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Restructure to avoid duplication in 64-bit version.
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68b7392e2c
commit
6016e6f6f5
@ -35,6 +35,138 @@
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# define STATFS statfs
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# define STATVFS statvfs
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# define INTERNAL_STATVFS __internal_statvfs
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int
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__statvfs_getflags (const char *name, int fstype, struct stat64 *st)
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{
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if (st == NULL)
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return 0;
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const char *fsname = NULL;
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const char *fsname2 = NULL;
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/* Map the filesystem type we got from the statfs call to a string. */
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switch (fstype)
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{
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case EXT2_SUPER_MAGIC:
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fsname = "ext3";
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fsname2 = "ext2";
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break;
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case DEVPTS_SUPER_MAGIC:
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fsname= "devpts";
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break;
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case SHMFS_SUPER_MAGIC:
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fsname = "tmpfs";
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break;
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case PROC_SUPER_MAGIC:
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fsname = "proc";
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break;
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case USBDEVFS_SUPER_MAGIC:
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fsname = "usbdevfs";
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break;
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case AUTOFS_SUPER_MAGIC:
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fsname = "autofs";
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break;
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case NFS_SUPER_MAGIC:
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fsname = "nfs";
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break;
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}
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FILE *mtab = __setmntent ("/proc/mounts", "r");
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if (mtab == NULL)
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mtab = __setmntent (_PATH_MOUNTED, "r");
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int result = 0;
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if (mtab != NULL)
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{
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bool success = false;
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struct mntent mntbuf;
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char tmpbuf[1024];
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/* No locking needed. */
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(void) __fsetlocking (mtab, FSETLOCKING_BYCALLER);
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again:
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while (__getmntent_r (mtab, &mntbuf, tmpbuf, sizeof (tmpbuf)))
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{
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/* In a first round we look for a given mount point, if
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we have a name. */
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if (name != NULL && strcmp (name, mntbuf.mnt_dir) != 0)
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continue;
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/* We need to look at the entry only if the filesystem
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name matches. If we have a filesystem name. */
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else if (fsname != NULL
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&& strcmp (fsname, mntbuf.mnt_type) != 0
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&& (fsname2 == NULL
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|| strcmp (fsname2, mntbuf.mnt_type) != 0))
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continue;
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/* Find out about the device the current entry is for. */
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struct stat64 fsst;
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if (stat64 (mntbuf.mnt_dir, &fsst) >= 0
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&& st->st_dev == fsst.st_dev)
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{
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/* Bingo, we found the entry for the device FD is on.
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Now interpret the option string. */
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char *cp = mntbuf.mnt_opts;
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char *opt;
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while ((opt = strsep (&cp, ",")) != NULL)
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if (strcmp (opt, "ro") == 0)
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result |= ST_RDONLY;
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else if (strcmp (opt, "nosuid") == 0)
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result |= ST_NOSUID;
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else if (strcmp (opt, "noexec") == 0)
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result |= ST_NOEXEC;
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else if (strcmp (opt, "nodev") == 0)
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result |= ST_NODEV;
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else if (strcmp (opt, "sync") == 0)
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result |= ST_SYNCHRONOUS;
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else if (strcmp (opt, "mand") == 0)
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result |= ST_MANDLOCK;
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else if (strcmp (opt, "noatime") == 0)
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result |= ST_NOATIME;
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else if (strcmp (opt, "nodiratime") == 0)
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result |= ST_NODIRATIME;
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/* We can stop looking for more entries. */
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success = true;
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break;
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}
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}
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/* Maybe the kernel names for the filesystems changed or the
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statvfs call got a name which was not the mount point. Check
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again, this time without checking for name matches first. */
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if (! success && (name != NULL || fsname != NULL))
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{
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if (name != NULL)
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/* Try without a mount point name. */
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name = NULL;
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else
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{
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/* Try without a filesystem name. */
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assert (fsname != NULL);
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fsname = fsname2 = NULL;
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}
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/* It is not strictly allowed to use rewind here. But
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this code is part of the implementation so it is
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acceptable. */
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rewind (mtab);
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goto again;
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}
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/* Close the file. */
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__endmntent (mtab);
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}
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return result;
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}
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#else
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extern int __statvfs_getflags (const char *name, int fstype,
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struct stat64 *st);
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#endif
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@ -65,7 +197,7 @@ INTERNAL_STATVFS (const char *name, struct STATVFS *buf,
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buf->__f_unused = 0;
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#endif
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buf->f_namemax = fsbuf->f_namelen;
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memset (buf->__f_spare, '\0', 6 * sizeof (int));
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memset (buf->__f_spare, '\0', sizeof (buf->__f_spare));
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/* What remains to do is to fill the fields f_favail and f_flag. */
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@ -76,128 +208,5 @@ INTERNAL_STATVFS (const char *name, struct STATVFS *buf,
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the /etc/mtab file and search for the entry which matches the given
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file. The way we can test for matching filesystem is using the
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device number. */
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buf->f_flag = 0;
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if (st != NULL)
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{
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struct mntent mntbuf;
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FILE *mtab;
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const char *fsname = NULL;
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const char *fsname2 = NULL;
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bool success = false;
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/* Map the filesystem type we got from the statfs call to a string. */
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switch (fsbuf->f_type)
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{
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case EXT2_SUPER_MAGIC:
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fsname = "ext3";
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fsname2 = "ext2";
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break;
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case DEVPTS_SUPER_MAGIC:
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fsname= "devpts";
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break;
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case SHMFS_SUPER_MAGIC:
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fsname = "tmpfs";
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break;
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case PROC_SUPER_MAGIC:
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fsname = "proc";
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break;
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case USBDEVFS_SUPER_MAGIC:
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fsname = "usbdevfs";
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break;
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case AUTOFS_SUPER_MAGIC:
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fsname = "autofs";
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break;
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case NFS_SUPER_MAGIC:
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fsname = "nfs";
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break;
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}
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mtab = __setmntent ("/proc/mounts", "r");
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if (mtab == NULL)
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mtab = __setmntent (_PATH_MOUNTED, "r");
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if (mtab != NULL)
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{
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char tmpbuf[1024];
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/* No locking needed. */
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(void) __fsetlocking (mtab, FSETLOCKING_BYCALLER);
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again:
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while (__getmntent_r (mtab, &mntbuf, tmpbuf, sizeof (tmpbuf)))
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{
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/* In a first round we look for a given mount point, if
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we have a name. */
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if (name != NULL && strcmp (name, mntbuf.mnt_dir) != 0)
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continue;
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/* We need to look at the entry only if the filesystem
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name matches. If we have a filesystem name. */
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else if (fsname != NULL
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&& strcmp (fsname, mntbuf.mnt_type) != 0
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&& (fsname2 == NULL
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|| strcmp (fsname2, mntbuf.mnt_type) != 0))
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continue;
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/* Find out about the device the current entry is for. */
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struct stat64 fsst;
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if (stat64 (mntbuf.mnt_dir, &fsst) >= 0
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&& st->st_dev == fsst.st_dev)
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{
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/* Bingo, we found the entry for the device FD is on.
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Now interpret the option string. */
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char *cp = mntbuf.mnt_opts;
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char *opt;
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while ((opt = strsep (&cp, ",")) != NULL)
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if (strcmp (opt, "ro") == 0)
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buf->f_flag |= ST_RDONLY;
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else if (strcmp (opt, "nosuid") == 0)
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buf->f_flag |= ST_NOSUID;
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else if (strcmp (opt, "noexec") == 0)
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buf->f_flag |= ST_NOEXEC;
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else if (strcmp (opt, "nodev") == 0)
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buf->f_flag |= ST_NODEV;
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else if (strcmp (opt, "sync") == 0)
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buf->f_flag |= ST_SYNCHRONOUS;
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else if (strcmp (opt, "mand") == 0)
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buf->f_flag |= ST_MANDLOCK;
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else if (strcmp (opt, "noatime") == 0)
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buf->f_flag |= ST_NOATIME;
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else if (strcmp (opt, "nodiratime") == 0)
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buf->f_flag |= ST_NODIRATIME;
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/* We can stop looking for more entries. */
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success = true;
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break;
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}
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}
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/* Maybe the kernel names for the filesystems changed or the
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statvfs call got a name which was not the mount point.
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Check again, this time without checking for name matches
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first. */
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if (! success && (name != NULL || fsname != NULL))
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{
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if (name != NULL)
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/* Try without a mount point name. */
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name = NULL;
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else
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{
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/* Try without a filesystem name. */
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assert (fsname != NULL);
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fsname = fsname2 = NULL;
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}
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/* It is not strictly allowed to use rewind here. But
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this code is part of the implementation so it is
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acceptable. */
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rewind (mtab);
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goto again;
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}
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/* Close the file. */
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__endmntent (mtab);
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}
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}
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buf->f_flag = __statvfs_getflags (name, fsbuf->f_type, st);
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}
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