This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
[inseparable changes from patch from perl5.003_12 to perl5.003_13]
[perl5.git] / ext / Fcntl / Fcntl.xs
1 #include "EXTERN.h"
2 #include "perl.h"
3 #include "XSUB.h"
4
5 #ifdef VMS
6 #  include <file.h>
7 #else
8 #  include <fcntl.h>
9 #endif
10
11 /* This comment is a kludge to get metaconfig to see the symbols
12     VAL_O_NONBLOCK
13     VAL_EAGAIN
14     RD_NODATA
15     EOF_NONBLOCK
16    and include the appropriate metaconfig unit
17    so that Configure will test how to turn on non-blocking I/O
18    for a file descriptor.  See config.h for how to use these
19    in your extension. 
20    
21    While I'm at it, I'll have metaconfig look for HAS_POLL too.
22    --AD  October 16, 1995
23 */
24
25 static int
26 not_here(s)
27 char *s;
28 {
29     croak("%s not implemented on this architecture", s);
30     return -1;
31 }
32
33 static double
34 constant(name, arg)
35 char *name;
36 int arg;
37 {
38     errno = 0;
39     switch (*name) {
40     case 'F':
41         if (strnEQ(name, "F_", 2)) {
42             if (strEQ(name, "F_DUPFD"))
43 #ifdef F_DUPFD
44                 return F_DUPFD;
45 #else
46                 goto not_there;
47 #endif
48             if (strEQ(name, "F_GETFD"))
49 #ifdef F_GETFD
50                 return F_GETFD;
51 #else
52                 goto not_there;
53 #endif
54             if (strEQ(name, "F_GETLK"))
55 #ifdef F_GETLK
56                 return F_GETLK;
57 #else
58                 goto not_there;
59 #endif
60             if (strEQ(name, "F_SETFD"))
61 #ifdef F_SETFD
62                 return F_SETFD;
63 #else
64                 goto not_there;
65 #endif
66             if (strEQ(name, "F_GETFL"))
67 #ifdef F_GETFL
68                 return F_GETFL;
69 #else
70                 goto not_there;
71 #endif
72             if (strEQ(name, "F_SETFL"))
73 #ifdef F_SETFL
74                 return F_SETFL;
75 #else
76                 goto not_there;
77 #endif
78             if (strEQ(name, "F_SETLK"))
79 #ifdef F_SETLK
80                 return F_SETLK;
81 #else
82                 goto not_there;
83 #endif
84             if (strEQ(name, "F_SETLKW"))
85 #ifdef F_SETLKW
86                 return F_SETLKW;
87 #else
88                 goto not_there;
89 #endif
90             if (strEQ(name, "F_RDLCK"))
91 #ifdef F_RDLCK
92                 return F_RDLCK;
93 #else
94                 goto not_there;
95 #endif
96             if (strEQ(name, "F_UNLCK"))
97 #ifdef F_UNLCK
98                 return F_UNLCK;
99 #else
100                 goto not_there;
101 #endif
102             if (strEQ(name, "F_WRLCK"))
103 #ifdef F_WRLCK
104                 return F_WRLCK;
105 #else
106                 goto not_there;
107 #endif
108             errno = EINVAL;
109             return 0;
110         } else
111           if (strEQ(name, "FD_CLOEXEC"))
112 #ifdef FD_CLOEXEC
113             return FD_CLOEXEC;
114 #else
115             goto not_there;
116 #endif
117         break;
118     case 'L':
119         if (strnEQ(name, "LOCK_", 5)) {
120             /* We support flock() on systems which don't have it, so
121                always supply the constants. */
122             if (strEQ(name, "LOCK_SH"))
123 #ifdef LOCK_SH
124                 return LOCK_SH;
125 #else
126                 return 1;
127 #endif
128             if (strEQ(name, "LOCK_EX"))
129 #ifdef LOCK_EX
130                 return LOCK_EX;
131 #else
132                 return 2;
133 #endif
134             if (strEQ(name, "LOCK_NB"))
135 #ifdef LOCK_NB
136                 return LOCK_NB;
137 #else
138                 return 4;
139 #endif
140             if (strEQ(name, "LOCK_UN"))
141 #ifdef LOCK_UN
142                 return LOCK_UN;
143 #else
144                 return 8;
145 #endif
146         } else
147           goto not_there;
148         break;
149     case 'O':
150         if (strnEQ(name, "O_", 2)) {
151             if (strEQ(name, "O_CREAT"))
152 #ifdef O_CREAT
153                 return O_CREAT;
154 #else
155                 goto not_there;
156 #endif
157             if (strEQ(name, "O_EXCL"))
158 #ifdef O_EXCL
159                 return O_EXCL;
160 #else
161                 goto not_there;
162 #endif
163             if (strEQ(name, "O_NOCTTY"))
164 #ifdef O_NOCTTY
165                 return O_NOCTTY;
166 #else
167                 goto not_there;
168 #endif
169             if (strEQ(name, "O_TRUNC"))
170 #ifdef O_TRUNC
171                 return O_TRUNC;
172 #else
173                 goto not_there;
174 #endif
175             if (strEQ(name, "O_APPEND"))
176 #ifdef O_APPEND
177                 return O_APPEND;
178 #else
179                 goto not_there;
180 #endif
181             if (strEQ(name, "O_NONBLOCK"))
182 #ifdef O_NONBLOCK
183                 return O_NONBLOCK;
184 #else
185                 goto not_there;
186 #endif
187             if (strEQ(name, "O_NDELAY"))
188 #ifdef O_NDELAY
189                 return O_NDELAY;
190 #else
191                 goto not_there;
192 #endif
193             if (strEQ(name, "O_RDONLY"))
194 #ifdef O_RDONLY
195                 return O_RDONLY;
196 #else
197                 goto not_there;
198 #endif
199             if (strEQ(name, "O_RDWR"))
200 #ifdef O_RDWR
201                 return O_RDWR;
202 #else
203                 goto not_there;
204 #endif
205             if (strEQ(name, "O_WRONLY"))
206 #ifdef O_WRONLY
207                 return O_WRONLY;
208 #else
209                 goto not_there;
210 #endif
211             if (strEQ(name, "O_BINARY"))
212 #ifdef O_BINARY
213                 return O_BINARY;
214 #else
215                 goto not_there;
216 #endif
217         } else
218           goto not_there;
219         break;
220     }
221     errno = EINVAL;
222     return 0;
223
224 not_there:
225     errno = ENOENT;
226     return 0;
227 }
228
229
230 MODULE = Fcntl          PACKAGE = Fcntl
231
232 double
233 constant(name,arg)
234         char *          name
235         int             arg
236