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  #   lY>Zځjbѿp      #ifndef PAM_MACROS_H
#define PAM_MACROS_H

/*
 * All kind of macros used by PAM, but usable in some other
 * programs too.
 * Organized by Cristian Gafton <gafton@redhat.com>
 */

/* a 'safe' version of strdup */

#include <stdlib.h>
#include <string.h>

#define  x_strdup(s)  ( (s) ? strdup(s):NULL )

/* Good policy to strike out passwords with some characters not just
   free the memory */

#define _pam_overwrite(x)        \
do {                             \
     register char *__xx__;      \
     if ((__xx__=(x)))           \
          while (*__xx__)        \
               *__xx__++ = '\0'; \
} while (0)

#define _pam_overwrite_n(x,n)   \
do {                             \
     register char *__xx__;      \
     register unsigned int __i__ = 0;    \
     if ((__xx__=(x)))           \
        for (;__i__<n; __i__++) \
            __xx__[__i__] = 0; \
} while (0)

/*
 * Don't just free it, forget it too.
 */

#define _pam_drop(X) \
do {                 \
    if (X) {         \
        free(X);     \
        X=NULL;      \
    }                \
} while (0)

#define _pam_drop_reply(/* struct pam_response * */ reply, /* int */ replies) \
do {                                              \
    int reply_i;                                  \
                                                  \
    for (reply_i=0; reply_i<replies; ++reply_i) { \
	if (reply[reply_i].resp) {                \
	    _pam_overwrite(reply[reply_i].resp);  \
	    free(reply[reply_i].resp);            \
	}                                         \
    }                                             \
    if (reply)                                    \
	free(reply);                              \
} while (0)

/* some debugging code */

#ifdef PAM_DEBUG

/*
 * This provides the necessary function to do debugging in PAM.
 * Cristian Gafton <gafton@redhat.com>
 */

#include <stdio.h>
#include <sys/types.h>
#include <stdarg.h>
#include <errno.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

/*
 * This is for debugging purposes ONLY. DO NOT use on live systems !!!
 * You have been warned :-) - CG
 *
 * to get automated debugging to the log file, it must be created manually.
 * _PAM_LOGFILE must exist and be writable to the programs you debug.
 */

#ifndef _PAM_LOGFILE
#define _PAM_LOGFILE "/var/run/pam-debug.log"
#endif

static void _pam_output_debug_info(const char *file, const char *fn
				   , const int line)
{
    FILE *logfile;
    int must_