324 lines
7.0 KiB
C
324 lines
7.0 KiB
C
/* Copyright (c) 2012, Bastien Dejean
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define RUNTIME_DIR_ENV "XDG_RUNTIME_DIR"
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#define SOCKET_PATH_TPL "/tmp/bspwm%s_%i_%i-socket"
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#define SOCKET_ENV_VAR "BSPWM_SOCKET"
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#define FAILURE_MESSAGE "\x07"
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <stdarg.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <xcb/xcb.h>
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#include <poll.h>
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#include <unistd.h>
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#include <string.h>
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#include <fcntl.h>
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#include <ctype.h>
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/* prototypes */
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void warn(char *fmt, ...);
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void err(char *fmt, ...);
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char *read_string(const char *file_path, size_t *tlen);
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char *copy_string(char *str, size_t len);
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char *mktempfifo(const char *template);
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int asprintf(char **buf, const char *fmt, ...);
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int vasprintf(char **buf, const char *fmt, va_list args);
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bool is_hex_color(const char *color);
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void warn(char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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}
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__attribute__((noreturn))
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void err(char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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exit(EXIT_FAILURE);
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}
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char *read_string(const char *file_path, size_t *tlen)
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{
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if (file_path == NULL) {
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return NULL;
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}
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int fd = open(file_path, O_RDONLY);
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if (fd == -1) {
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perror("Read file: open");
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return NULL;
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}
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char buf[BUFSIZ], *content = NULL;
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size_t len = sizeof(buf);
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if ((content = calloc(len, sizeof(char))) == NULL) {
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perror("Read file: calloc");
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goto end;
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}
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int nb;
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*tlen = 0;
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while (true) {
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nb = read(fd, buf, sizeof(buf));
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if (nb < 0) {
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perror("Restore tree: read");
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free(content);
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content = NULL;
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goto end;
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} else if (nb == 0) {
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break;
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} else {
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*tlen += nb;
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if (*tlen > len) {
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len *= 2;
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char *rcontent = realloc(content, len * sizeof(char));
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if (rcontent == NULL) {
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perror("Read file: realloc");
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free(content);
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content = NULL;
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goto end;
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} else {
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content = rcontent;
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}
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}
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strncpy(content + (*tlen - nb), buf, nb);
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}
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}
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end:
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close(fd);
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return content;
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}
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char *copy_string(char *str, size_t len)
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{
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char *cpy = calloc(1, ((len+1) * sizeof(char)));
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if (cpy == NULL) {
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perror("Copy string: callow");
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return NULL;
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}
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strncpy(cpy, str, len);
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cpy[len] = '\0';
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return cpy;
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}
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char *mktempfifo(const char *template)
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{
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int tempfd;
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char *runtime_dir = getenv(RUNTIME_DIR_ENV);
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if (runtime_dir == NULL) {
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runtime_dir = "/tmp";
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}
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char *fifo_path = malloc(strlen(runtime_dir)+1+strlen(template)+1);
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if (fifo_path == NULL) {
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return NULL;
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}
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sprintf(fifo_path, "%s/%s", runtime_dir, template);
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if ((tempfd = mkstemp(fifo_path)) == -1) {
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free(fifo_path);
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return NULL;
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}
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close(tempfd);
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unlink(fifo_path);
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if (mkfifo(fifo_path, 0666) == -1) {
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free(fifo_path);
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return NULL;
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}
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return fifo_path;
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}
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int asprintf(char **buf, const char *fmt, ...)
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{
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int size = 0;
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va_list args;
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va_start(args, fmt);
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size = vasprintf(buf, fmt, args);
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va_end(args);
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return size;
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}
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int vasprintf(char **buf, const char *fmt, va_list args)
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{
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va_list tmp;
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va_copy(tmp, args);
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int size = vsnprintf(NULL, 0, fmt, tmp);
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va_end(tmp);
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if (size < 0) {
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return -1;
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}
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*buf = malloc(size + 1);
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if (*buf == NULL) {
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return -1;
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}
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size = vsprintf(*buf, fmt, args);
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return size;
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}
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bool is_hex_color(const char *color)
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{
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if (color[0] != '#' || strlen(color) != 7) {
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return false;
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}
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for (int i = 1; i < 7; i++) {
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if (!isxdigit(color[i])) {
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return false;
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}
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}
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return true;
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}
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char *send_msg_to_bspwm(char *args[], int count)
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{
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int sock_fd;
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struct sockaddr_un sock_address;
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char msg[BUFSIZ];
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static char rsp[BUFSIZ];
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sock_address.sun_family = AF_UNIX;
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char *sp;
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if ((sock_fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
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err("Failed to create the socket.\n");
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}
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sp = getenv(SOCKET_ENV_VAR);
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if (sp != NULL) {
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snprintf(sock_address.sun_path, sizeof(sock_address.sun_path), "%s", sp);
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} else {
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char *host = NULL;
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int dn = 0, sn = 0;
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if (xcb_parse_display(NULL, &host, &dn, &sn) != 0) {
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snprintf(sock_address.sun_path, sizeof(sock_address.sun_path), SOCKET_PATH_TPL, host, dn, sn);
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}
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free(host);
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}
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if (connect(sock_fd, (struct sockaddr *) &sock_address, sizeof(sock_address)) == -1) {
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err("Failed to connect to the socket.\n");
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}
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int msg_len = 0;
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for (int offset = 0, rem = sizeof(msg), n = 0; count > 0 && rem > 0; offset += n, rem -= n, count--, args++) {
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n = snprintf(msg + offset, rem, "%s%c", *args, 0);
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msg_len += n;
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}
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if (send(sock_fd, msg, msg_len, 0) == -1) {
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err("Failed to send the data.\n");
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}
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int nb;
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struct pollfd fds[] = {
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{sock_fd, POLLIN, 0},
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{STDOUT_FILENO, POLLHUP, 0},
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};
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while (poll(fds, 2, -1) > 0) {
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if (fds[0].revents & POLLIN) {
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if ((nb = recv(sock_fd, rsp, sizeof(rsp)-1, 0)) > 0) {
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rsp[nb] = '\0';
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return rsp;
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} else {
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break;
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}
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}
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if (fds[1].revents & (POLLERR | POLLHUP)) {
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break;
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}
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}
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close(sock_fd);
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return NULL;
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}
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int main(void) {
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char final[64], current[2];
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char *occupied[] = {"query", "-D", "-d", ".occupied", "--names"};
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char *focused[] = {"query", "-D", "-d", ".focused", "--names"};
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char *result;
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int count = 5;
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result = send_msg_to_bspwm(occupied, count);
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if(!result) {
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printf("error: sending message to bspwm failed!\n");
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return 1;
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}
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memcpy(&final, result, 64);
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result = send_msg_to_bspwm(focused, count);
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if(!result) {
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printf("error: sending message to bspwm failed!\n");
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return 1;
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}
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memcpy(¤t, result, 2);
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current[1] = '\0';
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for(int i = 0; i < 64; i++) {
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if(final[i] == '\0') {
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/* XXX: susceptible to buffer underflow */
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if (i) final[i - 1] = '\0';
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break;
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}
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if(isdigit(final[i]) && *current == final[i])
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/* XXX: susceptible to buffer overflow */
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final[i + 1] = '<';
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if(final[i] == '\n')
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final[i] = ' ';
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}
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printf("%s", final);
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return 0;
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}
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