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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
#include "asn1c_internal.h"
#include "asn1c_compat.h"
#ifndef MAXPATHLEN
#define MAXPATHLEN 1024
#endif
#ifndef DEFFILEMODE /* Normally in <sys/stat.h> */
#ifdef _WIN32
#define DEFFILEMODE (S_IREAD|S_IWRITE)
#else
#define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
#endif
#endif
#ifdef _WIN32
int mkstemp(char *template) {
char *tmpFN = _mktemp(template);
if(tmpFN)
return open(tmpFN, O_CREAT | O_EXCL | O_WRONLY, DEFFILEMODE);
else
return -1;
}
#undef HAVE_MKSTEMPS
#endif
#ifdef HAVE_MKSTEMPS
#undef mkstemp
#define mkstemp(foo) mkstemps(foo, 0)
#endif
FILE *
asn1c_open_file(const char *name, const char *ext, char **opt_tmpname) {
int created = 1;
#ifndef _WIN32
struct stat sb;
#endif
char *fname;
size_t len;
FILE *fp;
int ret;
int fd;
/*
* Compute filenames.
*/
len = strlen(name) + strlen(ext) + sizeof(".XXXXXX");
fname = alloca(len);
ret = snprintf(fname, len, "%s%s%s", name, ext,
opt_tmpname ? ".XXXXXX" : "");
assert(ret > 0 && ret < (ssize_t)len);
if(opt_tmpname) {
/*
* Create temporary file.
*/
fd = mkstemp(fname);
#ifndef _WIN32
(void)fchmod(fd, DEFFILEMODE);
#endif
} else {
/*
* Create specified file, or open the old one.
*/
fd = open(fname, O_CREAT | O_EXCL | O_WRONLY, DEFFILEMODE);
if(fd == -1 && errno == EEXIST) {
fd = open(fname, O_WRONLY, DEFFILEMODE);
created = 0;
}
}
if(fd == -1) {
perror(fname);
return NULL;
}
#ifndef _WIN32
/*
* Check sanity.
*/
if(fstat(fd, &sb) || !S_ISREG(sb.st_mode)) {
fprintf(stderr, "%s: Not a regular file\n", fname);
if(created) unlink(fname);
close(fd);
return NULL;
}
(void)ftruncate(fd, 0);
#else
_chsize(fd, 0);
#endif /* _WIN32 */
/*
* Convert file descriptor into file pointer.
*/
fp = fdopen(fd, "w");
if(fp == NULL) {
if(created) unlink(fname);
close(fd);
return NULL;
}
/* Return the temporary file name */
if(opt_tmpname) {
*opt_tmpname = strdup(fname);
if(*opt_tmpname) {
/* Successfull */
} else {
if(created) unlink(fname);
fclose(fp);
return NULL;
}
}
return fp;
}
char *
a1c_basename(const char *path) {
static char strbuf[MAXPATHLEN];
const char *pend;
const char *name;
pend = path + strlen(path);
if(pend == path) {
strcpy(strbuf, ".");
return strbuf;
}
/* Skip tailing slashes */
for(pend--; pend > path && *pend == '/'; pend--);
if(pend == path && *path == '/') {
strcpy(strbuf, "/");
return strbuf;
}
for(name = pend; name > path && name[-1] != '/'; name--);
if((pend - name) >= (int)sizeof(strbuf) - 1) {
errno = ENAMETOOLONG;
return 0;
}
memcpy(strbuf, name, pend - name + 1);
strbuf[pend - name + 1] = '\0';
return strbuf;
}
char *
a1c_dirname(const char *path) {
static char strbuf[MAXPATHLEN];
const char *pend;
const char *last = 0;
int in_slash = 0;
/* One-pass determination of the last char of the pathname */
for(pend = path; ; pend++) {
switch(*pend) {
case '\0': break;
case '/':
if(!in_slash) {
last = pend;
in_slash = 1;
}
continue;
default:
if(in_slash) in_slash = 0;
continue;
}
break;
}
if(last <= path) {
strcpy(strbuf, *path == '/' ? "/" : ".");
return strbuf;
}
if(!last) {
strcpy(strbuf, "/");
return strbuf;
}
if((last - path) >= (int)sizeof(strbuf)) {
errno = ENAMETOOLONG;
return 0;
}
memcpy(strbuf, path, last - path);
strbuf[last - path] = '\0';
return strbuf;
}
|
