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| author | Denys Vlasenko | 2011-03-08 12:44:02 +0100 |
|---|---|---|
| committer | Denys Vlasenko | 2011-03-08 12:44:02 +0100 |
| commit | 86cf0364bd58e07646a23a1128e4a9ea79189579 (patch) | |
| tree | 22e161a76936796b5f8d49536684d371e7e8bfc3 /coreutils/printenv.c | |
| parent | 6b6af53426d98ab513972bd710f250e246e7fc98 (diff) | |
| download | busybox-86cf0364bd58e07646a23a1128e4a9ea79189579.zip busybox-86cf0364bd58e07646a23a1128e4a9ea79189579.tar.gz | |
printenv: fix environ == NULL segfault
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'coreutils/printenv.c')
| -rw-r--r-- | coreutils/printenv.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/coreutils/printenv.c b/coreutils/printenv.c index 33be5c0..d0fb716 100644 --- a/coreutils/printenv.c +++ b/coreutils/printenv.c @@ -19,9 +19,14 @@ int printenv_main(int argc UNUSED_PARAM, char **argv) /* no variables specified, show whole env */ if (!argv[1]) { - int e = 0; - while (environ[e]) - puts(environ[e++]); + char **e = environ; + + /* environ can be NULL! (for example, after clearenv()) + * Check for that: + */ + if (e) + while (*e) + puts(*e++); } else { /* search for specified variables and print them out if found */ char *arg, *env; |