diff options
Diffstat (limited to 'lib/libc/stdlib/getenv.c')
-rw-r--r-- | lib/libc/stdlib/getenv.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/lib/libc/stdlib/getenv.c b/lib/libc/stdlib/getenv.c index 5d445e18d93b..bf79cb6b0d79 100644 --- a/lib/libc/stdlib/getenv.c +++ b/lib/libc/stdlib/getenv.c @@ -691,3 +691,28 @@ unsetenv(const char *name) return (0); } + +/* + * Unset all variable by flagging them as inactive. No variable is + * ever freed. + */ +int +clearenv(void) +{ + int ndx; + + /* Initialize environment. */ + if (__merge_environ() == -1 || (envVars == NULL && __build_env() == -1)) + return (-1); + + /* Remove from the end to not shuffle memory too much. */ + for (ndx = envVarsTotal - 1; ndx >= 0; ndx--) { + envVars[ndx].active = false; + if (envVars[ndx].putenv) + __remove_putenv(ndx); + } + + __rebuild_environ(0); + + return (0); +} |