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- /*
- * Posix stdio -- fdopen
- */
- #include "iolib.h"
- /*
- * Open the named file with the given mode, using the given FILE
- * Legal modes are given below, `additional characters may follow these sequences':
- * r rb open to read
- * w wb open to write, truncating
- * a ab open to write positioned at eof, creating if non-existant
- * r+ r+b rb+ open to read and write, creating if non-existant
- * w+ w+b wb+ open to read and write, truncating
- * a+ a+b ab+ open to read and write, positioned at eof, creating if non-existant.
- */
- FILE *fdopen(const int fd, const char *mode){
- FILE *f;
- qlock(&_stdiolk);
- for(f=_IO_stream;f!=&_IO_stream[FOPEN_MAX];f++)
- if(f->state==CLOSED)
- break;
- if(f==&_IO_stream[FOPEN_MAX]) {
- qunlock(&_stdiolk);
- return NULL;
- }
- f->fd=fd;
- if(mode[0]=='a')
- seek(f->fd, 0L, 2);
- if(f->fd==-1) return NULL;
- f->flags=0;
- f->state=OPEN;
- f->buf=0;
- f->rp=0;
- f->wp=0;
- f->lp=0;
- qunlock(&_stdiolk);
- return f;
- }
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