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Old 06-02-2008, 09:56 AM
Xavier
 
Default Get rid of double / in database paths.

>From c69a3efc4d6e08ea967a936afc8f9622e1e6b268 Mon Sep 17 00:00:00 2001
From: Xavier Chantry <shiningxc@gmail.com>
Date: Fri, 30 May 2008 08:52:27 +0200
Subject: [PATCH] Get rid of double / in database paths.

Errors like the following one happen regularly (for unknown reasons...) :
error: could not open file /var/lib/pacman/local//glibc-2.7-9/depends: No
such file or directory

Anyway, every time an user reported an error like that, it always seemed
like he thought the error was caused by the double /, which is obviously
wrong.

Since db->path always include a trailing /, there is no need to add one when
concatenating paths in be_files.c or add.c.
Additionally, some static strings were switched to dynamic.
And the computation of the "dbpath"/"pkgname"-"pkgversion" was refactored
in db_read, db_write and db_remove with a get_pkgpath static function.

Signed-off-by: Xavier Chantry <shiningxc@gmail.com>
---
lib/libalpm/add.c | 4 +-
lib/libalpm/be_files.c | 98 ++++++++++++++++++++++++++++++++----------------
2 files changed, 68 insertions(+), 34 deletions(-)

diff --git a/lib/libalpm/add.c b/lib/libalpm/add.c
index c5454ba..3d53a1c 100644
--- a/lib/libalpm/add.c
+++ b/lib/libalpm/add.c
@@ -287,12 +287,12 @@ static int extract_single_file(struct archive *archive,

if(strcmp(entryname, ".INSTALL") == 0) {
/* the install script goes inside the db */
- snprintf(filename, PATH_MAX, "%s/%s-%s/install", db->path,
+ snprintf(filename, PATH_MAX, "%s%s-%s/install", db->path,
newpkg->name, newpkg->version);
archive_entry_set_mode(entry, 0644);
} else if(strcmp(entryname, ".CHANGELOG") == 0) {
/* the changelog goes inside the db */
- snprintf(filename, PATH_MAX, "%s/%s-%s/changelog", db->path,
+ snprintf(filename, PATH_MAX, "%s%s-%s/changelog", db->path,
newpkg->name, newpkg->version);
archive_entry_set_mode(entry, 0644);
} else if(*entryname == '.') {
diff --git a/lib/libalpm/be_files.c b/lib/libalpm/be_files.c
index 2302374..6eebab7 100644
--- a/lib/libalpm/be_files.c
+++ b/lib/libalpm/be_files.c
@@ -56,6 +56,7 @@ time_t getlastupdate(const pmdb_t *db)
FILE *fp;
char *file;
time_t ret = 0;
+ int len = 0;

ALPM_LOG_FUNC;

@@ -64,8 +65,9 @@ time_t getlastupdate(const pmdb_t *db)
}

/* db->path + '.lastupdate' + NULL */
- MALLOC(file, strlen(db->path) + 12, RET_ERR(PM_ERR_MEMORY, ret));
- sprintf(file, "%s.lastupdate", db->path);
+ len = strlen(db->path) + 12;
+ CALLOC(file, len, sizeof(char), RET_ERR(PM_ERR_MEMORY, ret));
+ snprintf(file, len, "%s.lastupdate", db->path);

/* get the last update time, if it's there */
if((fp = fopen(file, "r")) == NULL) {
@@ -90,6 +92,7 @@ int setlastupdate(const pmdb_t *db, time_t time)
FILE *fp;
char *file;
int ret = 0;
+ int len = 0;

ALPM_LOG_FUNC;

@@ -98,8 +101,9 @@ int setlastupdate(const pmdb_t *db, time_t time)
}

/* db->path + '.lastupdate' + NULL */
- MALLOC(file, strlen(db->path) + 12, RET_ERR(PM_ERR_MEMORY, ret));
- sprintf(file, "%s.lastupdate", db->path);
+ len = strlen(db->path) + 12;
+ CALLOC(file, len, sizeof(char), RET_ERR(PM_ERR_MEMORY, ret));
+ snprintf(file, len, "%s.lastupdate", db->path);

if((fp = fopen(file, "w")) == NULL) {
free(file);
@@ -123,9 +127,11 @@ int setlastupdate(const pmdb_t *db, time_t time)
int SYMEXPORT alpm_db_update(int force, pmdb_t *db)
{
alpm_list_t *lp;
- char path[PATH_MAX];
+ char *dbfile, *dbfilepath;
time_t newmtime = 0, lastupdate = 0;
const char *dbpath;
+ int len;
+
int ret;

ALPM_LOG_FUNC;
@@ -154,11 +160,15 @@ int SYMEXPORT alpm_db_update(int force, pmdb_t *db)
}
}

- snprintf(path, PATH_MAX, "%s" DBEXT, db->treename);
+ len = strlen(db->treename) + strlen(DBEXT) + 1;
+ CALLOC(dbfile, len, sizeof(char), RET_ERR(PM_ERR_MEMORY, -1));
+ snprintf(dbfile, len, "%s" DBEXT, db->treename);
+
dbpath = alpm_option_get_dbpath();

- ret = _alpm_download_single_file(path, db->servers, dbpath,
+ ret = _alpm_download_single_file(dbfile, db->servers, dbpath,
lastupdate, &newmtime);
+ free(dbfile);

if(ret == 1) {
/* mtimes match, do nothing */
@@ -169,9 +179,6 @@ int SYMEXPORT alpm_db_update(int force, pmdb_t *db)
_alpm_log(PM_LOG_DEBUG, "failed to sync db: %s
", alpm_strerrorlast());
return(-1);
} else {
- /* form the path to the db location */
- snprintf(path, PATH_MAX, "%s%s" DBEXT, dbpath, db->treename);
-
/* remove the old dir */
_alpm_log(PM_LOG_DEBUG, "flushing database %s
", db->path);
for(lp = _alpm_db_get_pkgcache(db); lp; lp = lp->next) {
@@ -186,11 +193,19 @@ int SYMEXPORT alpm_db_update(int force, pmdb_t *db)
/* Cache needs to be rebuilt */
_alpm_db_free_pkgcache(db);

+ /* form the path to the db location */
+ len = strlen(dbpath) + strlen(db->treename) + strlen(DBEXT) + 1;
+ CALLOC(dbfilepath, len, sizeof(char), RET_ERR(PM_ERR_MEMORY, -1));
+ snprintf(dbfilepath, len, "%s%s" DBEXT, dbpath, db->treename);
+
/* uncompress the sync database */
- if(_alpm_unpack(path, db->path, NULL)) {
+ ret = _alpm_unpack(dbfilepath, db->path, NULL);
+ if(ret) {
+ free(dbfilepath);
RET_ERR(PM_ERR_SYSTEM, -1);
}
- unlink(path);
+ unlink(dbfilepath);
+ free(dbfilepath);

/* if we have a new mtime, set the DB last update value */
if(newmtime) {
@@ -293,7 +308,7 @@ int _alpm_db_populate(pmdb_t *db)
continue;
}
/* stat the entry, make sure it's a directory */
- snprintf(path, PATH_MAX, "%s/%s", db->path, name);
+ snprintf(path, PATH_MAX, "%s%s", db->path, name);
if(stat(path, &sbuf) != 0 || !S_ISDIR(sbuf.st_mode)) {
continue;
}
@@ -329,12 +344,24 @@ int _alpm_db_populate(pmdb_t *db)
return(count);
}

+
+static char *get_pkgpath(pmdb_t *db, pmpkg_t *info)
+{
+ int len;
+ char *pkgpath;
+ len = strlen(db->path) + strlen(info->name) + strlen(info->version) + 3;
+ CALLOC(pkgpath, len, sizeof(char), RET_ERR(PM_ERR_MEMORY, NULL));
+ snprintf(pkgpath, len, "%s%s-%s/", db->path, info->name, info->version);
+ return(pkgpath);
+}
+
int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
{
FILE *fp = NULL;
struct stat buf;
char path[PATH_MAX];
char line[513];
+ char *pkgpath = NULL;

ALPM_LOG_FUNC;

@@ -367,17 +394,19 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info,
pmdbinfrq_t inforeq)
/* clear out 'line', to be certain - and to make valgrind happy */
memset(line, 0, 513);

- snprintf(path, PATH_MAX, "%s/%s-%s", db->path, info->name, info->version);
- if(stat(path, &buf)) {
+ pkgpath = get_pkgpath(db, info);
+
+ if(stat(pkgpath, &buf)) {
/* directory doesn't exist or can't be opened */
_alpm_log(PM_LOG_DEBUG, "cannot find '%s-%s' in db '%s'
",
info->name, info->version, db->treename);
+ free(pkgpath);
return(-1);
}

/* DESC */
if(inforeq & INFRQ_DESC) {
- snprintf(path, PATH_MAX, "%s/%s-%s/desc", db->path, info->name,
info->version);
+ snprintf(path, PATH_MAX, "%sdesc", pkgpath);
if((fp = fopen(path, "r")) == NULL) {
_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s
"), path,
strerror(errno));
goto error;
@@ -521,7 +550,7 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info,
pmdbinfrq_t inforeq)

/* FILES */
if(inforeq & INFRQ_FILES) {
- snprintf(path, PATH_MAX, "%s/%s-%s/files", db->path, info->name,
info->version);
+ snprintf(path, PATH_MAX, "%sfiles", pkgpath);
if((fp = fopen(path, "r")) == NULL) {
_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s
"), path,
strerror(errno));
goto error;
@@ -548,7 +577,7 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info,
pmdbinfrq_t inforeq)

/* DEPENDS */
if(inforeq & INFRQ_DEPENDS) {
- snprintf(path, PATH_MAX, "%s/%s-%s/depends", db->path, info->name,
info->version);
+ snprintf(path, PATH_MAX, "%sdepends", pkgpath);
if((fp = fopen(path, "r")) == NULL) {
_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s
"), path,
strerror(errno));
goto error;
@@ -587,8 +616,7 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info,
pmdbinfrq_t inforeq)

/* DELTAS */
if(inforeq & INFRQ_DELTAS) {
- snprintf(path, PATH_MAX, "%s/%s-%s/deltas", db->path,
- info->name, info->version);
+ snprintf(path, PATH_MAX, "%sdeltas", pkgpath);
if((fp = fopen(path, "r"))) {
while(!feof(fp)) {
fgets(line, 255, fp);
@@ -606,7 +634,7 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info,
pmdbinfrq_t inforeq)

/* INSTALL */
if(inforeq & INFRQ_SCRIPTLET) {
- snprintf(path, PATH_MAX, "%s/%s-%s/install", db->path, info->name,
info->version);
+ snprintf(path, PATH_MAX, "%sinstall", pkgpath);
if(!stat(path, &buf)) {
info->scriptlet = 1;
}
@@ -632,6 +660,7 @@ int _alpm_db_write(pmdb_t *db, pmpkg_t *info,
pmdbinfrq_t inforeq)
alpm_list_t *lp = NULL;
int retval = 0;
int local = 0;
+ char *pkgpath = NULL;

ALPM_LOG_FUNC;

@@ -639,9 +668,10 @@ int _alpm_db_write(pmdb_t *db, pmpkg_t *info,
pmdbinfrq_t inforeq)
return(-1);
}

- snprintf(path, PATH_MAX, "%s/%s-%s", db->path, info->name, info->version);
+ pkgpath = get_pkgpath(db, info);
+
oldmask = umask(0000);
- mkdir(path, 0755);
+ mkdir(pkgpath, 0755);
/* make sure we have a sane umask */
umask(0022);

@@ -653,7 +683,7 @@ int _alpm_db_write(pmdb_t *db, pmpkg_t *info,
pmdbinfrq_t inforeq)
if(inforeq & INFRQ_DESC) {
_alpm_log(PM_LOG_DEBUG, "writing %s-%s DESC information back to db
",
info->name, info->version);
- snprintf(path, PATH_MAX, "%s/%s-%s/desc", db->path, info->name,
info->version);
+ snprintf(path, PATH_MAX, "%sdesc", pkgpath);
if((fp = fopen(path, "w")) == NULL) {
_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s
"), path,
strerror(errno));
retval = -1;
@@ -741,7 +771,7 @@ int _alpm_db_write(pmdb_t *db, pmpkg_t *info,
pmdbinfrq_t inforeq)
if(local && (inforeq & INFRQ_FILES)) {
_alpm_log(PM_LOG_DEBUG, "writing %s-%s FILES information back to db
",
info->name, info->version);
- snprintf(path, PATH_MAX, "%s/%s-%s/files", db->path, info->name,
info->version);
+ snprintf(path, PATH_MAX, "%sfiles", pkgpath);
if((fp = fopen(path, "w")) == NULL) {
_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s
"), path,
strerror(errno));
retval = -1;
@@ -769,7 +799,7 @@ int _alpm_db_write(pmdb_t *db, pmpkg_t *info,
pmdbinfrq_t inforeq)
if(inforeq & INFRQ_DEPENDS) {
_alpm_log(PM_LOG_DEBUG, "writing %s-%s DEPENDS information back to db
",
info->name, info->version);
- snprintf(path, PATH_MAX, "%s/%s-%s/depends", db->path, info->name,
info->version);
+ snprintf(path, PATH_MAX, "%sdepends", pkgpath);
if((fp = fopen(path, "w")) == NULL) {
_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s
"), path,
strerror(errno));
retval = -1;
@@ -814,6 +844,7 @@ int _alpm_db_write(pmdb_t *db, pmpkg_t *info,
pmdbinfrq_t inforeq)

cleanup:
umask(oldmask);
+ free(pkgpath);

if(fp) {
fclose(fp);
@@ -824,7 +855,8 @@ cleanup:

int _alpm_db_remove(pmdb_t *db, pmpkg_t *info)
{
- char path[PATH_MAX];
+ int ret = 0;
+ char *pkgpath = NULL;

ALPM_LOG_FUNC;

@@ -832,12 +864,14 @@ int _alpm_db_remove(pmdb_t *db, pmpkg_t *info)
RET_ERR(PM_ERR_DB_NULL, -1);
}

- snprintf(path, PATH_MAX, "%s%s-%s", db->path, info->name, info->version);
- if(_alpm_rmrf(path) == -1) {
- return(-1);
- }
+ pkgpath = get_pkgpath(db, info);

- return(0);
+ ret = _alpm_rmrf(pkgpath);
+ free(pkgpath);
+ if(ret != 0) {
+ ret = -1;
+ }
+ return(ret);
}

/* vim: set ts=2 sw=2 noet: */
--
1.5.5.1

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