Add better documentation for "-c" option.

2 files changed, 4 insertions, 2 deletions

diff --git a/src/firejail/usage.c b/src/firejail/usage.c
index 84bc22571..b5d41b3e8 100644
--- a/src/firejail/usage.c
+++ b/src/firejail/usage.c
@@ -42,7 +42,7 @@ static char *usage_str =
         "    --blacklist=filename - blacklist directory or file.\n"
         "    --build - build a whitelisted profile for the application.\n"
         "    --build=filename - build a whitelisted profile for the application.\n"
-        "    -c - execute command and exit.\n"
+        "    -c - login shell compatibility option (has no effect).\n"
         "    --caps - enable default Linux capabilities filter.\n"
         "    --caps.drop=all - drop all capabilities.\n"
         "    --caps.drop=capability,capability - blacklist capabilities filter.\n"
diff --git a/src/man/firejail.txt b/src/man/firejail.txt
index e7917737e..2fe2e8bfa 100644
--- a/src/man/firejail.txt
+++ b/src/man/firejail.txt
@@ -186,7 +186,9 @@ Example:
 $ firejail --build=vlc.profile vlc ~/Videos/test.mp4
 .TP
 \fB\-c
-Execute command and exit.
+Login shell compatibility option. This option is use by some login programs when executing
+the login shell, such as when firejail is used as a restricted login shell. It currently does
+not change the execution of firejail.
 .TP
 \fB\-\-caps
 Linux capabilities is a kernel feature designed to split up the root privilege into a set of distinct privileges.