/*************************************************************************
* (C) 2010 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
* by Michael Pounov <misho@openbsd-bg.org>
*
* $Author: misho $
* $Id: tool.c,v 1.1.1.1.2.2 2011/05/09 13:46:12 misho Exp $
*
*************************************************************************/
#include "global.h"
#include "tool.h"
/*
* sync_mksig() Make signature from chunk
* @id = chunk id
* @off = file offset
* @buf = chunk buffer for calculate signature
* @buflen = buffer length in bytes
* @sc = Chunk structure for fill
*/
inline void sync_mksig(int id, off_t off, u_char * __restrict buf, int buflen, sync_chunk_t * __restrict sc)
{
MD5_CTX ctx;
MD5_Init(&ctx);
memset(sc, 0, sizeof(sync_chunk_t));
sc->sc_magic = DLTSYNC_MAGIC;
sc->sc_id = id;
sc->sc_off = off;
sc->sc_len = buflen;
sc->sc_roll = crcAdler(buf, buflen);
MD5_Update(&ctx, buf, buflen);
MD5_Final(sc->sc_cksum, &ctx);
}
/*
* syncWriteNum() Write to handle converted number to bigendian
* @f = handle
* @ulNum = number to convert
* @nNumLen = length of number to bytes
* return: -1 error, != -1 writed bytes to handle
*/
inline int syncWriteNum(int f, u_long ulNum, int nNumLen)
{
u_char buf[sizeof ulNum];
register int i;
if (nNumLen < 1 || nNumLen > ULONG_MAX) {
syncSetErr(-1, "Illegal number len %d\n", nNumLen);
return -1;
}
for (i = nNumLen - 1; i; i--) {
buf[i] = (u_char) ulNum;
ulNum >>= 8;
}
return write(f, buf, nNumLen);
}
#ifndef HAVE_MKSTEMPS
#define TEMPCHARS "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
#define NUM_CHARS (sizeof(TEMPCHARS) - 1)
int
mkstemps(char *path, int slen)
{
char *start, *cp, *ep;
const char *tempchars = TEMPCHARS;
unsigned int tries = 1;
size_t len;
int fd;
assert(path);
len = strlen(path);
if (len == 0 || slen >= len) {
errno = EINVAL;
goto end;
} else
ep = path + len - slen;
for (start = ep; start > path && start[-1] == 'X'; start--) {
if (tries < INT_MAX / NUM_CHARS)
tries *= NUM_CHARS;
}
tries *= 2;
do {
for (cp = start; cp != ep; cp++)
*cp = tempchars[arc4random_uniform(NUM_CHARS)];
fd = open(path, O_CREAT | O_EXCL | O_RDWR, S_IRUSR | S_IWUSR);
if (fd != -1 || errno != EEXIST)
return fd;
} while (--tries);
errno = EEXIST;
end:
return -1;
}
#endif
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