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-rw-r--r--modules/pam_exec/README3
1 files changed, 2 insertions, 1 deletions
diff --git a/modules/pam_exec/README b/modules/pam_exec/README
index 7e578ef1..efdd32dd 100644
--- a/modules/pam_exec/README
+++ b/modules/pam_exec/README
@@ -24,7 +24,8 @@ debug
expose_authtok
During authentication the calling command can read the password from stdin
- (3).
+ (3). Only first PAM_MAX_RESP_SIZE bytes of a password are provided to the
+ command.
log=file