From cec674795b1eb2cb7467c6031e67b2d3611ded9d Mon Sep 17 00:00:00 2001
From: sunil <sunil@openbsd.org>
Date: Sun, 11 Oct 2015 12:09:06 +0000
Subject: [PATCH] Convert some fgetln to getline.

Suggestion and ok millert@, ok gilles@, eric@
---
 usr.sbin/smtpd/mda.c | 55 ++++++++++++++++----------------------------
 1 file changed, 20 insertions(+), 35 deletions(-)

diff --git a/usr.sbin/smtpd/mda.c b/usr.sbin/smtpd/mda.c
index 91d6968ab67..0ea145f087d 100644
--- a/usr.sbin/smtpd/mda.c
+++ b/usr.sbin/smtpd/mda.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: mda.c,v 1.109 2015/01/20 17:37:54 deraadt Exp $	*/
+/*	$OpenBSD: mda.c,v 1.110 2015/10/11 12:09:06 sunil Exp $	*/
 
 /*
  * Copyright (c) 2008 Gilles Chehade <gilles@poolp.org>
@@ -470,8 +470,9 @@ static void
 mda_io(struct io *io, int evt)
 {
 	struct mda_session	*s = io->arg;
-	char			*ln;
-	size_t			 len;
+	char			*ln = NULL;
+	size_t			 sz = 0;
+	ssize_t			 len;
 
 	log_trace(TRACE_IO, "mda: %p: %s %s", s, io_strevent(evt),
 	    io_strio(io));
@@ -490,7 +491,7 @@ mda_io(struct io *io, int evt)
 		}
 
 		while (iobuf_queued(&s->iobuf) < MDA_HIWAT) {
-			if ((ln = fgetln(s->datafp, &len)) == NULL)
+			if ((len = getline(&ln, &sz, s->datafp)) == -1)
 				break;
 			if (iobuf_queue(&s->iobuf, ln, len) == -1) {
 				m_create(p_parent, IMSG_MDA_KILL,
@@ -499,6 +500,7 @@ mda_io(struct io *io, int evt)
 				m_add_string(p_parent, "Out of memory");
 				m_close(p_parent);
 				io_pause(io, IO_PAUSE_OUT);
+				free(ln);
 				return;
 			}
 #if 0
@@ -508,6 +510,7 @@ mda_io(struct io *io, int evt)
 #endif
 		}
 
+		free(ln);
 		if (ferror(s->datafp)) {
 			log_debug("debug: mda: ferror on session %016"PRIx64,
 			    s->id);
@@ -558,21 +561,14 @@ mda_io(struct io *io, int evt)
 static int
 mda_check_loop(FILE *fp, struct mda_envelope *e)
 {
-	char		*buf, *lbuf;
-	size_t		 len;
+	char		*buf = NULL;
+	size_t		 sz = 0;
+	ssize_t		 len;
 	int		 ret = 0;
 
-	lbuf = NULL;
-	while ((buf = fgetln(fp, &len))) {
+	while ((len = getline(&buf, &sz, fp)) != -1) {
 		if (buf[len - 1] == '\n')
 			buf[len - 1] = '\0';
-		else {
-			/* EOF without EOL, copy and add the NUL */
-			lbuf = xmalloc(len + 1, "mda_check_loop");
-			memcpy(lbuf, buf, len);
-			lbuf[len] = '\0';
-			buf = lbuf;
-		}
 
 		if (strchr(buf, ':') == NULL && !isspace((unsigned char)*buf))
 			break;
@@ -583,16 +579,10 @@ mda_check_loop(FILE *fp, struct mda_envelope *e)
 				break;
 			}
 		}
-		if (lbuf) {
-			free(lbuf);
-			lbuf = NULL;
-		}
 	}
-	if (lbuf)
-		free(lbuf);
 
+	free(buf);
 	fseek(fp, SEEK_SET, 0);
-
 	return (ret);
 }
 
@@ -600,10 +590,10 @@ static int
 mda_getlastline(int fd, char *dst, size_t dstsz)
 {
 	FILE	*fp;
-	char	*ln, buf[LINE_MAX];
-	size_t	 len;
+	char	*ln = NULL;
+	size_t	 sz = 0;
+	ssize_t	 len;
 
-	memset(buf, 0, sizeof buf);
 	if (lseek(fd, 0, SEEK_SET) < 0) {
 		log_warn("warn: mda: lseek");
 		close(fd);
@@ -615,24 +605,19 @@ mda_getlastline(int fd, char *dst, size_t dstsz)
 		close(fd);
 		return (-1);
 	}
-	while ((ln = fgetln(fp, &len))) {
+	while ((len = getline(&ln, &sz, fp)) != -1) {
 		if (ln[len - 1] == '\n')
-			len--;
-		if (len == 0)
-			continue;
-		if (len >= sizeof buf)
-			len = (sizeof buf) - 1;
-		memmove(buf, ln, len);
-		buf[len] = '\0';
+			ln[len - 1] = '\0';
 	}
 	fclose(fp);
 
-	if (buf[0]) {
+	if (sz != 0) {
 		(void)strlcpy(dst, "\"", dstsz);
-		(void)strnvis(dst + 1, buf, dstsz - 2, VIS_SAFE | VIS_CSTYLE);
+		(void)strnvis(dst + 1, ln, dstsz - 2, VIS_SAFE | VIS_CSTYLE);
 		(void)strlcat(dst, "\"", dstsz);
 	}
 
+	free(ln);
 	return (0);
 }
 
-- 
2.20.1