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/*
Copyright (C) 2006-2016 Con Kolivas
Copyright (C) 2011 Peter Hyman
Copyright (C) 1998 Andrew Tridgell
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, see <http://www.gnu.org/licenses/>.
*/
#ifndef LRZIP_UTIL_H
#define LRZIP_UTIL_H
#include "lrzip_private.h"
#include <errno.h>
#include <semaphore.h>
#include <stdarg.h>
#include <unistd.h>
#include <fcntl.h>
void register_infile(rzip_control *control, const char *name, char delete);
void register_outfile(rzip_control *control, const char *name, char delete);
void unlink_files(rzip_control *control);
void register_outputfile(rzip_control *control, FILE *f);
void fatal_exit(rzip_control *control);
/* Failure when there is likely to be a meaningful error in perror */
static inline void fatal(const rzip_control *control, unsigned int line, const char *file, const char *func, const char *format, ...)
{
va_list ap;
va_start(ap, format);
if (!control->log_cb) {
vfprintf(stderr, format, ap);
perror(NULL);
} else
control->log_cb(control->log_data, 0, line, file, func, format, ap);
va_end(ap);
if (!control->library_mode)
fatal_exit((rzip_control*)control);
}
#ifdef fatal
# undef fatal
#endif
#define fatal(...) fatal(control, __LINE__, __FILE__, __func__, __VA_ARGS__)
#define fatal_return(stuff, ...) do { \
fatal stuff; \
return __VA_ARGS__; \
} while (0)
#define fatal_goto(stuff, label) do { \
fatal stuff; \
goto label; \
} while (0)
static inline void failure(const rzip_control *control, unsigned int line, const char *file, const char *func, const char *format, ...)
{
va_list ap;
va_start(ap, format);
if (!control->log_cb)
vfprintf(stderr, format, ap);
else
control->log_cb(control->log_data, 0, line, file, func, format, ap);
va_end(ap);
if (!control->library_mode)
fatal_exit((rzip_control*)control);
}
#ifdef failure
# undef failure
#endif
#define failure(...) failure(control, __LINE__, __FILE__, __func__, __VA_ARGS__)
#define failure_return(stuff, ...) do { \
failure stuff; \
return __VA_ARGS__; \
} while (0)
#define failure_goto(stuff, label) do { \
failure stuff; \
goto label; \
} while (0)
void setup_overhead(rzip_control *control);
void setup_ram(rzip_control *control);
void round_to_page(i64 *size);
size_t round_up_page(rzip_control *control, size_t len);
bool get_rand(rzip_control *control, uchar *buf, int len);
bool read_config(rzip_control *control);
void lrz_stretch(rzip_control *control);
void lrz_stretch2(rzip_control *control);
bool lrz_crypt(const rzip_control *control, uchar *buf, i64 len, const uchar *salt, int encrypt);
#define LRZ_DECRYPT (0)
#define LRZ_ENCRYPT (1)
static inline bool lrz_encrypt(const rzip_control *control, uchar *buf, i64 len, const uchar *salt)
{
return lrz_crypt(control, buf, len, salt, LRZ_ENCRYPT);
}
static inline bool lrz_decrypt(const rzip_control *control, uchar *buf, i64 len, const uchar *salt)
{
return lrz_crypt(control, buf, len, salt, LRZ_DECRYPT);
}
/* ck specific wrappers for true unnamed semaphore usage on platforms
* that support them and for apple which does not. We use a single byte across
* a pipe to emulate semaphore behaviour there. */
#ifdef __APPLE__
static inline void cksem_init(const rzip_control *control, cksem_t *cksem)
{
int flags, fd, i;
if (pipe(cksem->pipefd) == -1)
fatal("Failed pipe errno=%d", errno);
/* Make the pipes FD_CLOEXEC to allow them to close should we call
* execv on restart. */
for (i = 0; i < 2; i++) {
fd = cksem->pipefd[i];
flags = fcntl(fd, F_GETFD, 0);
flags |= FD_CLOEXEC;
if (fcntl(fd, F_SETFD, flags) == -1)
fatal("Failed to fcntl errno=%d", errno);
}
}
static inline void cksem_post(const rzip_control *control, cksem_t *cksem)
{
const char buf = 1;
int ret;
ret = write(cksem->pipefd[1], &buf, 1);
if (unlikely(ret == 0))
fatal("Failed to write in cksem_post errno=%d", errno);
}
static inline void cksem_wait(const rzip_control *control, cksem_t *cksem)
{
char buf;
int ret;
ret = read(cksem->pipefd[0], &buf, 1);
if (unlikely(ret == 0))
fatal("Failed to read in cksem_post errno=%d", errno);
}
#else
static inline void cksem_init(const rzip_control *control, cksem_t *cksem)
{
int ret;
if ((ret = sem_init(cksem, 0, 0)))
fatal("Failed to sem_init ret=%d errno=%d", ret, errno);
}
static inline void cksem_post(const rzip_control *control, cksem_t *cksem)
{
if (unlikely(sem_post(cksem)))
fatal("Failed to sem_post errno=%d cksem=0x%p", errno, cksem);
}
static inline void cksem_wait(const rzip_control *control, cksem_t *cksem)
{
if (unlikely(sem_wait(cksem)))
fatal("Failed to sem_wait errno=%d cksem=0x%p", errno, cksem);
}
#endif
#endif
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