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pacman/lib/libalpm/db.c

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/*
* db.c
*
* Copyright (c) 2002-2005 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
#include "config.h"
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/stat.h>
/* pacman */
#include "util.h"
#include "group.h"
#include "cache.h"
#include "db.h"
/* Open a database and return a pmdb_t handle */
pmdb_t *db_open(char *root, char *dbpath, char *treename)
{
pmdb_t *db;
if(root == NULL || dbpath == NULL || treename == NULL) {
return(NULL);
}
MALLOC(db, sizeof(pmdb_t));
MALLOC(db->path, strlen(root)+strlen(dbpath)+strlen(treename)+2);
sprintf(db->path, "%s%s/%s", root, dbpath, treename);
db->dir = opendir(db->path);
if(db->dir == NULL) {
FREE(db->path);
FREE(db);
return(NULL);
}
strncpy(db->treename, treename, sizeof(db->treename)-1);
db->pkgcache = NULL;
db->grpcache = NULL;
return(db);
}
void db_close(pmdb_t *db)
{
if(db == NULL) {
return;
}
if(db->dir) {
closedir(db->dir);
db->dir = NULL;
}
FREE(db->path);
db_free_pkgcache(db);
db_free_grpcache(db);
free(db);
return;
}
int db_create(char *root, char *dbpath, char *treename)
{
char path[PATH_MAX];
if(root == NULL || dbpath == NULL || treename == NULL) {
return(-1);
}
snprintf(path, PATH_MAX, "%s%s/local", root, dbpath);
if(_alpm_makepath(path) != 0) {
return(-1);
}
return(0);
}
void db_rewind(pmdb_t *db)
{
if(db == NULL || db->dir == NULL) {
return;
}
rewinddir(db->dir);
}
pmpkg_t *db_scan(pmdb_t *db, char *target, unsigned int inforeq)
{
struct dirent *ent = NULL;
char name[256];
char *ptr = NULL;
int ret, found = 0;
pmpkg_t *pkg;
if(db == NULL) {
return(NULL);
}
if(target != NULL) {
/* search for a specific package (by name only) */
rewinddir(db->dir);
while(!found && (ent = readdir(db->dir)) != NULL) {
if(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..")) {
continue;
}
strncpy(name, ent->d_name, 255);
/* truncate the string at the second-to-last hyphen, */
/* which will give us the package name */
if((ptr = rindex(name, '-'))) {
*ptr = '\0';
}
if((ptr = rindex(name, '-'))) {
*ptr = '\0';
}
if(!strcmp(name, target)) {
found = 1;
}
}
if(!found) {
return(NULL);
}
} else {
/* normal iteration */
ent = readdir(db->dir);
if(ent == NULL) {
return(NULL);
}
if(!strcmp(ent->d_name, ".")) {
ent = readdir(db->dir);
if(ent == NULL) {
return(NULL);
}
}
if(!strcmp(ent->d_name, "..")) {
ent = readdir(db->dir);
if(ent == NULL) {
return(NULL);
}
}
}
pkg = pkg_new();
if(pkg == NULL) {
return(NULL);
}
ret = db_read(db, ent->d_name, inforeq, pkg);
if(ret == -1) {
FREEPKG(pkg);
}
return(ret == 0 ? pkg : NULL);
}
int db_read(pmdb_t *db, char *name, unsigned int inforeq, pmpkg_t *info)
{
FILE *fp = NULL;
struct stat buf;
char path[PATH_MAX];
char line[512];
if(db == NULL || name == NULL || info == NULL) {
return(-1);
}
snprintf(path, PATH_MAX, "%s/%s", db->path, name);
if(stat(path, &buf)) {
/* directory doesn't exist or can't be opened */
return(-1);
}
/* DESC */
if(inforeq & INFRQ_DESC) {
snprintf(path, PATH_MAX, "%s/%s/desc", db->path, name);
fp = fopen(path, "r");
if(fp == NULL) {
fprintf(stderr, "error: %s: %s\n", path, strerror(errno));
return(-1);
}
while(!feof(fp)) {
if(fgets(line, 256, fp) == NULL) {
break;
}
_alpm_strtrim(line);
if(!strcmp(line, "%NAME%")) {
if(fgets(info->name, sizeof(info->name), fp) == NULL) {
return(-1);
}
_alpm_strtrim(info->name);
} else if(!strcmp(line, "%VERSION%")) {
if(fgets(info->version, sizeof(info->version), fp) == NULL) {
return(-1);
}
_alpm_strtrim(info->version);
} else if(!strcmp(line, "%DESC%")) {
if(fgets(info->desc, sizeof(info->desc), fp) == NULL) {
return(-1);
}
_alpm_strtrim(info->desc);
} else if(!strcmp(line, "%GROUPS%")) {
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
char *s = strdup(line);
info->groups = pm_list_add(info->groups, s);
}
} else if(!strcmp(line, "%URL%")) {
if(fgets(info->url, sizeof(info->url), fp) == NULL) {
return(-1);
}
_alpm_strtrim(info->url);
} else if(!strcmp(line, "%LICENSE%")) {
if(fgets(info->license, sizeof(info->license), fp) == NULL) {
return(-1);
}
_alpm_strtrim(info->license);
} else if(!strcmp(line, "%ARCH%")) {
if(fgets(info->arch, sizeof(info->arch), fp) == NULL) {
return(-1);
}
_alpm_strtrim(info->arch);
} else if(!strcmp(line, "%BUILDDATE%")) {
if(fgets(info->builddate, sizeof(info->builddate), fp) == NULL) {
return(-1);
}
_alpm_strtrim(info->builddate);
} else if(!strcmp(line, "%INSTALLDATE%")) {
if(fgets(info->installdate, sizeof(info->installdate), fp) == NULL) {
return(-1);
}
_alpm_strtrim(info->installdate);
} else if(!strcmp(line, "%PACKAGER%")) {
if(fgets(info->packager, sizeof(info->packager), fp) == NULL) {
return(-1);
}
_alpm_strtrim(info->packager);
} else if(!strcmp(line, "%REASON%")) {
char tmp[32];
if(fgets(tmp, sizeof(tmp), fp) == NULL) {
return(-1);
}
_alpm_strtrim(tmp);
info->reason = atol(tmp);
} else if(!strcmp(line, "%SIZE%")) {
char tmp[32];
if(fgets(tmp, sizeof(tmp), fp) == NULL) {
return(-1);
}
_alpm_strtrim(tmp);
info->size = atol(tmp);
} else if(!strcmp(line, "%CSIZE%")) {
/* NOTE: the CSIZE and SIZE fields both share the "size" field
* in the pkginfo_t struct. This can be done b/c CSIZE
* is currently only used in sync databases, and SIZE is
* only used in local databases.
*/
char tmp[32];
if(fgets(tmp, sizeof(tmp), fp) == NULL) {
return(-1);
}
_alpm_strtrim(tmp);
info->size = atol(tmp);
} else if(!strcmp(line, "%REPLACES%")) {
/* the REPLACES tag is special -- it only appears in sync repositories,
* not the local one. */
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
info->replaces = pm_list_add(info->replaces, strdup(line));
}
} else if(!strcmp(line, "%MD5SUM%")) {
/* MD5SUM tag only appears in sync repositories,
* not the local one. */
if(fgets(info->md5sum, sizeof(info->md5sum), fp) == NULL) {
return(-1);
}
} else if(!strcmp(line, "%FORCE%")) {
/* FORCE tag only appears in sync repositories,
* not the local one. */
info->force = 1;
}
}
fclose(fp);
}
/* FILES */
if(inforeq & INFRQ_FILES) {
snprintf(path, PATH_MAX, "%s/%s/files", db->path, name);
fp = fopen(path, "r");
if(fp == NULL) {
fprintf(stderr, "error: %s: %s\n", path, strerror(errno));
return(-1);
}
while(fgets(line, 256, fp)) {
_alpm_strtrim(line);
if(!strcmp(line, "%FILES%")) {
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
info->files = pm_list_add(info->files, strdup(line));
}
} else if(!strcmp(line, "%BACKUP%")) {
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
info->backup = pm_list_add(info->backup, strdup(line));
}
}
}
fclose(fp);
}
/* DEPENDS */
if(inforeq & INFRQ_DEPENDS) {
snprintf(path, PATH_MAX, "%s/%s/depends", db->path, name);
fp = fopen(path, "r");
if(fp == NULL) {
fprintf(stderr, "error: %s: %s\n", path, strerror(errno));
return(-1);
}
while(!feof(fp)) {
fgets(line, 255, fp);
_alpm_strtrim(line);
if(!strcmp(line, "%DEPENDS%")) {
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
info->depends = pm_list_add(info->depends, strdup(line));
}
} else if(!strcmp(line, "%REQUIREDBY%")) {
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
info->requiredby = pm_list_add(info->requiredby, strdup(line));
}
} else if(!strcmp(line, "%CONFLICTS%")) {
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
info->conflicts = pm_list_add(info->conflicts, strdup(line));
}
} else if(!strcmp(line, "%PROVIDES%")) {
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
info->provides = pm_list_add(info->provides, strdup(line));
}
}
}
fclose(fp);
}
/* INSTALL */
if(inforeq & INFRQ_SCRIPLET) {
snprintf(path, PATH_MAX, "%s/%s/install", db->path, name);
if(!stat(path, &buf)) {
info->scriptlet = 1;
}
}
/* internal */
info->infolevel |= inforeq;
return(0);
}
int db_write(pmdb_t *db, pmpkg_t *info, unsigned int inforeq)
{
char topdir[PATH_MAX];
FILE *fp = NULL;
char path[PATH_MAX];
mode_t oldmask;
PMList *lp = NULL;
if(db == NULL || info == NULL) {
return(-1);
}
snprintf(topdir, PATH_MAX, "%s/%s-%s", db->path,
info->name, info->version);
oldmask = umask(0000);
mkdir(topdir, 0755);
/* make sure we have a sane umask */
umask(0022);
/* DESC */
if(inforeq & INFRQ_DESC) {
snprintf(path, PATH_MAX, "%s/desc", topdir);
if((fp = fopen(path, "w")) == NULL) {
perror("db_write");
umask(oldmask);
return(-1);
}
fputs("%NAME%\n", fp);
fprintf(fp, "%s\n\n", info->name);
fputs("%VERSION%\n", fp);
fprintf(fp, "%s\n\n", info->version);
fputs("%DESC%\n", fp);
fprintf(fp, "%s\n\n", info->desc);
fputs("%GROUPS%\n", fp);
for(lp = info->groups; lp; lp = lp->next) {
fprintf(fp, "%s\n", (char*)lp->data);
}
fprintf(fp, "\n");
fputs("%URL%\n", fp);
fprintf(fp, "%s\n\n", info->url);
fputs("%LICENSE%\n", fp);
fprintf(fp, "%s\n\n", info->license);
fputs("%ARCH%\n", fp);
fprintf(fp, "%s\n\n", info->arch);
fputs("%BUILDDATE%\n", fp);
fprintf(fp, "%s\n\n", info->builddate);
fputs("%INSTALLDATE%\n", fp);
fprintf(fp, "%s\n\n", info->installdate);
fputs("%PACKAGER%\n", fp);
fprintf(fp, "%s\n\n", info->packager);
fputs("%SIZE%\n", fp);
fprintf(fp, "%ld\n\n", info->size);
fputs("%REASON%\n", fp);
fprintf(fp, "%ld\n\n", info->size);
fclose(fp);
}
/* FILES */
if(inforeq & INFRQ_FILES) {
snprintf(path, PATH_MAX, "%s/files", topdir);
if((fp = fopen(path, "w")) == NULL) {
perror("db_write");
umask(oldmask);
return(-1);
}
fputs("%FILES%\n", fp);
for(lp = info->files; lp; lp = lp->next) {
fprintf(fp, "%s\n", (char*)lp->data);
}
fprintf(fp, "\n");
fputs("%BACKUP%\n", fp);
for(lp = info->backup; lp; lp = lp->next) {
fprintf(fp, "%s\n", (char*)lp->data);
}
fprintf(fp, "\n");
fclose(fp);
}
/* DEPENDS */
if(inforeq & INFRQ_DEPENDS) {
snprintf(path, PATH_MAX, "%s/depends", topdir);
if((fp = fopen(path, "w")) == NULL) {
perror("db_write");
umask(oldmask);
return(-1);
}
fputs("%DEPENDS%\n", fp);
for(lp = info->depends; lp; lp = lp->next) {
fprintf(fp, "%s\n", (char*)lp->data);
}
fprintf(fp, "\n");
fputs("%REQUIREDBY%\n", fp);
for(lp = info->requiredby; lp; lp = lp->next) {
fprintf(fp, "%s\n", (char*)lp->data);
}
fprintf(fp, "\n");
fputs("%CONFLICTS%\n", fp);
for(lp = info->conflicts; lp; lp = lp->next) {
fprintf(fp, "%s\n", (char*)lp->data);
}
fprintf(fp, "\n");
fputs("%PROVIDES%\n", fp);
for(lp = info->provides; lp; lp = lp->next) {
fprintf(fp, "%s\n", (char*)lp->data);
}
fprintf(fp, "\n");
fclose(fp);
}
/* INSTALL */
/* nothing needed here (script is automatically extracted) */
umask(oldmask);
return(0);
}
int db_remove(pmdb_t *db, pmpkg_t *info)
{
char topdir[PATH_MAX];
char file[PATH_MAX];
if(db == NULL || info == NULL) {
return(-1);
}
snprintf(topdir, PATH_MAX, "%s/%s-%s", db->path, info->name, info->version);
/* DESC */
snprintf(file, PATH_MAX, "%s/desc", topdir);
unlink(file);
/* FILES */
snprintf(file, PATH_MAX, "%s/files", topdir);
unlink(file);
/* DEPENDS */
snprintf(file, PATH_MAX, "%s/depends", topdir);
unlink(file);
/* INSTALL */
snprintf(file, PATH_MAX, "%s/install", topdir);
unlink(file);
/* Package directory */
if(rmdir(topdir) == -1) {
return(-1);
}
return(0);
}
PMList *db_find_conflicts(pmdb_t *db, PMList *targets, char *root)
{
PMList *i, *j, *k;
char *filestr = NULL;
char path[PATH_MAX+1];
char *str = NULL;
struct stat buf, buf2;
PMList *conflicts = NULL;
if(db == NULL || targets == NULL || root == NULL) {
return(NULL);
}
/* CHECK 1: check every db package against every target package */
/* XXX: I've disabled the database-against-targets check for now, as the
* many many strcmp() calls slow it down heavily and most of the
* checking is redundant to the targets-against-filesystem check.
* This will be re-enabled if I can improve performance significantly.
*
pmpkg_t *info = NULL;
char *dbstr = NULL;
rewinddir(db->dir);
while((info = db_scan(db, NULL, INFRQ_DESC | INFRQ_FILES)) != NULL) {
for(i = info->files; i; i = i->next) {
if(i->data == NULL) continue;
dbstr = (char*)i->data;
for(j = targets; j; j = j->next) {
pmpkg_t *targ = (pmpkg_t*)j->data;
if(strcmp(info->name, targ->name)) {
for(k = targ->files; k; k = k->next) {
filestr = (char*)k->data;
if(!strcmp(dbstr, filestr)) {
if(rindex(k->data, '/') == filestr+strlen(filestr)-1) {
continue;
}
MALLOC(str, 512);
snprintf(str, 512, "%s: exists in \"%s\" (target) and \"%s\" (installed)", dbstr,
targ->name, info->name);
conflicts = pm_list_add(conflicts, str);
}
}
}
}
}
}*/
/* CHECK 2: check every target against every target */
for(i = targets; i; i = i->next) {
pmpkg_t *p1 = (pmpkg_t*)i->data;
for(j = i; j; j = j->next) {
pmpkg_t *p2 = (pmpkg_t*)j->data;
if(strcmp(p1->name, p2->name)) {
for(k = p1->files; k; k = k->next) {
filestr = k->data;
if(!strcmp(filestr, "._install") || !strcmp(filestr, ".INSTALL")) {
continue;
}
if(rindex(filestr, '/') == filestr+strlen(filestr)-1) {
/* this filename has a trailing '/', so it's a directory -- skip it. */
continue;
}
if(pm_list_is_strin(filestr, p2->files)) {
MALLOC(str, 512);
snprintf(str, 512, "%s: exists in \"%s\" (target) and \"%s\" (target)",
filestr, p1->name, p2->name);
conflicts = pm_list_add(conflicts, str);
}
}
}
}
}
/* CHECK 3: check every target against the filesystem */
for(i = targets; i; i = i->next) {
pmpkg_t *p = (pmpkg_t*)i->data;
pmpkg_t *dbpkg = NULL;
for(j = p->files; j; j = j->next) {
filestr = (char*)j->data;
snprintf(path, PATH_MAX, "%s%s", root, filestr);
if(!stat(path, &buf) && !S_ISDIR(buf.st_mode)) {
int ok = 0;
if(dbpkg == NULL) {
dbpkg = db_scan(db, p->name, INFRQ_DESC | INFRQ_FILES);
}
if(dbpkg && pm_list_is_strin(j->data, dbpkg->files)) {
ok = 1;
}
/* Make sure that the supposedly-conflicting file is not actually just
* a symlink that points to a path that used to exist in the package.
*/
/* Check if any part of the conflicting file's path is a symlink */
if(dbpkg && !ok) {
char str[PATH_MAX];
for(k = dbpkg->files; k; k = k->next) {
snprintf(str, PATH_MAX, "%s%s", root, (char*)k->data);
stat(str, &buf2);
if(buf.st_ino == buf2.st_ino) {
ok = 1;
}
}
}
/* Check if the conflicting file has been moved to another package/target */
if(!ok) {
/* Look at all the targets */
for(k = targets; k && !ok; k = k->next) {
pmpkg_t *p1 = (pmpkg_t *)k->data;
/* As long as they're not the current package */
if(strcmp(p1->name, p->name)) {
pmpkg_t *dbpkg2 = NULL;
dbpkg2 = db_scan(db, p1->name, INFRQ_DESC | INFRQ_FILES);
/* If it used to exist in there, but doesn't anymore */
if(dbpkg2 && !pm_list_is_strin(filestr, p1->files) && pm_list_is_strin(filestr, dbpkg2->files)) {
ok = 1;
}
FREEPKG(dbpkg2);
}
}
}
if(!ok) {
MALLOC(str, 512);
snprintf(str, 512, "%s: exists in filesystem", path);
conflicts = pm_list_add(conflicts, str);
}
}
}
FREEPKG(dbpkg);
}
return(conflicts);
}
/* vim: set ts=2 sw=2 noet: */
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