user: implement a basic mkdir

2 files changed, 25 insertions, 6 deletions

diff --git a/src/user/lib/include/sys/stat.h b/src/user/lib/include/sys/stat.h
index 78a8fc1..5776f1e 100644
--- a/src/user/lib/include/sys/stat.h
+++ b/src/user/lib/include/sys/stat.h
@@ -11,9 +11,4 @@ static inline int fstat(int fd, struct stat *sb) {
 	return -1;
 }
 
-static inline int mkdir(const char *path, mode_t mode) {
-	// TODO
-	(void)path; (void)mode;
-	errno = ENOSYS;
-	return -1;
-}
+int mkdir(const char *path, mode_t mode);
diff --git a/src/user/lib/sysstat.c b/src/user/lib/sysstat.c
new file mode 100644
index 0000000..df192c5
--- /dev/null
+++ b/src/user/lib/sysstat.c
@@ -0,0 +1,24 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+
+int mkdir(const char *path, mode_t mode) {
+	// TODO error when directory already exits
+	// TODO fopen-like wrapper that calls open() with a processed path
+	(void)mode;
+	size_t plen = strlen(path);
+	char *tmp = NULL;
+	/* ensure trailing slash */
+	if (plen >= 1 && path[plen - 1] != '/') {
+		tmp = malloc(plen + 2);
+		memcpy(tmp, path, plen);
+		tmp[plen] = '/';
+		tmp[plen + 1] = '\0';
+		path = tmp;
+	}
+	FILE *f = fopen(path, "a"); /* sets errno */
+	if (f) fclose(f);
+	free(tmp);
+	return f == NULL ? -1 : 0;
+}