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From 53e56c751b3f2be4154760788850c51dbffc0add Mon Sep 17 00:00:00 2001
From: Arnas Udovicius <zordsdavini@gmail.com>
Date: Tue, 26 Nov 2019 16:16:15 +0200
Subject: [PATCH] Read colors from Xresources
---
config.def.h | 14 +++++++++--
slock.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++
util.h | 3 +++
3 files changed, 83 insertions(+), 2 deletions(-)
diff --git a/config.def.h b/config.def.h
index 6288856..bfc1ba0 100644
--- a/config.def.h
+++ b/config.def.h
@@ -3,11 +3,21 @@ static const char *user = "nobody";
static const char *group = "nogroup";
static const char *colorname[NUMCOLS] = {
- [INIT] = "black", /* after initialization */
- [INPUT] = "#005577", /* during input */
+ [INIT] = "black", /* after initialization */
+ [INPUT] = "#005577", /* during input */
[FAILED] = "#CC3333", /* wrong password */
[CAPS] = "red", /* CapsLock on */
};
+/*
+ * Xresources preferences to load at startup
+ */
+ResourcePref resources[] = {
+ { "color0", STRING, &colorname[INIT] },
+ { "color4", STRING, &colorname[INPUT] },
+ { "color1", STRING, &colorname[FAILED] },
+ { "color3", STRING, &colorname[CAPS] },
+};
+
/* treat a cleared input like a wrong password (color) */
static const int failonclear = 1;
diff --git a/slock.c b/slock.c
index 5f4fb7a..2395547 100644
--- a/slock.c
+++ b/slock.c
@@ -6,6 +6,7 @@
#include <ctype.h>
#include <errno.h>
+#include <math.h>
#include <grp.h>
#include <pwd.h>
#include <stdarg.h>
@@ -19,6 +20,7 @@
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/XKBlib.h>
+#include <X11/Xresource.h>
#include "arg.h"
#include "util.h"
@@ -46,6 +48,19 @@ struct xrandr {
int errbase;
};
+/* Xresources preferences */
+enum resource_type {
+ STRING = 0,
+ INTEGER = 1,
+ FLOAT = 2
+};
+
+typedef struct {
+ char *name;
+ enum resource_type type;
+ void *dst;
+} ResourcePref;
+
#include "config.h"
static void
@@ -306,6 +321,57 @@ lockscreen(Display *dpy, struct xrandr *rr, int screen)
return NULL;
}
+int
+resource_load(XrmDatabase db, char *name, enum resource_type rtype, void *dst)
+{
+ char **sdst = dst;
+ int *idst = dst;
+ float *fdst = dst;
+
+ char fullname[256];
+ char fullclass[256];
+ char *type;
+ XrmValue ret;
+
+ snprintf(fullname, sizeof(fullname), "%s.%s", "slock", name);
+ snprintf(fullclass, sizeof(fullclass), "%s.%s", "Slock", name);
+ fullname[sizeof(fullname) - 1] = fullclass[sizeof(fullclass) - 1] = '\0';
+
+ XrmGetResource(db, fullname, fullclass, &type, &ret);
+ if (ret.addr == NULL || strncmp("String", type, 64))
+ return 1;
+
+ switch (rtype) {
+ case STRING:
+ *sdst = ret.addr;
+ break;
+ case INTEGER:
+ *idst = strtoul(ret.addr, NULL, 10);
+ break;
+ case FLOAT:
+ *fdst = strtof(ret.addr, NULL);
+ break;
+ }
+ return 0;
+}
+
+void
+config_init(Display *dpy)
+{
+ char *resm;
+ XrmDatabase db;
+ ResourcePref *p;
+
+ XrmInitialize();
+ resm = XResourceManagerString(dpy);
+ if (!resm)
+ return;
+
+ db = XrmGetStringDatabase(resm);
+ for (p = resources; p < resources + LEN(resources); p++)
+ resource_load(db, p->name, p->type, p->dst);
+}
+
static void
usage(void)
{
@@ -364,6 +430,8 @@ main(int argc, char **argv) {
if (setuid(duid) < 0)
die("slock: setuid: %s\n", strerror(errno));
+ config_init(dpy);
+
/* check for Xrandr support */
rr.active = XRRQueryExtension(dpy, &rr.evbase, &rr.errbase);
diff --git a/util.h b/util.h
index 6f748b8..148dbc1 100644
--- a/util.h
+++ b/util.h
@@ -1,2 +1,5 @@
+/* macros */
+#define LEN(a) (sizeof(a) / sizeof(a)[0])
+
#undef explicit_bzero
void explicit_bzero(void *, size_t);
--
2.24.0
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