From e5888a1ffdae813d7575f5fb02275c6bb07e5199 Mon Sep 17 00:00:00 2001 From: Taru Karttunen Date: Wed, 30 Mar 2011 15:46:40 +0300 Subject: Import sources from 2011-03-30 iso image --- sys/src/libstdio/setvbuf.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100755 sys/src/libstdio/setvbuf.c (limited to 'sys/src/libstdio/setvbuf.c') diff --git a/sys/src/libstdio/setvbuf.c b/sys/src/libstdio/setvbuf.c new file mode 100755 index 000000000..34c3bf7c8 --- /dev/null +++ b/sys/src/libstdio/setvbuf.c @@ -0,0 +1,50 @@ +/* + * 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; +} -- cgit v1.2.3