Propagate --quiet to children Firejail'ed processes

If quiet, set environment variable FIREJAIL_QUIET to "yes" before
spawning the child process.
Upon starting Firejail, become quiet if the FIREJAIL_QUIET environment
variable is set to "yes".

Signed-off-by: Quentin Minster <quentin@minster.io>

1 files changed, 6 insertions, 1 deletions

diff --git a/src/firejail/main.c b/src/firejail/main.c
index ece4c2cb5..7fa552c98 100644
--- a/src/firejail/main.c
+++ b/src/firejail/main.c
@@ -907,7 +907,8 @@ int main(int argc, char **argv) {
 
         // get starting timestamp, process --quiet
         start_timestamp = getticks();
-        if (check_arg(argc, argv, "--quiet", 1))
+        char *env_quiet = getenv("FIREJAIL_QUIET");
+        if (check_arg(argc, argv, "--quiet", 1) || (env_quiet && strcmp(env_quiet, "yes") == 0))
                 arg_quiet = 1;
 
         // cleanup at exit
@@ -2422,6 +2423,10 @@ int main(int argc, char **argv) {
         }
         EUID_ASSERT();
 
+        // pass --quiet as an environment variable, in case the command calls further firejailed commands
+        if (arg_quiet)
+                setenv("FIREJAIL_QUIET", "yes", 1);
+
         // block X11 sockets
         if (arg_x11_block)
                 x11_block();