A test and fix for the sed 'n' command

diff --git a/editors/sed.c b/editors/sed.c
index 00ed208..8c77a0f 100644 (file)
--- a/editors/sed.c
+++ b/editors/sed.c
@@ -985,11 +985,19 @@ static void process_file(FILE * file)
                                        next_line = NULL;
                                        break;
                                case 'n':       /* Read next line from input */
+                                       if (!be_quiet) {
+                                               puts(pattern_space);
+                                       }
                                        if (next_line) {
                                                free(pattern_space);
                                                pattern_space = next_line;
                                                next_line = bb_get_chomped_line_from_file(file);
                                                linenum++;
+                                       } else {
+                                               /* Jump to end of script and exist */
+                                               deleted = 1;
+                                               free(next_line);
+                                               next_line = NULL;
                                        }
                                        break;
                                case 'N':       /* Append the next line to the current line */

diff --git a/testsuite/sed/sed-next-line b/testsuite/sed/sed-next-line
new file mode 100644 (file)
index 0000000..38fe20c
--- /dev/null
+++ b/testsuite/sed/sed-next-line
@@ -0,0 +1,12 @@
+busybox sed 'n;p'>output <<EOF
+a
+b
+c
+EOF
+cmp -s output - <<EOF
+a
+b
+b
+c
+c
+EOF