1 files changed, 68 insertions, 0 deletions
diff --git a/pppd_plugin/src/dirutil.c b/pppd_plugin/src/dirutil.c
new file mode 100644
index 00000000..e7b1a773
--- /dev/null
+++ b/pppd_plugin/src/dirutil.c
@@ -0,0 +1,68 @@
+/* dirutil.c ... directory utilities.
+ *               C. Scott Ananian <cananian@alumni.princeton.edu>
+ *
+ * $Id: dirutil.c,v 1.2 2003/06/17 17:25:47 reink Exp $
+ */
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include "dirutil.h"
+
+/* Returned malloc'ed string representing basename */
+char *basenamex(char *pathname)
+{
+    char *dup = strdup(pathname);
+    char *ptr = strrchr(stripslash(dup), '/');
+    if (ptr == NULL) return dup;
+    ptr = strdup(ptr+1);
+    free(dup);
+    return ptr;
+}
+
+/* Return malloc'ed string representing directory name (no trailing slash) */
+char *dirnamex(char *pathname)
+{
+    char *dup = strdup(pathname);
+    char *ptr = strrchr(stripslash(dup), '/');
+    if (ptr == NULL) { free(dup); return strdup("."); }
+    if (ptr == dup && dup[0] == '/') ptr++;
+    *ptr = '\0';
+    return dup;
+}
+
+/* In-place modify a string to remove trailing slashes.  Returns arg.
+ * stripslash("/") returns "/";
+ */
+char *stripslash(char *pathname) {
+    int len = strlen(pathname);
+    while (len > 1 && pathname[len - 1] == '/')
+        pathname[--len] = '\0';
+    return pathname;
+}
+
+/* ensure dirname exists, creating it if necessary. */
+int make_valid_path(char *dir, mode_t mode)
+{
+    struct stat st;
+    char *tmp = NULL, *path = stripslash(strdup(dir));
+    int retval;
+    if (stat(path, &st) == 0) { /* file exists */
+        if (S_ISDIR(st.st_mode)) { retval = 1; goto end; }
+        else { retval = 0; goto end; } /* not a directory.  Oops. */
+    }
+    /* Directory doesn't exist.  Let's make it. */
+    /*   Make parent first. */
+    if (!make_valid_path(tmp = dirnamex(path), mode)) { retval = 0; goto end; }
+    /*   Now make this 'un. */
+    if (mkdir(path, mode) < 0) { retval = 0; goto end; }
+    /* Success. */
+    retval = 1;
+
+end:
+    if (tmp != NULL) free(tmp);
+    if (path != NULL) free(path);
+    return retval;
+}