summary refs log tree commit diff
path: root/bin/dtch.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--bin/dtch.c320
1 files changed, 160 insertions, 160 deletions
diff --git a/bin/dtch.c b/bin/dtch.c
index 17bbf118..9f55cf68 100644
--- a/bin/dtch.c
+++ b/bin/dtch.c
@@ -40,208 +40,208 @@
 #endif
 
 static struct passwd *getUser(void) {
-    uid_t uid = getuid();
-    struct passwd *user = getpwuid(uid);
-    if (!user) err(EX_OSFILE, "/etc/passwd");
-    return user;
+	uid_t uid = getuid();
+	struct passwd *user = getpwuid(uid);
+	if (!user) err(EX_OSFILE, "/etc/passwd");
+	return user;
 }
 
 static struct sockaddr_un sockAddr(const char *home, const char *name) {
-    struct sockaddr_un addr = { .sun_family = AF_LOCAL };
-    snprintf(addr.sun_path, sizeof(addr.sun_path), "%s/.dtch/%s", home, name);
-    return addr;
+	struct sockaddr_un addr = { .sun_family = AF_LOCAL };
+	snprintf(addr.sun_path, sizeof(addr.sun_path), "%s/.dtch/%s", home, name);
+	return addr;
 }
 
 static char z;
 static struct iovec iov = { .iov_base = &z, .iov_len = 1 };
 
 static ssize_t sendFd(int sock, int fd) {
-    size_t size = CMSG_LEN(sizeof(int));
-    char buf[size];
-    struct msghdr msg = {
-        .msg_iov = &iov,
-        .msg_iovlen = 1,
-        .msg_control = buf,
-        .msg_controllen = size,
-    };
-
-    struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);
-    cmsg->cmsg_len = size;
-    cmsg->cmsg_level = SOL_SOCKET;
-    cmsg->cmsg_type = SCM_RIGHTS;
-    *(int *)CMSG_DATA(cmsg) = fd;
-
-    return sendmsg(sock, &msg, 0);
+	size_t size = CMSG_LEN(sizeof(int));
+	char buf[size];
+	struct msghdr msg = {
+		.msg_iov = &iov,
+		.msg_iovlen = 1,
+		.msg_control = buf,
+		.msg_controllen = size,
+	};
+
+	struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);
+	cmsg->cmsg_len = size;
+	cmsg->cmsg_level = SOL_SOCKET;
+	cmsg->cmsg_type = SCM_RIGHTS;
+	*(int *)CMSG_DATA(cmsg) = fd;
+
+	return sendmsg(sock, &msg, 0);
 }
 
 static int recvFd(int sock) {
-    size_t size = CMSG_LEN(sizeof(int));
-    char buf[size];
-    struct msghdr msg = {
-        .msg_iov = &iov,
-        .msg_iovlen = 1,
-        .msg_control = buf,
-        .msg_controllen = size,
-    };
-
-    ssize_t n = recvmsg(sock, &msg, 0);
-    if (n < 0) return -1;
-
-    struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);
-    if (!cmsg || cmsg->cmsg_type != SCM_RIGHTS) {
-        errno = ENOMSG;
-        return -1;
-    }
-
-    return *(int *)CMSG_DATA(cmsg);
+	size_t size = CMSG_LEN(sizeof(int));
+	char buf[size];
+	struct msghdr msg = {
+		.msg_iov = &iov,
+		.msg_iovlen = 1,
+		.msg_control = buf,
+		.msg_controllen = size,
+	};
+
+	ssize_t n = recvmsg(sock, &msg, 0);
+	if (n < 0) return -1;
+
+	struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);
+	if (!cmsg || cmsg->cmsg_type != SCM_RIGHTS) {
+		errno = ENOMSG;
+		return -1;
+	}
+
+	return *(int *)CMSG_DATA(cmsg);
 }
 
 static struct sockaddr_un addr;
 static void unlinkAddr(void) {
-    unlink(addr.sun_path);
+	unlink(addr.sun_path);
 }
 
 static int dtch(int argc, char *argv[]) {
-    int error;
+	int error;
 
-    const struct passwd *user = getUser();
+	const struct passwd *user = getUser();
 
-    const char *name = user->pw_name;
-    if (argc > 1) {
-        name = argv[1];
-        argv++;
-        argc--;
-    }
-    if (argc > 1) {
-        argv++;
-    } else {
-        argv[0] = user->pw_shell;
-    }
+	const char *name = user->pw_name;
+	if (argc > 1) {
+		name = argv[1];
+		argv++;
+		argc--;
+	}
+	if (argc > 1) {
+		argv++;
+	} else {
+		argv[0] = user->pw_shell;
+	}
 
-    int home = open(user->pw_dir, 0);
-    if (home < 0) err(EX_CANTCREAT, "%s", user->pw_dir);
+	int home = open(user->pw_dir, 0);
+	if (home < 0) err(EX_CANTCREAT, "%s", user->pw_dir);
 
-    error = mkdirat(home, ".dtch", 0700);
-    if (error && errno != EEXIST) err(EX_CANTCREAT, "%s/.dtch", user->pw_dir);
+	error = mkdirat(home, ".dtch", 0700);
+	if (error && errno != EEXIST) err(EX_CANTCREAT, "%s/.dtch", user->pw_dir);
 
-    close(home);
+	close(home);
 
-    int server = socket(PF_LOCAL, SOCK_STREAM, 0);
-    if (server < 0) err(EX_OSERR, "socket");
+	int server = socket(PF_LOCAL, SOCK_STREAM, 0);
+	if (server < 0) err(EX_OSERR, "socket");
 
-    addr = sockAddr(user->pw_dir, name);
-    error = bind(server, (struct sockaddr *)&addr, sizeof(addr));
-    if (error) err(EX_CANTCREAT, "%s", addr.sun_path);
-    fcntl(server, F_SETFD, FD_CLOEXEC);
-    atexit(unlinkAddr);
+	addr = sockAddr(user->pw_dir, name);
+	error = bind(server, (struct sockaddr *)&addr, sizeof(addr));
+	if (error) err(EX_CANTCREAT, "%s", addr.sun_path);
+	fcntl(server, F_SETFD, FD_CLOEXEC);
+	atexit(unlinkAddr);
 
-    int pty;
-    pid_t pid = forkpty(&pty, NULL, NULL, NULL);
-    if (pid < 0) err(EX_OSERR, "forkpty");
+	int pty;
+	pid_t pid = forkpty(&pty, NULL, NULL, NULL);
+	if (pid < 0) err(EX_OSERR, "forkpty");
 
-    if (!pid) {
-        execvp(*argv, argv);
-        err(EX_NOINPUT, "%s", *argv);
-    }
+	if (!pid) {
+		execvp(*argv, argv);
+		err(EX_NOINPUT, "%s", *argv);
+	}
 
-    error = listen(server, 0);
-    if (error) err(EX_OSERR, "listen");
+	error = listen(server, 0);
+	if (error) err(EX_OSERR, "listen");
 
-    for (;;) {
-        int client = accept(server, NULL, NULL);
-        if (client < 0) err(EX_IOERR, "accept");
+	for (;;) {
+		int client = accept(server, NULL, NULL);
+		if (client < 0) err(EX_IOERR, "accept");
 
-        ssize_t size = sendFd(client, pty);
-        if (size < 0) warn("sendmsg");
+		ssize_t size = sendFd(client, pty);
+		if (size < 0) warn("sendmsg");
 
-        size = recv(client, &z, sizeof(z), 0);
-        if (size < 0) warn("recv");
+		size = recv(client, &z, sizeof(z), 0);
+		if (size < 0) warn("recv");
 
-        close(client);
+		close(client);
 
-        int status;
-        pid_t dead = waitpid(pid, &status, WNOHANG);
-        if (dead < 0) err(EX_OSERR, "waitpid(%d)", pid);
-        if (dead) return WIFEXITED(status) ? WEXITSTATUS(status) : EX_SOFTWARE;
-    }
+		int status;
+		pid_t dead = waitpid(pid, &status, WNOHANG);
+		if (dead < 0) err(EX_OSERR, "waitpid(%d)", pid);
+		if (dead) return WIFEXITED(status) ? WEXITSTATUS(status) : EX_SOFTWARE;
+	}
 }
 
 static struct termios saveTerm;
 static void restoreTerm(void) {
-    tcsetattr(STDIN_FILENO, TCSADRAIN, &saveTerm);
-    printf(
-        "\x1b[?1049l" // rmcup
-        "\x1b\x63\x1b[!p\x1b[?3;4l\x1b[4l\x1b>" // reset
-    );
+	tcsetattr(STDIN_FILENO, TCSADRAIN, &saveTerm);
+	printf(
+		"\x1b[?1049l" // rmcup
+		"\x1b\x63\x1b[!p\x1b[?3;4l\x1b[4l\x1b>" // reset
+	);
 }
 
 static int atch(int argc, char *argv[]) {
-    int error;
-
-    const struct passwd *user = getUser();
-    const char *name = (argc > 1) ? argv[1] : user->pw_name;
-
-    int client = socket(PF_LOCAL, SOCK_STREAM, 0);
-    if (client < 0) err(EX_OSERR, "socket");
-
-    struct sockaddr_un addr = sockAddr(user->pw_dir, name);
-    error = connect(client, (struct sockaddr *)&addr, sizeof(addr));
-    if (error) err(EX_NOINPUT, "%s", addr.sun_path);
-
-    int pty = recvFd(client);
-    if (pty < 0) err(EX_IOERR, "recvmsg");
-
-    struct winsize window;
-    error = ioctl(STDIN_FILENO, TIOCGWINSZ, &window);
-    if (error) err(EX_IOERR, "TIOCGWINSZ");
-
-    struct winsize redraw = { .ws_row = 1, .ws_col = 1 };
-    error = ioctl(pty, TIOCSWINSZ, &redraw);
-    if (error) err(EX_IOERR, "TIOCSWINSZ");
-
-    error = ioctl(pty, TIOCSWINSZ, &window);
-    if (error) err(EX_IOERR, "TIOCSWINSZ");
-
-    error = tcgetattr(STDIN_FILENO, &saveTerm);
-    if (error) err(EX_IOERR, "tcgetattr");
-    atexit(restoreTerm);
-
-    struct termios raw;
-    cfmakeraw(&raw);
-    error = tcsetattr(STDIN_FILENO, TCSADRAIN, &raw);
-    if (error) err(EX_IOERR, "tcsetattr");
-
-    char buf[4096];
-    struct pollfd fds[2] = {
-        { .fd = STDIN_FILENO, .events = POLLIN },
-        { .fd = pty, .events = POLLIN },
-    };
-    while (0 < poll(fds, 2, -1)) {
-        if (fds[0].revents) {
-            ssize_t size = read(STDIN_FILENO, buf, sizeof(buf));
-            if (size < 0) err(EX_IOERR, "read(%d)", STDIN_FILENO);
-
-            if (size == 1 && buf[0] == CTRL('Q')) return EX_OK;
-
-            size = write(pty, buf, size);
-            if (size < 0) err(EX_IOERR, "write(%d)", pty);
-        }
-
-        if (fds[1].revents) {
-            ssize_t size = read(pty, buf, sizeof(buf));
-            if (size < 0) err(EX_IOERR, "read(%d)", pty);
-
-            size = write(STDOUT_FILENO, buf, size);
-            if (size < 0) err(EX_IOERR, "write(%d)", STDOUT_FILENO);
-        }
-    }
-    err(EX_IOERR, "poll");
+	int error;
+
+	const struct passwd *user = getUser();
+	const char *name = (argc > 1) ? argv[1] : user->pw_name;
+
+	int client = socket(PF_LOCAL, SOCK_STREAM, 0);
+	if (client < 0) err(EX_OSERR, "socket");
+
+	struct sockaddr_un addr = sockAddr(user->pw_dir, name);
+	error = connect(client, (struct sockaddr *)&addr, sizeof(addr));
+	if (error) err(EX_NOINPUT, "%s", addr.sun_path);
+
+	int pty = recvFd(client);
+	if (pty < 0) err(EX_IOERR, "recvmsg");
+
+	struct winsize window;
+	error = ioctl(STDIN_FILENO, TIOCGWINSZ, &window);
+	if (error) err(EX_IOERR, "TIOCGWINSZ");
+
+	struct winsize redraw = { .ws_row = 1, .ws_col = 1 };
+	error = ioctl(pty, TIOCSWINSZ, &redraw);
+	if (error) err(EX_IOERR, "TIOCSWINSZ");
+
+	error = ioctl(pty, TIOCSWINSZ, &window);
+	if (error) err(EX_IOERR, "TIOCSWINSZ");
+
+	error = tcgetattr(STDIN_FILENO, &saveTerm);
+	if (error) err(EX_IOERR, "tcgetattr");
+	atexit(restoreTerm);
+
+	struct termios raw;
+	cfmakeraw(&raw);
+	error = tcsetattr(STDIN_FILENO, TCSADRAIN, &raw);
+	if (error) err(EX_IOERR, "tcsetattr");
+
+	char buf[4096];
+	struct pollfd fds[2] = {
+		{ .fd = STDIN_FILENO, .events = POLLIN },
+		{ .fd = pty, .events = POLLIN },
+	};
+	while (0 < poll(fds, 2, -1)) {
+		if (fds[0].revents) {
+			ssize_t size = read(STDIN_FILENO, buf, sizeof(buf));
+			if (size < 0) err(EX_IOERR, "read(%d)", STDIN_FILENO);
+
+			if (size == 1 && buf[0] == CTRL('Q')) return EX_OK;
+
+			size = write(pty, buf, size);
+			if (size < 0) err(EX_IOERR, "write(%d)", pty);
+		}
+
+		if (fds[1].revents) {
+			ssize_t size = read(pty, buf, sizeof(buf));
+			if (size < 0) err(EX_IOERR, "read(%d)", pty);
+
+			size = write(STDOUT_FILENO, buf, size);
+			if (size < 0) err(EX_IOERR, "write(%d)", STDOUT_FILENO);
+		}
+	}
+	err(EX_IOERR, "poll");
 }
 
 int main(int argc, char *argv[]) {
-    switch (argv[0][0]) {
-        case 'd': return dtch(argc, argv);
-        case 'a': return atch(argc, argv);
-        default:  return EX_USAGE;
-    }
+	switch (argv[0][0]) {
+		case 'd': return dtch(argc, argv);
+		case 'a': return atch(argc, argv);
+		default:  return EX_USAGE;
+	}
 }