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-rw-r--r--src/postconf/postconf_match.c188
1 files changed, 188 insertions, 0 deletions
diff --git a/src/postconf/postconf_match.c b/src/postconf/postconf_match.c
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+++ b/src/postconf/postconf_match.c
@@ -0,0 +1,188 @@
+/*++
+/* NAME
+/* postconf_match 3
+/* SUMMARY
+/* pattern-matching support
+/* SYNOPSIS
+/* #include <postconf.h>
+/*
+/* int pcf_parse_field_pattern(field_expr)
+/* char *field_expr;
+/*
+/* const char *pcf_str_field_pattern(field_pattern)
+/* int field_pattern;
+/*
+/* int pcf_is_magic_field_pattern(field_pattern)
+/* int field_pattern;
+/*
+/* ARGV *pcf_parse_service_pattern(service_expr, min_expr, max_expr)
+/* const char *service_expr;
+/* int min_expr;
+/* int max_expr;
+/*
+/* int PCF_IS_MAGIC_SERVICE_PATTERN(service_pattern)
+/* const ARGV *service_pattern;
+/*
+/* int PCF_MATCH_SERVICE_PATTERN(service_pattern, service_name,
+/* service_type)
+/* const ARGV *service_pattern;
+/* const char *service_name;
+/* const char *service_type;
+/*
+/* const char *pcf_str_field_pattern(field_pattern)
+/* int field_pattern;
+/*
+/* int PCF_IS_MAGIC_PARAM_PATTERN(param_pattern)
+/* const char *param_pattern;
+/*
+/* int PCF_MATCH_PARAM_PATTERN(param_pattern, param_name)
+/* const char *param_pattern;
+/* const char *param_name;
+/* DESCRIPTION
+/* pcf_parse_service_pattern() takes an expression and splits
+/* it up on '/' into an array of sub-expressions, This function
+/* returns null if the input does fewer than "min" or more
+/* than "max" sub-expressions.
+/*
+/* PCF_IS_MAGIC_SERVICE_PATTERN() returns non-zero if any of
+/* the service name or service type sub-expressions contains
+/* a matching operator (as opposed to string literals that
+/* only match themselves). This is an unsafe macro that evaluates
+/* its arguments more than once.
+/*
+/* PCF_MATCH_SERVICE_PATTERN() matches a service name and type
+/* from master.cf against the parsed pattern. This is an unsafe
+/* macro that evaluates its arguments more than once.
+/*
+/* pcf_parse_field_pattern() converts a field sub-expression,
+/* and returns the conversion result.
+/*
+/* pcf_str_field_pattern() converts a result from
+/* pcf_parse_field_pattern() into string form.
+/*
+/* pcf_is_magic_field_pattern() returns non-zero if the field
+/* pattern sub-expression contained a matching operator (as
+/* opposed to a string literal that only matches itself).
+/*
+/* PCF_IS_MAGIC_PARAM_PATTERN() returns non-zero if the parameter
+/* sub-expression contains a matching operator (as opposed to
+/* a string literal that only matches itself). This is an
+/* unsafe macro that evaluates its arguments more than once.
+/*
+/* PCF_MATCH_PARAM_PATTERN() matches a parameter name from
+/* master.cf against the parsed pattern. This is an unsafe
+/* macro that evaluates its arguments more than once.
+/*
+/* Arguments
+/* .IP field_expr
+/* A field expression.
+/* .IP service_expr
+/* This argument is split on '/' into its constituent
+/* sub-expressions.
+/* .IP min_expr
+/* The minimum number of sub-expressions in service_expr.
+/* .IP max_expr
+/* The maximum number of sub-expressions in service_expr.
+/* .IP service_name
+/* Service name from master.cf.
+/* .IP service_type
+/* Service type from master.cf.
+/* .IP param_pattern
+/* A parameter name expression.
+/* DIAGNOSTICS
+/* Fatal errors: invalid syntax.
+/* 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 <msg.h>
+#include <mymalloc.h>
+#include <vstring.h>
+
+/* Global library. */
+
+#include <split_at.h>
+
+/* Application-specific. */
+
+#include <postconf.h>
+
+ /*
+ * Conversion table. Each PCF_MASTER_NAME_XXX name entry must be stored at
+ * table offset PCF_MASTER_FLD_XXX. So don't mess it up.
+ */
+NAME_CODE pcf_field_name_offset[] = {
+ PCF_MASTER_NAME_SERVICE, PCF_MASTER_FLD_SERVICE,
+ PCF_MASTER_NAME_TYPE, PCF_MASTER_FLD_TYPE,
+ PCF_MASTER_NAME_PRIVATE, PCF_MASTER_FLD_PRIVATE,
+ PCF_MASTER_NAME_UNPRIV, PCF_MASTER_FLD_UNPRIV,
+ PCF_MASTER_NAME_CHROOT, PCF_MASTER_FLD_CHROOT,
+ PCF_MASTER_NAME_WAKEUP, PCF_MASTER_FLD_WAKEUP,
+ PCF_MASTER_NAME_MAXPROC, PCF_MASTER_FLD_MAXPROC,
+ PCF_MASTER_NAME_CMD, PCF_MASTER_FLD_CMD,
+ "*", PCF_MASTER_FLD_WILDC,
+ 0, PCF_MASTER_FLD_NONE,
+};
+
+/* pcf_parse_field_pattern - parse service attribute pattern */
+
+int pcf_parse_field_pattern(const char *field_name)
+{
+ int field_pattern;
+
+ if ((field_pattern = name_code(pcf_field_name_offset,
+ NAME_CODE_FLAG_STRICT_CASE,
+ field_name)) == PCF_MASTER_FLD_NONE)
+ msg_fatal("invalid service attribute name: \"%s\"", field_name);
+ return (field_pattern);
+}
+
+/* pcf_parse_service_pattern - parse service pattern */
+
+ARGV *pcf_parse_service_pattern(const char *pattern, int min_expr, int max_expr)
+{
+ ARGV *argv;
+ char **cpp;
+
+ /*
+ * Work around argv_split() lameness.
+ */
+ if (*pattern == '/')
+ return (0);
+ argv = argv_split(pattern, PCF_NAMESP_SEP_STR);
+ if (argv->argc < min_expr || argv->argc > max_expr) {
+ argv_free(argv);
+ return (0);
+ }
+
+ /*
+ * Allow '*' only all by itself.
+ */
+ for (cpp = argv->argv; *cpp; cpp++) {
+ if (!PCF_MATCH_ANY(*cpp) && strchr(*cpp, PCF_MATCH_WILDC_STR[0]) != 0) {
+ argv_free(argv);
+ return (0);
+ }
+ }
+
+ /*
+ * Provide defaults for missing fields.
+ */
+ while (argv->argc < max_expr)
+ argv_add(argv, PCF_MATCH_WILDC_STR, ARGV_END);
+ return (argv);
+}