File resume_hybernate.patch of Package physlock

From e688b425399d12ba5e58138ade9956d0f586f3c4 Mon Sep 17 00:00:00 2001
From: ninad <ninadhuilgol@gmail.com>
Date: Tue, 9 Jun 2020 18:52:55 +0530
Subject: [PATCH] Fix issue #97 with very basic signal handling

---
 main.c     |   16 +++++++++++++++-
 options.c  |    8 ++++++--
 physlock.1 |    8 ++++++++
 physlock.h |    1 +
 4 files changed, 30 insertions(+), 3 deletions(-)

--- main.c
+++ main.c	2024-09-11 11:29:08.248580547 +0000
@@ -137,6 +137,8 @@ int main(int argc, char **argv) {
 	int try = 0, root_user = 1;
 	uid_t owner;
 	userinfo_t *u = &user;
+	int sigusr1recieved = 0;
+	sigset_t sigusr1;
 
 	oldvt = oldsysrq = oldprintk = vt.nr = vt.fd = -1;
 	cmdpid = -1;
@@ -152,9 +154,14 @@ int main(int argc, char **argv) {
 	setup_signal(SIGQUIT, sa_handler_exit);
 	setup_signal(SIGHUP, SIG_IGN);
 	setup_signal(SIGINT, SIG_IGN);
-	setup_signal(SIGUSR1, SIG_IGN);
+	if (options->staggered != 1) {
+		setup_signal(SIGUSR1, SIG_IGN);
+	}
 	setup_signal(SIGUSR2, SIG_IGN);
 
+	sigemptyset(&sigusr1);
+	sigaddset(&sigusr1, SIGUSR1);
+
 	vt_init();
 	vt_get_current(&oldvt, &owner);
 
@@ -221,6 +228,13 @@ int main(int argc, char **argv) {
 
 	locked = !options->no_auth;
 
+	if (options->staggered == 1) {
+		sigprocmask(SIG_BLOCK,&sigusr1,NULL);
+		sigwait(&sigusr1, &sigusr1recieved);
+		sigprocmask(SIG_UNBLOCK,&sigusr1,NULL);
+		fflush(vt.ios);
+	}
+
 	while (locked) {
 		if (!root_user && try >= (u == &root ? 1 : 3)) {
 			u = u == &root ? &user : &root;
--- options.c
+++ options.c	2024-09-11 11:32:08.333282851 +0000
@@ -28,7 +28,7 @@ static options_t _options;
 const options_t *options = (const options_t*) &_options;
 
 void print_usage() {
-	printf("usage: physlock [-dhLlmsbanv] [-p MSG]\n");
+	printf("usage: physlock [-dhLlmsbanvw] [-p MSG]\n");
 }
 
 void print_version() {
@@ -45,9 +45,10 @@ void parse_options(int argc, char **argv
 	_options.disable_sysrq = 0;
 	_options.lock_switch = -1;
 	_options.mute_kernel_messages = 0;
+        _options.staggered = 0;
 	_options.no_auth = 0;
 
-	while ((opt = getopt(argc, argv, "dhLlmnp:svb:a:")) != -1) {
+	while ((opt = getopt(argc, argv, "dhLlmnp:svb:a:w")) != -1) {
 		switch (opt) {
 			case '?':
 				print_usage();
@@ -85,6 +86,9 @@ void parse_options(int argc, char **argv
 			case 'v':
 				print_version();
 				exit(0);
+			case 'w':
+				_options.staggered = 1;
+				break;
 		}
 	}
 }
--- physlock.1
+++ physlock.1	2024-09-11 11:29:08.248580547 +0000
@@ -62,6 +62,14 @@ Disable SysRq mechanism while physlock i
 .TP
 .B \-v
 Print version information to standard output and exit.
+.TP
+.B \-w
+Wait until a SIGUSR1 signal is received to prompt for authentication.
+Useful if the first authentication attempt always fails
+due to bad input buffering in the virtual terminal.
+.BI WARNING:
+When using this option, ensure that some external program sends a SIGUSR1
+signal to physlock. Otherwise, you will be locked out of your session.
 .SH AUTHORS
 .TP
 Bert Muennich <ber.t at gmx.com>
--- physlock.h
+++ physlock.h	2024-09-11 11:30:24.051192128 +0000
@@ -55,6 +55,7 @@ typedef struct options_s {
 	int lock_switch;
 	int mute_kernel_messages;
 	int no_auth;
+	int staggered;
 	const char *prompt;
 	const char *command_before;
 	const char *command_after;