client/server: add -t,--term to footclient

client.c

@@ -30,7 +30,8 @@ print_usage(const char *prog_name)
     printf("Usage: %s [OPTIONS]...\n", prog_name);
     printf("\n");
     printf("Options:\n");
-    printf("  -v,--version                show the version number and quit\n");
+    printf("  -t,--term=TERM              value to set the environment variable TERM to (foot)\n"
+           "  -v,--version                show the version number and quit\n");
 }
 
 int
@@ -41,17 +42,24 @@ main(int argc, char *const *argv)
     const char *const prog_name = argv[0];
 
     static const struct option longopts[] =  {
+        {"term",     required_argument, 0, 't'},
         {"version",  no_argument,       0, 'v'},
         {"help",     no_argument,       0, 'h'},
         {NULL,       no_argument,       0,   0},
     };
 
+    const char *term = "";
+
     while (true) {
-        int c = getopt_long(argc, argv, ":hv", longopts, NULL);
+        int c = getopt_long(argc, argv, ":t:hv", longopts, NULL);
         if (c == -1)
             break;
 
         switch (c) {
+        case 't':
+            term = optarg;
+            break;
+
         case 'v':
             printf("footclient version %s\n", FOOT_VERSION);
             return EXIT_SUCCESS;
@@ -98,6 +106,14 @@ main(int argc, char *const *argv)
         }
     }
 
+    uint16_t term_len = strlen(term);
+    if (send(fd, &term_len, sizeof(term_len), 0) != sizeof(term_len) ||
+        send(fd, term, term_len, 0) != term_len)
+    {
+        LOG_ERRNO("failed to send TERM to server");
+        goto err;
+    }
+
     if (send(fd, &argc, sizeof(argc), 0) != sizeof(argc)) {
         LOG_ERRNO("failed to send argc/argv to server");
         goto err;

completions/zsh/_footclient

@@ -2,5 +2,12 @@
 
 _arguments \
     -s \
+    '(-t,--term)'{-t,--term}'[value to set the environment variable TERM to (foot)]:term:->terms' \
     '(-v --version)'{-v,--version}'[show the version number and quit]' \
     '(-h --help)'{-h,--help}'[show help message and quit]'
+
+case ${state} in
+    terms)
+        _values 'terminal definitions' $(find /usr/share/terminfo -type f -printf "%f\n")
+        ;;
+esac

server.c

@@ -94,12 +94,22 @@ fdm_client(struct fdm *fdm, int fd, int events, void *data)
 {
     struct client *client = data;
     struct server *server = client->server;
+    char *term_env = NULL;
 
     if (events & EPOLLHUP)
         goto shutdown;
 
     assert(events & EPOLLIN);
 
+    uint16_t term_env_len;
+    if (recv(fd, &term_env_len, sizeof(term_env_len), 0) != sizeof(term_env_len))
+        goto shutdown;
+
+    term_env = malloc(term_env_len + 1);
+    term_env[term_env_len] = '\0';
+    if (recv(fd, term_env, term_env_len, 0) != term_env_len)
+        goto shutdown;
+
     if (recv(fd, &client->argc, sizeof(client->argc), 0) != sizeof(client->argc))
         goto shutdown;
 
@@ -117,7 +127,8 @@ fdm_client(struct fdm *fdm, int fd, int events, void *data)
 
     assert(client->term == NULL);
     client->term = term_init(
-        server->conf, server->fdm, server->wayl, server->conf->term,
+        server->conf, server->fdm, server->wayl,
+        term_env_len > 0 ? term_env : server->conf->term,
         client->argc, client->argv, &term_shutdown_handler, client);
 
     if (client->term == NULL) {
@@ -125,11 +136,14 @@ fdm_client(struct fdm *fdm, int fd, int events, void *data)
         goto shutdown;
     }
 
+    free(term_env);
     return true;
 
 shutdown:
     LOG_DBG("client FD=%d: disconnected", client->fd);
 
+    free(term_env);
+
     fdm_del(fdm, fd);
     client->fd = -1;