[pacman-dev] [PATCH] Skip special files when cleaning package cache

[Allan McRae]

Ignore .sig, *.db*, and *.src.tar* when cleaning the package cache.

Fixes FS#25166.

Signed-off-by: Allan McRae <al...@archlinux.org>
---

I am bad at regex...  so I am sure some of these could be tightened up.

 src/pacman/sync.c |   22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/src/pacman/sync.c b/src/pacman/sync.c
index e69ca58..c617e0b 100644
--- a/src/pacman/sync.c
+++ b/src/pacman/sync.c
@@ -26,6 +26,7 @@
 #include <errno.h>
 #include <dirent.h>
 #include <sys/stat.h>
+#include <regex.h>
 
 #include <alpm.h>
 #include <alpm_list.h>
@@ -170,6 +171,7 @@ static int sync_cleancache(int level)
        alpm_db_t *db_local = alpm_get_localdb(config->handle);
        alpm_list_t *cachedirs = alpm_option_get_cachedirs(config->handle);
        int ret = 0;
+       regex_t sigreg, dbreg, srcpkgreg;
 
        for(i = cachedirs; i; i = alpm_list_next(i)) {
                printf(_("Cache directory: %s\n"), (const char *)i->data);
@@ -199,6 +201,10 @@ static int sync_cleancache(int level)
                printf(_("removing all files from cache...\n"));
        }
 
+       regcomp(&sigreg, "\\.sig$", REG_EXTENDED | REG_NEWLINE);
+       regcomp(&dbreg, "\\.db(\\.tar[^[:space:]]*)?$", REG_EXTENDED | 
REG_NEWLINE);
+       regcomp(&srcpkgreg, "\\.src\\.tar", REG_EXTENDED | REG_NEWLINE);
+
        for(i = cachedirs; i; i = alpm_list_next(i)) {
                const char *cachedir = i->data;
                DIR *dir = opendir(cachedir);
@@ -222,6 +228,22 @@ static int sync_cleancache(int level)
                        if(strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, 
"..") == 0) {
                                continue;
                        }
+
+                       /* skip signature files - they are removed with their 
package file */
+                       if(regexec(&sigreg, ent->d_name, 0, 0, 0) == 0) {
+                               continue;
+                       }
+
+                       /* skip package database within the cache directory */
+                       if(regexec(&dbreg, ent->d_name, 0, 0, 0) == 0) {
+                               continue;
+                       }
+
+                       /* skip source packages withing the cache directory */
+                       if(regexec(&srcpkgreg, ent->d_name, 0, 0, 0) == 0) {
+                               continue;
+                       }
+
                        /* build the full filepath */
                        snprintf(path, PATH_MAX, "%s%s", cachedir, ent->d_name);
 
-- 
1.7.9.3