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40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/*
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* Copyright 1987, 1988 by the Massachusetts Institute of Technology.
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* For copying and distribution information, please see the file
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* <Copyright.MIT>.
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*
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* from: fgetst.c,v 4.0 89/01/23 10:08:31 jtkohl Exp $
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* $Id: fgetst.c,v 1.1.1.1 1994/09/30 14:49:59 csgr Exp $
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*/
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#ifndef lint
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static char rcsid[] =
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"$Id: fgetst.c,v 1.1.1.1 1994/09/30 14:49:59 csgr Exp $";
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#endif /* lint */
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#include <stdio.h>
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/*
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* fgetst takes a file descriptor, a character pointer, and a count.
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* It reads from the file it has either read "count" characters, or
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* until it reads a null byte. When finished, what has been read exists
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* in "s". If "count" characters were actually read, the last is changed
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* to a null, so the returned string is always null-terminated. fgetst
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* returns the number of characters read, including the null terminator.
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*/
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fgetst(f, s, n)
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FILE *f;
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register char *s;
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int n;
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{
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register count = n;
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int ch; /* NOT char; otherwise you don't see EOF */
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while ((ch = getc(f)) != EOF && ch && --count) {
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*s++ = ch;
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}
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*s = '\0';
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return (n - count);
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}
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