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https://github.com/sys-fs/tubes
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Use syslog and getopt
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Thomas Mannay
parent
de2010c262
commit
d9a38ceabb
6
tubes.1
6
tubes.1
@ -1,4 +1,4 @@
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.TH TUBES 1 tubes-1.3.0
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.TH TUBES 1 tubes-1.4.0
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.SH NAME
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tubes \- irc pipes
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.SH SYNOPSIS
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@ -33,7 +33,7 @@ if SSL is also desired
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The incoming and outgoing FIFO buffers are stored in /tmp and are named for
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the server tubes is connected to with .in or .out appended to the end.
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~/.tubes.err is used to store an error string if tubes exits with -1.
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.SH RETURN VALUE
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Returns -1 on error, 0 on success.
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.SH EXIT STATUS
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Returns 1 on error, 0 on success.
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.SH AUTHOR
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Copyright \(co 2016 Thomas Mannay <audiobarrier@openmailbox.org>.
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136
tubes.c
136
tubes.c
@ -12,54 +12,55 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <time.h>
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#include <unistd.h>
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#define PING_TIMEOUT 240
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char *argv0;
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static SSL_CTX *ctx;
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static SSL *ssl;
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static char *host = "chat.freenode.net";
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static int port = 6667;
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static FILE *log;
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static char port[6] = "6667";
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static short use_ssl = 0;
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static unsigned int last_response;
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static FILE *
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slog(char *file)
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static int
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tube(char *direction)
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{
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const char *home = getenv("HOME");
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char path[100];
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FILE *fp;
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int fd;
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char buf[512];
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snprintf(path, 100, "%s/%s", home, file);
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mknod(path, 0 | 0666, 0);
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fp = fopen(path, "w");
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snprintf(buf, sizeof(buf), "/tmp/%s.%s", host, direction);
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unlink(buf);
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mkfifo(buf, 0660);
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if ((fd = open(buf, O_RDWR)) < 0)
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perror("tube");
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return fp;
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return fd;
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}
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static int
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dial(char *host, int port)
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dial(char *host, char *port)
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{
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int sockfd, err;
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struct addrinfo hints, *serv;
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char tmp[8];
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snprintf(tmp, 8, "%d", port);
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = AF_INET;
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hints.ai_socktype = SOCK_STREAM;
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if ((err = getaddrinfo(host, tmp, &hints, &serv)) != 0) {
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fprintf(log, "getaddrinfo: %s\n", gai_strerror(err));
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if ((err = getaddrinfo(host, port, &hints, &serv)) != 0) {
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fprintf(stderr, "dial: %s\n", gai_strerror(err));
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return -1;
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} else if ((sockfd = socket(serv->ai_family, serv->ai_socktype,
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serv->ai_protocol)) == -1) {
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fprintf(log, "tubes: error on socket()\n");
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}
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if ((sockfd = socket(serv->ai_family, serv->ai_socktype,
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serv->ai_protocol)) < 0) {
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perror("dial");
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return -1;
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} else if (connect(sockfd, serv->ai_addr, serv->ai_addrlen) == -1) {
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fprintf(log, "tubes: error on connect().\n");
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}
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if (connect(sockfd, serv->ai_addr, serv->ai_addrlen) < 0) {
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perror("dial");
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close(sockfd);
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return -1;
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}
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@ -84,7 +85,7 @@ sslify(int *sockfd)
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SSL_set_connect_state(ssl);
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if ((r = SSL_connect(ssl)) < 1) {
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fprintf(log, "sslify: %s\n", strerror(SSL_get_error(ssl, r)));
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fprintf(stderr, "sslify: %s\n", strerror(SSL_get_error(ssl, r)));
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SSL_CTX_free(ctx);
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return -1;
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}
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@ -102,57 +103,38 @@ main(int argc, char **argv)
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char buf[512];
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int i, r, status;
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for (i = 1; i < argc; i++) {
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r = argv[i][1];
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if (argv[i][0] != '-' || argv[i][2])
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r = -1;
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switch (r) {
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while ((i = getopt(argc, argv, "Shp:")) != -1) {
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switch (i) {
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case 'S':
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use_ssl = 1;
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port = 6697;
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strncpy(port, "6697", sizeof(port));
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break;
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case 'h':
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if (++i < argc)
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host = argv[i];
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host = optarg;
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break;
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case 'p':
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if (++i < argc)
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port = atoi(argv[i]);
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strncpy(port, optarg, sizeof(port));
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break;
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default:
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fprintf(stderr,
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"usage: tubes [-S] [-h host] [-p port]\n");
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exit(0);
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fprintf(stderr, "usage: tubes [-S] [-h host] [-p port]\n");
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return 1;
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}
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}
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if ((log = slog(".tubes.err")) == NULL) {
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fprintf(stderr, "error on slog()");
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exit(-1);
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if ((sockfd = dial(host, port)) < 0)
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return 1;
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if (use_ssl && sslify(&sockfd) < 0)
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return 1;
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if ((in = tube("in")) < 0)
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return 1;
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if ((out = tube("out")) < 0)
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return 1;
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if (daemon(0, 0) < 0) {
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perror("main");
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return 1;
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}
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if (daemon(0, 0) == -1) {
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fprintf(log, "error on daemon()\n");
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exit(-1);
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}
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if ((sockfd = dial(host, port)) == -1)
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exit(-1);
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if (use_ssl && sslify(&sockfd) == -1)
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exit(-1);
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snprintf(buf, 512, "/tmp/%s.in", host);
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unlink(buf);
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mkfifo(buf, 0660);
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if ((in = open(buf, O_RDWR | O_NONBLOCK)) < 0) {
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fprintf(log, "in: error on open()\n");
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exit(-1);
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}
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snprintf(buf, 512, "/tmp/%s.out", host);
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unlink(buf);
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mkfifo(buf, 0660);
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if ((out = open(buf, O_RDWR)) < 0) {
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fprintf(log, "out: error on open()\n");
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exit(-1);
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}
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openlog(argv[0], LOG_PID, LOG_DAEMON);
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for (status = 0;;) {
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FD_ZERO(&rd);
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maxfd = (out >= sockfd) ? out : sockfd;
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@ -165,22 +147,29 @@ main(int argc, char **argv)
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if (r < 0) {
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if (errno == EINTR)
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continue;
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fprintf(log, "error on select()\n");
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status = -1;
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syslog(LOG_ERR, strerror(errno));
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status = 1;
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break;
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} else if (r == 0 && last_response-time(NULL) >= PING_TIMEOUT) {
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fprintf(log, "ping timeout\n");
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status = -1;
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} else if (r == 0 && last_response - time(NULL) >= PING_TIMEOUT) {
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syslog(LOG_ERR, "ping timeout");
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status = 1;
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break;
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}
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if (FD_ISSET(out, &rd))
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if ((i = read(out, buf, sizeof(buf))) > 0) {
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if (FD_ISSET(out, &rd)) {
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if ((i = read(out, buf, sizeof(buf))) < 0) {
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if (errno == EINTR)
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continue;
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syslog(LOG_ERR, "broken pipe");
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status = 1;
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break;
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} else if (i > 0) {
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buf[i] = 0;
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if (use_ssl)
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SSL_write(ssl, buf, strlen(buf));
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else
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send(sockfd, buf, strlen(buf), 0);
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}
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}
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if (FD_ISSET(sockfd, &rd)) {
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if (use_ssl) {
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do {
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@ -194,15 +183,15 @@ main(int argc, char **argv)
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i = recv(sockfd, buf, sizeof(buf), 0);
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if (i != -1) {
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if (i == 0) {
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fprintf(log, "connection closed\n");
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syslog(LOG_NOTICE, "connection closed");
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break;
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}
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buf[i] = 0;
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if (write(in, buf, strlen(buf)) < 0) {
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if (errno == EINTR)
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continue;
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fprintf(log, "error on write()\n");
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status = -1;
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syslog(LOG_ERR, "broken pipe");
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status = 1;
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break;
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}
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last_response = time(NULL);
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@ -213,7 +202,7 @@ main(int argc, char **argv)
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close(sockfd);
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close(in);
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close(out);
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fclose(log);
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closelog();
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ERR_free_strings();
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EVP_cleanup();
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unlink(buf);
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snprintf(buf, 512, "/tmp/%s.out", host);
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unlink(buf);
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exit(status);
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return status;
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}
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