1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/*
** 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 <internal.h>
#include <stdio.h>
#include <sys/param.h>
#include <errno.h>
#ifdef STDC_HEADERS
# include <string.h>
#endif
/* hashing function for pathnames */
int
path_hashfunc(char *key, int numbuckets)
{
char buf[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[MAXPATHLEN], dst[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;
if (dst[0] != '\0')
strcat(dst, "/");
strcat(dst, dirp);
if (mkdir(dst, 0777) == -1)
{
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", octlen - 1, (unsigned long)num);
oct[octlen - 1] = ' ';
}
|
