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| author | jan.nijtmans <nijtmans@users.sourceforge.net> | 2016-02-19 10:49:57 (GMT) |
|---|---|---|
| committer | jan.nijtmans <nijtmans@users.sourceforge.net> | 2016-02-19 10:49:57 (GMT) |
| commit | 52862d4aeb45df2aad6c9d0b2ef00fcb89790be8 (patch) | |
| tree | 25e381491fef4a6c92c639b8baad38a75c0e303f /generic/tclEnv.c | |
| parent | f7ea5b6cc57fafcbcb3377e83fdbc4d999d123d4 (diff) | |
| download | tcl-52862d4aeb45df2aad6c9d0b2ef00fcb89790be8.zip tcl-52862d4aeb45df2aad6c9d0b2ef00fcb89790be8.tar.gz tcl-52862d4aeb45df2aad6c9d0b2ef00fcb89790be8.tar.bz2 | |
Proposed fix for [9b47029467631832]: testing existence of env(some_thing) destroys traces.
Was the comment [http://core.tcl.tk/tcl/artifact/f93c0675115b73ce?ln=554|here] not correct after all?.
Diffstat (limited to 'generic/tclEnv.c')
| -rw-r--r-- | generic/tclEnv.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/generic/tclEnv.c b/generic/tclEnv.c index 2cb240d..66ddb57 100644 --- a/generic/tclEnv.c +++ b/generic/tclEnv.c @@ -551,7 +551,8 @@ TclGetEnv( * array. * * Results: - * Always returns NULL to indicate success. + * Returns NULL to indicate success, or an error-message if the array + * element being handled doesn't exist. * * Side effects: * Environment variable changes get propagated. If the whole "env" array @@ -609,8 +610,7 @@ EnvTraceProc( const char *value = TclGetEnv(name2, &valueString); if (value == NULL) { - Tcl_UnsetVar2(interp, name1, name2, 0); - return NULL; + return (char *) "no such variable"; } Tcl_SetVar2(interp, name1, name2, value, 0); Tcl_DStringFree(&valueString); |