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authorAndrew Gregory <andrew.gregory.8@gmail.com>2012-09-08 23:14:19 +0200
committerAllan McRae <allan@archlinux.org>2013-01-04 12:49:38 +0100
commit9c160cf3f3cbda5fe5b6188e9e31775b71fc5bab (patch)
tree30dc023446cd3da983e10e66a0895f1f7cdc410d
parent7a83cd003a064a067a510514b62686c3e972fede (diff)
downloadpacman-9c160cf3f3cbda5fe5b6188e9e31775b71fc5bab.tar.gz
pacman-9c160cf3f3cbda5fe5b6188e9e31775b71fc5bab.tar.xz
Allow querying directory ownership
The restriction of not checking the ownership of a directory is unnecessary given that all the package filelists contain this information. Remove this restriction, with the expectation that you might get multiple packages returned for a given directory. Additionally attempt to minimise the number of files getting through to the slow realpath call. Original-work-by: Dan McGee <dan@archlinux.org> Original-work-by: Allan McRae <allan@archlinux.org> Signed-off-by: Andrew Gregory <andrew.gregory.8@gmail.com> Signed-off-by: Allan McRae <allan@archlinux.org>
-rw-r--r--src/pacman/query.c60
1 files changed, 41 insertions, 19 deletions
diff --git a/src/pacman/query.c b/src/pacman/query.c
index d1887e3a..ef279d97 100644
--- a/src/pacman/query.c
+++ b/src/pacman/query.c
@@ -97,6 +97,7 @@ static int query_fileowner(alpm_list_t *targets)
size_t rootlen;
alpm_list_t *t;
alpm_db_t *db_local;
+ alpm_list_t *packages;
/* This code is here for safety only */
if(targets == NULL) {
@@ -129,13 +130,14 @@ static int query_fileowner(alpm_list_t *targets)
}
db_local = alpm_get_localdb(config->handle);
+ packages = alpm_db_get_pkgcache(db_local);
for(t = targets; t; t = alpm_list_next(t)) {
char *filename = NULL, *dname = NULL, *rpath = NULL;
const char *bname;
struct stat buf;
alpm_list_t *i;
- size_t len;
+ size_t len, is_dir, bname_len, pbname_len;
unsigned int found = 0;
if((filename = strdup(t->data)) == NULL) {
@@ -163,15 +165,21 @@ static int query_fileowner(alpm_list_t *targets)
}
}
- if(S_ISDIR(buf.st_mode)) {
- pm_printf(ALPM_LOG_ERROR,
- _("cannot determine ownership of directory '%s'\n"), filename);
- goto targcleanup;
+ is_dir = S_ISDIR(buf.st_mode) ? 1 : 0;
+ if(is_dir) {
+ /* the entire filename is safe to resolve if we know it points to a dir,
+ * and it's necessary in case it ends in . or .. */
+ dname = realpath(filename, NULL);
+ bname = mbasename(dname);
+ rpath = mdirname(dname);
+ } else {
+ bname = mbasename(filename);
+ dname = mdirname(filename);
+ rpath = realpath(dname, NULL);
}
- bname = mbasename(filename);
- dname = mdirname(filename);
- rpath = realpath(dname, NULL);
+ bname_len = strlen(bname);
+ pbname_len = bname_len + is_dir;
if(!dname || !rpath) {
pm_printf(ALPM_LOG_ERROR, _("cannot determine real path for '%s': %s\n"),
@@ -179,33 +187,47 @@ static int query_fileowner(alpm_list_t *targets)
goto targcleanup;
}
- for(i = alpm_db_get_pkgcache(db_local); i && !found; i = alpm_list_next(i)) {
+ for(i = packages; i && (!found || is_dir); i = alpm_list_next(i)) {
alpm_pkg_t *info = i->data;
alpm_filelist_t *filelist = alpm_pkg_get_files(info);
size_t j;
for(j = 0; j < filelist->count; j++) {
const alpm_file_t *file = filelist->files + j;
- char *ppath, *pdname;
+ char *ppath;
const char *pkgfile = file->name;
+ size_t pkgfile_len = strlen(pkgfile);
+
+ /* make sure pkgfile and target are of the same type */
+ if(is_dir != (pkgfile[pkgfile_len - 1] == '/')) {
+ continue;
+ }
+
+ /* make sure pkgfile is long enough */
+ if(pkgfile_len < pbname_len) {
+ continue;
+ }
+
+ /* make sure pbname_len takes us to the start of a path component */
+ if(pbname_len != pkgfile_len && pkgfile[pkgfile_len - pbname_len - 1] != '/') {
+ continue;
+ }
- /* avoid the costly realpath usage if the basenames don't match */
- if(strcmp(mbasename(pkgfile), bname) != 0) {
+ /* compare basename with bname */
+ if(strncmp(pkgfile + pkgfile_len - pbname_len, bname, bname_len) != 0) {
continue;
}
- /* concatenate our file and the root path */
- if(rootlen + 1 + strlen(pkgfile) > PATH_MAX) {
+ /* concatenate our dirname and the root path */
+ if(rootlen + 1 + pkgfile_len - pbname_len > PATH_MAX) {
path[rootlen] = '\0'; /* reset path for error message */
pm_printf(ALPM_LOG_ERROR, _("path too long: %s%s\n"), path, pkgfile);
continue;
}
- strcpy(path + rootlen, pkgfile);
-
- pdname = mdirname(path);
- ppath = realpath(pdname, NULL);
- free(pdname);
+ strncpy(path + rootlen, pkgfile, pkgfile_len - pbname_len);
+ path[rootlen + pkgfile_len - pbname_len] = '\0';
+ ppath = realpath(path, NULL);
if(!ppath) {
pm_printf(ALPM_LOG_ERROR, _("cannot determine real path for '%s': %s\n"),
path, strerror(errno));