From 04c480dfaec9723b9330d9c193ee30e55c030cfb Mon Sep 17 00:00:00 2001
From: Christian Klinger
Date: Tue, 23 Aug 2016 22:32:29 +0200
Subject: read the environment PWGUI_USERPREFIX and prefix the username with
 it.

---
 src/pwgui/main.cpp | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/src/pwgui/main.cpp b/src/pwgui/main.cpp
index 9f3bbef..81c7979 100644
--- a/src/pwgui/main.cpp
+++ b/src/pwgui/main.cpp
@@ -26,6 +26,8 @@
 #define BUFLEN 9000
 #define ENVLEN 20000
 
+#define ENV_USERPREFIX "PWGUI_USERPREFIX"
+
 #define DEBUG(...) fprintf(stderr, "DEBUG: [pwgui] " __VA_ARGS__)
 #define WARNING(...) fprintf(stderr, "WARNING: [pwgui] " __VA_ARGS__)
 #define ERROR(...) fprintf(stderr, "ERROR: [pwgui] " __VA_ARGS__)
@@ -51,6 +53,15 @@ static char *helper_urlencode(char *s, char *enc);
 static int helper_cupsError(const int code);
 static void helper_messageBox(const char *caption, const char *text, const bool error = false);
 
+static void demo();
+/*
+ * Note to the next HiWi who wants to refactor this to use something like boost::program_options:
+ * Don't do it unless you are certain that you understood the behaviour described here:
+ * > https://www.samba.org/samba/docs/man/manpages/smbspool.8.html
+ *
+ * Making all arguments positional and making the *first* argument optional was just not a good idea.
+ * 
+ * */
 int main(int argc, char *argv[])
 {
 	char tmpfile[NAMELEN];
@@ -58,6 +69,8 @@ int main(int argc, char *argv[])
 	char backend[NAMELEN];
 	int spoolres;
 
+
+
 	// Pretty much what smbspool does, but in a generalized way
 	if (argc > 2 && strstr(argv[0], ":/") == NULL && strstr(argv[1], ":/") != NULL) {
 		argv++;
@@ -162,6 +175,7 @@ int main(int argc, char *argv[])
 
 	// Try right away with what we got
 	spoolres = run_backend(backend, device, argv[1], argv[2], argv[3], argv[4], argv[5], tmpfile, NULL);
+
 	helper_killGui();
 	if (spoolres != CUPS_BACKEND_AUTH_REQUIRED) {
 		remove(tmpfile);
@@ -171,7 +185,18 @@ int main(int argc, char *argv[])
 	// Seems we need the dialog
 	int status;
 	char creds[NAMELEN], *pass = NULL;
-	snprintf(creds, NAMELEN, "%s", argv[2]);
+
+    /* copy the username but prefix it with the content of PRINTERGUI_USERPREFIX env var */
+    char* user_prefix = getenv(ENV_USERPREFIX);
+
+	if (user_prefix == NULL) {
+        /* ok, user_prefix is empty */
+		snprintf(creds, NAMELEN, "%s", argv[2]);
+	} else {
+		/* use prefix */
+		snprintf(creds, NAMELEN, "%s%s", user_prefix, argv[2]);
+	}
+
 	do {
 		WARNING("Direct printing failed. Opening PW dialog....\n");
 		int pfd[2];
-- 
cgit v1.2.3-55-g7522