Subversion Repositories planix.SVN

/*
 * pANS stdio -- setvbuf
 */
#include "iolib.h"
int setvbuf(FILE *f, char *buf, int mode, long size){
        if(f->state!=OPEN){
                f->state=ERR;
                return -1;
        }
        f->state=RDWR;
        switch(mode){
        case _IOLBF:
                f->flags|=LINEBUF;
        case _IOFBF:
                if(buf==0){
                        buf=malloc(size);
                        if(buf==0){
                                f->state=ERR;
                                return -1;
                        }
                        f->flags|=BALLOC;
                }
                f->bufl=size;
                break;
        case _IONBF:
                buf=f->unbuf;
                f->bufl=0;
                break;
        }
        f->rp=f->wp=f->lp=f->buf=buf;
        f->state=RDWR;
        return 0;
}
int _IO_setvbuf(FILE *f){
        static int isatty(int);
        if(f==stderr || (f==stdout && isatty(1)))
                return setvbuf(f, (char *)0, _IOLBF, BUFSIZ);
        else return setvbuf(f, (char *)0, _IOFBF, BUFSIZ);
}
static int
isatty(int fd)
{
        char buf[64];

        if(fd2path(fd, buf, sizeof buf) != 0)
                return 0;

        /* might be /mnt/term/dev/cons */
        return strlen(buf) >= 9 && strcmp(buf+strlen(buf)-9, "/dev/cons") == 0;
}