| #include "internal.h" |
| #include <stdio.h> |
| #include <mntent.h> |
| #include <sys/stat.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. |
| */ |
| extern struct mntent * |
| findMountPoint(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; |
| |
| |
| if ( (mountTable = setmntent(table, "r")) == 0 ) |
| 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; |
| } |