1998-11-18 01:16:21 +00:00
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/* $Header: /home/morgan/pam/Linux-PAM-0.53/libpam_misc/RCS/xstrdup.c,v 1.4 1996/11/10 20:10:56 morgan Exp $ */
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/*
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* $Log: xstrdup.c,v $
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* Revision 1.4 1996/11/10 20:10:56 morgan
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* modification for stack paranoia
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*
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*/
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1998-11-18 01:22:46 +00:00
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#include <stdlib.h>
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1998-11-18 01:16:21 +00:00
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#include <security/pam_misc.h>
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/*
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* Safe duplication of character strings. "Paranoid"; don't leave
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* evidence of old token around for later stack analysis.
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*/
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char *xstrdup(const char *x)
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{
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register char *new=NULL;
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if (x != NULL) {
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register int i;
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for (i=0; x[i]; ++i); /* length of string */
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if ((new = malloc(++i)) == NULL) {
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i = 0;
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} else {
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while (i-- > 0) {
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new[i] = x[i];
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}
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}
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x = NULL;
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}
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return new; /* return the duplicate or NULL on error */
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}
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