Move the mtab support stuff into libbb

 -Erik

2 files changed, 147 insertions, 0 deletions

diff --git a/libbb/mtab.c b/libbb/mtab.c
new file mode 100644
index 000000000..28c9978ef
--- /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 000000000..d9c3de3c3
--- /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:
+*/