diff options
Diffstat (limited to 'libbb/xfuncs_printf.c')
| -rw-r--r-- | libbb/xfuncs_printf.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/libbb/xfuncs_printf.c b/libbb/xfuncs_printf.c index 108e14043..46ae7ac60 100644 --- a/libbb/xfuncs_printf.c +++ b/libbb/xfuncs_printf.c @@ -333,6 +333,29 @@ void FAST_FUNC xsetenv(const char *key, const char *value) bb_error_msg_and_die(bb_msg_memory_exhausted); } +/* Handles "VAR=VAL" strings, even those which are part of environ + * _right now_ + */ +void FAST_FUNC bb_unsetenv(const char *var) +{ + char *tp = strchr(var, '='); + + if (!tp) { + unsetenv(var); + return; + } + + /* In case var was putenv'ed, we can't replace '=' + * with NUL and unsetenv(var) - it won't work, + * env is modified by the replacement, unsetenv + * sees "VAR" instead of "VAR=VAL" and does not remove it! + * horror :( */ + tp = xstrndup(var, tp - var); + unsetenv(tp); + free(tp); +} + + // Die with an error message if we can't set gid. (Because resource limits may // limit this user to a given number of processes, and if that fills up the // setgid() will fail and we'll _still_be_root_, which is bad.) |