Start emacsclient across multi plaform

README.mkd

windres -O coff icon.rc icon.res
gcc icon.res startemacs.c -o startemacs

emacs.ico

icon.rc

1 ICON "emacs.ico"

icon.res

IconsExtact.exe

startemacs.c

#include <stdio.h>

int main (int argc, char *argv[])
{
    char *filename, appname[255];
    size_t size = 200;
    sprintf(appname, "%s/%s", getcwd(appname, size), argv[0]);
    if(argc > 1) {
        filename = argv[1];
    } else {
        filename = "newfile";
    }
    printf("%s\n%s\n", appname, filename);

    if(!strcmp(filename, "--install")) {
        char cmd[500];
        sprintf(cmd, "reg add \"HKCR\\*\\shell\\openwithemacs\\command\" /ve /d \"\\\"%s\\\" \\\"%%1\\\"\" /f", appname);
        system("reg add \"HKCR\\*\\shell\\openwithemacs\" /ve /d \"Edit With Emacs\" /f");
        system(cmd);
    } else if(!strcmp(filename, "--uninstall")) {
        system("reg delete \"HKCR\\*\\shell\\openwithemacs\" /f");
    } else {
        char cmd[255];
        sprintf(cmd, "emacsclientw.exe --alternate-editor=\"runemacs.exe\" \"%s\"", filename);
        // TODO: quote & cmd window & waitexit
        system(cmd);
    }
    return 0;
}

// exec     http://www.gnu.org/software/libc/manual/html_node/Executing-a-File.html