xref: /xsrc/external/mit/xauth/dist/xauth.c

/*
 *
 * xauth - manipulate authorization file
 *
 *
Copyright 1989,1998  The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of The Open Group shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from The Open Group.
 * *
 * Author:  Jim Fulton, MIT X Consortium
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "xauth.h"


/*
 * global data
 */
const char *ProgramName;		/* argv[0], set at top of main() */
int verbose = -1;			/* print certain messages */
Bool ignore_locks = False;		/* for error recovery */
Bool break_locks = False;		/* for error recovery */
Bool no_name_lookups = False;		/* show addresses instead of names */

/*
 * local data
 */

static const char *authfilename = NULL;	/* filename of cookie file */
static const char *defcmds[] = { "source", "-", NULL };  /* default command */
static int ndefcmds = 2;
static const char *defsource = "(stdin)";

/*
 * utility routines
 */
_X_NORETURN
static void
usage(void)
{
    static const char *prefixmsg[] = {
"",
"where options include:",
"    -f authfilename                name of authority file to use",
"    -v                             turn on extra messages",
"    -q                             turn off extra messages",
"    -i                             ignore locks on authority file",
"    -b                             break locks on authority file",
"    -n                             do not resolve host names in authority file",
"    -V                             show version number of xauth",
"",
"and commands have the following syntax:",
"",
NULL };
    static const char *suffixmsg[] = {
"A dash may be used with the \"merge\" and \"source\" to read from the",
"standard input.  Commands beginning with \"n\" use numeric format.",
"",
NULL };

    fprintf (stderr, "usage:  %s [-options ...] [command arg ...]\n",
	     ProgramName);
    for (const char **msg = prefixmsg; *msg; msg++) {
	fprintf (stderr, "%s\n", *msg);
    }
    print_help (stderr, NULL, "    ");	/* match prefix indentation */
    fprintf (stderr, "\n");
    for (const char **msg = suffixmsg; *msg; msg++) {
	fprintf (stderr, "%s\n", *msg);
    }
    exit (1);
}


/*
 * The main routine - parses command line and calls action procedures
 */
int
main(int argc, const char *argv[])
{
    const char *sourcename = defsource;
    const char **arglist = defcmds;
    int nargs = ndefcmds;
    int status;

    ProgramName = argv[0];

    for (int i = 1; i < argc; i++) {
	const char *arg = argv[i];

	if (arg[0] == '-') {
	    for (const char *flag = (arg + 1); *flag; flag++) {
	        switch (*flag) {
		  case 'f':		/* -f authfilename */
		    if (++i >= argc) usage ();
		    authfilename = argv[i];
		    continue;
		  case 'v':		/* -v */
		    verbose = 1;
		    continue;
		  case 'q':		/* -q */
		    verbose = 0;
		    continue;
		  case 'b':		/* -b */
		    break_locks = True;
		    continue;
		  case 'i':		/* -i */
		    ignore_locks = True;
		    continue;
		  case 'n':		/* -n */
		    no_name_lookups = True;
		    continue;
		  case 'V':		/* -V */
		    puts(PACKAGE_VERSION);
	   	    exit(0);
		  default:
		    usage ();
	        }
	    }
	} else {
	    sourcename = "(argv)";
	    nargs = argc - i;
	    arglist = argv + i;
	    if (verbose == -1) verbose = 0;
	    break;
	}
    }

    if (verbose == -1) {		/* set default, don't junk stdout */
	verbose = (isatty(fileno(stdout)) != 0);
    }

    if (!authfilename) {
	authfilename = XauFileName ();	/* static name, do not free */
	if (!authfilename) {
	    fprintf (stderr,
		     "%s:  unable to generate an authority file name\n",
		     ProgramName);
	    exit (1);
	}
    }
    if (auth_initialize (authfilename) != 0) {
	/* error message printed in auth_initialize */
	exit (1);
    }

    status = process_command (sourcename, 1, nargs, arglist);

    (void) auth_finalize ();
    exit ((status != 0) ? 1 : 0);
}