/
unix.c
310 lines (235 loc) · 7.5 KB
1
2
3
4
5
6
7
8
/*
* Unix support routines for PhysicsFS.
*
* Please see the file LICENSE in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
9
10
11
12
#if HAVE_CONFIG_H
# include <config.h>
#endif
13
14
#if (!defined __BEOS__) /* BeOS uses beos.cpp and posix.c ... */
15
16
17
18
19
20
#if ((defined __APPLE__) && (defined __MACH__))
# if (!defined __DARWIN__)
# define __DARWIN__
# endif
#endif
21
22
#include <stdio.h>
#include <stdlib.h>
23
24
#include <string.h>
#include <ctype.h>
25
#include <pthread.h>
26
27
28
29
#include <unistd.h>
#include <sys/types.h>
#include <pwd.h>
#include <sys/stat.h>
30
#include <sys/param.h>
31
32
33
#include <dirent.h>
#include <time.h>
#include <errno.h>
34
35
36
37
#if (!defined __DARWIN__)
#include <mntent.h>
#else
38
39
#include <sys/ucred.h>
#endif
40
41
42
43
#include <sys/mount.h>
44
45
46
47
48
49
#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"
const char *__PHYSFS_platformDirSeparator = "/";
50
51
52
53
54
55
56
57
58
59
60
61
62
63
int __PHYSFS_platformInit(void)
{
return(1); /* always succeed. */
} /* __PHYSFS_platformInit */
int __PHYSFS_platformDeinit(void)
{
return(1); /* always succeed. */
} /* __PHYSFS_platformDeinit */
64
65
66
67
68
69
70
71
72
73
#if (defined __DARWIN__)
char **__PHYSFS_platformDetectAvailableCDs(void)
{
char **retval = (char **) malloc(sizeof (char *));
int cd_count = 1; /* We count the NULL entry. */
struct statfs* mntbufp = NULL;
int mounts;
int ii;
74
75
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
76
77
78
79
80
81
82
mounts = getmntinfo( &mntbufp, MNT_WAIT );
for ( ii=0; ii < mounts; ++ii ) {
int add_it = 0;
if ( strcmp( mntbufp[ii].f_fstypename, "iso9660") == 0 )
add_it = 1;
83
84
else if ( strcmp( mntbufp[ii].f_fstypename, "cd9660") == 0 )
add_it = 1;
85
86
/* add other mount types here */
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
if (add_it)
{
char **tmp = realloc(retval, sizeof (char *) * cd_count + 1);
if (tmp)
{
retval = tmp;
retval[cd_count-1] = (char *)
malloc(strlen(mntbufp[ ii ].f_mntonname) + 1);
if (retval[cd_count-1])
{
strcpy(retval[cd_count-1], mntbufp[ ii ].f_mntonname);
cd_count++;
} /* if */
} /* if */
} /* if */
}
free( mntbufp );
retval[cd_count - 1] = NULL;
return(retval);
} /* __PHYSFS_platformDetectAvailableCDs */
#else /* non-Darwin implementation... */
115
116
char **__PHYSFS_platformDetectAvailableCDs(void)
{
117
118
119
120
121
char **retval = (char **) malloc(sizeof (char *));
int cd_count = 1; /* We count the NULL entry. */
FILE *mounts = NULL;
struct mntent *ent = NULL;
122
123
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
124
125
126
127
128
129
130
131
132
*retval = NULL;
mounts = setmntent("/etc/mtab", "r");
BAIL_IF_MACRO(mounts == NULL, ERR_IO_ERROR, retval);
while ( (ent = getmntent(mounts)) != NULL )
{
int add_it = 0;
if (strcmp(ent->mnt_type, "iso9660") == 0)
add_it = 1;
133
134
/* add other mount types here */
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
if (add_it)
{
char **tmp = realloc(retval, sizeof (char *) * cd_count + 1);
if (tmp)
{
retval = tmp;
retval[cd_count-1] = (char *) malloc(strlen(ent->mnt_dir) + 1);
if (retval[cd_count-1])
{
strcpy(retval[cd_count-1], ent->mnt_dir);
cd_count++;
} /* if */
} /* if */
} /* if */
} /* while */
endmntent(mounts);
153
154
retval[cd_count - 1] = NULL;
155
return(retval);
156
157
158
} /* __PHYSFS_platformDetectAvailableCDs */
#endif
159
160
161
162
/* this is in posix.c ... */
extern char *__PHYSFS_platformCopyEnvironmentVariable(const char *varname);
163
164
165
166
167
168
169
170
171
172
173
174
/*
* See where program (bin) resides in the $PATH specified by (envr).
* returns a copy of the first element in envr that contains it, or NULL
* if it doesn't exist or there were other problems. PHYSFS_SetError() is
* called if we have a problem.
*
* (envr) will be scribbled over, and you are expected to free() the
* return value when you're done with it.
*/
static char *findBinaryInPath(const char *bin, char *envr)
175
{
176
177
178
size_t alloc_size = 0;
char *exe = NULL;
char *start = envr;
179
180
char *ptr;
181
182
BAIL_IF_MACRO(bin == NULL, ERR_INVALID_ARGUMENT, NULL);
BAIL_IF_MACRO(envr == NULL, ERR_INVALID_ARGUMENT, NULL);
183
184
185
do
{
186
187
size_t size;
ptr = strchr(start, ':'); /* find next $PATH separator. */
188
189
190
if (ptr)
*ptr = '\0';
191
192
size = strlen(start) + strlen(bin) + 2;
if (size > alloc_size)
193
{
194
195
196
197
198
199
200
201
202
203
char *x = (char *) realloc(exe, size);
if (x == NULL)
{
if (exe != NULL)
free(exe);
BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
} /* if */
alloc_size = size;
exe = x;
204
} /* if */
205
206
/* build full binary path... */
207
strcpy(exe, start);
208
209
if (exe[strlen(exe) - 1] != '/')
strcat(exe, "/");
210
211
212
strcat(exe, bin);
if (access(exe, X_OK) == 0) /* Exists as executable? We're done. */
213
{
214
215
216
strcpy(exe, start); /* i'm lazy. piss off. */
return(exe);
} /* if */
217
218
start = ptr + 1; /* start points to beginning of next element. */
219
220
} while (ptr != NULL);
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
if (exe != NULL)
free(exe);
return(NULL); /* doesn't exist in path. */
} /* findBinaryInPath */
char *__PHYSFS_platformCalcBaseDir(const char *argv0)
{
/* If there isn't a path on argv0, then look through the $PATH for it. */
char *retval;
char *envr;
if (strchr(argv0, '/') != NULL) /* default behaviour can handle this. */
return(NULL);
238
envr = __PHYSFS_platformCopyEnvironmentVariable("PATH");
239
240
BAIL_IF_MACRO(!envr, NULL, NULL);
retval = findBinaryInPath(argv0, envr);
241
242
243
244
245
free(envr);
return(retval);
} /* __PHYSFS_platformCalcBaseDir */
246
PHYSFS_uint64 __PHYSFS_platformGetThreadID(void)
247
{
248
return((PHYSFS_uint64) ((PHYSFS_uint32) pthread_self()));
249
250
251
} /* __PHYSFS_platformGetThreadID */
252
253
254
/* Much like my college days, try to sleep for 10 milliseconds at a time... */
void __PHYSFS_platformTimeslice(void)
{
255
usleep( 10 * 1000 ); /* don't care if it fails. */
256
257
258
} /* __PHYSFS_platformTimeslice */
259
260
261
262
263
264
265
char *__PHYSFS_platformRealPath(const char *path)
{
char resolved_path[MAXPATHLEN];
char *retval = NULL;
errno = 0;
BAIL_IF_MACRO(!realpath(path, resolved_path), strerror(errno), NULL);
266
retval = (char *) malloc(strlen(resolved_path) + 1);
267
268
269
270
271
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
strcpy(retval, resolved_path);
return(retval);
} /* __PHYSFS_platformRealPath */
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
void *__PHYSFS_platformCreateMutex(void)
{
int rc;
pthread_mutex_t *m = (pthread_mutex_t *) malloc(sizeof (pthread_mutex_t));
BAIL_IF_MACRO(m == NULL, ERR_OUT_OF_MEMORY, NULL);
rc = pthread_mutex_init(m, NULL);
if (rc != 0)
{
free(m);
BAIL_MACRO(strerror(rc), NULL);
} /* if */
return((void *) m);
} /* __PHYSFS_platformCreateMutex */
void __PHYSFS_platformDestroyMutex(void *mutex)
{
pthread_mutex_destroy((pthread_mutex_t *) mutex);
free(mutex);
} /* __PHYSFS_platformDestroyMutex */
int __PHYSFS_platformGrabMutex(void *mutex)
{
return(pthread_mutex_lock((pthread_mutex_t *) mutex) == 0);
} /* __PHYSFS_platformGrabMutex */
void __PHYSFS_platformReleaseMutex(void *mutex)
{
pthread_mutex_unlock((pthread_mutex_t *) mutex);
} /* __PHYSFS_platformReleaseMutex */
307
308
#endif /* !defined __BEOS__ */
309
/* end of unix.c ... */