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-rw-r--r--src/stdio-bridge/stdio-bridge.c367
1 files changed, 0 insertions, 367 deletions
diff --git a/src/stdio-bridge/stdio-bridge.c b/src/stdio-bridge/stdio-bridge.c
deleted file mode 100644
index f926fe5538..0000000000
--- a/src/stdio-bridge/stdio-bridge.c
+++ /dev/null
@@ -1,367 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <sys/types.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include <sys/epoll.h>
-#include <stddef.h>
-
-#include "log.h"
-#include "util.h"
-#include "socket-util.h"
-
-#define BUFFER_SIZE (64*1024)
-#define EXTRA_SIZE 16
-
-static bool initial_nul = false;
-static bool auth_over = false;
-
-static void format_uid(char *buf, size_t l) {
- char text[20 + 1]; /* enough space for a 64bit integer plus NUL */
- unsigned j;
-
- assert(l > 0);
-
- snprintf(text, sizeof(text)-1, "%llu", (unsigned long long) geteuid());
- text[sizeof(text)-1] = 0;
-
- memset(buf, 0, l);
-
- for (j = 0; text[j] && j*2+2 < l; j++) {
- buf[j*2] = hexchar(text[j] >> 4);
- buf[j*2+1] = hexchar(text[j] & 0xF);
- }
-
- buf[j*2] = 0;
-}
-
-static size_t patch_in_line(char *line, size_t l, size_t left) {
- size_t r;
-
- if (line[0] == 0 && !initial_nul) {
- initial_nul = true;
- line += 1;
- l -= 1;
- r = 1;
- } else
- r = 0;
-
- if (l == 5 && strncmp(line, "BEGIN", 5) == 0) {
- r += l;
- auth_over = true;
-
- } else if (l == 17 && strncmp(line, "NEGOTIATE_UNIX_FD", 17) == 0) {
- memmove(line + 13, line + 17, left);
- memcpy(line, "NEGOTIATE_NOP", 13);
- r += 13;
-
- } else if (l >= 14 && strncmp(line, "AUTH EXTERNAL ", 14) == 0) {
- char uid[20*2 + 1];
- size_t len;
-
- format_uid(uid, sizeof(uid));
- len = strlen(uid);
- assert(len <= EXTRA_SIZE);
-
- memmove(line + 14 + len, line + l, left);
- memcpy(line + 14, uid, len);
-
- r += 14 + len;
- } else
- r += l;
-
- return r;
-}
-
-static size_t patch_in_buffer(char* in_buffer, size_t *in_buffer_full) {
- size_t i, good = 0;
-
- if (*in_buffer_full <= 0)
- return *in_buffer_full;
-
- /* If authentication is done, we don't touch anything anymore */
- if (auth_over)
- return *in_buffer_full;
-
- if (*in_buffer_full < 2)
- return 0;
-
- for (i = 0; i <= *in_buffer_full - 2; i ++) {
-
- /* Fully lines can be send on */
- if (in_buffer[i] == '\r' && in_buffer[i+1] == '\n') {
- if (i > good) {
- size_t old_length, new_length;
-
- old_length = i - good;
- new_length = patch_in_line(in_buffer+good, old_length, *in_buffer_full - i);
- *in_buffer_full = *in_buffer_full + new_length - old_length;
-
- good += new_length + 2;
-
- } else
- good = i+2;
- }
-
- if (auth_over)
- break;
- }
-
- return good;
-}
-
-int main(int argc, char *argv[]) {
- int r = EXIT_FAILURE, fd = -1, ep = -1;
- union sockaddr_union sa;
- char in_buffer[BUFFER_SIZE+EXTRA_SIZE], out_buffer[BUFFER_SIZE+EXTRA_SIZE];
- size_t in_buffer_full = 0, out_buffer_full = 0;
- struct epoll_event stdin_ev, stdout_ev, fd_ev;
- bool stdin_readable = false, stdout_writable = false, fd_readable = false, fd_writable = false;
- bool stdin_rhup = false, stdout_whup = false, fd_rhup = false, fd_whup = false;
-
- if (argc > 1) {
- log_error("This program takes no argument.");
- return EXIT_FAILURE;
- }
-
- log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
- log_parse_environment();
- log_open();
-
- if ((fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0)) < 0) {
- log_error("Failed to create socket: %s", strerror(errno));
- goto finish;
- }
-
- zero(sa);
- sa.un.sun_family = AF_UNIX;
- strncpy(sa.un.sun_path, "/run/dbus/system_bus_socket", sizeof(sa.un.sun_path));
-
- if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) {
- log_error("Failed to connect: %m");
- goto finish;
- }
-
- fd_nonblock(STDIN_FILENO, 1);
- fd_nonblock(STDOUT_FILENO, 1);
-
- if ((ep = epoll_create1(EPOLL_CLOEXEC)) < 0) {
- log_error("Failed to create epoll: %m");
- goto finish;
- }
-
- zero(stdin_ev);
- stdin_ev.events = EPOLLIN|EPOLLET;
- stdin_ev.data.fd = STDIN_FILENO;
-
- zero(stdout_ev);
- stdout_ev.events = EPOLLOUT|EPOLLET;
- stdout_ev.data.fd = STDOUT_FILENO;
-
- zero(fd_ev);
- fd_ev.events = EPOLLIN|EPOLLOUT|EPOLLET;
- fd_ev.data.fd = fd;
-
- if (epoll_ctl(ep, EPOLL_CTL_ADD, STDIN_FILENO, &stdin_ev) < 0 ||
- epoll_ctl(ep, EPOLL_CTL_ADD, STDOUT_FILENO, &stdout_ev) < 0 ||
- epoll_ctl(ep, EPOLL_CTL_ADD, fd, &fd_ev) < 0) {
- log_error("Failed to regiser fds in epoll: %m");
- goto finish;
- }
-
- do {
- struct epoll_event ev[16];
- ssize_t k;
- int i, nfds;
-
- if ((nfds = epoll_wait(ep, ev, ELEMENTSOF(ev), -1)) < 0) {
-
- if (errno == EINTR || errno == EAGAIN)
- continue;
-
- log_error("epoll_wait(): %m");
- goto finish;
- }
-
- assert(nfds >= 1);
-
- for (i = 0; i < nfds; i++) {
- if (ev[i].data.fd == STDIN_FILENO) {
-
- if (!stdin_rhup && (ev[i].events & (EPOLLHUP|EPOLLIN)))
- stdin_readable = true;
-
- } else if (ev[i].data.fd == STDOUT_FILENO) {
-
- if (ev[i].events & EPOLLHUP) {
- stdout_writable = false;
- stdout_whup = true;
- }
-
- if (!stdout_whup && (ev[i].events & EPOLLOUT))
- stdout_writable = true;
-
- } else if (ev[i].data.fd == fd) {
-
- if (ev[i].events & EPOLLHUP) {
- fd_writable = false;
- fd_whup = true;
- }
-
- if (!fd_rhup && (ev[i].events & (EPOLLHUP|EPOLLIN)))
- fd_readable = true;
-
- if (!fd_whup && (ev[i].events & EPOLLOUT))
- fd_writable = true;
- }
- }
-
- while ((stdin_readable && in_buffer_full <= 0) ||
- (fd_writable && patch_in_buffer(in_buffer, &in_buffer_full) > 0) ||
- (fd_readable && out_buffer_full <= 0) ||
- (stdout_writable && out_buffer_full > 0)) {
-
- size_t in_buffer_good = 0;
-
- if (stdin_readable && in_buffer_full < BUFFER_SIZE) {
-
- if ((k = read(STDIN_FILENO, in_buffer + in_buffer_full, BUFFER_SIZE - in_buffer_full)) < 0) {
-
- if (errno == EAGAIN)
- stdin_readable = false;
- else if (errno == EPIPE || errno == ECONNRESET)
- k = 0;
- else {
- log_error("read(): %m");
- goto finish;
- }
- } else
- in_buffer_full += (size_t) k;
-
- if (k == 0) {
- stdin_rhup = true;
- stdin_readable = false;
- shutdown(STDIN_FILENO, SHUT_RD);
- close_nointr_nofail(STDIN_FILENO);
- }
- }
-
- in_buffer_good = patch_in_buffer(in_buffer, &in_buffer_full);
-
- if (fd_writable && in_buffer_good > 0) {
-
- if ((k = write(fd, in_buffer, in_buffer_good)) < 0) {
-
- if (errno == EAGAIN)
- fd_writable = false;
- else if (errno == EPIPE || errno == ECONNRESET) {
- fd_whup = true;
- fd_writable = false;
- shutdown(fd, SHUT_WR);
- } else {
- log_error("write(): %m");
- goto finish;
- }
-
- } else {
- assert(in_buffer_full >= (size_t) k);
- memmove(in_buffer, in_buffer + k, in_buffer_full - k);
- in_buffer_full -= k;
- }
- }
-
- if (fd_readable && out_buffer_full < BUFFER_SIZE) {
-
- if ((k = read(fd, out_buffer + out_buffer_full, BUFFER_SIZE - out_buffer_full)) < 0) {
-
- if (errno == EAGAIN)
- fd_readable = false;
- else if (errno == EPIPE || errno == ECONNRESET)
- k = 0;
- else {
- log_error("read(): %m");
- goto finish;
- }
- } else
- out_buffer_full += (size_t) k;
-
- if (k == 0) {
- fd_rhup = true;
- fd_readable = false;
- shutdown(fd, SHUT_RD);
- }
- }
-
- if (stdout_writable && out_buffer_full > 0) {
-
- if ((k = write(STDOUT_FILENO, out_buffer, out_buffer_full)) < 0) {
-
- if (errno == EAGAIN)
- stdout_writable = false;
- else if (errno == EPIPE || errno == ECONNRESET) {
- stdout_whup = true;
- stdout_writable = false;
- shutdown(STDOUT_FILENO, SHUT_WR);
- close_nointr(STDOUT_FILENO);
- } else {
- log_error("write(): %m");
- goto finish;
- }
-
- } else {
- assert(out_buffer_full >= (size_t) k);
- memmove(out_buffer, out_buffer + k, out_buffer_full - k);
- out_buffer_full -= k;
- }
- }
- }
-
- if (stdin_rhup && in_buffer_full <= 0 && !fd_whup) {
- fd_whup = true;
- fd_writable = false;
- shutdown(fd, SHUT_WR);
- }
-
- if (fd_rhup && out_buffer_full <= 0 && !stdout_whup) {
- stdout_whup = true;
- stdout_writable = false;
- shutdown(STDOUT_FILENO, SHUT_WR);
- close_nointr(STDOUT_FILENO);
- }
-
- } while (!stdout_whup || !fd_whup);
-
- r = EXIT_SUCCESS;
-
-finish:
- if (fd >= 0)
- close_nointr_nofail(fd);
-
- if (ep >= 0)
- close_nointr_nofail(ep);
-
- return r;
-}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-23 07:06:31 +0000