ref: 5c448c618a89ab8933838da1b5b97ed7c4a42e08
dir: /sys/src/ape/lib/ap/stdio/fdopen.c/
/* * Posix stdio -- fdopen */ #include "iolib.h" #include <errno.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; if(fd < 0){ errno = EBADF; return NULL; } if((f = _IO_newfile()) == NULL) return NULL; f->fd=fd; if(mode[0]=='a') lseek(f->fd, 0L, 2); f->flags=0; f->state=OPEN; f->buf=0; f->rp=0; f->wp=0; f->lp=0; return f; }