jehanne/sys/src/lib/stdio/fgets.c

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/*
* This file is part of the UCB release of Plan 9. It is subject to the license
* terms in the LICENSE file found in the top-level directory of this
* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
* part of the UCB release of Plan 9, including this file, may be copied,
* modified, propagated, or distributed except according to the terms contained
* in the LICENSE file.
*/
/*
* pANS stdio -- fgets
*/
#include "iolib.h"
char *fgets(char *as, int n, FILE *f){
int c;
char *s=as;
c = EOF;
while(n>1 && (c=getc(f))!=EOF){
*s++=c;
--n;
if(c=='\n') break;
}
if(c==EOF && s==as
|| ferror(f)) return NULL;
if(n) *s='\0';
return as;
}