sysklogd/src/compat.h

144 lines
3.9 KiB
C

/*
* Copyright (c) 1983, 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef SYSKLOGD_COMPAT_H_
#define SYSKLOGD_COMPAT_H_
#include <config.h>
#include <pthread.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
/*
* The following macro is used to remove const cast-away warnings
* from gcc -Wcast-qual; it should be used with caution because it
* can hide valid errors; in particular most valid uses are in
* situations where the API requires it, not to cast away string
* constants. We don't use *intptr_t on purpose here and we are
* explicit about unsigned long so that we don't have additional
* dependencies.
*/
#define __UNCONST(a) ((void *)(unsigned long)(const void *)(a))
/* Pthread wrapper for BSD LWP mutexes */
typedef pthread_mutex_t mutex_t;
#ifndef mutex_lock
#define MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
#define mutex_lock(m) pthread_mutex_lock(m)
#define mutex_unlock(m) pthread_mutex_unlock(m)
#endif
/* BSD have sa_len, Linux/GNU doesn't, added with 4.3-Reno */
#if defined(_AIX) || (defined(BSD) && (BSD >= 199006))
#define HAVE_SA_LEN
#endif
#ifndef HAVE_STRLCPY
#define strlcpy __strlcpy
size_t strlcpy(char *dst, const char *src, size_t siz);
#endif
#ifndef HAVE_STRLCAT
#define strlcat __strlcat
size_t strlcat(char *dst, const char *src, size_t siz);
#endif
#ifndef HAVE_PIDFILE
#define pidfile __pidfile
int pidfile(const char *basename);
#endif
#ifndef HAVE_UTIMENSAT
#define utimensat __utimensat
int utimensat(int dirfd, const char *pathname, const struct timespec ts[2], int flags);
#endif
#ifndef HAVE_GETPROGNAME
static inline char *getprogname(void)
{
extern char *__progname;
return __progname;
}
#endif
#ifndef HAVE_STRTOBYTES
static inline int strtobytes(char *arg)
{
int mod = 0, bytes;
size_t pos;
if (!arg)
return -1;
pos = strspn(arg, "0123456789");
if (arg[pos] != 0) {
if (arg[pos] == 'G')
mod = 3;
else if (arg[pos] == 'M')
mod = 2;
else if (arg[pos] == 'k')
mod = 1;
else
return -1;
arg[pos] = 0;
}
bytes = atoi(arg);
while (mod--)
bytes *= 1000;
return bytes;
}
#endif
static inline void parse_rotation(char *optarg, off_t *size, int *num)
{
char buf[100];
char *c;
int sz = 0, cnt = 0;
strlcpy(buf, optarg, sizeof(buf));
c = strchr(buf, ':');
if (c) {
*c++ = 0;
cnt = atoi(c);
}
sz = strtobytes(buf);
if (sz > 0)
*size = sz;
if (cnt > 0)
*num = cnt;
}
#endif /* SYSKLOGD_COMPAT_H_ */