Re: How do online html docs in GTK+? in /portable/ way possible too?

[Chris Wareham <chris wareham iosystems co uk>]

Christian Seberino <seberino spawar navy mil> writes:
> Netscape sounds interesting.... do you
> know how to do this?... does this mean "fork" and "exec"
> system calls? I don't suppose it is possible to do this with
> PThreads is it?

You can't do it from a thread, as you'd still need to fork and
exec. The following snippet of code loads a URL in an already
running Netscape, or launches it if it isn't running.


void some_callback(GtkWidget *widget, gpointer data) {
    gchar buf[MAXPATHLEN];
    gchar *url = (gchar *)data;

    g_snprintf(buf, MAXPATHLEN, "%s/.netscape/lock", g_get_home_dir());

    if(lstat(buf, &statbuf))
        g_snprintf(buf, MAXPATHLEN,
            "netscape %s", url);
    else
        g_snprintf(buf, MAXPATHLEN,
            "netscape -remote openURL(%s,new_window)", url);

    if(!start_browser(buf))
        /* show an error dialog */;
}

gboolean start_browser(const gchar *cmd) {
    char **args, *ptr, *tokptr;
    int argc, len, i;
    pid_t pid;

    if((pid = fork()) == 0) {
        if((pid = fork()) == 0) {
            len = strlen(cmd);
            argc = 1;
            for(i = 0; i < len; i++) {
                if(cmd[i] == ' ')
                    argc++;
            }
            args = g_malloc(sizeof(char *) * (argc + 1));
            args[argc] = NULL;
            if(argc == 1) {
                args[0] = g_malloc(sizeof(char) * (len + 1));
                strcpy(args[0], cmd);
            } else {
                ptr = g_malloc(sizeof(char) * (len + 1));
                strcpy(ptr, cmd);
                tokptr = strtok(ptr, " ");
                args[0] = tokptr;
                i = 1;
                for(i = 1; tokptr; i++) {
                    tokptr = strtok(NULL, " ");
                    args[i] = tokptr;
                }
                args[i] = tokptr;
            }
/*            for(i = 0; i < argc; i++) {
                g_print("arg %d : %s\n", i + 1, args[i]);
            }
            _exit(0); */
            execvp(args[0], args);
        }
        _exit(0);
    } else if(pid < 0) {
        return FALSE;
    }

    return TRUE;
}

Chris

--
chris wareham iosystems co uk (work)
cwareham btinternet com (home)