Ignore blanks before the first address and before the command.

2 files changed, 9 insertions, 0 deletions

diff --git a/editors/sed.c b/editors/sed.c
index 7f765842c..fe1c0dbae 100644
--- a/editors/sed.c
+++ b/editors/sed.c
@@ -414,6 +414,10 @@ static char *parse_cmd_str(struct sed_cmd * const sed_cmd, const char *const cmd
          *            part1 part2  part3
          */
 
+        /* skip initial whitespace */
+        while (isspace(cmdstr[idx]))
+                idx++;
+
         /* first part (if present) is an address: either a number or a /regex/ */
         if (isdigit(cmdstr[idx]) || cmdstr[idx] == '/')
                 idx = get_address(sed_cmd, cmdstr, &sed_cmd->beg_line, &sed_cmd->beg_match);
@@ -422,6 +426,10 @@ static char *parse_cmd_str(struct sed_cmd * const sed_cmd, const char *const cmd
         if (cmdstr[idx] == ',')
                 idx += get_address(sed_cmd, &cmdstr[++idx], &sed_cmd->end_line, &sed_cmd->end_match);
 
+        /* skip whitespace before the command */
+        while (isspace(cmdstr[idx]))
+                idx++;
+
         /* last part (mandatory) will be a command */
         if (cmdstr[idx] == '\0')
                 error_msg_and_die("missing command");
diff --git a/testsuite/sed/sed-accepts-blanks-before-command b/testsuite/sed/sed-accepts-blanks-before-command
new file mode 100644
index 000000000..9597c2f8b
--- /dev/null
+++ b/testsuite/sed/sed-accepts-blanks-before-command
@@ -0,0 +1 @@
+busybox sed -e '1 d' </dev/null