/* vi: set sw=4 ts=4: */ /* * Utility routines. * * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> * * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ #include "libbb.h" #include <mntent.h> /* * Given a block device, find the mount table entry if that block device * is mounted. * * Given any other file (or directory), find the mount table entry for its * filesystem. */ struct mntent* FAST_FUNC find_mount_point(const char *name, const char *table) { struct stat s; dev_t mountDevice; FILE *mountTable; struct mntent *mountEntry; if (stat(name, &s) != 0) return 0; if ((s.st_mode & S_IFMT) == S_IFBLK) mountDevice = s.st_rdev; else mountDevice = s.st_dev; mountTable = setmntent(table ? table : bb_path_mtab_file, "r"); if (!mountTable) return 0; while ((mountEntry = getmntent(mountTable)) != 0) { if (strcmp(name, mountEntry->mnt_dir) == 0 || strcmp(name, mountEntry->mnt_fsname) == 0 ) { /* String match. */ break; } if (stat(mountEntry->mnt_fsname, &s) == 0 && s.st_rdev == mountDevice) /* Match the device. */ break; if (stat(mountEntry->mnt_dir, &s) == 0 && s.st_dev == mountDevice) /* Match the directory's mount point. */ break; } endmntent(mountTable); return mountEntry; }