diff options
Diffstat (limited to 'src/postconf/postconf_match.c')
| -rw-r--r-- | src/postconf/postconf_match.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/src/postconf/postconf_match.c b/src/postconf/postconf_match.c new file mode 100644 index 0000000..53709a4 --- /dev/null +++ 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); +} |