File: [local] / src / usr.bin / rsync / symlinks.c (download)
Revision 1.5.4.1, Tue Nov 9 13:41:24 2021 UTC (2 years, 7 months ago) by benno
Branch: OPENBSD_6_9
Changes since 1.5: +4 -4 lines
rpki-client(8) should handle CA misbehaviours as soft-errors.
This is a merge of usr.sbin/rpki-client and usr.bin/rsync from current
and includes all commits in rpki-client 7.5 up to Tue Nov 9 11:03:40
2021 and to openrsync up to Wed Nov 3 14:42:13 2021, including:
* Make rpki-client more resilient regarding untrusted input:
- fail repository synchronisation after 15min runtime
- limit the number of publication points per TAL
- don't allow DOCTYPE definitions in RRDP XML files
- fix detection of HTTP redirect loops.
* limit the number of concurrent rsync processes.
* fix CRLF in tal files.
This is patches/6.9/common/021_rpki.patch.sig
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/* $Id: symlinks.c,v 1.5.4.1 2021/11/09 13:41:24 benno Exp $ */
/*
* Copyright (c) 2019 Kristaps Dzonsons <kristaps@bsd.lv>
*
* 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.
*/
#include <assert.h>
#include <stdint.h>
#include <stdlib.h>
#include <limits.h>
#include <unistd.h>
#include "extern.h"
/*
* Allocate space for a readlink(2) invocation.
* Returns NULL on failure or a buffer otherwise.
* The buffer must be passed to free() by the caller.
*/
char *
symlink_read(const char *path)
{
char *buf = NULL;
size_t sz;
ssize_t nsz = 0;
void *pp;
for (sz = PATH_MAX; ; sz *= 2) {
if ((pp = realloc(buf, sz + 1)) == NULL) {
ERR("realloc");
free(buf);
return NULL;
}
buf = pp;
if ((nsz = readlink(path, buf, sz)) == -1) {
ERR("%s: readlink", path);
free(buf);
return NULL;
} else if (nsz == 0) {
ERRX("%s: empty link", path);
free(buf);
return NULL;
} else if ((size_t)nsz < sz)
break;
}
assert(buf != NULL);
assert(nsz > 0);
buf[nsz] = '\0';
return buf;
}
/*
* Allocate space for a readlinkat(2) invocation.
* Returns NULL on failure or a buffer otherwise.
* The buffer must be passed to free() by the caller.
*/
char *
symlinkat_read(int fd, const char *path)
{
char *buf = NULL;
size_t sz;
ssize_t nsz = 0;
void *pp;
for (sz = PATH_MAX; ; sz *= 2) {
if ((pp = realloc(buf, sz + 1)) == NULL) {
ERR("realloc");
free(buf);
return NULL;
}
buf = pp;
if ((nsz = readlinkat(fd, path, buf, sz)) == -1) {
ERR("%s: readlinkat", path);
free(buf);
return NULL;
} else if (nsz == 0) {
ERRX("%s: empty link", path);
free(buf);
return NULL;
} else if ((size_t)nsz < sz)
break;
}
assert(buf != NULL);
assert(nsz > 0);
buf[nsz] = '\0';
return buf;
}