diff options
| -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 2ad86c187..e80425f5e 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; |