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Marcin Woźniak 1 year ago
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Signed by: y0rune GPG Key ID: F204C385F57EB348
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  1. 53
      .gitignore
  2. 3
      FUNDING.yml
  3. 339
      LICENSE
  4. 19
      Makefile
  5. 46
      README.md
  6. 22
      config.h
  7. 241
      dwmblocks.c
  8. 77
      patches/dwmblocks-statuscmd-fork.diff
  9. 93
      patches/dwmblocks-statuscmd-signal.diff

53
.gitignore
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# Prerequisites
*.d
# Object files
*.o
*.ko
*.obj
*.elf
# Linker output
*.ilk
*.map
*.exp
# Precompiled Headers
*.gch
*.pch
# Libraries
*.lib
*.a
*.la
*.lo
# Shared objects (inc. Windows DLLs)
*.dll
*.so
*.so.*
*.dylib
# Executables
*.exe
*.out
*.app
*.i*86
*.x86_64
*.hex
dwmblocks
# Debug files
*.dSYM/
*.su
*.idb
*.pdb
# Kernel Module Compile Results
*.mod*
*.cmd
.tmp_versions/
modules.order
Module.symvers
Mkfile.old
dkms.conf

3
FUNDING.yml
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github: lukesmithxyz
custom: ["https://lukesmith.xyz/donate", "https://paypal.me/lukemsmith", "https://lukesmith.xyz/crypto"]
patreon: lukesmith

339
LICENSE
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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
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Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
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Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
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The hypothetical commands `show w' and `show c' should show the appropriate
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You should also get your employer (if you work as a programmer) or your
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Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
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consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.

19
Makefile
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.POSIX:
PREFIX = /usr/local
CC = gcc
dwmblocks: dwmblocks.o
$(CC) dwmblocks.o -lX11 -o dwmblocks
dwmblocks.o: dwmblocks.c config.h
$(CC) -c dwmblocks.c
clean:
rm -f *.o *.gch dwmblocks
install: dwmblocks
mkdir -p $(DESTDIR)$(PREFIX)/bin
cp -f dwmblocks $(DESTDIR)$(PREFIX)/bin
chmod 755 $(DESTDIR)$(PREFIX)/bin/dwmblocks
uninstall:
rm -f $(DESTDIR)$(PREFIX)/bin/dwmblocks
.PHONY: clean install uninstall

46
README.md
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# THANK YOU LUKE FOR YOUR HARD WORK
# dwmblocks
Modular status bar for dwm written in c.
# Modifying blocks
The statusbar is made from text output from commandline programs. Blocks are
added and removed by editing the config.h file.
# Luke's build
I have dwmblocks read my preexisting scripts
[here in my dotfiles repo](https://github.com/LukeSmithxyz/voidrice/tree/master/.local/bin/statusbar).
So if you want my build out of the box, download those and put them in your
`$PATH`. I do this to avoid redundancy in LARBS, both i3 and dwm use the same
statusbar scripts.
# Signaling changes
Most statusbars constantly rerun every script every several seconds to update.
This is an option here, but a superior choice is giving your module a signal
that you can signal to it to update on a relevant event, rather than having it
rerun idly.
For example, the audio module has the update signal 10 by default. Thus,
running `pkill -RTMIN+10 dwmblocks` will update it.
You can also run `kill -44 $(pidof dwmblocks)` which will have the same effect,
but is faster. Just add 34 to your typical signal number.
My volume module *never* updates on its own, instead I have this command run
along side my volume shortcuts in dwm to only update it when relevant.
Note that all modules must have different signal numbers.
# Clickable modules
Like i3blocks, this build allows you to build in additional actions into your
scripts in response to click events. See the above linked scripts for examples
of this using the `$BLOCK_BUTTON` variable.
For this feature to work, you need the appropriate patch in dwm as well. See
[here](https://dwm.suckless.org/patches/statuscmd/).
Credit for those patches goes to Daniel Bylinka (daniel.bylinka@gmail.com).

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config.h
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//Modify this file to change what commands output to your statusbar, and recompile using the make command.
static const Block blocks[] = {
/*Icon*/ /*Command*/ /*Update Interval*/ /*Update Signal*/
{"", "sb-music", 0, 11},
{"", "sb-temp", 60, 14},
{"", "sb-weather", 18000, 5},
{"", "sb-mail", 180, 12},
{"", "sb-cpu", 10, 13},
{"", "sb-mem", 10, 20},
{"", "sb-network", 5, 4},
{"", "sb-battery", 5, 3},
{"", "sb-volume", 0, 10},
{"", "sb-clock", 30, 1},
};
//Sets delimiter between status commands. NULL character ('\0') means no delimiter.
static char *delim = " ";
// Have dwmblocks automatically recompile and run when you edit this file in
// vim with the following line in your vimrc/init.vim:
// autocmd BufWritePost ~/.local/src/dwmblocks/config.h !cd ~/.local/src/dwmblocks/; sudo make install && { killall -q dwmblocks;setsid dwmblocks & }

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dwmblocks.c
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#include<stdlib.h>
#include<stdio.h>
#include<string.h>
#include<unistd.h>
#include<signal.h>
#include<X11/Xlib.h>
#define LENGTH(X) (sizeof(X) / sizeof (X[0]))
#define CMDLENGTH 50
typedef struct {
char* icon;
char* command;
unsigned int interval;
unsigned int signal;
} Block;
void sighandler(int num);
void buttonhandler(int sig, siginfo_t *si, void *ucontext);
void replace(char *str, char old, char new);
void remove_all(char *str, char to_remove);
void getcmds(int time);
#ifndef __OpenBSD__
void getsigcmds(int signal);
void setupsignals();
void sighandler(int signum);
#endif
int getstatus(char *str, char *last);
void setroot();
void statusloop();
void termhandler(int signum);
#include "config.h"
static Display *dpy;
static int screen;
static Window root;
static char statusbar[LENGTH(blocks)][CMDLENGTH] = {0};
static char statusstr[2][256];
static int statusContinue = 1;
static void (*writestatus) () = setroot;
void replace(char *str, char old, char new)
{
int N = strlen(str);
for(int i = 0; i < N; i++)
if(str[i] == old)
str[i] = new;
}
void remove_all(char *str, char to_remove) {
char *read = str;
char *write = str;
while (*read) {
if (*read == to_remove) {
read++;
*write = *read;
}
read++;
write++;
}
}
//opens process *cmd and stores output in *output
void getcmd(const Block *block, char *output)
{
if (block->signal)
{
output[0] = block->signal;
output++;
}
strcpy(output, block->icon);
char *cmd = block->command;
FILE *cmdf = popen(cmd,"r");
if (!cmdf)
return;
char c;
int i = strlen(block->icon);
fgets(output+i, CMDLENGTH-(strlen(delim)+1), cmdf);
remove_all(output, '\n');
i = strlen(output);
if ((i > 0 && block != &blocks[LENGTH(blocks) - 1]))
strcat(output, delim);
i+=strlen(delim);
output[i++] = '\0';
pclose(cmdf);
}
void getcmds(int time)
{
const Block* current;
for(int i = 0; i < LENGTH(blocks); i++)
{
current = blocks + i;
if ((current->interval != 0 && time % current->interval == 0) || time == -1)
getcmd(current,statusbar[i]);
}
}
#ifndef __OpenBSD__
void getsigcmds(int signal)
{
const Block *current;
for (int i = 0; i < LENGTH(blocks); i++)
{
current = blocks + i;
if (current->signal == signal)
getcmd(current,statusbar[i]);
}
}
void setupsignals()
{
struct sigaction sa;
for(int i = SIGRTMIN; i <= SIGRTMAX; i++)
signal(i, SIG_IGN);
for(int i = 0; i < LENGTH(blocks); i++)
{
if (blocks[i].signal > 0)
{
signal(SIGRTMIN+blocks[i].signal, sighandler);
sigaddset(&sa.sa_mask, SIGRTMIN+blocks[i].signal);
}
}
sa.sa_sigaction = buttonhandler;
sa.sa_flags = SA_SIGINFO;
sigaction(SIGUSR1, &sa, NULL);
struct sigaction sigchld_action = {
.sa_handler = SIG_DFL,
.sa_flags = SA_NOCLDWAIT
};
sigaction(SIGCHLD, &sigchld_action, NULL);
}
#endif
int getstatus(char *str, char *last)
{
strcpy(last, str);
str[0] = '\0';
for(int i = 0; i < LENGTH(blocks); i++) {
strcat(str, statusbar[i]);
if (i == LENGTH(blocks) - 1)
strcat(str, " ");
}
str[strlen(str)-1] = '\0';
return strcmp(str, last);//0 if they are the same
}
void setroot()
{
if (!getstatus(statusstr[0], statusstr[1]))//Only set root if text has changed.
return;
Display *d = XOpenDisplay(NULL);
if (d) {
dpy = d;
}
screen = DefaultScreen(dpy);
root = RootWindow(dpy, screen);
XStoreName(dpy, root, statusstr[0]);
XCloseDisplay(dpy);
}
void pstdout()
{
if (!getstatus(statusstr[0], statusstr[1]))//Only write out if text has changed.
return;
printf("%s\n",statusstr[0]);
fflush(stdout);
}
void statusloop()
{
#ifndef __OpenBSD__
setupsignals();
#endif
int i = 0;
getcmds(-1);
while(statusContinue)
{
getcmds(i);
writestatus();
sleep(1.0);
i++;
}
}
#ifndef __OpenBSD__
void sighandler(int signum)
{
getsigcmds(signum-SIGRTMIN);
writestatus();
}
void buttonhandler(int sig, siginfo_t *si, void *ucontext)
{
char button[2] = {'0' + si->si_value.sival_int & 0xff, '\0'};
pid_t process_id = getpid();
sig = si->si_value.sival_int >> 8;
if (fork() == 0)
{
const Block *current;
for (int i = 0; i < LENGTH(blocks); i++)
{
current = blocks + i;
if (current->signal == sig)
break;
}
char shcmd[1024];
sprintf(shcmd,"%s && kill -%d %d",current->command, current->signal+34,process_id);
char *command[] = { "/bin/sh", "-c", shcmd, NULL };
setenv("BLOCK_BUTTON", button, 1);
setsid();
execvp(command[0], command);
exit(EXIT_SUCCESS);
}
}
#endif
void termhandler(int signum)
{
statusContinue = 0;
exit(0);
}
int main(int argc, char** argv)
{
for(int i = 0; i < argc; i++)
{
if (!strcmp("-d",argv[i]))
delim = argv[++i];
else if(!strcmp("-p",argv[i]))
writestatus = pstdout;
}
signal(SIGTERM, termhandler);
signal(SIGINT, termhandler);
statusloop();
}

77
patches/dwmblocks-statuscmd-fork.diff
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diff --git a/dwmblocks.c b/dwmblocks.c
index 7d7a564..e2c5dd0 100644
--- a/dwmblocks.c
+++ b/dwmblocks.c
@@ -34,8 +34,6 @@ static int screen;
static Window root;
static char statusbar[LENGTH(blocks)][CMDLENGTH] = {0};
static char statusstr[2][256];
-static char exportstring[CMDLENGTH + 22] = "export BLOCK_BUTTON=-;";
-static int button = 0;
static int statusContinue = 1;
static void (*writestatus) () = setroot;
@@ -55,21 +53,8 @@ void getcmd(const Block *block, char *output)
output[0] = block->signal;
output++;
}
- char* cmd;
- FILE *cmdf;
- if (button)
- {
- cmd = strcat(exportstring, block->command);
- cmd[20] = '0' + button;
- button = 0;
- cmdf = popen(cmd,"r");
- cmd[22] = '\0';
- }
- else
- {
- cmd = block->command;
- cmdf = popen(cmd,"r");
- }
+ char *cmd = block->command;
+ FILE *cmdf = popen(cmd,"r");
if (!cmdf)
return;
fgets(output, CMDLENGTH, cmdf);
@@ -117,6 +102,7 @@ void setupsignals()
sa.sa_sigaction = buttonhandler;
sa.sa_flags = SA_SIGINFO;
sigaction(SIGUSR1, &sa, NULL);
+ signal(SIGCHLD, SIG_IGN);
}
#endif
@@ -179,9 +165,29 @@ void sighandler(int signum)
void buttonhandler(int sig, siginfo_t *si, void *ucontext)
{
- button = si->si_value.sival_int & 0xff;
- getsigcmds(si->si_value.sival_int >> 8);
+ int button = si->si_value.sival_int & 0xff;
+ sig = si->si_value.sival_int >> 8;
+ getsigcmds(sig);
writestatus();
+ if (fork() == 0)
+ {
+ static char exportstring[CMDLENGTH + 22] = "export BLOCK_BUTTON=-;";
+ const Block *current;
+ int i;
+ for (i = 0; i < LENGTH(blocks); i++)
+ {
+ current = blocks + i;
+ if (current->signal == sig)
+ break;
+ }
+ char *cmd = strcat(exportstring, blocks[i].command);
+ cmd[20] = '0' + button;
+ char *command[] = { "/bin/sh", "-c", cmd, NULL };
+ setsid();
+ execvp(command[0], command);
+ exit(EXIT_SUCCESS);
+ cmd[22] = '\0';
+ }
}
#endif

93
patches/dwmblocks-statuscmd-signal.diff
View File

@ -0,0 +1,93 @@
diff --git a/dwmblocks.c b/dwmblocks.c
index 88bdfb0..7bd14df 100644
--- a/dwmblocks.c
+++ b/dwmblocks.c
@@ -14,6 +14,7 @@ typedef struct {
unsigned int signal;
} Block;
void sighandler(int num);
+void buttonhandler(int sig, siginfo_t *si, void *ucontext);
void replace(char *str, char old, char new);
void getcmds(int time);
#ifndef __OpenBSD__
@@ -34,6 +35,8 @@ static int screen;
static Window root;
static char statusbar[LENGTH(blocks)][CMDLENGTH] = {0};
static char statusstr[2][256];
+static char exportstring[CMDLENGTH + 16] = "export BUTTON=-;";
+static int button = 0;
static int statusContinue = 1;
static void (*writestatus) () = setroot;
@@ -48,16 +51,34 @@ void replace(char *str, char old, char new)
//opens process *cmd and stores output in *output
void getcmd(const Block *block, char *output)
{
+ if (block->signal)
+ {
+ output[0] = block->signal;
+ output++;
+ }
strcpy(output, block->icon);
- char *cmd = block->command;
- FILE *cmdf = popen(cmd,"r");
+ char* cmd;
+ FILE *cmdf;
+ if (button)
+ {
+ cmd = strcat(exportstring, block->command);
+ cmd[14] = '0' + button;
+ button = 0;
+ cmdf = popen(cmd,"r");
+ cmd[16] = '\0';
+ }
+ else
+ {
+ cmd = block->command;
+ cmdf = popen(cmd,"r");
+ }
if (!cmdf)
return;
char c;
int i = strlen(block->icon);
fgets(output+i, CMDLENGTH-i, cmdf);
i = strlen(output);
- if (delim != '\0' && --i)
+ if (delim != '\0' && i)
output[i++] = delim;
output[i++] = '\0';
pclose(cmdf);
@@ -88,11 +106,18 @@ void getsigcmds(int signal)
void setupsignals()
{
+ struct sigaction sa;
for(int i = 0; i < LENGTH(blocks); i++)
{
if (blocks[i].signal > 0)
+ {
signal(SIGRTMIN+blocks[i].signal, sighandler);
+ sigaddset(&sa.sa_mask, SIGRTMIN+blocks[i].signal);
+ }
}
+ sa.sa_sigaction = buttonhandler;
+ sa.sa_flags = SA_SIGINFO;
+ sigaction(SIGUSR1, &sa, NULL);
}
#endif
@@ -152,6 +177,14 @@ void sighandler(int signum)
getsigcmds(signum-SIGRTMIN);
writestatus();
}
+
+void buttonhandler(int sig, siginfo_t *si, void *ucontext)
+{
+ button = si->si_value.sival_int & 0xff;
+ getsigcmds(si->si_value.sival_int >> 8);
+ writestatus();
+}
+
#endif
void termhandler(int signum)
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