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-rw-r--r--lib/libalpm/util.c69
1 files changed, 68 insertions, 1 deletions
diff --git a/lib/libalpm/util.c b/lib/libalpm/util.c
index 64371348..72bc9673 100644
--- a/lib/libalpm/util.c
+++ b/lib/libalpm/util.c
@@ -48,6 +48,7 @@
#include "error.h"
#include "package.h"
#include "alpm.h"
+#include "alpm_list.h"
#include "md5.h"
#ifndef HAVE_STRVERSCMP
@@ -301,7 +302,7 @@ static void _strnadd(char **str, const char *append, unsigned int count)
if(*str) {
*str = realloc(*str, strlen(*str) + count + 1);
} else {
- *str = calloc(sizeof(char), count + 1);
+ *str = calloc(count + 1, sizeof(char));
}
strncat(*str, append, count);
@@ -542,6 +543,72 @@ int _alpm_str_cmp(const void *s1, const void *s2)
return(strcmp(s1, s2));
}
+/** Find a package file in an alpm cachedir.
+ * @param filename name of package file to find
+ * @return malloced path of file, NULL if not found
+ */
+char *_alpm_filecache_find(const char* filename)
+{
+ struct stat buf;
+ char path[PATH_MAX];
+ char *retpath;
+ alpm_list_t *i;
+
+ /* Loop through the cache dirs until we find a matching file */
+ for(i = alpm_option_get_cachedirs(); i; i = alpm_list_next(i)) {
+ snprintf(path, PATH_MAX, "%s%s", (char*)alpm_list_getdata(i),
+ filename);
+ if(stat(path, &buf) == 0) {
+ /* TODO maybe check to make sure it is readable? */
+ retpath = strdup(path);
+ _alpm_log(PM_LOG_DEBUG, "found cached pkg: %s", retpath);
+ return(retpath);
+ }
+ }
+ /* package wasn't found in any cachedir */
+ return(NULL);
+}
+
+/** Check the alpm cachedirs for existance and find a writable one.
+ * If no valid cache directory can be found, use /tmp.
+ * @return pointer to a writable cache directory.
+ */
+const char *_alpm_filecache_setup(void)
+{
+ struct stat buf;
+ alpm_list_t *i, *tmp;
+ char *cachedir;
+
+ /* Loop through the cache dirs until we find a writeable dir */
+ for(i = alpm_option_get_cachedirs(); i; i = alpm_list_next(i)) {
+ cachedir = alpm_list_getdata(i);
+ if(stat(cachedir, &buf) != 0) {
+ /* cache directory does not exist.... try creating it */
+ _alpm_log(PM_LOG_WARNING, _("no %s cache exists, creating...\n"),
+ cachedir);
+ alpm_logaction("warning: no %s cache exists, creating...",
+ cachedir);
+ if(_alpm_makepath(cachedir) == 0) {
+ _alpm_log(PM_LOG_DEBUG, "using cachedir: %s", cachedir);
+ return(cachedir);
+ }
+ } else if(S_ISDIR(buf.st_mode) && (buf.st_mode & S_IWUSR)) {
+ _alpm_log(PM_LOG_DEBUG, "using cachedir: %s", cachedir);
+ return(cachedir);
+ }
+ }
+
+ /* we didn't find a valid cache directory. use /tmp. */
+ i = alpm_option_get_cachedirs();
+ tmp = alpm_list_add(NULL, strdup("/tmp/"));
+ FREELIST(i);
+ alpm_option_set_cachedirs(tmp);
+ _alpm_log(PM_LOG_DEBUG, "using cachedir: %s", "/tmp/");
+ _alpm_log(PM_LOG_WARNING, _("couldn't create package cache, using /tmp instead"));
+ alpm_logaction("warning: couldn't create package cache, using /tmp instead");
+ return(alpm_list_getdata(tmp));
+}
+
/** Get the md5 sum of file.
* @param filename name of the file
* @return the checksum on success, NULL on error