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| author | Denis Vlasenko | 2009-03-19 01:59:59 +0000 |
|---|---|---|
| committer | Denis Vlasenko | 2009-03-19 01:59:59 +0000 |
| commit | 5c2b81470d0d2e0734866c57b29c2e2fa3e3bc13 (patch) | |
| tree | 5c9fe95e2e69b01e2cf07e097aa4b852a955ae12 | |
| parent | c1969f69b11dca4fdd8916684daea8b2abf63017 (diff) | |
| download | busybox-5c2b81470d0d2e0734866c57b29c2e2fa3e3bc13.zip busybox-5c2b81470d0d2e0734866c57b29c2e2fa3e3bc13.tar.gz | |
ash: fix "ash -c 'exec 1>&0'" complaining that fd 0 is busy
| -rw-r--r-- | shell/ash.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/shell/ash.c b/shell/ash.c index b333516..179d925 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -11684,7 +11684,8 @@ expandstr(const char *ps) { union node n; - /* XXX Fix (char *) cast. */ + /* XXX Fix (char *) cast. It _is_ a bug. ps is variable's value, + * and token processing _can_ alter it (delete NULs etc). */ setinputstring((char *)ps); readtoken1(pgetc(), PSSYNTAX, nullstr, 0); popfile(); @@ -13802,15 +13803,20 @@ int ash_main(int argc UNUSED_PARAM, char **argv) } state3: state = 4; - if (minusc) + if (minusc) { + /* evalstring pushes parsefile stack. + * Ensure we don't falsely claim that 0 (stdin) + * is one of stacked source fds */ + if (!sflag) + g_parsefile->fd = -1; evalstring(minusc, 0); + } if (sflag || minusc == NULL) { #if ENABLE_FEATURE_EDITING_SAVEHISTORY if (iflag) { const char *hp = lookupvar("HISTFILE"); - - if (hp != NULL) + if (hp) line_input_state->hist_file = hp; } #endif |