add signal management

[webserver.git] / webserver.c

/* depend: */
/* cflags: */
/* linker: color.o debug.o server.o signal.o */

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>

#include "debug.h"
#include "server.h"
#include "signal.h"

/* types */

/* constants */

#define BUFFER_SIZE 4096

/* macros */

/* gobal variables */

char *progname = NULL;
int port = 8080;
socket_t sock = INVALID_SOCKET;

/* help function */

int usage (int ret)
{
    FILE *fid = ret ? stderr : stdout;
    fprintf (fid, "usage: %s\n", progname);
    fprintf (fid, " -h : help message\n");
    fprintf (fid, " -p : port number (%d)\n", port);
    fprintf (fid, " -v : verbose level (%d)\n", verbose);

    return ret;
}

void stop_server (__attribute__((unused)) int sig)
{
    if (sock != INVALID_SOCKET) {
        close_listening_socket (sock);
        exit (0);
    }
}

/* main function */

int main (int argc, char *argv[])
{
    int i = 0;

    /* program name */

    progname = argv[0];
    while (progname[i] != '\0') {
        if ((progname[i] == '/') || (progname[i] == '\\')) {
            progname += i + 1;
            i = 0;
        } else {
            i++;
        }
    }

    /* argument processing */

     while (argc-- > 1) {
        char *arg = *(++argv);
        if (arg[0] != '-') {
            VERBOSE (ERROR, fprintf (stderr, "%s: invalid option -- '%s'\n", progname, arg); usage (1));
            return 1;
        }
        char c = arg[1];
        switch (c) {
            case 'p':
            arg = (arg[2]) ? arg + 2 : (--argc > 0) ? *(++argv) : NULL;
            if (arg == NULL) {
                VERBOSE (ERROR, fprintf (stderr, "%s: missing port number\n", progname); usage (1));
                return 1;
            }
            port = atoi (arg);
            if (port <= 0) {
                VERBOSE (ERROR, fprintf (stderr, "%s: incorrect port number (%s)\n", progname, arg); usage (1));
                return 1;
            }
            break;
        case 'v':
            arg = (arg[2]) ? arg + 2 : (--argc > 0) ? *(++argv) : NULL;
            if (arg == NULL) {
                VERBOSE (ERROR, fprintf (stderr, "%s: missing verbose level\n", progname); usage (1));
                return 1;
            }
            verbose = atoi (arg);
            break;
        case 'h':
        default:
            return usage (c != 'h');
        }
    }

    VERBOSE (DEBUG, fprintf (stdout, "Initializing socket\n"));
    sock = open_listening_socket (port);
    if (sock == INVALID_SOCKET) {
        VERBOSE (ERROR, fprintf (stderr, "Can't open listening socket\n"));
        return 1;
    }

    VERBOSE (INFO, fprintf (stdout, "Listening socket on port %d\n", port));
    sleep (20);

    VERBOSE (DEBUG, fprintf (stdout, "Closing socket\n"));
    close_listening_socket (sock);

    return 2;
}

// test: webserver.exe -h
// test: webserver.exe -h | awk '/usage:/ { rc=1 } END { exit (1-rc) }'
// test: webserver.exe -_ 2> /dev/null | wc -l | xargs test 0 =
// test: webserver.exe -_ 2>&1 | awk '/usage:/ { rc=1 } END { exit (1-rc) }'
// test: webserver.exe error 2>&1 | grep -q 'invalid option'
// test: webserver.exe -v 2>&1 | grep -q 'missing verbose level'
// test: webserver.exe -p 2>&1 | grep -q 'missing port number'
// test: webserver.exe -p -1 2>&1 | grep -q 'incorrect port number'
// test: ( webserver.exe & pid=$!; ( sleep 1; kill -TERM $pid ) ) | grep -q 'Listening socket on port 8080'
// test: ( webserver.exe -p 8008 & pid=$!; ( sleep 1; kill -TERM $pid ) ) | grep -q 'Listening socket on port 8008'
// test: webserver.exe & pid=$!; sleep 1; kill -INT $pid; ps aux | grep -q [w]ebserver.exe && kill -TERM $pid || rc=1; test x$rc = x1

/* vim: set ts=4 sw=4 et: */