misc: Add `is_dir()`, and `mkdirp()`

`is_dir()` checks if the supplied path is a directory, and returns 1 if
it's a directory, 0 if it isn't a directory, and -1 if it doesn't exist.

`mkdirp()` works like `mkdir()` except that it also creates parent
directories if needed.

1 files changed, 36 insertions, 0 deletions

diff --git a/misc.c b/misc.c
index 97333eb..4c0cab0 100644
--- a/misc.c
+++ b/misc.c
@@ -1,8 +1,11 @@
 #include <ctype.h>
+#include <dirent.h>
 #include <string.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <sys/stat.h>
+#include <unistd.h>
 #include "misc.h"
 
 char *read_file(const char *filename, long *size) {
@@ -206,3 +209,36 @@ int format_len(const char *fmt, ...) {
 	va_end(args);
 	return len;
 }
+
+int is_dir(const char *path) {
+	DIR *dir;
+
+	if (!access(path, F_OK)) {
+		if ((dir = opendir(path)) != NULL) {
+			closedir(dir);
+			return 1;
+		} else {
+			return 0;
+		}
+	} else {
+		return -1;
+	}
+}
+
+void mkdirp(const char *path, int mode) {
+	char *str = make_str(path);
+
+	for (char *p = find_delm(str, "/", *str == '/'); !is_empty(p); p = find_delm(p, "/", 1)) {
+		if (*p == '/') {
+			*p = '\0';
+		}
+		if (is_dir(str) < 0 && mkdir(str, mode) < 0) {
+			break;
+		}
+		if (*p == '\0') {
+			*p = '/';
+		}
+	}
+
+	free(str);
+}