/* mountpoint.c - Check if a directory is a mountpoint. * * Copyright 2012 Elie De Brauwer <eliedebrauwer@gmail.com> USE_MOUNTPOINT(NEWTOY(mountpoint, "<1qdx", TOYFLAG_BIN)) config MOUNTPOINT bool "mountpoint" default y help usage: mountpoint [-q] [-d] directory mountpoint [-q] [-x] device -q Be quiet, return zero if directory is a mountpoint -d Print major/minor device number of the directory -x Print major/minor device number of the block device */ #define FOR_mountpoint #include "toys.h" void mountpoint_main(void) { struct stat st1, st2; int res = 0; int quiet = toys.optflags & FLAG_q; toys.exitval = 1; // be pessimistic strncpy(toybuf, toys.optargs[0], sizeof(toybuf)); if (((toys.optflags & FLAG_x) && lstat(toybuf, &st1)) || stat(toybuf, &st1)) perror_exit("%s", toybuf); if (toys.optflags & FLAG_x){ if (S_ISBLK(st1.st_mode)) { if (!quiet) printf("%u:%u\n", major(st1.st_rdev), minor(st1.st_rdev)); toys.exitval = 0; return; } if (!quiet) printf("%s: not a block device\n", toybuf); return; } if(!S_ISDIR(st1.st_mode)){ if (!quiet) printf("%s: not a directory\n", toybuf); return; } strncat(toybuf, "/..", sizeof(toybuf)); stat(toybuf, &st2); res = (st1.st_dev != st2.st_dev) || (st1.st_dev == st2.st_dev && st1.st_ino == st2.st_ino); if (!quiet) printf("%s is %sa mountpoint\n", toys.optargs[0], res ? "" : "not "); if (toys.optflags & FLAG_d) printf("%u:%u\n", major(st1.st_dev), minor(st1.st_dev)); toys.exitval = res ? 0 : 1; }