diff options
Diffstat (limited to 'shell/hush.c')
| -rw-r--r-- | shell/hush.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/shell/hush.c b/shell/hush.c index 9e574c90c..b80468f58 100644 --- a/shell/hush.c +++ b/shell/hush.c @@ -3218,7 +3218,6 @@ static int redirect_opt_num(o_string *o) } #if ENABLE_HUSH_TICK -/* NB: currently disabled on NOMMU */ static FILE *generate_stream_from_list(struct pipe *head) { FILE *pf; @@ -3229,6 +3228,10 @@ static FILE *generate_stream_from_list(struct pipe *head) /* By using vfork here, we suspend parent till child exits or execs. * If child will not do it before it fills the pipe, it can block forever * in write(STDOUT_FILENO), and parent (shell) will be also stuck. + * Try this script: + * yes "0123456789012345678901234567890" | dd bs=32 count=64k >TESTFILE + * huge=`cat TESTFILE` # will block here forever + * echo OK */ pid = BB_MMU ? fork() : vfork(); if (pid < 0) |