}
int _alpm_trans_prepare(pmtrans_t *trans, alpm_list_t **data)
{
*data = NULL;
ALPM_LOG_FUNC;
/* Sanity checks */
ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
/* If there's nothing to do, return without complaining */
if(trans->packages == NULL) {
return(0);
}
switch(trans->type) {
case PM_TRANS_TYPE_ADD:
case PM_TRANS_TYPE_UPGRADE:
if(_alpm_add_prepare(trans, handle->db_local, data) == -1) {
/* pm_errno is set by _alpm_add_prepare() */
return(-1);
}
break;
case PM_TRANS_TYPE_REMOVE:
if(_alpm_remove_prepare(trans, handle->db_local, data) == -1) {
/* pm_errno is set by _alpm_remove_prepare() */
return(-1);
}
break;
case PM_TRANS_TYPE_SYNC:
if(_alpm_sync_prepare(trans, handle->db_local, handle->dbs_sync, data) == -1) {
/* pm_errno is set by _alpm_sync_prepare() */
return(-1);
}
break;
}
trans->state = STATE_PREPARED;
return(0);
}
int _alpm_trans_commit(pmtrans_t *trans, alpm_list_t **data)
{
ALPM_LOG_FUNC;
if(data!=NULL)
*data = NULL;
/* Sanity checks */
ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
/* If there's nothing to do, return without complaining */
if(trans->packages == NULL) {
return(0);
}
trans->state = STATE_COMMITING;
switch(trans->type) {
case PM_TRANS_TYPE_ADD:
case PM_TRANS_TYPE_UPGRADE:
if(_alpm_add_commit(trans, handle->db_local) == -1) {
/* pm_errno is set by _alpm_add_prepare() */
return(-1);
}
break;
case PM_TRANS_TYPE_REMOVE:
if(_alpm_remove_commit(trans, handle->db_local) == -1) {
/* pm_errno is set by _alpm_remove_prepare() */
return(-1);
}
break;
case PM_TRANS_TYPE_SYNC:
if(_alpm_sync_commit(trans, handle->db_local, data) == -1) {
/* pm_errno is set by _alpm_sync_commit() */
return(-1);
}
break;
}
trans->state = STATE_COMMITED;
return(0);
}
int _alpm_trans_update_depends(pmtrans_t *trans, pmpkg_t *pkg)
{
alpm_list_t *i, *j;
alpm_list_t *depends = NULL;
const char *pkgname;
pmdb_t *localdb;
ALPM_LOG_FUNC;
/* Sanity checks */
ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
ASSERT(pkg != NULL, RET_ERR(PM_ERR_PKG_INVALID, -1));
pkgname = alpm_pkg_get_name(pkg);
depends = alpm_pkg_get_depends(pkg);
if(depends) {
_alpm_log(PM_LOG_DEBUG, _("updating dependency packages 'requiredby' fields for %s-%s"),
pkgname, pkg->version);
} else {
_alpm_log(PM_LOG_DEBUG, _("package has no dependencies, no other packages to update"));
}
localdb = alpm_option_get_localdb();
for(i = depends; i; i = i->next) {
pmdepend_t* dep = alpm_splitdep(i->data);
if(dep == NULL) {
continue;
}
if(trans->packages && trans->type == PM_TRANS_TYPE_REMOVE) {
if(_alpm_pkg_find(dep->name, handle->trans->packages)) {
continue;
}
}
pmpkg_t *deppkg = _alpm_db_get_pkgfromcache(localdb, dep->name);
if(!deppkg) {
int found_provides = 0;
/* look for a provides package */
alpm_list_t *provides = _alpm_db_whatprovides(localdb, dep->name);
for(j = provides; j; j = j->next) {
if(!j->data) {
continue;
}
pmpkg_t *provpkg = j->data;
deppkg = _alpm_db_get_pkgfromcache(localdb, alpm_pkg_get_name(provpkg));
if(!deppkg) {
continue;
}
found_provides = 1;
/* this is cheating... we call this function to populate the package */
alpm_list_t *rqdby = alpm_pkg_get_requiredby(deppkg);
_alpm_log(PM_LOG_DEBUG, _("updating 'requiredby' field for package '%s'"),
alpm_pkg_get_name(deppkg));
if(trans->type == PM_TRANS_TYPE_REMOVE) {
void *data = NULL;
rqdby = alpm_list_remove(rqdby, pkgname, _alpm_str_cmp, &data);
FREE(data);
deppkg->requiredby = rqdby;
} else {
if(!alpm_list_find_str(rqdby, pkgname)) {
rqdby = alpm_list_add(rqdby, strdup(pkgname));
deppkg->requiredby = rqdby;
}
}
if(_alpm_db_write(localdb, deppkg, INFRQ_DEPENDS)) {
_alpm_log(PM_LOG_ERROR, _("could not update 'requiredby' database entry %s-%s"),
alpm_pkg_get_name(deppkg), alpm_pkg_get_version(deppkg));
}
}
alpm_list_free(provides);
if(!found_provides) {
_alpm_log(PM_LOG_DEBUG, _("could not find dependency '%s'"), dep->name);
continue;
}
}
/* this is cheating... we call this function to populate the package */
alpm_list_t *rqdby = alpm_pkg_get_requiredby(deppkg);
_alpm_log(PM_LOG_DEBUG, _("updating 'requiredby' field for package '%s'"),
alpm_pkg_get_name(deppkg));
if(trans->type == PM_TRANS_TYPE_REMOVE) {
void *data = NULL;
rqdby = alpm_list_remove(rqdby, pkgname, _alpm_str_cmp, &data);
FREE(data);
deppkg->requiredby = rqdby;
} else {
if(!alpm_list_find_str(rqdby, pkgname)) {
rqdby = alpm_list_add(rqdby, strdup(pkgname));
deppkg->requiredby = rqdby;
}
}
if(_alpm_db_write(localdb, deppkg, INFRQ_DEPENDS)) {
_alpm_log(PM_LOG_ERROR, _("could not update 'requiredby' database entry %s-%s"),
alpm_pkg_get_name(deppkg), alpm_pkg_get_version(deppkg));
}
free(dep);
}
return(0);
}
/* A cheap grep for text files, returns 1 if a substring
* was found in the text file fn, 0 if it wasn't
*/
static int grep(const char *fn, const char *needle)
{
FILE *fp;
if((fp = fopen(fn, "r")) == NULL) {
return(0);
}
while(!feof(fp)) {
char line[1024];
fgets(line, 1024, fp);
if(feof(fp)) {
continue;
}
if(strstr(line, needle)) {
fclose(fp);
return(1);
}
}
fclose(fp);
return(0);
}
int _alpm_runscriptlet(const char *root, const char *installfn,
const char *script, const char *ver,
const char *oldver, pmtrans_t *trans)
{
char scriptfn[PATH_MAX];
char cmdline[PATH_MAX];
char tmpdir[PATH_MAX] = "";
char *scriptpath;
struct stat buf;
char cwd[PATH_MAX] = "";
pid_t pid;
int retval = 0;
ALPM_LOG_FUNC;
if(stat(installfn, &buf)) {
/* not found */
_alpm_log(PM_LOG_DEBUG, "scriptlet '%s' not found", installfn);
return(0);
}
if(!strcmp(script, "pre_upgrade") || !strcmp(script, "pre_install")) {
snprintf(tmpdir, PATH_MAX, "%stmp/", root);
if(stat(tmpdir, &buf)) {
_alpm_makepath(tmpdir);
}
snprintf(tmpdir, PATH_MAX, "%stmp/alpm_XXXXXX", root);
if(mkdtemp(tmpdir) == NULL) {
_alpm_log(PM_LOG_ERROR, _("could not create temp directory"));
return(1);
}
_alpm_unpack(installfn, tmpdir, ".INSTALL");
snprintf(scriptfn, PATH_MAX, "%s/.INSTALL", tmpdir);
/* chop off the root so we can find the tmpdir in the chroot */
scriptpath = scriptfn + strlen(root) - 1;
} else {
strncpy(scriptfn, installfn, PATH_MAX);
/* chop off the root so we can find the tmpdir in the chroot */
scriptpath = scriptfn + strlen(root) - 1;
}
if(!grep(scriptfn, script)) {
/* script not found in scriptlet file */
goto cleanup;
}
/* save the cwd so we can restore it later */
if(getcwd(cwd, PATH_MAX) == NULL) {
_alpm_log(PM_LOG_ERROR, _("could not get current working directory"));
/* in case of error, cwd content is undefined: so we set it to something */
cwd[0] = 0;
}
/* just in case our cwd was removed in the upgrade operation */
if(chdir(root) != 0) {
_alpm_log(PM_LOG_ERROR, _("could not change directory to %s (%s)"), root, strerror(errno));
goto cleanup;
}
_alpm_log(PM_LOG_DEBUG, _("executing %s script..."), script);
if(oldver) {
snprintf(cmdline, PATH_MAX, "source %s %s %s %s",
scriptpath, script, ver, oldver);
} else {
snprintf(cmdline, PATH_MAX, "source %s %s %s",
scriptpath, script, ver);
}
_alpm_log(PM_LOG_DEBUG, "%s", cmdline);
pid = fork();
if(pid == -1) {
_alpm_log(PM_LOG_ERROR, _("could not fork a new process (%s)"), strerror(errno));
retval = 1;
goto cleanup;
}
if(pid == 0) {
FILE *pp;
_alpm_log(PM_LOG_DEBUG, _("chrooting in %s"), root);
if(chroot(root) != 0) {
_alpm_log(PM_LOG_ERROR, _("could not change the root directory (%s)"), strerror(errno));
return(1);
}
if(chdir("/") != 0) {
_alpm_log(PM_LOG_ERROR, _("could not change directory to / (%s)"), strerror(errno));
return(1);
}
umask(0022);
_alpm_log(PM_LOG_DEBUG, _("executing \"%s\""), cmdline);
pp = popen(cmdline, "r");
if(!pp) {
_alpm_log(PM_LOG_ERROR, _("call to popen failed (%s)"), strerror(errno));
retval = 1;
goto cleanup;
}
while(!feof(pp)) {
char line[1024];
if(fgets(line, 1024, pp) == NULL)
break;
/*TODO clean this code up, remove weird SCRIPTLET_START/DONE,
* (void*)atol call, etc. */
/* "START <event desc>" */
if((strlen(line) > strlen(SCRIPTLET_START))
&& !strncmp(line, SCRIPTLET_START, strlen(SCRIPTLET_START))) {
EVENT(trans, PM_TRANS_EVT_SCRIPTLET_START,
_alpm_strtrim(line + strlen(SCRIPTLET_START)), NULL);
/* "DONE <ret code>" */
} else if((strlen(line) > strlen(SCRIPTLET_DONE))
&& !strncmp(line, SCRIPTLET_DONE, strlen(SCRIPTLET_DONE))) {
EVENT(trans, PM_TRANS_EVT_SCRIPTLET_DONE,
(void*)atol(_alpm_strtrim(line + strlen(SCRIPTLET_DONE))),
NULL);
} else {
_alpm_strtrim(line);
/* log our script output */
alpm_logaction(line);
EVENT(trans, PM_TRANS_EVT_SCRIPTLET_INFO, line, NULL);
}
}
pclose(pp);
exit(0);
} else {
if(waitpid(pid, 0, 0) == -1) {
_alpm_log(PM_LOG_ERROR, _("call to waitpid failed (%s)"),
strerror(errno));
retval = 1;
goto cleanup;
}
}
cleanup:
if(strlen(tmpdir) && _alpm_rmrf(tmpdir)) {
_alpm_log(PM_LOG_WARNING, _("could not remove tmpdir %s"), tmpdir);
}
if(strlen(cwd)) {
chdir(cwd);
}
return(retval);
}
#ifndef __sun__
static long long get_freespace()
{
struct mntent *mnt;
const char *table = MOUNTED;
FILE *fp;
long long ret=0;
if((fp = setmntent(table, "r")) == NULL) {
_alpm_log(PM_LOG_ERROR, _("cannot read disk space information from %s: %s"),
table, strerror(errno));
return(-1);
}
while ((mnt = getmntent(fp)))
{
struct statvfs64 buf;
statvfs64(mnt->mnt_dir, &buf);
ret += buf.f_bavail * buf.f_bsize;
}
endmntent(fp);
return(ret);
}
int _alpm_check_freespace(pmtrans_t *trans, alpm_list_t **data)
{
alpm_list_t *i;
long long pkgsize=0, freespace;
ALPM_LOG_FUNC;
for(i = trans->packages; i; i = i->next) {
if(trans->type == PM_TRANS_TYPE_SYNC)
{
pmsyncpkg_t *sync = i->data;
if(sync->type != PM_SYNC_TYPE_REPLACE) {
pmpkg_t *pkg = sync->pkg;
pkgsize += alpm_pkg_get_isize(pkg);
}
}
else
{
pmpkg_t *pkg = i->data;
pkgsize += alpm_pkg_get_size(pkg);
}
}
freespace = get_freespace();
_alpm_log(PM_LOG_DEBUG, _("check_freespace: total pkg size: %lld, disk space: %lld"), pkgsize, freespace);
if(pkgsize > freespace) {
if(data) {
long long *ptr;
if((ptr = (long long*)malloc(sizeof(long long)))==NULL) {
_alpm_log(PM_LOG_ERROR, _("malloc failure: could not allocate %d bytes"), sizeof(long long));
pm_errno = PM_ERR_MEMORY;
return(-1);
}
*ptr = pkgsize;
*data = alpm_list_add(*data, ptr);
if((ptr = (long long*)malloc(sizeof(long long)))==NULL) {
_alpm_log(PM_LOG_ERROR, _("malloc failure: could not allocate %d bytes"), sizeof(long long));
FREELIST(*data);
pm_errno = PM_ERR_MEMORY;
return(-1);
}
*ptr = freespace;
*data = alpm_list_add(*data, ptr);
}
pm_errno = PM_ERR_DISK_FULL;
return(-1);
}
else {
return(0);
}
}
#endif
pmtranstype_t SYMEXPORT alpm_trans_get_type()
{
/* Sanity checks */
ASSERT(handle != NULL, return(-1));
ASSERT(handle->trans != NULL, return(-1));
return handle->trans->type;
}
unsigned int SYMEXPORT alpm_trans_get_flags()
{
/* Sanity checks */
ASSERT(handle != NULL, return(-1));
ASSERT(handle->trans != NULL, return(-1));
return handle->trans->flags;
}
alpm_list_t SYMEXPORT * alpm_trans_get_targets()
{
/* Sanity checks */
ASSERT(handle != NULL, return(NULL));
ASSERT(handle->trans != NULL, return(NULL));
return handle->trans->targets;
}
alpm_list_t SYMEXPORT * alpm_trans_get_pkgs()
{
/* Sanity checks */
ASSERT(handle != NULL, return(NULL));
ASSERT(handle->trans != NULL, return(NULL));
return handle->trans->packages;
}
/* vim: set ts=2 sw=2 noet: */
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