/**
+ * RRDtool - src/rrd_utils.c
+ * Copyright (C) 2009 Kevin Brintnall
+ * Copyright (C) 2008 Sebastian Harl
+ *
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; only version 2 of the License is applicable.
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors:
+ * kevin brintnall <kbrint@rufus.net>
+ * Sebastian Harl <sh@tokkee.org>
**/
#include "rrd_tool.h"
-#include <stdlib.h>
#include <assert.h>
+#include <errno.h>
+#include <libgen.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
#ifdef WIN32
# define random() rand()
return random();
}
-/* rrd_add_ptr: add a pointer to a dynamically sized array of pointers,
- * realloc as necessary. returns 1 on success, 0 on failure.
+/* rrd_add_ptr_chunk: add a pointer to a dynamically sized array of
+ * pointers, realloc as necessary in multiples of "chunk".
+ *
+ * "alloc" is the number of pointers allocated
+ * "dest_size" is the number of valid pointers
+ *
+ * returns 1 on success, 0 on failure.
*/
-int rrd_add_ptr(void ***dest, size_t *dest_size, void *src)
+int rrd_add_ptr_chunk(void ***dest, size_t *dest_size, void *src,
+ size_t *alloc, size_t chunk)
{
void **temp;
assert(dest != NULL);
+ assert(alloc != NULL);
+ assert(*alloc >= *dest_size);
- temp = (void **) rrd_realloc(*dest, (*dest_size+1) * sizeof(*dest));
- if (!temp)
- return 0;
+ if (*alloc == *dest_size)
+ {
+ temp = (void **) rrd_realloc(*dest, (*alloc+chunk) * sizeof(*dest));
+ if (!temp)
+ return 0;
- *dest = temp;
- temp[*dest_size] = src;
+ *dest = temp;
+ *alloc += chunk;
+ }
+
+ (*dest)[*dest_size] = src;
(*dest_size)++;
return 1;
}
-/* like rrd_add_ptr, but calls strdup() on a string first. */
-int rrd_add_strdup(char ***dest, size_t *dest_size, char *src)
+/* rrd_add_ptr: add a pointer to a dynamically sized array of pointers,
+ * realloc as necessary. returns 1 on success, 0 on failure.
+ */
+int rrd_add_ptr(void ***dest, size_t *dest_size, void *src)
+{
+ size_t alloc = *dest_size;
+
+ return rrd_add_ptr_chunk(dest, dest_size, src, &alloc, 1);
+}
+
+/* like rrd_add_ptr_chunk, but calls strdup() on a string first. */
+int rrd_add_strdup_chunk(char ***dest, size_t *dest_size, char *src,
+ size_t *alloc, size_t chunk)
{
char *dup_src;
int add_ok;
if (!dup_src)
return 0;
- add_ok = rrd_add_ptr((void ***)dest, dest_size, (void *)dup_src);
+ add_ok = rrd_add_ptr_chunk((void ***)dest, dest_size, (void *)dup_src, alloc, chunk);
if (!add_ok)
free(dup_src);
return add_ok;
}
+int rrd_add_strdup(char ***dest, size_t *dest_size, char *src)
+{
+ size_t alloc = *dest_size;
+
+ return rrd_add_strdup_chunk(dest, dest_size, src, &alloc, 1);
+}
+
void rrd_free_ptrs(void ***src, size_t *cnt)
{
void **sp;
free (sp);
*src = NULL;
}
+
+/* recursively create the directory named by 'pathname'
+ * (similar to "mkdir -p" on the command line) */
+int rrd_mkdir_p(const char *pathname, mode_t mode)
+{
+ struct stat sb;
+
+ char *pathname_copy;
+ char *base_dir;
+
+ if ((NULL == pathname) || ('\0' == *pathname)) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (0 == stat(pathname, &sb)) {
+ if (! S_ISDIR(sb.st_mode)) {
+ errno = ENOTDIR;
+ return -1;
+ }
+ return 0;
+ }
+
+ /* keep errno as set by stat() */
+ if (ENOENT != errno)
+ return -1;
+
+ /* dirname might modify its first argument */
+ if (NULL == (pathname_copy = strdup(pathname)))
+ return -1;
+
+ base_dir = dirname(pathname_copy);
+
+ if (0 != rrd_mkdir_p(base_dir, mode)) {
+ int orig_errno = errno;
+ free(pathname_copy);
+ errno = orig_errno;
+ return -1;
+ }
+
+ free(pathname_copy);
+
+ /* keep errno as set by mkdir() */
+ if (0 != mkdir(pathname, mode))
+ return -1;
+ return 0;
+} /* rrd_mkdir_p */
+