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libc: add ftw / nftw functions

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Please see "man 3 ftw" for a description of the
ftw / nftw functions.

This code is taken directly from netbsd unmodified.

Change-Id: Ia4879ac57212b424adf5281b5e92858e216d0f14
This commit is contained in:
Nick Kralevich
2012-09-12 13:21:25 -07:00
committed by Elliott Hughes
parent e895e6deaa
commit 5e58ea07d4
5 changed files with 296 additions and 0 deletions
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98
libc/upstream-netbsd/libc/gen/ftw.c Normal file
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@@ -0,0 +1,98 @@
/* $NetBSD: ftw.c,v 1.1 2005/12/30 23:07:32 agc Exp $ */
/* From OpenBSD: ftw.c,v 1.2 2003/07/21 21:15:32 millert Exp */
/*
* Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F39502-99-1-0512.
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: ftw.c,v 1.1 2005/12/30 23:07:32 agc Exp $");
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fts.h>
#include <ftw.h>
#include <limits.h>
int
ftw(const char *path, int (*fn)(const char *, const struct stat *, int),
int nfds)
{
/* LINTED */
char * const paths[2] = { __UNCONST(path), NULL };
FTSENT *cur;
FTS *ftsp;
int fnflag, error, sverrno;
/* XXX - nfds is currently unused */
if (nfds < 1 || nfds > OPEN_MAX) {
errno = EINVAL;
return (-1);
}
ftsp = fts_open(paths, FTS_COMFOLLOW | FTS_NOCHDIR, NULL);
if (ftsp == NULL)
return (-1);
error = 0;
while ((cur = fts_read(ftsp)) != NULL) {
switch (cur->fts_info) {
case FTS_D:
fnflag = FTW_D;
break;
case FTS_DNR:
fnflag = FTW_DNR;
break;
case FTS_DP:
/* we only visit in preorder */
continue;
case FTS_F:
case FTS_DEFAULT:
fnflag = FTW_F;
break;
case FTS_NS:
case FTS_NSOK:
case FTS_SLNONE:
fnflag = FTW_NS;
break;
case FTS_SL:
fnflag = FTW_SL;
break;
case FTS_DC:
errno = ELOOP;
/* FALLTHROUGH */
default:
error = -1;
goto done;
}
error = fn(cur->fts_path, cur->fts_statp, fnflag);
if (error != 0)
break;
}
done:
sverrno = errno;
if (fts_close(ftsp) != 0 && error == 0)
error = -1;
else
errno = sverrno;
return (error);
}

114
libc/upstream-netbsd/libc/gen/nftw.c Normal file
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@@ -0,0 +1,114 @@
/* $NetBSD */
/* From OpenBSD: nftw.c,v 1.2 2003/07/21 21:15:32 millert Exp */
/*
* Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F39502-99-1-0512.
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: nftw.c,v 1.1 2005/12/30 23:07:32 agc Exp $");
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fts.h>
#include <ftw.h>
#include <limits.h>
int
nftw(const char *path, int (*fn)(const char *, const struct stat *, int,
struct FTW *), int nfds, int ftwflags)
{
/* LINTED */
char * const paths[2] = { __UNCONST(path), NULL };
struct FTW f;
FTSENT *cur;
FTS *ftsp;
int ftsflags, fnflag, error, postorder, sverrno;
/* XXX - nfds is currently unused */
if (nfds < 1 || nfds > OPEN_MAX) {
errno = EINVAL;
return (-1);
}
ftsflags = FTS_COMFOLLOW;
if (!(ftwflags & FTW_CHDIR))
ftsflags |= FTS_NOCHDIR;
if (ftwflags & FTW_MOUNT)
ftsflags |= FTS_XDEV;
if (ftwflags & FTW_PHYS)
ftsflags |= FTS_PHYSICAL;
postorder = (ftwflags & FTW_DEPTH) != 0;
ftsp = fts_open(paths, ftsflags, NULL);
if (ftsp == NULL)
return (-1);
error = 0;
while ((cur = fts_read(ftsp)) != NULL) {
switch (cur->fts_info) {
case FTS_D:
if (postorder)
continue;
fnflag = FTW_D;
break;
case FTS_DNR:
fnflag = FTW_DNR;
break;
case FTS_DP:
if (!postorder)
continue;
fnflag = FTW_DP;
break;
case FTS_F:
case FTS_DEFAULT:
fnflag = FTW_F;
break;
case FTS_NS:
case FTS_NSOK:
fnflag = FTW_NS;
break;
case FTS_SL:
fnflag = FTW_SL;
break;
case FTS_SLNONE:
fnflag = FTW_SLN;
break;
case FTS_DC:
errno = ELOOP;
/* FALLTHROUGH */
default:
error = -1;
goto done;
}
f.base = cur->fts_pathlen - cur->fts_namelen;
f.level = cur->fts_level;
error = fn(cur->fts_path, cur->fts_statp, fnflag, &f);
if (error != 0)
break;
}
done:
sverrno = errno;
(void) fts_close(ftsp);
errno = sverrno;
return (error);
}