Annotation of libaitsync/src/tool.c, revision 1.1.1.1.2.3
1.1 misho 1: /*************************************************************************
2: * (C) 2010 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
1.1.1.1.2.3! misho 6: * $Id: tool.c,v 1.1.1.1.2.2 2011/05/09 13:46:12 misho Exp $
1.1 misho 7: *
1.1.1.1.2.3! misho 8: **************************************************************************
! 9: The ELWIX and AITNET software is distributed under the following
! 10: terms:
! 11:
! 12: All of the documentation and software included in the ELWIX and AITNET
! 13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
! 14:
! 15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
! 16: by Michael Pounov <misho@elwix.org>. All rights reserved.
! 17:
! 18: Redistribution and use in source and binary forms, with or without
! 19: modification, are permitted provided that the following conditions
! 20: are met:
! 21: 1. Redistributions of source code must retain the above copyright
! 22: notice, this list of conditions and the following disclaimer.
! 23: 2. Redistributions in binary form must reproduce the above copyright
! 24: notice, this list of conditions and the following disclaimer in the
! 25: documentation and/or other materials provided with the distribution.
! 26: 3. All advertising materials mentioning features or use of this software
! 27: must display the following acknowledgement:
! 28: This product includes software developed by Michael Pounov <misho@elwix.org>
! 29: ELWIX - Embedded LightWeight unIX and its contributors.
! 30: 4. Neither the name of AITNET nor the names of its contributors
! 31: may be used to endorse or promote products derived from this software
! 32: without specific prior written permission.
! 33:
! 34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
! 35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 44: SUCH DAMAGE.
! 45: */
1.1 misho 46: #include "global.h"
47: #include "tool.h"
48:
49:
50: /*
51: * sync_mksig() Make signature from chunk
52: * @id = chunk id
53: * @off = file offset
54: * @buf = chunk buffer for calculate signature
55: * @buflen = buffer length in bytes
56: * @sc = Chunk structure for fill
57: */
58: inline void sync_mksig(int id, off_t off, u_char * __restrict buf, int buflen, sync_chunk_t * __restrict sc)
59: {
60: MD5_CTX ctx;
61:
62: MD5_Init(&ctx);
63: memset(sc, 0, sizeof(sync_chunk_t));
64: sc->sc_magic = DLTSYNC_MAGIC;
65: sc->sc_id = id;
66: sc->sc_off = off;
67: sc->sc_len = buflen;
68: sc->sc_roll = crcAdler(buf, buflen);
69: MD5_Update(&ctx, buf, buflen);
70: MD5_Final(sc->sc_cksum, &ctx);
71: }
72:
73: /*
74: * syncWriteNum() Write to handle converted number to bigendian
75: * @f = handle
76: * @ulNum = number to convert
77: * @nNumLen = length of number to bytes
78: * return: -1 error, != -1 writed bytes to handle
79: */
80: inline int syncWriteNum(int f, u_long ulNum, int nNumLen)
81: {
82: u_char buf[sizeof ulNum];
83: register int i;
84:
85: if (nNumLen < 1 || nNumLen > ULONG_MAX) {
86: syncSetErr(-1, "Illegal number len %d\n", nNumLen);
87: return -1;
88: }
89:
90: for (i = nNumLen - 1; i; i--) {
91: buf[i] = (u_char) ulNum;
92: ulNum >>= 8;
93: }
94:
95: return write(f, buf, nNumLen);
96: }
1.1.1.1.2.1 misho 97:
98: #ifndef HAVE_MKSTEMPS
1.1.1.1.2.2 misho 99: #define TEMPCHARS "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
100: #define NUM_CHARS (sizeof(TEMPCHARS) - 1)
101:
102: int
103: mkstemps(char *path, int slen)
104: {
105: char *start, *cp, *ep;
106: const char *tempchars = TEMPCHARS;
107: unsigned int tries = 1;
108: size_t len;
109: int fd;
110:
111: assert(path);
112: len = strlen(path);
113: if (len == 0 || slen >= len) {
114: errno = EINVAL;
115: goto end;
116: } else
117: ep = path + len - slen;
118:
119: for (start = ep; start > path && start[-1] == 'X'; start--) {
120: if (tries < INT_MAX / NUM_CHARS)
121: tries *= NUM_CHARS;
122: }
123: tries *= 2;
124:
125: do {
126: for (cp = start; cp != ep; cp++)
127: *cp = tempchars[arc4random_uniform(NUM_CHARS)];
128:
129: fd = open(path, O_CREAT | O_EXCL | O_RDWR, S_IRUSR | S_IWUSR);
130: if (fd != -1 || errno != EEXIST)
131: return fd;
132: } while (--tries);
133:
134: errno = EEXIST;
135: end:
136: return -1;
137: }
1.1.1.1.2.1 misho 138: #endif
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