Update the documentation regarding query/restore

[bspwm.git] / bspc.c

diff --git a/bspc.c b/bspc.c
index d861a94d4a72d27f1a0df8851da30c5bc77ed7a9..416edd727a7595991a33eb28c09d24da4ef29721 100644 (file)
--- a/bspc.c
+++ b/bspc.c
@@ -1,48 +1,94 @@
-#include <stdio.h>
+/* Copyright (c) 2012, Bastien Dejean
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
 #include <stdlib.h>
-#include <string.h>
+#ifdef __OpenBSD__
+#include <sys/types.h>
+#endif
 #include <sys/socket.h>
 #include <sys/un.h>
 #include <unistd.h>
+#include <ctype.h>
+#include "helpers.h"
 #include "common.h"
 
 int main(int argc, char *argv[])
 {
-    int sock_fd, nbr, i;
-    struct sockaddr_un sock_address;
-    char socket_path[BUFSIZ];
-    char msg[BUFSIZ];
-    char rsp[BUFSIZ];
+       int fd;
+       struct sockaddr_un sock_address;
+       char msg[BUFSIZ], rsp[BUFSIZ];
 
-    if (argc < 2)
-        return -1;
+       if (argc < 2)
+               err("No arguments given.\n");
 
-    char *sp = getenv(SOCKET_ENV_VAR);
+       sock_address.sun_family = AF_UNIX;
+       char *sp;
 
-    strcpy(socket_path, (sp == NULL ? DEFAULT_SOCKET_PATH : sp));
+       if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
+               err("Failed to create the socket.\n");
 
-    msg[0] = '\0';
+       sp = getenv(SOCKET_ENV_VAR);
+       if (sp != NULL) {
+               snprintf(sock_address.sun_path, sizeof(sock_address.sun_path), "%s", sp);
+       } else {
+               char *host = NULL;
+               int dn = 0, sn = 0;
+               if (xcb_parse_display(NULL, &host, &dn, &sn) != 0)
+                       snprintf(sock_address.sun_path, sizeof(sock_address.sun_path), SOCKET_PATH_TPL, host, dn, sn);
+               free(host);
+       }
 
-    for (i = 1; i < argc; i++) {
-        strcat(msg, argv[i]);
-        if (i < (argc - 1))
-            strcat(msg, TOKEN_SEP);
-    }
+       if (connect(fd, (struct sockaddr *) &sock_address, sizeof(sock_address)) == -1)
+               err("Failed to connect to the socket.\n");
 
-    sock_address.sun_family = AF_UNIX;
-    strcpy(sock_address.sun_path, socket_path);
+       argc--, argv++;
+       int msg_len = 0;
 
-    sock_fd = socket(AF_UNIX, SOCK_STREAM, 0);
-    connect(sock_fd, (struct sockaddr *) &sock_address, sizeof(sock_address));
+       for (int offset = 0, rem = sizeof(msg), n = 0; argc > 0 && rem > 0; offset += n, rem -= n, argc--, argv++) {
+               n = snprintf(msg + offset, rem, "%s%c", *argv, 0);
+               msg_len += n;
+       }
 
-    send(sock_fd, msg, strlen(msg), 0);
+       if (send(fd, msg, msg_len, 0) == -1)
+               err("Failed to send the data.\n");
 
-    if ((nbr = recv(sock_fd, rsp, sizeof(rsp), 0)) > 0) {
-        rsp[nbr] = '\0';
-        if (strcmp(rsp, EMPTY_RESPONSE) != 0)
-            printf("%s", rsp);
-    }
+       int ret = 0, nb;
+       while ((nb = recv(fd, rsp, sizeof(rsp)-1, 0)) > 0) {
+               if (nb == 1 && rsp[0] < MSG_LENGTH) {
+                       ret = rsp[0];
+                       if (ret == MSG_UNKNOWN) {
+                               warn("Unknown command.\n");
+                       } else if (ret == MSG_SYNTAX) {
+                               warn("Invalid syntax.\n");
+                       }
+               } else {
+                       rsp[nb] = '\0';
+                       printf("%s", rsp);
+                       fflush(stdout);
+               }
+       }
 
-    close(sock_fd);
-    return 0;
+       close(fd);
+       return ret;
 }