Move C code to bin, Makefile, AGPL

1 files changed, 0 insertions, 254 deletions

diff --git a/home/.bin/dtch.c b/home/.bin/dtch.c
deleted file mode 100755
index a37eeeeb..00000000
--- a/home/.bin/dtch.c
+++ /dev/null
@@ -1,254 +0,0 @@
-#if 0
-set -e
-bin=$(dirname $0)
-cc -Wall -Wextra -pedantic $@ -lutil -o $bin/dtch $0
-ln -f $bin/dtch $bin/atch
-exit
-#endif
-
-// Session attach and detach.
-
-#include <err.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <poll.h>
-#include <pwd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/ioctl.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <sys/un.h>
-#include <sys/wait.h>
-#include <sysexits.h>
-#include <termios.h>
-#include <unistd.h>
-
-#if defined __FreeBSD__
-#include <libutil.h>
-#elif defined __linux__
-#include <pty.h>
-#else
-#include <util.h>
-#endif
-
-static struct passwd *getUser(void) {
-    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;
-}
-
-static ssize_t writeAll(int fd, const char *buf, size_t len) {
-    ssize_t writeLen;
-    while (0 < (writeLen = write(fd, buf, len))) {
-        buf += writeLen;
-        len -= writeLen;
-    }
-    return writeLen;
-}
-
-char z;
-struct iovec iov = { .iov_base = &z, .iov_len = 1 };
-
-static ssize_t sendFd(int sock, int fd) {
-    size_t len = CMSG_LEN(sizeof(int));
-    char buf[len];
-    struct msghdr msg = {
-        .msg_iov = &iov,
-        .msg_iovlen = 1,
-        .msg_control = buf,
-        .msg_controllen = len,
-    };
-
-    struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);
-    cmsg->cmsg_len = len;
-    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 len = CMSG_LEN(sizeof(int));
-    char buf[len];
-    struct msghdr msg = {
-        .msg_iov = &iov,
-        .msg_iovlen = 1,
-        .msg_control = buf,
-        .msg_controllen = len,
-    };
-
-    ssize_t n = recvmsg(sock, &msg, 0);
-    if (n < 0) return -1;
-
-    struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);
-    if (!cmsg) { errno = ENOMSG; return -1; }
-    if (cmsg->cmsg_type != SCM_RIGHTS) { errno = EBADMSG; return -1; }
-
-    return *(int *)CMSG_DATA(cmsg);
-}
-
-static struct sockaddr_un addr;
-
-static void unlinkAddr(void) {
-    unlink(addr.sun_path);
-}
-
-static int dtch(int argc, char *argv[]) {
-    int error;
-
-    struct passwd *user = getUser();
-
-    char *name = user->pw_name;
-    char *cmd = user->pw_shell;
-    if (argc > 2) {
-        name = argv[1];
-        cmd = argv[2];
-        argv += 2;
-    } else if (argc > 1) {
-        name = argv[1];
-        argv++;
-    }
-
-    int home = open(user->pw_dir, 0);
-    if (home < 0) err(EX_IOERR, "%s", user->pw_dir);
-    error = mkdirat(home, ".dtch", S_IRWXU);
-    if (error && errno != EEXIST) err(EX_IOERR, "%s/.dtch", user->pw_dir);
-    error = close(home);
-    if (error) err(EX_IOERR, "%s", user->pw_dir);
-
-    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_IOERR, "%s", addr.sun_path);
-    atexit(unlinkAddr);
-
-    error = chmod(addr.sun_path, 0600);
-    if (error) err(EX_IOERR, "%s", addr.sun_path);
-
-    int master;
-    pid_t pid = forkpty(&master, NULL, NULL, NULL);
-    if (pid < 0) err(EX_OSERR, "forkpty");
-
-    if (!pid) {
-        error = close(server);
-        if (error) warn("close(%d)", server);
-        execvp(cmd, argv);
-        err(EX_OSERR, "%s", cmd);
-    }
-
-    error = listen(server, 0);
-    if (error) err(EX_OSERR, "listen");
-
-    for (;;) {
-        int client = accept(server, NULL, NULL);
-        if (client < 0) err(EX_IOERR, "accept(%d)", server);
-
-        ssize_t len = sendFd(client, master);
-        if (len < 0) warn("sendmsg(%d)", client);
-
-        len = recv(client, &z, sizeof(z), 0);
-        if (len < 0) warn("recv(%d)", client);
-
-        error = close(client);
-        if (error) warn("close(%d)", client);
-
-        pid_t dead = waitpid(pid, NULL, WNOHANG);
-        if (dead < 0) warn("waitpid(%d)", pid);
-        if (dead) exit(EX_OK);
-    }
-}
-
-static struct termios saveTerm;
-
-static void restoreTerm(void) {
-    tcsetattr(STDERR_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;
-
-    struct passwd *user = getUser();
-    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_IOERR, "%s", addr.sun_path);
-
-    int master = recvFd(client);
-    if (master < 0) err(EX_IOERR, "recvmsg(%d)", client);
-
-    struct winsize window;
-    error = ioctl(STDERR_FILENO, TIOCGWINSZ, &window);
-    if (error) err(EX_IOERR, "ioctl(%d, TIOCGWINSZ)", STDERR_FILENO);
-
-    error = ioctl(master, TIOCSWINSZ, &window);
-    if (error) err(EX_IOERR, "ioctl(%d, TIOCSWINSZ)", master);
-
-    error = tcgetattr(STDERR_FILENO, &saveTerm);
-    if (error) err(EX_IOERR, "tcgetattr(%d)", STDERR_FILENO);
-    atexit(restoreTerm);
-
-    struct termios raw;
-    cfmakeraw(&raw);
-    error = tcsetattr(STDERR_FILENO, TCSADRAIN, &raw);
-    if (error) err(EX_IOERR, "tcsetattr(%d)", STDERR_FILENO);
-
-    char ctrlL = CTRL('L');
-    ssize_t len = write(master, &ctrlL, 1);
-    if (len < 0) err(EX_IOERR, "write(%d)", master);
-
-    struct pollfd fds[2] = {
-        { .fd = STDIN_FILENO, .events = POLLIN },
-        { .fd = master, .events = POLLIN },
-    };
-
-    while (0 < poll(fds, 2, -1)) {
-        char buf[4096];
-        ssize_t len;
-
-        if (fds[0].revents) {
-            len = read(STDIN_FILENO, buf, sizeof(buf));
-            if (len < 0) err(EX_IOERR, "read(%d)", STDIN_FILENO);
-
-            if (len && buf[0] == CTRL('Q')) exit(EX_OK);
-
-            len = writeAll(master, buf, len);
-            if (len < 0) err(EX_IOERR, "write(%d)", master);
-        }
-
-        if (fds[1].revents) {
-            len = read(master, buf, sizeof(buf));
-            if (len < 0) err(EX_IOERR, "read(%d)", master);
-            len = writeAll(STDOUT_FILENO, buf, len);
-            if (len < 0) err(EX_IOERR, "write(%d)", STDOUT_FILENO);
-        }
-    }
-    err(EX_IOERR, "poll([%d,%d])", STDIN_FILENO, master);
-}
-
-int main(int argc, char *argv[]) {
-    switch (argv[0][0]) {
-        case 'd': return dtch(argc, argv);
-        case 'a': return atch(argc, argv);
-    }
-    return EX_USAGE;
-}