summaryrefslogtreecommitdiff
path: root/package/aufs2-util/src/br.c
diff options
context:
space:
mode:
Diffstat (limited to 'package/aufs2-util/src/br.c')
-rw-r--r--package/aufs2-util/src/br.c172
1 files changed, 0 insertions, 172 deletions
diff --git a/package/aufs2-util/src/br.c b/package/aufs2-util/src/br.c
deleted file mode 100644
index 6451c120e..000000000
--- a/package/aufs2-util/src/br.c
+++ /dev/null
@@ -1,172 +0,0 @@
-/*
- * Copyright (C) 2005-2009 Junjiro Okajima
- *
- * This program, aufs 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; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * 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
- */
-
-#define _GNU_SOURCE /* strndup */
-
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <mntent.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include <linux/aufs_type.h>
-#include "au_util.h"
-
-static int by_opts(char ***br, int *nbr, char *bropt)
-{
- char *p, **a;
- int l;
-
- /* bropts is placed at the end of mnt_opts */
- errno = EINVAL;
- //puts(bropt);
- if (strchr(bropt, ','))
- AuFin("%s", bropt);
-
- l = strlen(bropt);
- p = malloc(l + 2);
- if (!p)
- AuFin("malloc");
- memcpy(p, bropt, l + 1);
- bropt = p;
- bropt[l + 1] = 0; /* end marker */
-
- *nbr = 1;
- while (1) {
- p = strchr(p + 1, ':');
- if (!p)
- break;
- *p = 0;
- (*nbr)++;
- }
-
- a = malloc(sizeof(a) * (*nbr + 1));
- if (!a)
- AuFin("malloc");
-
- *br = a;
- *a++ = bropt;
- p = bropt;
- while (*p) {
- p += strlen(p) + 1;
- *a++ = p;
- }
- *--a = NULL;
- /* don't free bropt */
-
- return 0;
-}
-
-#ifdef DEBUG
-#define SiPathPrefix "/tmp/aufs/si_"
-#define BufSiz 4
-#else
-#define SiPathPrefix "/sys/fs/aufs/si_"
-#define BufSiz BUFSIZ
-#endif
-
-static int by_sysfs(char ***br, int *nbr, char *siopt)
-{
- int err, i, l, sz;
- char buf[BufSiz], path[] = SiPathPrefix "1234567890123456/br32767";
- char *p, *end, **a, *q;
- FILE *fp;
-
- errno = EINVAL;
- end = strchr(siopt, ',');
- if (end)
- i = end - siopt;
- else
- i = strlen(siopt);
-
- strncpy(path + sizeof(SiPathPrefix) - 1, siopt, i);
- p = path + sizeof(SiPathPrefix) - 1 + i;
- strcpy(p, "/br");
- p += 3; /* "/br" */
- *nbr = 0;
- err = 0;
- while (!err) {
- sprintf(p, "%d", (*nbr)++);
- err = access(path, F_OK);
- }
-
- a = malloc(sizeof(*br) * *nbr);
- if (!a)
- AuFin("malloc");
-
- (*nbr)--;
- *br = a;
- for (i = 0; i < *nbr; i++) {
- sprintf(p, "%d", i);
- fp = fopen(path, "r");
- if (!fp)
- AuFin("%s", path);
- if (fgets(buf, sizeof(buf), fp) != buf)
- AuFin("%s", path);
- l = strlen(buf);
- if (l < 1)
- AuFin("internal error, %d", l);
-
- q = strndup(buf, l - 1);
- if (buf[l - 1] != '\n') {
- /* a branch path with crazy length */
- /* stat(2) for sysfs is meaningless */
- sz = sizeof(buf);
- do {
- free(q);
- sz <<= 1;
- q = malloc(sz);
- if (!q)
- AuFin("malloc");
- rewind(fp);
- if (fgets(q, sz, fp) != q)
- AuFin("%s", path);
- l = strlen(q);
- } while (q[l - 1] != '\n');
- q[l - 1] = 0;
- }
-
- *a++ = q;
- /* don't free q */
- fclose(fp); /* ignore */
- }
- *a = NULL;
-
- return 0;
-}
-
-#define BrOpt ",br:"
-#define SiOpt "si"
-int au_br(char ***br, int *nbr, struct mntent *ent)
-{
- char *p;
-
- *nbr = 0;
- p = strstr(ent->mnt_opts, BrOpt);
- if (p)
- return by_opts(br, nbr, p + sizeof(BrOpt) - 1);
- p = hasmntopt(ent, SiOpt);
- if (p)
- return by_sysfs(br, nbr, p + sizeof(SiOpt));
-
- /* broken opts */
- AuFin("internal error, %s", ent->mnt_opts);
- return -1; /* never reach here */
-}