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List:       busybox-cvs
Subject:    [git commit] sed: fix append command to match GNU sed 4.2.1
From:       Denys Vlasenko <vda.linux () googlemail ! com>
Date:       2016-05-06 16:25:56
Message-ID: 20160506162641.0EE6E81EE3 () busybox ! osuosl ! org
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commit: https://git.busybox.net/busybox/commit/?id=f2559e5c2b7bd2c5fa0dd8e88d0a931da92a23af
branch: https://git.busybox.net/busybox/commit/?id=refs/heads/master

This closes one testcase failure

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
---
 editors/sed.c       | 29 +++++++++++++++++++----------
 testsuite/sed.tests |  6 ++++--
 2 files changed, 23 insertions(+), 12 deletions(-)

diff --git a/editors/sed.c b/editors/sed.c
index 7f18fd0..f37c37d 100644
--- a/editors/sed.c
+++ b/editors/sed.c
@@ -956,13 +956,22 @@ static void puts_maybe_newline(char *s, FILE *file, char *last_puts_char, char l
 	*last_puts_char = lpc;
 }
 
-static void flush_append(char *last_puts_char, char last_gets_char)
+static void flush_append(char *last_puts_char)
 {
 	char *data;
 
 	/* Output appended lines. */
-	while ((data = (char *)llist_pop(&G.append_head))) {
-		puts_maybe_newline(data, G.nonstdout, last_puts_char, last_gets_char);
+	while ((data = (char *)llist_pop(&G.append_head)) != NULL) {
+		/* Append command does not respect "nonterminated-ness"
+		 * of last line. Try this:
+		 * $ echo -n "woot" | sed -e '/woot/a woo' -
+		 * woot
+		 * woo
+		 * (both lines are terminated with \n)
+		 * Therefore we do not propagate "last_gets_char" here,
+		 * pass '\n' instead:
+		 */
+		puts_maybe_newline(data, G.nonstdout, last_puts_char, '\n');
 		free(data);
 	}
 }
@@ -970,13 +979,13 @@ static void flush_append(char *last_puts_char, char last_gets_char)
 /* Get next line of input from G.input_file_list, flushing append buffer and
  * noting if we ran out of files without a newline on the last line we read.
  */
-static char *get_next_line(char *gets_char, char *last_puts_char, char last_gets_char)
+static char *get_next_line(char *gets_char, char *last_puts_char)
 {
 	char *temp = NULL;
 	int len;
 	char gc;
 
-	flush_append(last_puts_char, last_gets_char);
+	flush_append(last_puts_char);
 
 	/* will be returned if last line in the file
 	 * doesn't end with either '\n' or '\0' */
@@ -1054,7 +1063,7 @@ static void process_files(void)
 	int substituted;
 
 	/* Prime the pump */
-	next_line = get_next_line(&next_gets_char, &last_puts_char, '\n' /*last_gets_char*/);
+	next_line = get_next_line(&next_gets_char, &last_puts_char);
 
 	/* Go through every line in each file */
  again:
@@ -1068,7 +1077,7 @@ static void process_files(void)
 
 	/* Read one line in advance so we can act on the last line,
 	 * the '$' address */
-	next_line = get_next_line(&next_gets_char, &last_puts_char, last_gets_char);
+	next_line = get_next_line(&next_gets_char, &last_puts_char);
 	linenum++;
 
 	/* For every line, go through all the commands */
@@ -1295,7 +1304,7 @@ static void process_files(void)
 				free(pattern_space);
 				pattern_space = next_line;
 				last_gets_char = next_gets_char;
-				next_line = get_next_line(&next_gets_char, &last_puts_char, last_gets_char);
+				next_line = get_next_line(&next_gets_char, &last_puts_char);
 				substituted = 0;
 				linenum++;
 				break;
@@ -1331,7 +1340,7 @@ static void process_files(void)
 			pattern_space[len] = '\n';
 			strcpy(pattern_space + len+1, next_line);
 			last_gets_char = next_gets_char;
-			next_line = get_next_line(&next_gets_char, &last_puts_char, last_gets_char);
+			next_line = get_next_line(&next_gets_char, &last_puts_char);
 			linenum++;
 			break;
 		}
@@ -1435,7 +1444,7 @@ static void process_files(void)
 
 	/* Delete and such jump here. */
  discard_line:
-	flush_append(&last_puts_char, last_gets_char);
+	flush_append(&last_puts_char /*,last_gets_char*/);
 	free(pattern_space);
 
 	goto again;
diff --git a/testsuite/sed.tests b/testsuite/sed.tests
index c4b6fa2..a71f8b1 100755
--- a/testsuite/sed.tests
+++ b/testsuite/sed.tests
@@ -135,10 +135,12 @@ testing "sed empty file plus cat" "sed -e 's/nohit//' input -" "one\ntwo" \
 	"" "one\ntwo"
 testing "sed cat plus empty file" "sed -e 's/nohit//' input -" "one\ntwo" \
 	"one\ntwo" ""
-test x"$SKIP_KNOWN_BUGS" = x"" && {
 testing "sed append autoinserts newline" "sed -e '/woot/a woo' -" \
 	"woot\nwoo\n" "" "woot"
-}
+testing "sed append autoinserts newline 2" "sed -e '/oot/a woo' - input" \
+	"woot\nwoo\nboot\nwoo\n" "boot" "woot"
+testing "sed append autoinserts newline 3" "sed -e '/oot/a woo' -i input && cat input" \
+	"boot\nwoo\n" "boot" ""
 testing "sed insert doesn't autoinsert newline" "sed -e '/woot/i woo' -" \
 	"woo\nwoot" "" "woot"
 testing "sed print autoinsert newlines" "sed -e 'p' -" "one\none" "" "one"
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