nixpkgs/pkgs/development/libraries/libical/respect-env-tzdir.patch

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* Remove /usr/*/zoneinfo from the default search path
* Respect $TZDIR
diff --git a/src/libical/icaltz-util.c b/src/libical/icaltz-util.c
index adf7598..d2fd5c8 100644
--- a/src/libical/icaltz-util.c
+++ b/src/libical/icaltz-util.c
@@ -108,7 +108,7 @@ typedef struct
static int r_pos [] = {1, 2, 3, -2, -1};
-static char *search_paths [] = {"/usr/share/zoneinfo","/usr/lib/zoneinfo","/etc/zoneinfo","/usr/share/lib/zoneinfo"};
+static char *search_paths [] = {"/etc/zoneinfo"};
static char *zdir = NULL;
#define NUM_SEARCH_PATHS (sizeof (search_paths)/ sizeof (search_paths [0]))
@@ -195,6 +195,16 @@ set_zonedir (void)
const char *fname = ZONES_TAB_SYSTEM_FILENAME;
int i;
+ const char *env_tzdir = strdup (getenv ("TZDIR"));
+ if (env_tzdir) {
+ sprintf (file_path, "%s/%s", env_tzdir, fname);
+ if (!access (file_path, F_OK|R_OK)) {
+ zdir = env_tzdir;
+ return;
+ }
+ free (env_tzdir);
+ }
+
for (i = 0;i < NUM_SEARCH_PATHS; i++) {
sprintf (file_path, "%s/%s", search_paths [i], fname);
if (!access (file_path, F_OK|R_OK)) {