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Diffstat (limited to 'package/aufs2-util/src/plink.c')
-rw-r--r--package/aufs2-util/src/plink.c356
1 files changed, 0 insertions, 356 deletions
diff --git a/package/aufs2-util/src/plink.c b/package/aufs2-util/src/plink.c
deleted file mode 100644
index 6ff16c76a..000000000
--- a/package/aufs2-util/src/plink.c
+++ /dev/null
@@ -1,356 +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 _FILE_OFFSET_BITS 64 /* ftw.h */
-#define _XOPEN_SOURCE 500 /* ftw.h */
-#define _GNU_SOURCE /* ftw.h */
-
-#include <sys/ioctl.h>
-#include <sys/resource.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <dirent.h>
-#include <ftw.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"
-
-/* todo: try argz? */
-static struct name_array {
- char *o;
- int bytes;
-
- char *cur;
- int nname;
-} na;
-
-static struct ino_array {
- char *o;
- int bytes;
-
- union {
- char *p;
- ino_t *cur;
- };
- int nino;
-} ia;
-
-static int na_append(char *plink_dir, char *name)
-{
- int l, sz;
- char *p;
- const int cur = na.cur - na.o;
-
- l = strlen(plink_dir) + strlen(name) + 2;
- sz = na.bytes + l;
- p = realloc(na.o, sz);
- if (!p)
- AuFin("realloc");
-
- na.o = p;
- na.bytes = sz;
- na.cur = p + cur;
- na.cur += sprintf(na.cur, "%s/%s", plink_dir, name) + 1;
- na.nname++;
-
- return 0;
-}
-
-static int ia_append(ino_t ino)
-{
- int sz;
- char *p;
- const int cur = ia.p - ia.o;
-
- sz = na.bytes + sizeof(ino_t);
- p = realloc(ia.o, sz);
- if (!p)
- AuFin("realloc");
-
- ia.o = p;
- ia.bytes = sz;
- ia.p = p + cur;
- *ia.cur++ = ino;
- ia.nino++;
-
- return 0;
-}
-
-static int build_array(char *plink_dir)
-{
- int err;
- DIR *dp;
- struct dirent *de;
- char *p;
- ino_t ino;
-
- err = access(plink_dir, F_OK);
- if (err)
- return 0;
-
- err = 0;
- dp = opendir(plink_dir);
- if (!dp)
- AuFin("%s", plink_dir);
- while ((de = readdir(dp))) {
- if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, ".."))
- continue;
-#if 0
- if (de->d_type == DT_DIR) {
- errno = EISDIR;
- AuFin(de->d_name);
- }
-#endif
-
- err = na_append(plink_dir, de->d_name);
- if (err)
- break;
-
- p = strchr(de->d_name, '.');
- if (!p) {
- errno = EINVAL;
- AuFin("internal error, %s", de->d_name);
- }
- *p = 0;
- errno = 0;
- ino = strtoull(de->d_name, NULL, 0);
- if (ino == /*ULLONG_MAX*/-1 && errno == ERANGE)
- AuFin("internal error, %s", de->d_name);
- err = ia_append(ino);
- if (err)
- break;
- }
- closedir(dp);
-
- return err;
-}
-
-static int ia_test(ino_t ino)
-{
- int i;
- ino_t *p;
-
- /* todo: hash table */
- ia.p = ia.o;
- p = ia.cur;
- for (i = 0; i < ia.nino; i++)
- if (*p++ == ino)
- return 1;
- return 0;
-}
-
-/* ---------------------------------------------------------------------- */
-
-static int ftw_list(const char *fname, const struct stat *st, int flags,
- struct FTW *ftw)
-{
- if (!strcmp(fname + ftw->base, AUFS_WH_PLINKDIR))
- return FTW_SKIP_SUBTREE;
- if (flags == FTW_D || flags == FTW_DNR)
- return FTW_CONTINUE;
-
- if (ia_test(st->st_ino))
- puts(fname);
-
- return FTW_CONTINUE;
-}
-
-static int ftw_cpup(const char *fname, const struct stat *st, int flags,
- struct FTW *ftw)
-{
- int err;
-
- if (!strcmp(fname + ftw->base, AUFS_WH_PLINKDIR))
- return FTW_SKIP_SUBTREE;
- if (flags == FTW_D || flags == FTW_DNR)
- return FTW_CONTINUE;
-
- /*
- * do nothing but update something harmless in order to make it copyup
- */
- if (ia_test(st->st_ino)) {
- Dpri("%s\n", fname);
- if (!S_ISLNK(st->st_mode))
- err = chown(fname, -1, -1);
- else
- err = lchown(fname, -1, -1);
- if (err)
- AuFin("%s", fname);
- }
-
- return FTW_CONTINUE;
-}
-
-/* ---------------------------------------------------------------------- */
-
-static DIR *dp;
-void au_plink_maint(char *path)
-{
- int err;
-
- if (path) {
- if (dp) {
- errno = EINVAL;
- AuFin("dp is not NULL");
- }
- dp = opendir(path);
- if (!dp)
- AuFin("%s", path);
-
- err = ioctl(dirfd(dp), AUFS_CTL_PLINK_MAINT);
-#ifndef DEBUG
- if (err)
- AuFin("AUFS_CTL_PLINK_MAINT");
-#endif
- } else {
- err = closedir(dp);
- if (err)
- AuFin("closedir");
- dp = NULL;
- }
-}
-
-void au_clean_plink(void)
-{
- int err;
-
- err = ioctl(dirfd(dp), AUFS_CTL_PLINK_CLEAN);
-#ifndef DEBUG
- if (err)
- AuFin("AUFS_CTL_PLINK_CLEAN");
-#endif
-}
-
-static int do_plink(char *cwd, int cmd, int nbr, char *br[])
-{
- int err, i, l;
- struct rlimit rlim;
- __nftw_func_t func;
- char *p;
-
- err = 0;
- switch (cmd) {
- case AuPlink_FLUSH:
- /*FALLTHROUGH*/
- case AuPlink_CPUP:
- func = ftw_cpup;
- break;
- case AuPlink_LIST:
- func = ftw_list;
- break;
- default:
- errno = EINVAL;
- AuFin(NULL);
- func = NULL; /* never reach here */
- }
-
- for (i = 0; i < nbr; i++) {
- //puts(br[i]);
- p = strchr(br[i], '=');
- if (strcmp(p + 1, AUFS_BRPERM_RW)
- && strcmp(p + 1, AUFS_BRPERM_RWNLWH))
- continue;
-
- *p = 0;
- l = strlen(br[i]);
- p = malloc(l + sizeof(AUFS_WH_PLINKDIR) + 2);
- if (!p)
- AuFin("malloc");
- sprintf(p, "%s/%s", br[i], AUFS_WH_PLINKDIR);
- //puts(p);
- err = build_array(p);
- if (err)
- AuFin("build_array");
- free(p);
- }
- if (!ia.nino)
- goto out;
-
- if (cmd == AuPlink_LIST) {
- ia.p = ia.o;
- for (i = 0; i < ia.nino; i++)
- printf("%llu ", (unsigned long long)*ia.cur++);
- putchar('\n');
- }
-
- err = getrlimit(RLIMIT_NOFILE, &rlim);
- if (err)
- AuFin("getrlimit");
- nftw(cwd, func, rlim.rlim_cur - 10,
- FTW_PHYS | FTW_MOUNT | FTW_ACTIONRETVAL);
- /* ignore */
-
- if (cmd == AuPlink_FLUSH) {
- au_clean_plink();
-
- na.cur = na.o;
- for (i = 0; i < na.nname; i++) {
- Dpri("%s\n", na.cur);
- err = unlink(na.cur);
- if (err)
- AuFin("%s", na.cur);
- na.cur += strlen(na.cur) + 1;
- }
- }
-
- out:
- free(ia.o);
- free(na.o);
- return err;
-}
-
-int au_plink(char cwd[], int cmd, int begin_maint, int end_maint)
-{
- int err, nbr;
- struct mntent ent;
- char **br;
-
- if (begin_maint)
- au_plink_maint(cwd);
-
- err = au_proc_getmntent(cwd, &ent);
- if (err)
- AuFin("no such mount point");
-
- if (hasmntopt(&ent, "noplink"))
- goto out; /* success */
-
-#ifdef DEBUG
- //char a[] = "a,b,br:/tmp/br0=rw:/br1=ro";
- char a[] = "a,b,si=1,c";
- ent.mnt_opts = a;
-#endif
- err = au_br(&br, &nbr, &ent);
- //printf("nbr %d\n", nbr);
- if (err)
- AuFin(NULL);
-
- err = do_plink(cwd, cmd, nbr, br);
- if (err)
- AuFin(NULL);
-
- out:
- if (end_maint)
- au_plink_maint(NULL);
- return err;
-}