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Common/command: Guard strchr/strlen from NULL pointer

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Guard strchr/strlen from being called with NULL pointer.
This line is crashing when command "env" is called without subcommand.

The cmd is NULL in this case because the calling function "do_env"
decremented the argc without checking if there are still arguments available.

Signed-off-by: Thomas Weber <weber@corscience.de>
This commit is contained in:
Thomas Weber 2010-11-24 13:07:51 +01:00 committed by Wolfgang Denk
parent 5904da0214
commit 7013c06124
1 changed files with 2 additions and 0 deletions
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2
common/command.c
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@ -108,6 +108,8 @@ cmd_tbl_t *find_cmd_tbl (const char *cmd, cmd_tbl_t *table, int table_len)
int len;
int n_found = 0;
if (!cmd)
return NULL;
/*
* Some commands allow length modifiers (like "cp.b");
* compare command name only until first dot.