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Fix #3535 - Check for DISPLAY when requesting version information

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TAL 2018-12-09 01:32:34 +01:00
parent b192bf4bd2
commit b479dc1a0f
1 changed files with 7 additions and 0 deletions
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7
src/display_version.c
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@ -55,6 +55,13 @@ static yajl_callbacks version_callbacks = {
*
*/
void display_running_version(void) {
if (getenv("DISPLAY") == NULL) {
fprintf(stderr, "\nYour DISPLAY environment variable is not set.\n");
fprintf(stderr, "Are you running i3 via SSH or on a virtual console?\n");
fprintf(stderr, "Try DISPLAY=:0 i3 --moreversion\n");
exit(EXIT_FAILURE);
}
char *pid_from_atom = root_atom_contents("I3_PID", conn, conn_screen);
if (pid_from_atom == NULL) {
/* If I3_PID is not set, the running version is older than 4.2-200. */