nfy

commit eb435af87ca87831003675138764932e9aa2fd12
parent 2ea859e1c31d6071fd9597628f53439b46b679a4
Author: Christos Margiolis <christos@margiolis.net>
Date:   Wed, 27 Jan 2021 16:16:10 +0200

added non-blocking behaviour

Diffstat:
M
README
 | 
4
+++-
M
nfy.1
 | 
17
+++++++++++++++--
M
nfy.c
 | 
14
++++++++++++++

3 files changed, 32 insertions(+), 3 deletions(-)
diff --git a/README b/README
@@ -20,4 +20,6 @@ setup and preferences.
 
 nfy will be installed in /usr/local/bin by default.
 Configuration is done by editing config.h and recompiling
-the source code. Read the manpage for more.
+the source code.
+
+Read the manpage for more.
diff --git a/nfy.1 b/nfy.1
@@ -1,4 +1,4 @@
-.Dd nfy\-VERSRION
+.Dd nfy\-VERSION
 .Dt NFY 1
 .Os
 .Sh NAME
@@ -8,18 +8,31 @@
 .Nm
 .Ar str...
 .Sh DESCRIPTION
+.Pp
 .Nm
 creates a temporary notification popup window and displays
 all the arguments that were passed to it. It uses the
 .Xr Xft 3
 library to render fonts and colors, and
 .Xr Xrandr 3
-to handle screen sizes. All configuration is done by
+to handle screen sizes.
+.Pp
+All configuration is done by
 editing the 'config.h' file in the source code.
 .Sh USAGE
+.Pp
 If the string is not surrounded in quotes,
 .Nm
 will print one line for each word.
+.Pp
+.Nm
+has a non-blocking behaviour, meaning that commands
+coming after it can execute normally without them having
+to wait for 
+.Nm
+to finish first. This is helpful since it's a notification
+program and there's no reason to wait for the notification
+to die off before other commands can execute.
 .Sh SIGNALS
 .Nm
 handles only SIGALRM, SIGTERM and SIGINT. It receives a
diff --git a/nfy.c b/nfy.c
@@ -56,6 +56,7 @@ main(int argc, char *argv[])
         XRRScreenResources *screens;
         XRRCrtcInfo *info = NULL;
         struct sigaction sig;
+        pid_t pid;
         int scr, scrw, scrh;
         int x, y, w, h, th;
         int i, j, len;
@@ -66,6 +67,18 @@ main(int argc, char *argv[])
         if (!(dpy = XOpenDisplay(NULL)))
                 die("cannot open display");
 
+        pid = fork();
+        if (pid < 0)
+                die("fork:");
+        if (pid > 0)
+                exit(EXIT_SUCCESS);
+        umask(0);
+        if (setsid() < 0)
+                die("setsid:");
+        close(STDIN_FILENO);
+        close(STDOUT_FILENO);
+        close(STDERR_FILENO);
+
         scr = DefaultScreen(dpy);
         screens = XRRGetScreenResources(dpy, RootWindow(dpy, scr));
         info = XRRGetCrtcInfo(dpy, screens, screens->crtcs[0]);
@@ -133,6 +146,7 @@ main(int argc, char *argv[])
         sigaction(SIGALRM, &sig, 0);
         sigaction(SIGTERM, &sig, 0);
         sigaction(SIGINT, &sig, 0);
+        /* XXX: replace with just singal? */
 
         if (duration > 0)
                 alarm(duration);