1 files changed, 110 insertions, 0 deletions
diff --git a/contrib/sendmail/libsm/fget.c b/contrib/sendmail/libsm/fget.c
new file mode 100644
index 0000000..611748c
--- /dev/null
+++ b/contrib/sendmail/libsm/fget.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
+ *      All rights reserved.
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Chris Torek.
+ *
+ * By using this file, you agree to the terms and conditions set
+ * forth in the LICENSE file which can be found at the top level of
+ * the sendmail distribution.
+ */
+
+#include <sm/gen.h>
+SM_RCSID("@(#)$Id: fget.c,v 1.24 2001/09/11 04:04:48 gshapiro Exp $")
+#include <stdlib.h>
+#include <string.h>
+#include <sm/io.h>
+#include <sm/assert.h>
+#include "local.h"
+
+/*
+**  SM_IO_FGETS -- get a string from a file
+**
+**  Read at most n-1 characters from the given file.
+**  Stop when a newline has been read, or the count ('n') runs out.
+**
+**	Parameters:
+**		fp -- the file to read from
+**		timeout -- time to complete reading the string in milliseconds
+**		buf -- buffer to place read string in
+**		n -- size of 'buf'
+**
+**	Returns:
+**		success: returns value of 'buf'
+**		failure: NULL (no characters were read)
+**		timeout: NULL and errno set to EAGAIN
+**
+**	Side Effects:
+**		may move the file pointer
+*/
+
+char *
+sm_io_fgets(fp, timeout, buf, n)
+	register SM_FILE_T *fp;
+	int timeout;
+	char *buf;
+	register int n;
+{
+	register int len;
+	register char *s;
+	register unsigned char *p, *t;
+
+	SM_REQUIRE_ISA(fp, SmFileMagic);
+	if (n <= 0)		/* sanity check */
+		return NULL;
+
+	s = buf;
+	n--;			/* leave space for NUL */
+	while (n > 0)
+	{
+		/* If the buffer is empty, refill it. */
+		if ((len = fp->f_r) <= 0)
+		{
+
+			/*
+			**  Timeout is only passed if we can't get the data
+			**  from the buffer (which is counted as immediately).
+			*/
+
+			if (sm_refill(fp, timeout) != 0)
+			{
+				/* EOF/error: stop with partial or no line */
+				if (s == buf)
+					return NULL;
+				break;
+			}
+			len = fp->f_r;
+		}
+		p = fp->f_p;
+
+		/*
+		**  Scan through at most n bytes of the current buffer,
+		**  looking for '\n'.  If found, copy up to and including
+		**  newline, and stop.  Otherwise, copy entire chunk
+		**  and loop.
+		*/
+
+		if (len > n)
+			len = n;
+		t = (unsigned char *) memchr((void *) p, '\n', len);
+		if (t != NULL)
+		{
+			len = ++t - p;
+			fp->f_r -= len;
+			fp->f_p = t;
+			(void) memcpy((void *) s, (void *) p, len);
+			s[len] = 0;
+			return buf;
+		}
+		fp->f_r -= len;
+		fp->f_p += len;
+		(void) memcpy((void *) s, (void *) p, len);
+		s += len;
+		n -= len;
+	}
+	*s = 0;
+	return buf;
+}