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authorJune McEnroe <june@causal.agency>2021-01-26 15:39:13 -0500
committerJune McEnroe <june@causal.agency>2021-04-03 18:06:10 -0400
commit299763d948cd31522b357f011a8c148b0cf2fe83 (patch)
treeaba591ce7e80afc9497bfad5b01312ff1b4d3ac2
parentSkip STATUSMSG prefixes (diff)
downloadlitterbox-299763d948cd31522b357f011a8c148b0cf2fe83.tar.gz
litterbox-299763d948cd31522b357f011a8c148b0cf2fe83.zip
Tighten up XDG base directory path handling
Don't search base directories if path starts with "/", "./" or
"../", but still do if the path simply starts with ".". Bail early
if HOME is needed but unset. Don't attempt to open the original
path in configOpen and dataOpen.
Diffstat (limited to '')
-rw-r--r--xdg.c38
1 files changed, 13 insertions, 25 deletions
diff --git a/xdg.c b/xdg.c
index 00cd021..c22bc0a 100644
--- a/xdg.c
+++ b/xdg.c
@@ -32,6 +32,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
+#include <sysexits.h>
 
 #include "database.h"
 
@@ -71,7 +72,7 @@ basePath(struct Base base, const char **dirs, const char *path) {
 		return buf;
 	}
 
-	if (path[0] == '/' || path[0] == '.') {
+	if (path[strspn(path, ".")] == '/') {
 		*dirs = "";
 		return path;
 	}
@@ -89,7 +90,7 @@ basePath(struct Base base, const char **dirs, const char *path) {
 			home, base.defHome, path
 		);
 	} else {
-		return NULL;
+		errx(EX_CONFIG, "HOME unset");
 	}
 	return buf;
 }
@@ -98,8 +99,7 @@ const char *configPath(const char **dirs, const char *path) {
 	return basePath(Config, dirs, path);
 }
 
-const char *
-dataPath(const char **dirs, const char *path) {
+const char *dataPath(const char **dirs, const char *path) {
 	return basePath(Data, dirs, path);
 }
 
@@ -110,17 +110,16 @@ FILE *configOpen(const char *path, const char *mode) {
 		if (file) return file;
 		if (errno != ENOENT) warn("%s", abs);
 	}
-	FILE *file = fopen(path, mode);
-	if (!file) warn("%s", path);
-	return file;
+	dirs = NULL;
+	warn("%s", configPath(&dirs, path));
+	return NULL;
 }
 
 void dataMkdir(const char *path) {
 	const char *dirs = NULL;
-	const char *abs = dataPath(&dirs, path);
-	if (!abs) return;
-	int error = mkdir(abs, S_IRWXU);
-	if (error && errno != EEXIST) warn("%s", abs);
+	path = dataPath(&dirs, path);
+	int error = mkdir(path, S_IRWXU);
+	if (error && errno != EEXIST) warn("%s", path);
 }
 
 FILE *dataOpen(const char *path, const char *mode) {
@@ -130,20 +129,9 @@ FILE *dataOpen(const char *path, const char *mode) {
 		if (file) return file;
 		if (errno != ENOENT) warn("%s", abs);
 	}
-
-	if (mode[0] != 'r') {
-		dataMkdir("");
-		dirs = NULL;
-		path = dataPath(&dirs, path);
-		if (!path) {
-			warn("HOME unset");
-			return NULL;
-		}
-		FILE *file = fopen(path, mode);
-		if (!file) warn("%s", path);
-		return file;
-	}
-
+	if (mode[0] != 'r') dataMkdir("");
+	dirs = NULL;
+	path = dataPath(&dirs, path);
 	FILE *file = fopen(path, mode);
 	if (!file) warn("%s", path);
 	return file;