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