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- an empty middle term in ?: violates ISO C

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- use shorter boilerplate and use C89 style comments
This commit is contained in:
Bernhard Reutner-Fischer 2005-10-15 14:13:09 +00:00
parent b4b6d26287
commit 94c3331d47
1 changed files with 22 additions and 31 deletions
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53
libbb/loop.c
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@ -2,21 +2,9 @@
/*
* Utility routines.
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
* Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
@ -75,11 +63,12 @@ extern int del_loop(const char *device)
return rc;
}
// Returns 0 if mounted RW, 1 if mounted read-only, <0 for error.
// *device is loop device to use, or if *device==NULL finds a loop device to
// mount it on and sets *device to a strdup of that loop device name. This
// search will re-use an existing loop device already bound to that
// file/offset if it finds one.
/* Returns 0 if mounted RW, 1 if mounted read-only, <0 for error.
*device is loop device to use, or if *device==NULL finds a loop device to
mount it on and sets *device to a strdup of that loop device name. This
search will re-use an existing loop device already bound to that
file/offset if it finds one.
*/
extern int set_loop(char **device, const char *file, int offset)
{
char dev[20];
@ -87,37 +76,39 @@ extern int set_loop(char **device, const char *file, int offset)
struct stat statbuf;
int i, dfd, ffd, mode, rc=1;
// Open the file. Barf if this doesn't work.
/* Open the file. Barf if this doesn't work. */
if((ffd = open(file, mode=O_RDWR))<0 && (ffd = open(file,mode=O_RDONLY))<0)
return errno;
// Find a loop device
/* Find a loop device. */
for(i=0;rc;i++) {
sprintf(dev, LOOP_FORMAT, i++);
// Ran out of block devices, return failure.
if(stat(*device ? : dev, &statbuf) || !S_ISBLK(statbuf.st_mode)) {
/* Ran out of block devices, return failure. */
if(stat(*device ? *device : dev, &statbuf) ||
!S_ISBLK(statbuf.st_mode)) {
rc=ENOENT;
break;
}
// Open the sucker and check its loopiness.
/* Open the sucker and check its loopiness. */
if((dfd=open(dev, mode))<0 && errno==EROFS)
dfd=open(dev,mode=O_RDONLY);
if(dfd<0) continue;
rc=ioctl(dfd, BB_LOOP_GET_STATUS, &loopinfo);
// If device free, claim it.
/* If device free, claim it. */
if(rc && errno==ENXIO) {
memset(&loopinfo, 0, sizeof(loopinfo));
safe_strncpy(loopinfo.lo_file_name, file, LO_NAME_SIZE);
loopinfo.lo_offset = offset;
// Associate free loop device with file
/* Associate free loop device with file. */
if(!ioctl(dfd, LOOP_SET_FD, ffd) &&
!ioctl(dfd, BB_LOOP_SET_STATUS, &loopinfo)) rc=0;
else ioctl(dfd, LOOP_CLR_FD, 0);
// If this block device already set up right, re-use it.
// (Yes this is racy, but associating two loop devices with the same
// file isn't pretty either. In general, mounting the same file twice
// without using losetup manually is problematic.)
/* If this block device already set up right, re-use it.
(Yes this is racy, but associating two loop devices with the same
file isn't pretty either. In general, mounting the same file twice
without using losetup manually is problematic.)
*/
} else if(strcmp(file,loopinfo.lo_file_name)
|| offset!=loopinfo.lo_offset) rc=1;
close(dfd);