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+/*++
+/* NAME
+/* neuter 3
+/* SUMMARY
+/* neutralize characters before they can explode
+/* SYNOPSIS
+/* #include <stringops.h>
+/*
+/* char *neuter(buffer, bad, replacement)
+/* char *buffer;
+/* const char *bad;
+/* int replacement;
+/* DESCRIPTION
+/* neuter() replaces bad characters in its input
+/* by the given replacement.
+/*
+/* Arguments:
+/* .IP buffer
+/* The null-terminated input string.
+/* .IP bad
+/* The null-terminated bad character string.
+/* .IP replacement
+/* Replacement value for characters in \fIbuffer\fR that do not
+/* pass the bad character test.
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* IBM T.J. Watson Research
+/* P.O. Box 704
+/* Yorktown Heights, NY 10598, USA
+/*--*/
+
+/* System library. */
+
+#include <sys_defs.h>
+#include <string.h>
+
+/* Utility library. */
+
+#include <stringops.h>
+
+/* neuter - neutralize bad characters */
+
+char *neuter(char *string, const char *bad, int replacement)
+{
+ char *cp;
+ int ch;
+
+ for (cp = string; (ch = *(unsigned char *) cp) != 0; cp++)
+ if (strchr(bad, ch) != 0)
+ *cp = replacement;
+ return (string);
+}