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32 * @(#)fgets.c 8.2 (Berkeley) 12/22/93
33 * $FreeBSD: src/lib/libc/stdio/fgets.c,v 1.14 2007/01/09 00:28:06 imp Exp $
36 #include "namespace.h"
39 #include "un-namespace.h"
41 #include "libc_private.h"
44 * Read at most n-1 characters from the given file.
45 * Stop when a newline has been read, or the count runs out.
46 * Return first argument, or NULL if no characters were read.
49 fgets(char *buf
, int n
, FILE *fp
)
55 if (n
<= 0) /* sanity check */
61 n
--; /* leave space for NUL */
64 * If the buffer is empty, refill it.
66 if ((len
= fp
->pub
._r
) <= 0) {
68 /* EOF/error: stop with partial or no line */
80 * Scan through at most n bytes of the current buffer,
81 * looking for '\n'. If found, copy up to and including
82 * newline, and stop. Otherwise, copy entire chunk
87 t
= memchr((void *)p
, '\n', len
);
92 memcpy((void *)s
, (void *)p
, len
);
99 memcpy((void *)s
, (void *)p
, len
);