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Improve the main error message of i3-dump-log

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Michael Stapelberg 2012-05-09 19:46:44 +02:00
parent eeb6ff9237
commit 1b536d70cc
1 changed files with 28 additions and 1 deletions
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29
i3-dump-log/main.c
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@ -55,8 +55,35 @@ int main(int argc, char *argv[]) {
}
char *shmname = root_atom_contents("I3_SHMLOG_PATH");
if (shmname == NULL)
if (shmname == NULL) {
/* Something failed. Let’s invest a little effort to find out what it
* is. This is hugely helpful for users who want to debug i3 but are
* not used to the procedure yet. */
xcb_connection_t *conn;
int screen;
if ((conn = xcb_connect(NULL, &screen)) == NULL ||
xcb_connection_has_error(conn)) {
fprintf(stderr, "i3-dump-log: ERROR: Cannot connect to X11.\n\n");
if (getenv("DISPLAY") == NULL) {
fprintf(stderr, "Your DISPLAY environment variable is not set.\n");
fprintf(stderr, "Are you running i3-dump-log via SSH or on a virtual console?\n");
fprintf(stderr, "Try DISPLAY=:0 i3-dump-log\n");
exit(1);
}
fprintf(stderr, "FYI: The DISPLAY environment variable is set to \"%s\".\n", getenv("DISPLAY"));
exit(1);
}
if (root_atom_contents("I3_CONFIG_PATH") != NULL) {
fprintf(stderr, "i3-dump-log: ERROR: i3 is running, but SHM logging is not enabled.\n\n");
if (!is_debug_build()) {
fprintf(stderr, "You seem to be using a release version of i3:\n %s\n\n", I3_VERSION);
fprintf(stderr, "Release versions do not use SHM logging by default,\ntherefore i3-dump-log does not work.\n\n");
fprintf(stderr, "Please follow this guide instead:\nhttp://i3wm.org/docs/debugging-release-version.html\n");
exit(1);
}
}
errx(EXIT_FAILURE, "Cannot get I3_SHMLOG_PATH atom contents. Is i3 running on this display?");
}
if (*shmname == '\0')
errx(EXIT_FAILURE, "Cannot dump log: SHM logging is disabled in i3.");