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- /*
- * fdopen - convert a (UNIX) file descriptor into a FILE pointer
- */
- /* $Id$ */
- #include <stdio.h>
- #include <stdlib.h>
- #include "../stdio/loc_incl.h"
- FILE *
- fdopen(int fd, const char *mode)
- {
- register int i;
- FILE *stream;
- int flags = 0;
- if (fd < 0) return (FILE *)NULL;
- for (i = 0; __iotab[i] != 0 ; i++)
- if (i >= FOPEN_MAX-1)
- return (FILE *)NULL;
- switch(*mode++) {
- case 'r':
- flags |= _IOREAD | _IOREADING;
- break;
- case 'a':
- flags |= _IOAPPEND;
- case 'w':
- flags |= _IOWRITE | _IOWRITING;
- break;
- default:
- return (FILE *)NULL;
- }
- while(*mode) {
- switch(*mode++) {
- case 'b':
- continue;
- case '+':
- flags |= _IOREAD | _IOWRITE;
- continue;
- /* The sequence may be followed by aditional characters */
- default:
- break;
- }
- break;
- }
- if ((stream = (FILE *) malloc(sizeof(FILE))) == NULL) {
- return (FILE *)NULL;
- }
- if ((flags & _IOREAD) && (flags & _IOWRITE))
- flags &= ~(_IOREADING | _IOWRITING);
- stream->_count = 0;
- stream->_fd = fd;
- stream->_flags = flags;
- stream->_buf = NULL;
- __iotab[i] = stream;
- return stream;
- }
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