171 lines
2.9 KiB
C
171 lines
2.9 KiB
C
/*
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** Copyright 1998-2003 University of Illinois Board of Trustees
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** Copyright 1998-2003 Mark D. Roth
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** All rights reserved.
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**
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** util.c - miscellaneous utility code for libtar
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**
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** Mark D. Roth <roth@uiuc.edu>
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** Campus Information Technologies and Educational Services
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** University of Illinois at Urbana-Champaign
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*/
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#include <libtarint/internal.h>
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#include <stdio.h>
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#include <libtar/compat.h>
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#include <errno.h>
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#ifdef STDC_HEADERS
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# include <string.h>
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#endif
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#if defined(_WIN32) && !defined(__CYGWIN__)
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#include <direct.h>
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#else
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#include <sys/param.h>
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#endif
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/* hashing function for pathnames */
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int
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path_hashfunc(char *key, int numbuckets)
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{
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char buf[TAR_MAXPATHLEN];
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char *p;
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strcpy(buf, key);
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p = basename(buf);
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return (((unsigned int)p[0]) % numbuckets);
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}
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/* matching function for dev_t's */
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int
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dev_match(dev_t *dev1, dev_t *dev2)
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{
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return !memcmp(dev1, dev2, sizeof(dev_t));
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}
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/* matching function for ino_t's */
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int
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ino_match(ino_t *ino1, ino_t *ino2)
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{
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return !memcmp(ino1, ino2, sizeof(ino_t));
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}
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/* hashing function for dev_t's */
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int
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dev_hash(dev_t *dev)
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{
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return *dev % 16;
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}
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/* hashing function for ino_t's */
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int
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ino_hash(ino_t *inode)
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{
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return *inode % 256;
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}
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/*
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** mkdirhier() - create all directories in a given path
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** returns:
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** 0 success
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** 1 all directories already exist
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** -1 (and sets errno) error
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*/
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int
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mkdirhier(char *path)
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{
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char src[TAR_MAXPATHLEN], dst[TAR_MAXPATHLEN] = "";
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char *dirp, *nextp = src;
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int retval = 1;
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if (strlcpy(src, path, sizeof(src)) > sizeof(src))
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{
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errno = ENAMETOOLONG;
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return -1;
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}
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if (path[0] == '/')
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strcpy(dst, "/");
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while ((dirp = strsep(&nextp, "/")) != NULL)
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{
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if (*dirp == '\0')
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continue;
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if (dst[0] != '\0')
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strcat(dst, "/");
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strcat(dst, dirp);
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if (
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#if defined(_WIN32) && !defined(__CYGWIN__)
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mkdir(dst) == -1
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#else
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mkdir(dst, 0777) == -1
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#endif
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)
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{
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#ifdef __BORLANDC__
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/* There is a bug in the Borland Run time library which makes MKDIR
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return EACCES when it should return EEXIST
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if it is some other error besides directory exists
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then return false */
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if ( errno == EACCES)
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{
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errno = EEXIST;
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}
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#endif
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if (errno != EEXIST)
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return -1;
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}
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else
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retval = 0;
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}
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return retval;
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}
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/* calculate header checksum */
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int
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th_crc_calc(TAR *t)
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{
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int i, sum = 0;
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for (i = 0; i < T_BLOCKSIZE; i++)
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sum += ((unsigned char *)(&(t->th_buf)))[i];
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for (i = 0; i < 8; i++)
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sum += (' ' - (unsigned char)t->th_buf.chksum[i]);
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return sum;
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}
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/* string-octal to integer conversion */
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int
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oct_to_int(char *oct)
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{
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int i;
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sscanf(oct, "%o", &i);
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return i;
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}
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/* integer to string-octal conversion, no NULL */
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void
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int_to_oct_nonull(int num, char *oct, size_t octlen)
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{
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snprintf(oct, octlen, "%*lo", (int)(octlen-1), (unsigned long)num);
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oct[octlen - 1] = ' ';
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}
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