svn commit: r308314 - head/usr.bin/sed

[Pedro F. Giffuni]

Author: pfg
Date: Fri Nov  4 20:49:59 2016
New Revision: 308314
URL: https://svnweb.freebsd.org/changeset/base/308314

Log:
  sed(1): add LEGACY_BSDSED_COMPAT compile-time flag.
  
  In r297602, which included a __FreeBSD_version bump to 1100105, we changed
  sed 'i' and 'a' from discarding whitespaces to conform with what GNU and
  sysvish sed do.
  
  There are arguments in favor of keeping the old behavior but the new
  behavior is also useful for migration purposes. It seems important to at
  least consider the case of developers depending on the previous behavior,
  so add a CFLAG to enable the old behaviour.
  
  PR:		213474
  MFC after:	5 days

Modified:
  head/usr.bin/sed/compile.c

Modified: head/usr.bin/sed/compile.c
==============================================================================
--- head/usr.bin/sed/compile.c	Fri Nov  4 20:38:26 2016	(r308313)
+++ head/usr.bin/sed/compile.c	Fri Nov  4 20:49:59 2016	(r308314)
@@ -746,6 +746,9 @@ compile_text(void)
 	while (cu_fgets(lbuf, sizeof(lbuf), NULL) != NULL) {
 		op = s = text + size;
 		p = lbuf;
+#ifdef LEGACY_BSDSED_COMPAT
+		EATSPACE();
+#endif
 		for (esc_nl = 0; *p != '\0'; p++) {
 			if (*p == '\\' && p[1] != '\0' && *++p == '\n')
 				esc_nl = 1;