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pacman/lib/libalpm/trans.c
Dan McGee 64d36db5f4 Move functions out of alpm.c to where they belong
alpm.h is the only "publically viewable" file, so there is no reason to have
functions in alpm.c that belong in package.c, db.c, etc. Move the functions
where they belong and leave only the library init functions in alpm.c.

Signed-off-by: Dan McGee <dan@archlinux.org>
2007-06-04 22:52:04 -04:00

745 lines
19 KiB
C

/*
* 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"
/** \addtogroup alpm_trans Transaction Functions
* @brief Functions to manipulate libalpm transactions
* @{
*/
/** Initialize the transaction.
* @param type type of the transaction
* @param flags flags of the transaction (like nodeps, etc)
* @param event event callback function pointer
* @param conv question callback function pointer
* @param progress progress callback function pointer
* @return 0 on success, -1 on error (pm_errno is set accordingly)
*/
int SYMEXPORT alpm_trans_init(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(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));
ASSERT(handle->trans == NULL, RET_ERR(PM_ERR_TRANS_NOT_NULL, -1));
/* lock db */
handle->lckfd = _alpm_lckmk();
if(handle->lckfd == -1) {
RET_ERR(PM_ERR_HANDLE_LOCK, -1);
}
handle->trans = _alpm_trans_new();
if(handle->trans == NULL) {
RET_ERR(PM_ERR_MEMORY, -1);
}
return(_alpm_trans_init(handle->trans, type, flags, event, conv, progress));
}
/** Search for packages to upgrade and add them to the transaction.
* @return 0 on success, -1 on error (pm_errno is set accordingly)
*/
int SYMEXPORT alpm_trans_sysupgrade()
{
pmtrans_t *trans;
ALPM_LOG_FUNC;
ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));
trans = handle->trans;
ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
ASSERT(trans->state == STATE_INITIALIZED, RET_ERR(PM_ERR_TRANS_NOT_INITIALIZED, -1));
ASSERT(trans->type == PM_TRANS_TYPE_SYNC, RET_ERR(PM_ERR_TRANS_TYPE, -1));
return(_alpm_trans_sysupgrade(trans));
}
/** Add a target to the transaction.
* @param target the name of the target to add
* @return 0 on success, -1 on error (pm_errno is set accordingly)
*/
int SYMEXPORT alpm_trans_addtarget(char *target)
{
pmtrans_t *trans;
ALPM_LOG_FUNC;
/* Sanity checks */
ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));
ASSERT(target != NULL && strlen(target) != 0, RET_ERR(PM_ERR_WRONG_ARGS, -1));
trans = handle->trans;
ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
ASSERT(trans->state == STATE_INITIALIZED, RET_ERR(PM_ERR_TRANS_NOT_INITIALIZED, -1));
return(_alpm_trans_addtarget(trans, target));
}
/** Prepare a transaction.
* @param data the address of an alpm_list where detailed description
* of an error can be dumped (ie. list of conflicting files)
* @return 0 on success, -1 on error (pm_errno is set accordingly)
*/
int SYMEXPORT alpm_trans_prepare(alpm_list_t **data)
{
ALPM_LOG_FUNC;
/* Sanity checks */
ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));
ASSERT(data != NULL, RET_ERR(PM_ERR_WRONG_ARGS, -1));
ASSERT(handle->trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
ASSERT(handle->trans->state == STATE_INITIALIZED, RET_ERR(PM_ERR_TRANS_NOT_INITIALIZED, -1));
return(_alpm_trans_prepare(handle->trans, data));
}
/** Commit a transaction.
* @param data the address of an alpm_list where detailed description
* of an error can be dumped (ie. list of conflicting files)
* @return 0 on success, -1 on error (pm_errno is set accordingly)
*/
int SYMEXPORT alpm_trans_commit(alpm_list_t **data)
{
ALPM_LOG_FUNC;
/* Sanity checks */
ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));
ASSERT(handle->trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
ASSERT(handle->trans->state == STATE_PREPARED, RET_ERR(PM_ERR_TRANS_NOT_PREPARED, -1));
/* Check for database R/W permission */
if(!(handle->trans->flags & PM_TRANS_FLAG_PRINTURIS)) {
/* The print-uris operation is a bit odd. So we explicitly check for it */
ASSERT(handle->access == PM_ACCESS_RW, RET_ERR(PM_ERR_BADPERMS, -1));
}
return(_alpm_trans_commit(handle->trans, data));
}
/** Release a transaction.
* @return 0 on success, -1 on error (pm_errno is set accordingly)
*/
int SYMEXPORT alpm_trans_release()
{
pmtrans_t *trans;
ALPM_LOG_FUNC;
/* Sanity checks */
ASSERT(handle != NULL, RET_ERR(PM_ERR_HANDLE_NULL, -1));
trans = handle->trans;
ASSERT(trans != NULL, RET_ERR(PM_ERR_TRANS_NULL, -1));
ASSERT(trans->state != STATE_IDLE, RET_ERR(PM_ERR_TRANS_NULL, -1));
/* during a commit do not interrupt immediately, just after a target */
if(trans->state == STATE_COMMITING || trans->state == STATE_INTERRUPTED) {
if(trans->state == STATE_COMMITING) {
trans->state = STATE_INTERRUPTED;
}
pm_errno = PM_ERR_TRANS_COMMITING;
return(-1);
}
_alpm_trans_free(trans);
handle->trans = NULL;
/* unlock db */
if(handle->lckfd != -1) {
close(handle->lckfd);
handle->lckfd = -1;
}
if(_alpm_lckrm()) {
_alpm_log(PM_LOG_WARNING, _("could not remove lock file %s"),
alpm_option_get_lockfile());
alpm_logaction(_("warning: could not remove lock file %s"),
alpm_option_get_lockfile());
}
return(0);
}
/** @} */
pmtrans_t *_alpm_trans_new()
{
pmtrans_t *trans;
ALPM_LOG_FUNC;
if((trans = 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);
}
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: */