view lib/getmountlist.c @ 1278:324306321d82 draft

Initial cleanup of last: mostly whitespace, move no record test to start of loop, don't bother to stat an empty file to report when an empty log was created (just report current time).
author Rob Landley <>
date Sat, 10 May 2014 13:20:03 -0500
parents 11cf9b97fae7
children b2cc738d3cfc
line wrap: on
line source

/* getmountlist.c - Get a linked list of mount points, with stat information.
 * Copyright 2006 Rob Landley <>

#include "toys.h"

#include <mntent.h>

// Get list of mounted filesystems, including stat and statvfs info.
// Returns a reversed list, which is good for finding overmounts and such.

struct mtab_list *xgetmountlist(char *path)
  struct mtab_list *mtlist, *mt;
  struct mntent *me;
  FILE *fp;

  if (!path) path = "/proc/mounts";
  if (!(fp = setmntent(path, "r"))) perror_exit("bad %s", path);

  // The "test" part of the loop is done before the first time through and
  // again after each "increment", so putting the actual load there avoids
  // duplicating it. If the load was NULL, the loop stops.

  for (mtlist = 0; (me = getmntent(fp)); mtlist = mt) {
    mt = xzalloc(sizeof(struct mtab_list) + strlen(me->mnt_fsname) +
      strlen(me->mnt_dir) + strlen(me->mnt_type) + 3);
    mt->next = mtlist;

    // Collect details about mounted filesystem (don't bother for /etc/fstab).
    stat(me->mnt_dir, &(mt->stat));
    statvfs(me->mnt_dir, &(mt->statvfs));

    // Remember information from /proc/mounts
    mt->dir = stpcpy(mt->type, me->mnt_type) + 1;
    mt->device = stpcpy(mt->dir, me->mnt_dir) + 1;
    strcpy(mt->device, me->mnt_fsname);

  return mtlist;