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authorEric Andersen2001-04-01 16:01:11 +0000
committerEric Andersen2001-04-01 16:01:11 +0000
commitc4cef5ab063d7abb604d48610424566202dcade0 (patch)
treec661196acbb1adfa81257a7f23b08bd15d653be8 /libbb
parentf77d88641d934fbd9ed0da8c8e31c84dc5856532 (diff)
downloadbusybox-c4cef5ab063d7abb604d48610424566202dcade0.zip
busybox-c4cef5ab063d7abb604d48610424566202dcade0.tar.gz
Move the mtab support stuff into libbb
-Erik
Diffstat (limited to 'libbb')
-rw-r--r--libbb/mtab.c95
-rw-r--r--libbb/mtab_file.c52
2 files changed, 147 insertions, 0 deletions
diff --git a/libbb/mtab.c b/libbb/mtab.c
new file mode 100644
index 0000000..28c9978
--- /dev/null
+++ b/libbb/mtab.c
@@ -0,0 +1,95 @@
+/* vi: set sw=4 ts=4: */
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <mntent.h>
+#include "libbb.h"
+
+extern const char mtab_file[]; /* Defined in utility.c */
+static const int MS_RDONLY = 1; /* Mount read-only. */
+
+void erase_mtab(const char *name)
+{
+ struct mntent entries[20];
+ int count = 0;
+ FILE *mountTable = setmntent(mtab_file, "r");
+ struct mntent *m;
+
+ /* Check if reading the mtab file failed */
+ if (mountTable == 0
+ /* Bummer. fall back on trying the /proc filesystem */
+ && (mountTable = setmntent("/proc/mounts", "r")) == 0) {
+ perror_msg("%s", mtab_file);
+ return;
+ }
+
+ while ((m = getmntent(mountTable)) != 0) {
+ entries[count].mnt_fsname = strdup(m->mnt_fsname);
+ entries[count].mnt_dir = strdup(m->mnt_dir);
+ entries[count].mnt_type = strdup(m->mnt_type);
+ entries[count].mnt_opts = strdup(m->mnt_opts);
+ entries[count].mnt_freq = m->mnt_freq;
+ entries[count].mnt_passno = m->mnt_passno;
+ count++;
+ }
+ endmntent(mountTable);
+ if ((mountTable = setmntent(mtab_file, "w"))) {
+ int i;
+
+ for (i = 0; i < count; i++) {
+ int result = (strcmp(entries[i].mnt_fsname, name) == 0
+ || strcmp(entries[i].mnt_dir, name) == 0);
+
+ if (result)
+ continue;
+ else
+ addmntent(mountTable, &entries[i]);
+ }
+ endmntent(mountTable);
+ } else if (errno != EROFS)
+ perror_msg("%s", mtab_file);
+}
+
+void write_mtab(char *blockDevice, char *directory,
+ char *filesystemType, long flags, char *string_flags)
+{
+ FILE *mountTable = setmntent(mtab_file, "a+");
+ struct mntent m;
+
+ if (mountTable == 0) {
+ perror_msg("%s", mtab_file);
+ return;
+ }
+ if (mountTable) {
+ int length = strlen(directory);
+
+ if (length > 1 && directory[length - 1] == '/')
+ directory[length - 1] = '\0';
+
+ if (filesystemType == 0) {
+ struct mntent *p = find_mount_point(blockDevice, "/proc/mounts");
+
+ if (p && p->mnt_type)
+ filesystemType = p->mnt_type;
+ }
+ m.mnt_fsname = blockDevice;
+ m.mnt_dir = directory;
+ m.mnt_type = filesystemType ? filesystemType : "default";
+
+ if (*string_flags) {
+ m.mnt_opts = string_flags;
+ } else {
+ if ((flags | MS_RDONLY) == flags)
+ m.mnt_opts = "ro";
+ else
+ m.mnt_opts = "rw";
+ }
+
+ m.mnt_freq = 0;
+ m.mnt_passno = 0;
+ addmntent(mountTable, &m);
+ endmntent(mountTable);
+ }
+}
diff --git a/libbb/mtab_file.c b/libbb/mtab_file.c
new file mode 100644
index 0000000..d9c3de3
--- /dev/null
+++ b/libbb/mtab_file.c
@@ -0,0 +1,52 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Copyright (C) tons of folks. Tracking down who wrote what
+ * isn't something I'm going to worry about... If you wrote something
+ * here, please feel free to acknowledge your work.
+ *
+ * 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; 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Based in part on code from sash, Copyright (c) 1999 by David I. Bell
+ * Permission has been granted to redistribute this code under the GPL.
+ *
+ */
+
+#include <stdio.h>
+#include "libbb.h"
+
+
+/* Busybox mount uses either /proc/mounts or /dev/mtab to
+ * get the list of currently mounted filesystems */
+#if defined BB_MTAB
+const char mtab_file[] = "/etc/mtab";
+#else
+# if defined BB_FEATURE_USE_DEVPS_PATCH
+ const char mtab_file[] = "/dev/mtab";
+# else
+ const char mtab_file[] = "/proc/mounts";
+# endif
+#endif
+
+
+/* END CODE */
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/