58da3b6bd2
The strlcat() and strlcpy() functions are only intended to be used by syslog.c internally (and syslogd), when building libsyslog. A user linking with libsyslog may have another library that provides strlcat() or strlcpy() replacements. We must therefore mark ours as weak functions so they can be overridden. This patch also add a convenience library for libsyslog, to control the build deps. for libsyslog. This is where external dependencies should be addded (explicitly) when syslog.c is updated from NetBSD. If you add new deps you likely want to mark them too as weak refs. Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
146 lines
4.1 KiB
C
146 lines
4.1 KiB
C
/*
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* Copyright (c) 1983, 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef SYSKLOGD_COMPAT_H_
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#define SYSKLOGD_COMPAT_H_
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#include <config.h>
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#include <pthread.h>
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#include <stdlib.h>
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#include <string.h>
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/*
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* The following macro is used to remove const cast-away warnings
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* from gcc -Wcast-qual; it should be used with caution because it
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* can hide valid errors; in particular most valid uses are in
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* situations where the API requires it, not to cast away string
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* constants. We don't use *intptr_t on purpose here and we are
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* explicit about unsigned long so that we don't have additional
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* dependencies.
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*/
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#define __UNCONST(a) ((void *)(unsigned long)(const void *)(a))
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/*
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* The functions strlcat() and strlcpy() may be available in either
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* the C library or another library the user links their application
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* with. So we must declare them as "weak" symbols in libsyslog.
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*/
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#ifndef weak_alias
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# define weak_alias(name, aliasname) _weak_alias (name, aliasname)
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# define _weak_alias(name, aliasname) \
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extern __typeof (name) aliasname __attribute__ ((weak, alias (#name)))
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#endif
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/* Pthread wrapper for BSD LWP mutexes */
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typedef pthread_mutex_t mutex_t;
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#ifndef mutex_lock
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#define MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
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#define mutex_lock(m) pthread_mutex_lock(m)
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#define mutex_unlock(m) pthread_mutex_unlock(m)
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#endif
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/* BSD have sa_len, Linux/GNU doesn't */
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#if defined(_AIX) || (defined(BSD) && (BSD >= 199006)) /* sa_len was added with 4.3-Reno */
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#define HAVE_SA_LEN
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#endif
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#ifndef HAVE_STRLCPY
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size_t strlcpy(char *dst, const char *src, size_t siz);
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#endif
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#ifndef HAVE_STRLCAT
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size_t strlcat(char *dst, const char *src, size_t siz);
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#endif
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#ifndef HAVE_PIDFILE
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int pidfile(const char *basename);
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#endif
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#ifndef HAVE_GETPROGNAME
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static inline char *getprogname(void)
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{
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extern char *__progname;
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return __progname;
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}
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#endif
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#ifndef HAVE_STRTOBYTES
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static inline int strtobytes(char *arg)
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{
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int mod = 0, bytes;
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size_t pos;
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if (!arg)
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return -1;
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pos = strspn(arg, "0123456789");
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if (arg[pos] != 0) {
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if (arg[pos] == 'G')
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mod = 3;
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else if (arg[pos] == 'M')
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mod = 2;
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else if (arg[pos] == 'k')
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mod = 1;
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else
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return -1;
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arg[pos] = 0;
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}
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bytes = atoi(arg);
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while (mod--)
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bytes *= 1000;
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return bytes;
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}
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#endif
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static inline void parse_rotation(char *optarg, off_t *size, int *num)
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{
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char buf[100];
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char *c;
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int sz = 0, cnt = 0;
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strlcpy(buf, optarg, sizeof(buf));
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c = strchr(buf, ':');
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if (c) {
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*c++ = 0;
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cnt = atoi(c);
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}
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sz = strtobytes(buf);
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if (sz > 0)
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*size = sz;
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if (cnt > 0)
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*num = cnt;
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}
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#endif /* SYSKLOGD_COMPAT_H_ */
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