Customize 'permission denied' error. From: Jan Safranek Add Fedora-specific message to error output when dumpcap cannot be started because of permissions. Signed-off-by: Jan Safranek diff -up wireshark-1.6.1/capture_sync.c.group-msg wireshark-1.6.1/capture_sync.c --- wireshark-1.6.1/capture_sync.c.group-msg 2011-07-18 22:18:53.000000000 +0200 +++ wireshark-1.6.1/capture_sync.c 2011-07-21 10:52:28.962144991 +0200 @@ -351,6 +351,7 @@ sync_pipe_start(capture_options *capture gchar *signal_pipe_name; #else char errmsg[1024+1]; + const char *securitymsg = ""; int sync_pipe[2]; /* pipe used to send messages from child to parent */ enum PIPES { PIPE_READ, PIPE_WRITE }; /* Constants 0 and 1 for PIPE_READ and PIPE_WRITE */ #endif @@ -596,8 +597,10 @@ sync_pipe_start(capture_options *capture dup2(sync_pipe[PIPE_WRITE], 2); ws_close(sync_pipe[PIPE_READ]); execv(argv[0], (gpointer)argv); - g_snprintf(errmsg, sizeof errmsg, "Couldn't run %s in child process: %s", - argv[0], g_strerror(errno)); + if (errno == EPERM || errno == EACCES) + securitymsg = "\nAre you a member of the 'wireshark' group? Try running\n'usermod -a -G wireshark _your_username_' as root."; + g_snprintf(errmsg, sizeof errmsg, "Couldn't run %s in child process: %s%s", + argv[0], g_strerror(errno), securitymsg); sync_pipe_errmsg_to_parent(2, errmsg, ""); /* Exit with "_exit()", so that we don't close the connection @@ -687,6 +690,7 @@ sync_pipe_open_command(const char** argv int i; #else char errmsg[1024+1]; + const char *securitymsg = ""; int sync_pipe[2]; /* pipe used to send messages from child to parent */ int data_pipe[2]; /* pipe used to send data from child to parent */ #endif @@ -811,8 +815,10 @@ sync_pipe_open_command(const char** argv ws_close(sync_pipe[PIPE_READ]); ws_close(sync_pipe[PIPE_WRITE]); execv(argv[0], (gpointer)argv); - g_snprintf(errmsg, sizeof errmsg, "Couldn't run %s in child process: %s", - argv[0], g_strerror(errno)); + if (errno == EPERM || errno == EACCES) + securitymsg = "\nAre you a member of the 'wireshark' group? Try running\n'usermod -a -G wireshark _your_username_' as root."; + g_snprintf(errmsg, sizeof errmsg, "Couldn't run %s in child process: %s%s", + argv[0], g_strerror(errno), securitymsg); sync_pipe_errmsg_to_parent(2, errmsg, ""); /* Exit with "_exit()", so that we don't close the connection