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Diffstat (limited to '')
| -rw-r--r-- | src/global/cfg_parser.c | 322 |
1 files changed, 322 insertions, 0 deletions
diff --git a/src/global/cfg_parser.c b/src/global/cfg_parser.c new file mode 100644 index 0000000..de006c7 --- /dev/null +++ b/src/global/cfg_parser.c @@ -0,0 +1,322 @@ +/*++ +/* NAME +/* cfg_parser 3 +/* SUMMARY +/* configuration parser utilities +/* SYNOPSIS +/* #include "cfg_parser.h" +/* +/* CFG_PARSER *cfg_parser_alloc(pname) +/* const char *pname; +/* +/* CFG_PARSER *cfg_parser_free(parser) +/* CFG_PARSER *parser; +/* +/* char *cfg_get_str(parser, name, defval, min, max) +/* const CFG_PARSER *parser; +/* const char *name; +/* const char *defval; +/* int min; +/* int max; +/* +/* int cfg_get_int(parser, name, defval, min, max) +/* const CFG_PARSER *parser; +/* const char *name; +/* int defval; +/* int min; +/* int max; +/* +/* int cfg_get_bool(parser, name, defval) +/* const CFG_PARSER *parser; +/* const char *name; +/* int defval; +/* +/* DICT_OWNER cfg_get_owner(parser) +/* const CFG_PARSER *parser; +/* DESCRIPTION +/* This module implements utilities for parsing parameters defined +/* either as "\fIname\fR = \fBvalue\fR" in a file pointed to by +/* \fIpname\fR (the old MySQL style), or as "\fIpname\fR_\fIname\fR = +/* \fBvalue\fR" in main.cf (the old LDAP style). It unifies the +/* two styles and provides support for range checking. +/* +/* \fIcfg_parser_alloc\fR initializes the parser. The result +/* is NULL if a configuration file could not be opened. +/* +/* \fIcfg_parser_free\fR releases the parser. +/* +/* \fIcfg_get_str\fR looks up a string. +/* +/* \fIcfg_get_int\fR looks up an integer. +/* +/* \fIcfg_get_bool\fR looks up a boolean value. +/* +/* \fIdefval\fR is returned when no value was found. \fImin\fR is +/* zero or specifies a lower limit on the integer value or string +/* length; \fImax\fR is zero or specifies an upper limit on the +/* integer value or string length. +/* +/* Conveniently, \fIcfg_get_str\fR returns \fBNULL\fR if +/* \fIdefval\fR is \fBNULL\fR and no value was found. The returned +/* string has to be freed by the caller if not \fBNULL\fR. +/* +/* cfg_get_owner() looks up the configuration file owner. +/* DIAGNOSTICS +/* Fatal errors: bad string length, malformed numerical value, malformed +/* boolean value. +/* SEE ALSO +/* mail_conf_str(3) string-valued global configuration parameter support +/* mail_conf_int(3) integer-valued configuration parameter support +/* mail_conf_bool(3) boolean-valued configuration parameter support +/* 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 +/* +/* Liviu Daia +/* Institute of Mathematics of the Romanian Academy +/* P.O. BOX 1-764 +/* RO-014700 Bucharest, ROMANIA +/*--*/ + +/* System library. */ + +#include "sys_defs.h" + +#include <stdlib.h> +#include <errno.h> +#include <string.h> + +#ifdef STRCASECMP_IN_STRINGS_H +#include <strings.h> +#endif + +/* Utility library. */ + +#include "msg.h" +#include "mymalloc.h" +#include "vstring.h" +#include "dict.h" + +/* Global library. */ + +#include "mail_conf.h" + +/* Application-specific. */ + +#include "cfg_parser.h" + +/* get string from file */ + +static char *get_dict_str(const struct CFG_PARSER *parser, + const char *name, const char *defval, + int min, int max) +{ + const char *strval; + int len; + + if ((strval = dict_lookup(parser->name, name)) == 0) + strval = defval; + + len = strlen(strval); + if (min && len < min) + msg_fatal("%s: bad string length %d < %d: %s = %s", + parser->name, len, min, name, strval); + if (max && len > max) + msg_fatal("%s: bad string length %d > %d: %s = %s", + parser->name, len, max, name, strval); + return (mystrdup(strval)); +} + +/* get string from main.cf */ + +static char *get_main_str(const struct CFG_PARSER *parser, + const char *name, const char *defval, + int min, int max) +{ + static VSTRING *buf = 0; + + if (buf == 0) + buf = vstring_alloc(15); + vstring_sprintf(buf, "%s_%s", parser->name, name); + return (get_mail_conf_str(vstring_str(buf), defval, min, max)); +} + +/* get integer from file */ + +static int get_dict_int(const struct CFG_PARSER *parser, + const char *name, int defval, int min, int max) +{ + const char *strval; + char *end; + int intval; + long longval; + + if ((strval = dict_lookup(parser->name, name)) != 0) { + errno = 0; + intval = longval = strtol(strval, &end, 10); + if (*strval == 0 || *end != 0 || errno == ERANGE || longval != intval) + msg_fatal("%s: bad numerical configuration: %s = %s", + parser->name, name, strval); + } else + intval = defval; + if (min && intval < min) + msg_fatal("%s: invalid %s parameter value %d < %d", + parser->name, name, intval, min); + if (max && intval > max) + msg_fatal("%s: invalid %s parameter value %d > %d", + parser->name, name, intval, max); + return (intval); +} + +/* get integer from main.cf */ + +static int get_main_int(const struct CFG_PARSER *parser, + const char *name, int defval, int min, int max) +{ + static VSTRING *buf = 0; + + if (buf == 0) + buf = vstring_alloc(15); + vstring_sprintf(buf, "%s_%s", parser->name, name); + return (get_mail_conf_int(vstring_str(buf), defval, min, max)); +} + +/* get boolean option from file */ + +static int get_dict_bool(const struct CFG_PARSER *parser, + const char *name, int defval) +{ + const char *strval; + int intval; + + if ((strval = dict_lookup(parser->name, name)) != 0) { + if (strcasecmp(strval, CONFIG_BOOL_YES) == 0) { + intval = 1; + } else if (strcasecmp(strval, CONFIG_BOOL_NO) == 0) { + intval = 0; + } else { + msg_fatal("%s: bad boolean configuration: %s = %s", + parser->name, name, strval); + } + } else + intval = defval; + return (intval); +} + +/* get boolean option from main.cf */ + +static int get_main_bool(const struct CFG_PARSER *parser, + const char *name, int defval) +{ + static VSTRING *buf = 0; + + if (buf == 0) + buf = vstring_alloc(15); + vstring_sprintf(buf, "%s_%s", parser->name, name); + return (get_mail_conf_bool(vstring_str(buf), defval)); +} + +/* initialize parser */ + +CFG_PARSER *cfg_parser_alloc(const char *pname) +{ + const char *myname = "cfg_parser_alloc"; + CFG_PARSER *parser; + DICT *dict; + + if (pname == 0 || *pname == 0) + msg_fatal("%s: null parser name", myname); + parser = (CFG_PARSER *) mymalloc(sizeof(*parser)); + parser->name = mystrdup(pname); + if (*parser->name == '/' || *parser->name == '.') { + if (dict_load_file_xt(parser->name, parser->name) == 0) { + myfree(parser->name); + myfree((void *) parser); + return (0); + } + parser->get_str = get_dict_str; + parser->get_int = get_dict_int; + parser->get_bool = get_dict_bool; + dict = dict_handle(parser->name); + } else { + parser->get_str = get_main_str; + parser->get_int = get_main_int; + parser->get_bool = get_main_bool; + dict = dict_handle(CONFIG_DICT); /* XXX Use proper API */ + } + if (dict == 0) + msg_panic("%s: dict_handle failed", myname); + parser->owner = dict->owner; + return (parser); +} + +/* get string */ + +char *cfg_get_str(const CFG_PARSER *parser, const char *name, + const char *defval, int min, int max) +{ + const char *myname = "cfg_get_str"; + char *strval; + + strval = parser->get_str(parser, name, (defval ? defval : ""), min, max); + if (defval == 0 && *strval == 0) { + /* the caller wants NULL instead of "" */ + myfree(strval); + strval = 0; + } + if (msg_verbose) + msg_info("%s: %s: %s = %s", myname, parser->name, name, + (strval ? strval : "<NULL>")); + return (strval); +} + +/* get integer */ + +int cfg_get_int(const CFG_PARSER *parser, const char *name, int defval, + int min, int max) +{ + const char *myname = "cfg_get_int"; + int intval; + + intval = parser->get_int(parser, name, defval, min, max); + if (msg_verbose) + msg_info("%s: %s: %s = %d", myname, parser->name, name, intval); + return (intval); +} + +/* get boolean option */ + +int cfg_get_bool(const CFG_PARSER *parser, const char *name, int defval) +{ + const char *myname = "cfg_get_bool"; + int intval; + + intval = parser->get_bool(parser, name, defval); + if (msg_verbose) + msg_info("%s: %s: %s = %s", myname, parser->name, name, + (intval ? "on" : "off")); + return (intval); +} + +/* release parser */ + +CFG_PARSER *cfg_parser_free(CFG_PARSER *parser) +{ + const char *myname = "cfg_parser_free"; + + if (parser->name == 0 || *parser->name == 0) + msg_panic("%s: null parser name", myname); + if (*parser->name == '/' || *parser->name == '.') { + if (dict_handle(parser->name)) + dict_unregister(parser->name); + } + myfree(parser->name); + myfree((void *) parser); + return (0); +} |