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authorDenys Vlasenko <vda.linux@googlemail.com>2017-07-16 20:29:35 +0200
committerDenys Vlasenko <vda.linux@googlemail.com>2017-07-16 20:29:35 +0200
commitb24e55da84093dd6bf6dff79627e32459c3da071 (patch)
treece5f991b536aaac74a8f9cde431e0336eab4fced
parentc49638b7d29e1010bfa95acbd013bf3268810bae (diff)
downloadbusybox-b24e55da84093dd6bf6dff79627e32459c3da071.tar.gz
hush: fix "cmd1 && cmd2 &" handling on NOMMU
function old new delta done_pipe 234 238 +4 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--shell/hush.c22
1 files changed, 13 insertions, 9 deletions
diff --git a/shell/hush.c b/shell/hush.c
index 2a734f3de..8d9292ed1 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -3378,18 +3378,15 @@ static void done_pipe(struct parse_context *ctx, pipe_style type)
ctx->ctx_inverted = 0;
ctx->pipe->res_word = ctx->ctx_res_w;
#endif
- if (type != PIPE_BG || ctx->list_head == ctx->pipe) {
- no_conv:
- ctx->pipe->followup = type;
- } else {
- /* Necessary since && and || have more precedence than &:
+ if (type == PIPE_BG && ctx->list_head != ctx->pipe) {
+ /* Necessary since && and || have precedence over &:
* "cmd1 && cmd2 &" must spawn both cmds, not only cmd2,
* in a backgrounded subshell.
*/
struct pipe *pi;
struct command *command;
- /* Is this actually the case? */
+ /* Is this actually this construct, all pipes end with && or ||? */
pi = ctx->list_head;
while (pi != ctx->pipe) {
if (pi->followup != PIPE_AND && pi->followup != PIPE_OR)
@@ -3408,11 +3405,16 @@ static void done_pipe(struct parse_context *ctx, pipe_style type)
command->cmd_type = CMD_NORMAL;
command->group = ctx->list_head;
#if !BB_MMU
-//TODO: is this correct?!
- command->group_as_string = xstrdup(ctx->as_string.data);
+ command->group_as_string = xstrndup(
+ ctx->as_string.data,
+ ctx->as_string.length - 1 /* do not copy last char, "&" */
+ );
#endif
/* Replace all pipes in ctx with one newly created */
ctx->list_head = ctx->pipe = pi;
+ } else {
+ no_conv:
+ ctx->pipe->followup = type;
}
/* Without this check, even just <enter> on command line generates
@@ -4855,7 +4857,9 @@ static struct pipe *parse_stream(char **pstring,
* Really, ask yourself, why
* "cmd && <newline>" doesn't start
* cmd but waits for more input?
- * No reason...)
+ * The only reason is that it might be
+ * a "cmd1 && <nl> cmd2 &" construct,
+ * cmd1 may need to run in BG).
*/
struct pipe *pi = ctx.list_head;
if (pi->num_cmds != 0 /* check #1 */