1 /* Copyright (C) 2004 Manuel Novoa III <mjn3@codepoet.org>
3 * GNU Library General Public License (LGPL) version 2 or later.
5 * Dedicated to Toni. See uClibc/DEDICATION.mjn3 for details.
10 libc_hidden_proto(isatty)
11 /* libc_hidden_proto(open) */
12 /* libc_hidden_proto(fcntl) */
16 * fopen64 : filename != NULL, stream == NULL, filedes == -2
17 * fopen : filename != NULL, stream == NULL, filedes == -1
18 * freopen : filename != NULL, stream != NULL, filedes == -1
19 * fdopen : filename == NULL, stream == NULL, filedes valid
21 * fsfopen : filename != NULL, stream != NULL, filedes == -1
24 #if (O_ACCMODE != 3) || (O_RDONLY != 0) || (O_WRONLY != 1) || (O_RDWR != 2)
25 #error Assumption violated - mode constants
32 /* Internal function -- reentrant (locks open file list) */
34 FILE attribute_hidden *_stdio_fopen(intptr_t fname_or_mode,
35 register const char * __restrict mode,
36 register FILE * __restrict stream, int filedes)
41 /* Parse the specified mode. */
43 if (*mode != 'r') { /* Not read... */
44 open_mode = (O_WRONLY | O_CREAT | O_TRUNC);
45 if (*mode != 'w') { /* Not write (create or truncate)... */
46 open_mode = (O_WRONLY | O_CREAT | O_APPEND);
47 if (*mode != 'a') { /* Not write (create or append)... */
49 __set_errno(EINVAL); /* So illegal mode. */
52 assert(!(stream->__modeflags & __FLAG_FREEBUF));
53 __STDIO_STREAM_FREE_FILE(stream);
60 if ((mode[1] == 'b')) { /* Binary mode (NO-OP currently). */
64 if (mode[1] == '+') { /* Read and Write. */
66 open_mode |= (O_RDONLY | O_WRONLY);
67 open_mode += (O_RDWR - (O_RDONLY | O_WRONLY));
70 #ifdef __UCLIBC_MJN3_ONLY__
71 #warning CONSIDER: Implement glibc ccs option to bind a codeset?
72 #warning CONSIDER: Implement glibc mmap option for readonly files?
73 #warning CONSIDER: Implement a text mode using custom read/write funcs?
75 #if defined(__UCLIBC_HAS_FOPEN_EXCLUSIVE_MODE__) || defined(__UCLIBC_HAS_FOPEN_LARGEFILE_MODE__)
78 # ifdef __UCLIBC_HAS_FOPEN_EXCLUSIVE_MODE__
79 if (*mode == 'x') { /* Open exclusive (a glibc extension). */
84 # ifdef __UCLIBC_HAS_FOPEN_LARGEFILE_MODE__
85 if (*mode == 'F') { /* Open as large file (uClibc extension). */
86 open_mode |= O_LARGEFILE;
94 if (!stream) { /* Need to allocate a FILE (not freopen). */
95 if ((stream = malloc(sizeof(FILE))) == NULL) {
98 stream->__modeflags = __FLAG_FREEFILE;
99 #ifdef __STDIO_BUFFERS
100 stream->__bufstart = NULL; /* We allocate a buffer below. */
102 #ifdef __UCLIBC_HAS_THREADS__
103 /* We only initialize the mutex in the non-freopen case. */
104 /* stream->__user_locking = _stdio_user_locking; */
105 __stdio_init_mutex(&stream->__lock);
109 #ifdef __UCLIBC_MJN3_ONLY__
110 #warning TODO: Verify fdopen append behavior of glibc.
113 if (filedes >= 0) { /* Handle fdopen trickery. */
114 stream->__filedes = filedes;
115 /* NOTE: it is insufficient to just check R/W/RW agreement.
116 * We must also check largefile compatibility if applicable.
117 * Also, if append mode is desired for fdopen but O_APPEND isn't
118 * currently set, then set it as recommended by SUSv3. However,
119 * if append mode is not specified for fdopen but O_APPEND is set,
120 * leave it set (glibc compat). */
121 i = (open_mode & (O_ACCMODE|O_LARGEFILE)) + 1;
123 /* NOTE: fopencookie needs changing if the basic check changes! */
124 if (((i & (((int) fname_or_mode) + 1)) != i) /* Basic agreement? */
125 || (((open_mode & ~((__mode_t) fname_or_mode)) & O_APPEND)
126 && fcntl(filedes, F_SETFL, O_APPEND)) /* Need O_APPEND. */
130 /* For later... to reflect largefile setting in stream flags. */
131 __STDIO_WHEN_LFS( open_mode |= (((__mode_t) fname_or_mode)
134 __STDIO_WHEN_LFS( if (filedes < -1) open_mode |= O_LARGEFILE );
135 if ((stream->__filedes = open(((const char *) fname_or_mode),
136 open_mode, 0666)) < 0) {
141 stream->__modeflags &= __FLAG_FREEFILE;
142 /* stream->__modeflags &= ~(__FLAG_READONLY|__FLAG_WRITEONLY); */
144 stream->__modeflags |= /* Note: Makes assumptions about flag vals! */
145 #if (O_APPEND != __FLAG_APPEND) || ((O_LARGEFILE != __FLAG_LARGEFILE) && (O_LARGEFILE != 0))
146 # if (O_APPEND != __FLAG_APPEND)
147 ((open_mode & O_APPEND) ? __FLAG_APPEND : 0) |
149 (open_mode & O_APPEND) |
151 # if (O_LARGEFILE != __FLAG_LARGEFILE) && (O_LARGEFILE != 0)
152 ((open_mode & O_LARGEFILE) ? __FLAG_LARGEFILE : 0) |
154 (open_mode & O_LARGEFILE) |
157 (open_mode & (O_APPEND|O_LARGEFILE)) | /* i386 linux and elks */
159 ((((open_mode & O_ACCMODE) + 1) ^ 0x03) * __FLAG_WRITEONLY);
161 #ifdef __STDIO_BUFFERS
162 i = errno; /* Preserve errno against isatty call. */
163 stream->__modeflags |= (isatty(stream->__filedes) * __FLAG_LBF);
166 if (!stream->__bufstart) {
167 if ((stream->__bufstart = malloc(BUFSIZ)) != NULL) {
168 stream->__bufend = stream->__bufstart + BUFSIZ;
169 stream->__modeflags |= __FLAG_FREEBUF;
171 # if __STDIO_BUILTIN_BUF_SIZE > 0
172 stream->__bufstart = stream->__builtinbuf;
173 stream->__bufend = stream->__builtinbuf + sizeof(stream->__builtinbuf);
174 # else /* __STDIO_BUILTIN_BUF_SIZE > 0 */
175 stream->__bufend = stream->__bufstart;
176 # endif /* __STDIO_BUILTIN_BUF_SIZE > 0 */
180 __STDIO_STREAM_DISABLE_GETC(stream);
181 __STDIO_STREAM_DISABLE_PUTC(stream);
182 __STDIO_STREAM_INIT_BUFREAD_BUFPOS(stream);
185 __STDIO_STREAM_RESET_GCS(stream);
187 #ifdef __UCLIBC_HAS_WCHAR__
188 stream->__ungot_width[0] = 0;
190 #ifdef __STDIO_MBSTATE
191 __INIT_MBSTATE(&(stream->__state));
194 #ifdef __UCLIBC_HAS_THREADS__
195 /* Even in the freopen case, we reset the user locking flag. */
196 stream->__user_locking = _stdio_user_locking;
197 /* __stdio_init_mutex(&stream->__lock); */
200 #ifdef __STDIO_HAS_OPENLIST
201 #if defined(__UCLIBC_HAS_THREADS__) && defined(__STDIO_BUFFERS)
202 if (!(stream->__modeflags & __FLAG_FREEFILE))
204 /* An freopen call so the file was never removed from the list. */
209 /* We have to lock the del mutex in case another thread wants to fclose()
211 __STDIO_THREADLOCK_OPENLIST_DEL;
212 __STDIO_THREADLOCK_OPENLIST_ADD;
213 stream->__nextopen = _stdio_openlist; /* New files are inserted at */
214 _stdio_openlist = stream; /* the head of the list. */
215 __STDIO_THREADUNLOCK_OPENLIST_ADD;
216 __STDIO_THREADUNLOCK_OPENLIST_DEL;
220 __STDIO_STREAM_VALIDATE(stream);