Small patch to allow environment variables to be changed on the fly when DWM is reloaded.

2 files changed, 30 insertions, 0 deletions

diff --git a/dwm.c b/dwm.c
index cb4113f..8bcd0d2 100644
--- a/dwm.c
+++ b/dwm.c
@@ -43,6 +43,7 @@
 
 #include "drw.h"
 #include "util.h"
+#include "util2.h"
 
 /* macros */
 #define BUTTONMASK              (ButtonPressMask|ButtonReleaseMask)
@@ -2142,6 +2143,11 @@ main(int argc, char *argv[])
 	if (!(dpy = XOpenDisplay(NULL)))
 		die("dwm: cannot open display");
 	checkotherwm();
+
+	FILE *fh;
+	if ((fh = fopen(".env", "r")))
+		readEnv(fh);
+
 	setup();
 #ifdef __OpenBSD__
 	if (pledge("stdio rpath proc exec", NULL) == -1)
diff --git a/util2.h b/util2.h
new file mode 100644
index 0000000..ab25acf
--- /dev/null
+++ b/util2.h
@@ -0,0 +1,24 @@
+#include <stdio.h>
+#include <fcntl.h>
+#include <err.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+int
+readEnv(FILE *fh)
+{
+	int ret;
+	char name[1024], value[8192];
+
+	while (1) {
+		if ((ret = fscanf(fh, "%1023[^=]=%8191[^\n]\n", &name, &value)) == EOF)
+			break;
+		else if (ret == 0)
+			break;
+
+		fprintf(stderr, "Setting: '%s' = '%s'\n", name, value);
+		setenv(name, value, 1);
+	}
+
+	return 0;
+}