1 /*
2 * UAE - The Un*x Amiga Emulator
3 *
4 * Library of functions to make emulated filesystem as independent as
5 * possible of the host filesystem's capabilities.
6 * This is the Unix version.
7 *
8 * Copyright 1999 Bernd Schmidt
9 */
10
11 #include "sysconfig.h"
12 #include "sysdeps.h"
13
14 #include "fsdb.h"
15
16 /* Return nonzero for any name we can't create on the native filesystem. */
fsdb_name_invalid(const char * n)17 int fsdb_name_invalid (const char *n)
18 {
19 if (strcmp (n, FSDB_FILE) == 0)
20 return 1;
21 if (n[0] != '.')
22 return 0;
23 if (n[1] == '\0')
24 return 1;
25 return n[1] == '.' && n[2] == '\0';
26 }
27
28 /* For an a_inode we have newly created based on a filename we found on the
29 * native fs, fill in information about this file/directory. */
fsdb_fill_file_attrs(a_inode * aino)30 void fsdb_fill_file_attrs (a_inode *aino)
31 {
32 struct stat statbuf;
33 /* This really shouldn't happen... */
34 if (stat (aino->nname, &statbuf) == -1)
35 return;
36 aino->dir = S_ISDIR (statbuf.st_mode) ? 1 : 0;
37 aino->amigaos_mode = ((S_IXUSR & statbuf.st_mode ? 0 : A_FIBF_EXECUTE)
38 | (S_IWUSR & statbuf.st_mode ? 0 : A_FIBF_WRITE)
39 | (S_IRUSR & statbuf.st_mode ? 0 : A_FIBF_READ));
40 }
41
fsdb_set_file_attrs(a_inode * aino,int mask)42 int fsdb_set_file_attrs (a_inode *aino, int mask)
43 {
44 struct stat statbuf;
45 int mode;
46
47 if (stat (aino->nname, &statbuf) == -1)
48 return ERROR_OBJECT_NOT_AROUND;
49
50 mode = statbuf.st_mode;
51 /* Unix dirs behave differently than AmigaOS ones. */
52 if (! aino->dir) {
53 if (mask & A_FIBF_READ)
54 mode &= ~S_IRUSR;
55 else
56 mode |= S_IRUSR;
57
58 if (mask & A_FIBF_WRITE)
59 mode &= ~S_IWUSR;
60 else
61 mode |= S_IWUSR;
62
63 if (mask & A_FIBF_EXECUTE)
64 mode &= ~S_IXUSR;
65 else
66 mode |= S_IXUSR;
67
68 chmod (aino->nname, mode);
69 }
70
71 aino->amigaos_mode = mask;
72 aino->dirty = 1;
73 return 0;
74 }
75
76 /* Return nonzero if we can represent the amigaos_mode of AINO within the
77 * native FS. Return zero if that is not possible. */
fsdb_mode_representable_p(const a_inode * aino)78 int fsdb_mode_representable_p (const a_inode *aino)
79 {
80 if (aino->dir)
81 return aino->amigaos_mode == 0;
82 return (aino->amigaos_mode & (A_FIBF_DELETE | A_FIBF_SCRIPT | A_FIBF_PURE)) == 0;
83 }
84
fsdb_create_unique_nname(a_inode * base,const char * suggestion)85 char *fsdb_create_unique_nname (a_inode *base, const char *suggestion)
86 {
87 char tmp[256] = "__uae___";
88 strncat (tmp, suggestion, 240);
89 for (;;) {
90 int i;
91 char *p = build_nname (base->nname, tmp);
92 if (access (p, R_OK) < 0 && errno == ENOENT) {
93 printf ("unique name: %s\n", p);
94 return p;
95 }
96 free (p);
97
98 /* tmpnam isn't reentrant and I don't really want to hack configure
99 * right now to see whether tmpnam_r is available... */
100 for (i = 0; i < 8; i++) {
101 tmp[i] = "_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"[random () % 63];
102 }
103 }
104 }
105