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| author | Denys Vlasenko | 2017-08-04 15:24:49 +0200 |
|---|---|---|
| committer | Denys Vlasenko | 2017-08-04 15:24:49 +0200 |
| commit | f8cdc7a2bcd0a9d067f5ca7da8ce7bc9c98cf34e (patch) | |
| tree | 27c49c304513d625e38abcd0df2c55792dcfbc7f | |
| parent | 7344755823df5510b089cc5db30f8c1cdebdc5a2 (diff) | |
| download | busybox-f8cdc7a2bcd0a9d067f5ca7da8ce7bc9c98cf34e.zip busybox-f8cdc7a2bcd0a9d067f5ca7da8ce7bc9c98cf34e.tar.gz | |
ash: BASH_XTRACEFD bashism
Based on patch by Johannes Schindelin <johannes.schindelin@gmx.de>
function old new delta
evalcommand 1447 1500 +53
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | shell/ash.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/shell/ash.c b/shell/ash.c index 2ad86c1..e80425f 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -188,6 +188,7 @@ #define BASH_PIPEFAIL ENABLE_ASH_BASH_COMPAT #define BASH_HOSTNAME_VAR ENABLE_ASH_BASH_COMPAT #define BASH_SHLVL_VAR ENABLE_ASH_BASH_COMPAT +#define BASH_XTRACEFD ENABLE_ASH_BASH_COMPAT #if defined(__ANDROID_API__) && __ANDROID_API__ <= 24 /* Bionic at least up to version 24 has no glob() */ @@ -9792,6 +9793,15 @@ evalcommand(union node *cmd, int flags) expredir(cmd->ncmd.redirect); redir_stop = pushredir(cmd->ncmd.redirect); preverrout_fd = 2; + if (BASH_XTRACEFD && xflag) { + /* NB: bash closes fd == $BASH_XTRACEFD when it is changed. + * we do not emulate this. We only use its value. + */ + const char *xtracefd = lookupvar("BASH_XTRACEFD"); + if (xtracefd && is_number(xtracefd)) + preverrout_fd = atoi(xtracefd); + + } status = redirectsafe(cmd->ncmd.redirect, REDIR_PUSH | REDIR_SAVEFD2); path = vpath.var_text; |