init

5 files changed, 647 insertions, 0 deletions

diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,202 @@
+
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diff --git a/README.md b/README.md
new file mode 100644
index 0000000..7dcd4de
--- /dev/null
+++ b/README.md
@@ -0,0 +1,18 @@
+Simple X hotkey daemon, with a `bind` argument
+
+
+The config file is a script that calls `piss bind` commands. Each bind consists of a key combination in quotes.
+
+Config example:
+```sh
+#!/usr/bin/env sh
+piss bind "Super + Return" "st"
+```
+Or alternatively, in Lua:
+```lua 
+#!/usr/bin/env lua
+os.execute('piss bind "Super + Return" "st"')
+```
+
+The daemon automatically detects the shebang and executes your config!
+My config can be seen [here.](pissrc.example.lua)
diff --git a/makefile b/makefile
new file mode 100644
index 0000000..6fbd1c1
--- /dev/null
+++ b/makefile
@@ -0,0 +1,31 @@
+PREFIX = /usr/local
+
+X11INC = /usr/X11R6/include
+X11LIB = /usr/X11R6/lib
+
+INCS = -I$(X11INC)
+LIBS = -L$(X11LIB) -lX11
+
+CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_POSIX_C_SOURCE=200809L
+CFLAGS   = -std=c99 -pedantic -Wall -Wextra -Os $(INCS) $(CPPFLAGS)
+LDFLAGS  = $(LIBS)
+
+CC = cc
+
+all: piss
+
+piss: src/daemon.c
+	$(CC) $(CFLAGS) -o piss src/daemon.c $(LDFLAGS)
+
+clean:
+	rm -f piss
+
+install: all
+	mkdir -p $(DESTDIR)$(PREFIX)/bin
+	cp -f piss $(DESTDIR)$(PREFIX)/bin
+	chmod 755 $(DESTDIR)$(PREFIX)/bin/piss
+
+uninstall:
+	rm -f $(DESTDIR)$(PREFIX)/bin/piss
+
+.PHONY: all clean install uninstall
diff --git a/pissrc.example.lua b/pissrc.example.lua
new file mode 100755
index 0000000..3097c79
--- /dev/null
+++ b/pissrc.example.lua
@@ -0,0 +1,47 @@
+#!/usr/bin/lua
+
+-- NOTE THAT THE CONFIG DOES __NOT__ HAVE TO BE IN LUA. Do whatever you want!
+
+local function bind(key, cmd)
+	os.execute(string.format('piss bind "%s" "%s"', key, cmd))
+end
+
+bind("Super + Ctrl + l", "slock")
+bind("Super + Return", "st")
+bind("Super + s", "bspc node -c")
+bind("Super + Ctrl + r", "bspc wm -r")
+
+for _, dir in ipairs({
+	{ "h", "west" },
+	{ "j", "south" },
+	{ "k", "north" },
+	{ "l", "east" }
+}) do
+	bind("Super + " .. dir[1], "bspc node -f " .. dir[2])
+end
+
+for _, dir in ipairs({
+	{ "h", "west" },
+	{ "j", "south" },
+	{ "k", "north" },
+	{ "l", "east" }
+}) do
+	bind("Super + Shift + " .. dir[1], "bspc node -s " .. dir[2])
+end
+
+bind("Super + p", "pkill picom && picom --backend glx & disown")
+bind("Super + Shift + p", "pkill piss && piss ~/.config/piss/pissrc & disown")
+
+local desktops = { "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX" }
+for i = 1, 9 do
+	bind("Super + " .. i, "bspc desktop -f " .. desktops[i])
+	bind("Super + Shift + " .. i, "bspc node -d " .. desktops[i])
+end
+
+bind("Super + r", "rofi -show drun -config ~/.config/rofi/gruvbox.rasi")
+bind("Super + Shift + Return", "rofi -show run -config ~/.config/rofi/gruvbox.rasi")
+bind("Super + Shift + q", "bspc quit")
+bind("Super + Shift + s", "flameshot gui")
+bind("Super + f", "pcmanfm")
+bind("Super + space", "bspc node -t floating")
+bind("Super + Shift + space", "bspc node -t tiled")
diff --git a/src/daemon.c b/src/daemon.c
new file mode 100644
index 0000000..40ed473
--- /dev/null
+++ b/src/daemon.c
@@ -0,0 +1,349 @@
+#include <X11/XKBlib.h>
+#include <X11/Xlib.h>
+#include <X11/keysym.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#define MAX_BINDS 256
+#define MAX_CMD_LEN 512
+#define SOCK_PATH "/tmp/piss.sock"
+
+typedef struct {
+  unsigned int mod;
+  KeySym keysym;
+  char cmd[MAX_CMD_LEN];
+} Binding;
+
+static Display *dpy;
+static Window root;
+static Binding bindings[MAX_BINDS];
+static int bind_count = 0;
+
+unsigned int parse_modifiers(const char *mod_str) {
+  unsigned int mod = 0;
+  char *str = strdup(mod_str);
+  char *token = strtok(str, "+");
+
+  while (token) {
+    while (*token == ' ')
+      token++;
+    char *end = token + strlen(token) - 1;
+    while (end > token && *end == ' ')
+      end--;
+    *(end + 1) = '\0';
+
+    if (strcasecmp(token, "super") == 0 || strcasecmp(token, "mod4") == 0)
+      mod |= Mod4Mask;
+    else if (strcasecmp(token, "shift") == 0)
+      mod |= ShiftMask;
+    else if (strcasecmp(token, "ctrl") == 0 ||
+             strcasecmp(token, "control") == 0)
+      mod |= ControlMask;
+    else if (strcasecmp(token, "alt") == 0 || strcasecmp(token, "mod1") == 0)
+      mod |= Mod1Mask;
+
+    token = strtok(NULL, "+");
+  }
+
+  free(str);
+  return mod;
+}
+
+KeySym parse_key(const char *key_str) {
+  char *str = strdup(key_str);
+  char *s = str;
+  while (*s == ' ')
+    s++;
+  char *end = s + strlen(s) - 1;
+  while (end > s && *end == ' ')
+    end--;
+  *(end + 1) = '\0';
+
+  KeySym ks = XStringToKeysym(s);
+  free(str);
+  return ks;
+}
+
+void add_binding(const char *keycombo, const char *cmd) {
+  if (bind_count >= MAX_BINDS) {
+    fprintf(stderr, "piss: max bindings reached\n");
+    return;
+  }
+
+  char *combo = strdup(keycombo);
+  char *end = combo + strlen(combo) - 1;
+  while (end > combo && (*end == ' ' || *end == '\t' || *end == '\n')) {
+    *end = '\0';
+    end--;
+  }
+
+  char *plus = strrchr(combo, '+');
+
+  if (!plus) {
+    fprintf(stderr, "piss: invalid key combo: %s\n", keycombo);
+    free(combo);
+    return;
+  }
+
+  *plus = '\0';
+  char *mod_str = combo;
+  char *key_str = plus + 1;
+
+  bindings[bind_count].mod = parse_modifiers(mod_str);
+  bindings[bind_count].keysym = parse_key(key_str);
+
+  if (bindings[bind_count].keysym == NoSymbol) {
+    fprintf(stderr, "piss: invalid key: %s (from %s)\n", key_str, keycombo);
+    free(combo);
+    return;
+  }
+
+  strncpy(bindings[bind_count].cmd, cmd, MAX_CMD_LEN - 1);
+  bindings[bind_count].cmd[MAX_CMD_LEN - 1] = '\0';
+
+  KeyCode kc = XKeysymToKeycode(dpy, bindings[bind_count].keysym);
+  if (kc != 0) {
+    XSync(dpy, False);
+
+    XGrabKey(dpy, kc, bindings[bind_count].mod, root, True, GrabModeAsync,
+             GrabModeAsync);
+    XGrabKey(dpy, kc, bindings[bind_count].mod | Mod2Mask, root, True,
+             GrabModeAsync, GrabModeAsync);
+    XGrabKey(dpy, kc, bindings[bind_count].mod | LockMask, root, True,
+             GrabModeAsync, GrabModeAsync);
+    XGrabKey(dpy, kc, bindings[bind_count].mod | Mod2Mask | LockMask, root,
+             True, GrabModeAsync, GrabModeAsync);
+
+    XSync(dpy, False);
+
+    fprintf(stderr, "piss: bound [%s] keysym=%lu keycode=%u mod=%u -> %s\n",
+            keycombo, bindings[bind_count].keysym, kc, bindings[bind_count].mod,
+            cmd);
+
+    bind_count++;
+  } else {
+    fprintf(stderr, "piss: couldn't get keycode for: %s\n", keycombo);
+  }
+
+  free(combo);
+}
+
+void execute_command(const char *cmd) {
+  if (fork() == 0) {
+    setsid();
+    execl("/bin/sh", "sh", "-c", cmd, NULL);
+    exit(0);
+  }
+}
+
+void handle_keypress(XEvent *ev) {
+  XKeyEvent *e = &ev->xkey;
+  KeySym ks = XkbKeycodeToKeysym(dpy, e->keycode, 0, 0);
+  unsigned int cleanmask = e->state & ~(Mod2Mask | LockMask);
+
+  fprintf(stderr, "piss: key pressed: keysym=%lu mod=%u\n", ks, cleanmask);
+
+  for (int i = 0; i < bind_count; i++) {
+    if (bindings[i].keysym == ks && bindings[i].mod == cleanmask) {
+      fprintf(stderr, "piss: executing: %s\n", bindings[i].cmd);
+      execute_command(bindings[i].cmd);
+      break;
+    }
+  }
+}
+
+char *get_default_config() {
+  static char path[512];
+  const char *home = getenv("HOME");
+  if (!home) {
+    struct passwd *pw = getpwuid(getuid());
+    home = pw->pw_dir;
+  }
+  snprintf(path, sizeof(path), "%s/.config/piss/pissrc", home);
+  return path;
+}
+
+int send_bind_to_daemon(const char *keycombo, const char *cmd) {
+  int sock;
+  struct sockaddr_un addr;
+  char msg[MAX_CMD_LEN * 2];
+
+  sock = socket(AF_UNIX, SOCK_STREAM, 0);
+  if (sock < 0) {
+    return 1;
+  }
+
+  memset(&addr, 0, sizeof(addr));
+  addr.sun_family = AF_UNIX;
+  strncpy(addr.sun_path, SOCK_PATH, sizeof(addr.sun_path) - 1);
+
+  if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+    close(sock);
+    return 1;
+  }
+
+  snprintf(msg, sizeof(msg), "%s|||%s", keycombo, cmd);
+  write(sock, msg, strlen(msg));
+  close(sock);
+  return 0;
+}
+
+void handle_socket_connection(int client_sock) {
+  char buf[MAX_CMD_LEN * 2];
+  int n = read(client_sock, buf, sizeof(buf) - 1);
+  if (n > 0) {
+    buf[n] = '\0';
+
+    char *sep = strstr(buf, "|||");
+    if (sep) {
+      *sep = '\0';
+      char *keycombo = buf;
+      char *cmd = sep + 3;
+      add_binding(keycombo, cmd);
+    }
+  }
+  close(client_sock);
+}
+
+int main(int argc, char *argv[]) {
+  if (argc >= 4 && strcmp(argv[1], "bind") == 0) {
+    return send_bind_to_daemon(argv[2], argv[3]);
+  }
+
+  char *config = (argc >= 2) ? argv[1] : get_default_config();
+
+  dpy = XOpenDisplay(NULL);
+  if (!dpy) {
+    fprintf(stderr, "piss: cannot open display\n");
+    return 1;
+  }
+
+  root = DefaultRootWindow(dpy);
+
+  int sock, client_sock;
+  struct sockaddr_un addr;
+
+  unlink(SOCK_PATH);
+  sock = socket(AF_UNIX, SOCK_STREAM, 0);
+  if (sock < 0) {
+    perror("socket");
+    return 1;
+  }
+
+  memset(&addr, 0, sizeof(addr));
+  addr.sun_family = AF_UNIX;
+  strncpy(addr.sun_path, SOCK_PATH, sizeof(addr.sun_path) - 1);
+
+  if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+    perror("bind");
+    return 1;
+  }
+
+  if (listen(sock, 5) < 0) {
+    perror("listen");
+    return 1;
+  }
+
+  char piss_path[512];
+  ssize_t len = readlink("/proc/self/exe", piss_path, sizeof(piss_path) - 1);
+  if (len != -1) {
+    piss_path[len] = '\0';
+    setenv("PISS_BIN", piss_path, 1);
+  }
+
+  pid_t config_pid = fork();
+  if (config_pid == 0) {
+    usleep(50000);
+
+    FILE *f = fopen(config, "r");
+    if (f) {
+      char line[256];
+      if (fgets(line, sizeof(line), f) && strncmp(line, "#!", 2) == 0) {
+        fclose(f);
+        execl(config, config, NULL);
+      } else {
+        fclose(f);
+        execl("/bin/sh", "sh", config, NULL);
+      }
+    }
+
+    perror("execl");
+    exit(1);
+  }
+
+  fd_set readfds;
+  struct timeval tv;
+  int status;
+
+  while (waitpid(config_pid, &status, WNOHANG) == 0) {
+    FD_ZERO(&readfds);
+    FD_SET(sock, &readfds);
+    tv.tv_sec = 0;
+    tv.tv_usec = 50000;
+
+    if (select(sock + 1, &readfds, NULL, NULL, &tv) > 0) {
+      client_sock = accept(sock, NULL, NULL);
+      if (client_sock >= 0) {
+        handle_socket_connection(client_sock);
+      }
+    }
+  }
+
+  for (int i = 0; i < 5; i++) {
+    FD_ZERO(&readfds);
+    FD_SET(sock, &readfds);
+    tv.tv_sec = 0;
+    tv.tv_usec = 10000;
+
+    if (select(sock + 1, &readfds, NULL, NULL, &tv) > 0) {
+      client_sock = accept(sock, NULL, NULL);
+      if (client_sock >= 0) {
+        handle_socket_connection(client_sock);
+      }
+    }
+  }
+
+  XSelectInput(dpy, root, KeyPressMask);
+
+  printf("piss: running with %d bindings\n", bind_count);
+
+  int x11_fd = ConnectionNumber(dpy);
+
+  fprintf(stderr, "piss: listening for keypresses (X11 fd=%d)...\n", x11_fd);
+
+  while (1) {
+    FD_ZERO(&readfds);
+    FD_SET(x11_fd, &readfds);
+    FD_SET(sock, &readfds);
+    int max_fd = (x11_fd > sock) ? x11_fd : sock;
+
+    if (select(max_fd + 1, &readfds, NULL, NULL, NULL) > 0) {
+      if (FD_ISSET(x11_fd, &readfds)) {
+        while (XPending(dpy)) {
+          XEvent ev;
+          XNextEvent(dpy, &ev);
+          fprintf(stderr, "piss: received X event type=%d\n", ev.type);
+          if (ev.type == KeyPress)
+            handle_keypress(&ev);
+        }
+      }
+
+      if (FD_ISSET(sock, &readfds)) {
+        client_sock = accept(sock, NULL, NULL);
+        if (client_sock >= 0) {
+          handle_socket_connection(client_sock);
+        }
+      }
+    }
+  }
+
+  unlink(SOCK_PATH);
+  XCloseDisplay(dpy);
+  return 0;
+}