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-rw-r--r--src/pwgui/main.cpp73
1 files changed, 42 insertions, 31 deletions
diff --git a/src/pwgui/main.cpp b/src/pwgui/main.cpp
index 3d6059c..319cd40 100644
--- a/src/pwgui/main.cpp
+++ b/src/pwgui/main.cpp
@@ -19,7 +19,11 @@
#define NAMELEN 400
#define BUFLEN 1000
-#define ENVLEN 10000
+#define ENVLEN 20000
+
+#define DEBUG(...) fprintf(stderr, "DEBUG: [pwgui] " __VA_ARGS__)
+#define WARNING(...) fprintf(stderr, "WARNING: [pwgui] " __VA_ARGS__)
+#define ERROR(...) fprintf(stderr, "ERROR: [pwgui] " __VA_ARGS__)
#define CUSTOM_CUPS_NO_SUCH_PRINTER 50
@@ -56,7 +60,7 @@ int main(int argc, char *argv[])
// First check parameter count
if (argc != 6 && argc != 7) {
- fputs("ERROR: Invalid number of arguments passed.\n", stderr);
+ ERROR("Invalid number of arguments passed.\n");
return CUPS_BACKEND_FAILED;
}
@@ -67,7 +71,7 @@ int main(int argc, char *argv[])
} else if (strstr(argv[0], ":/") != NULL) {
snprintf(device, NAMELEN, "%s", argv[0]);
} else {
- fputs("ERROR: No device URI given.\n", stderr);
+ ERROR("No device URI given.\n");
return CUPS_BACKEND_FAILED;
}
@@ -80,19 +84,20 @@ int main(int argc, char *argv[])
if (access(backend, X_OK | R_OK) != 0) {
helper_getpiduid(argv[2], argv[3]);
helper_messageBox("PrinterGUI", "Kein Backend für den gewählten Drucker vorhanden.");
- fprintf(stderr, "ERROR: Backend %s is not executable.\n", backend);
+ ERROR("Backend %s is not executable. Over and out.\n", backend);
return CUPS_BACKEND_FAILED;
}
// argv[3] is title, get printergui pid from it
if (!helper_getpiduid(argv[2], argv[3])) {
// El cheapo validation failed. Don't enable "smart mode" (GUI etc), just exec real backend
- fputs("ERROR: Dumb mode - will exec actual backend.\n", stderr);
+ ERROR("Dumb mode - will exec actual backend.\n");
// Mimic cups behaviour wrt dropping privs (Only 0700 or 0500 == root)
helper_loadlpuser();
struct stat st;
if (stat(backend, &st) != 0 || (st.st_mode & 0011) != 0) helper_dropprivs();
kill(pid, SIGTERM);
+ WARNING("Over and out.\n");
execv(backend, argv);
exit(127);
}
@@ -105,7 +110,7 @@ int main(int argc, char *argv[])
int fh = open(tmpfile, O_CREAT | O_WRONLY | O_TRUNC, 0600);
if (fh < 0) {
helper_messageBox("PrinterGUI", "Konnte temporäre Datei für den Druckjob nicht anlegen.");
- fprintf(stderr, "ERROR: Could not open %s for writing..\n", tmpfile);
+ ERROR("Could not open %s for writing. Over and out.\n", tmpfile);
return CUPS_BACKEND_FAILED;
}
char buffer[BUFLEN];
@@ -116,20 +121,20 @@ int main(int argc, char *argv[])
if (bytes == 0) break;
if (bytes < 0) {
helper_messageBox("PrinterGUI", "Konnte den Druckjob nicht auf STDIN empfangen.");
- fprintf(stderr, "ERROR: Could not read print job from STDIN.\n");
+ ERROR("Could not read print job from STDIN. Over and out.\n");
remove(tmpfile);
return CUPS_BACKEND_FAILED;
}
if ((ret = write(fh, buffer, bytes)) != bytes) {
helper_messageBox("PrinterGUI", "Konnte Druckjob nicht in temporäre Datei schreiben.");
- fprintf(stderr, "ERROR: Could not write %d bytes to %s (wrote %d)\n", (int)bytes, tmpfile, (int)ret);
+ ERROR("Could not write %d bytes to %s (wrote %d). Over and out.\n", (int)bytes, tmpfile, (int)ret);
remove(tmpfile);
return CUPS_BACKEND_FAILED;
}
total += bytes;
}
close(fh);
- fprintf(stderr, "ERROR: Read %d bytes from stdin.\n", total);
+ DEBUG("Read %d bytes from stdin.\n", total);
//
} else {
// File given, check if file exists
@@ -137,7 +142,7 @@ int main(int argc, char *argv[])
int fh = open(tmpfile, O_RDONLY);
if (fh < 0) {
helper_messageBox("PrinterGUI", "Konnte den Druckjob nicht vom Dateisystem lesen.");
- fprintf(stderr, "ERROR: Could not open %s for reading..\n", tmpfile);
+ ERROR("Could not open %s for reading. Over and out.\n", tmpfile);
return CUPS_BACKEND_FAILED;
}
close(fh);
@@ -154,11 +159,11 @@ int main(int argc, char *argv[])
char creds[NAMELEN], *pass = NULL;
snprintf(creds, NAMELEN, "%s", argv[2]);
do {
- fputs("ERROR: Opening PW dialog....\n", stderr);
+ WARNING("Direct printing failed. Opening PW dialog....\n");
int pfd[2];
if (pipe(pfd) != 0) {
helper_messageBox("PrinterGUI", "Konnte pipe für die GUI nicht anlegen.");
- fputs("ERROR: Could not create pipe for GUI.\n", stderr);
+ ERROR("Could not create pipe for GUI. Over and out.\n");
return CUPS_BACKEND_FAILED;
}
const pid_t pid = fork();
@@ -182,7 +187,7 @@ int main(int argc, char *argv[])
waitpid(pid, NULL, 0); // Don't check status, just look at pipe data
if (bytes <= 0) { // Probably means user pressed cancel
helper_messageBox("PrinterGUI", "Druckauftrag abgebrochen.");
- fputs("ERROR: Could not read anything from pipe after showing GUI.\n", stderr);
+ ERROR("Could not read anything from pipe after showing GUI. Over and out.\n");
remove(tmpfile);
return CUPS_BACKEND_CANCEL;
}
@@ -194,7 +199,7 @@ int main(int argc, char *argv[])
helper_cupsError(status);
} while (status != CUPS_BACKEND_OK);
remove(tmpfile);
- fprintf(stderr, "ERROR: Job submitted.\n");
+ ERROR("Job submitted. Over and out.\n");
return CUPS_BACKEND_OK;
}
@@ -251,11 +256,11 @@ static int run_backend(char *backend, char *uri, char *jobid, char *user, char *
int readlen = 0;
while ((readlen = read(pipefd[0], buffer, BUFLEN-1)) > 0) {
buffer[readlen] = '\0';
- fprintf(stderr, "ERROR: BACKEND: %s\n", buffer);
+ ERROR("BACKEND: %s\n", buffer);
if (strstr(buffer, "Unable to get printer status (Unauthorized)") != NULL) {
needAuth = true;
if (kill(pid, SIGTERM) < 0) {
- fprintf(stderr, "ERROR: Sending kill1 to backend %d failed: %d\n", (int)pid, errno);
+ ERROR("Sending SIGTERM to backend %d failed: %d\n", (int)pid, errno);
}
break;
} else if (strstr(buffer, "Destination printer does not exist") != NULL) {
@@ -274,19 +279,19 @@ static int run_backend(char *backend, char *uri, char *jobid, char *user, char *
}
}
if (needAuth) {
- fprintf(stderr, "ERROR: Killed backend because of 'unauthorized' message (iprint crap?), trying with auth\n");
+ ERROR("Killed backend because of 'unauthorized' message (iprint crap?), trying with auth\n");
return CUPS_BACKEND_AUTH_REQUIRED;
}
if (nonexistent) {
- fprintf(stderr, "ERROR: Destination printer does not exist!\n");
+ ERROR("Destination printer does not exist!\n");
return CUSTOM_CUPS_NO_SUCH_PRINTER;
}
if (!WIFEXITED(status)) {
- fprintf(stderr, "ERROR: Running backend %s failed!\n", backend);
+ ERROR("Running backend %s failed!\n", backend);
return CUPS_BACKEND_FAILED;
}
status = WEXITSTATUS(status);
- if (status != CUPS_BACKEND_OK) fprintf(stderr, "ERROR: Backend returned %d\n", status);
+ if (status != CUPS_BACKEND_OK) ERROR("Backend returned %d\n", status);
return status;
}
@@ -296,34 +301,34 @@ static bool helper_getpiduid(char *user, char *title)
// and we have to be able to kill it, only then we assume we should bother the user
// with an authentication dialog
if (strncmp(title, "gui-", 4) != 0) {
- fprintf(stderr, "WARNING: Job Title doesnt start with 'gui-' (Is: %s)\n", title);
+ WARNING("Job Title doesnt start with 'gui-' (Is: %s)\n", title);
return false; // Wrong job title
}
int p = atoi(title + 4);
struct stat st;
struct passwd *pw = getpwnam(user);
if (pw == NULL) {
- fprintf(stderr, "WARNING: Cannot getpwnam %s\n", user);
+ WARNING("Cannot getpwnam %s\n", user);
return false;
}
char bin[PATH_MAX+1], tmp[100];
snprintf(tmp, 100, "/proc/%d/exe", p);
if (realpath(tmp, bin) == NULL) {
- fprintf(stderr, "WARNING: Cannot get realpath of %s\n", tmp);
+ WARNING("Cannot get realpath of %s\n", tmp);
return false;
}
char *last = strrchr(bin, '/');
if (last == NULL || strcmp(last, "/printergui") != 0) {
- fprintf(stderr, "WARNING: %s does not end in /printergui\n", bin);
+ WARNING("%s does not end in /printergui\n", bin);
return false; // Wrong process
}
// PID passed via job title seems to be the printergui
if (lstat(tmp, &st) < 0) {
- fprintf(stderr, "WARNING: Could not lstat() %s\n", tmp);
+ WARNING("Could not lstat() %s\n", tmp);
return false;
}
if (st.st_uid != pw->pw_uid) {
- fprintf(stderr, "WARNING: Owner of %s: %d, owner of job: %d (%s)\n", tmp, (int)st.st_uid, (int)pw->pw_uid, user);
+ WARNING("Owner of %s: %d, owner of job: %d (%s)\n", tmp, (int)st.st_uid, (int)pw->pw_uid, user);
return false; // Print job user doesn't match printergui process owner
}
// All checks passed, make stuff global
@@ -348,7 +353,7 @@ static bool helper_getpiduid(char *user, char *title)
gui_env[bytes+1] = '\0';
}
}
- fprintf(stderr, "DEBUG: getpiduid successful!\n");
+ DEBUG("getpiduid successful!\n");
return true;
}
@@ -369,7 +374,7 @@ static void helper_dropprivs()
setuid(ruid);
chdir("/");
if (setuid(0) != -1) {
- fputs("ERROR: setuid-fu!?\n", stderr);
+ ERROR("setuid-fu!?\n");
exit(CUPS_BACKEND_FAILED);
}
}
@@ -383,6 +388,7 @@ static void helper_copyenv()
char *value = equal + 1;
*equal = '\0';
setenv(ptr, value, 1);
+ DEBUG("Setting Env: '%s' = '%s'\n", ptr, value);
*equal = '=';
}
ptr += strlen(ptr) + 1;
@@ -465,18 +471,23 @@ static int helper_cupsError(const int code)
case CUSTOM_CUPS_NO_SUCH_PRINTER:
helper_messageBox("CUPS Fehler", "Die Druckerwarteschlange existiert nicht auf dem print server. Fehlerhafte lokale printers.conf?");
return CUPS_BACKEND_CANCEL;
+ default:
+ ERROR("Unknown cupsError code %d\n", code);
+ helper_messageBox("CUPS Fehler", "Unbekannter Fehler beim Drucken", true);
+ break;
}
return code;
}
static void helper_messageBox(const char *caption, const char *text, const bool error)
{
+ WARNING("Trying to MsgBox: %s\n", text);
const pid_t pid = fork();
if (pid == 0) {
// Child - Qt
char *argv[1];
- argv[1] = (char*)"bla";
- int argc;
+ argv[0] = (char*)"bla";
+ int argc = 1;
helper_dropprivs();
helper_copyenv();
QApplication a(argc, argv);
@@ -485,7 +496,7 @@ static void helper_messageBox(const char *caption, const char *text, const bool
} else {
QMessageBox::information(NULL, QString::fromUtf8(caption), QString::fromUtf8(text));
}
- exit(a.exec());
+ exit(0);
return;
}
// Main (Parent)
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-11-21 18:40:39 +0100