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101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
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/* nss_cdb.h: nss_cdb common include file.
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*
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* This file is a part of tinycdb package by Michael Tokarev, mjt@corpit.ru.
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* Public domain.
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*/
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#include <sys/types.h>
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#include <stdlib.h>
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#include <nss.h>
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#include "cdb.h"
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#ifndef NSSCDB_DIR
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# define NSSCDB_DIR "/etc"
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#endif
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#ifndef NSSCDB_DB
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# define NSSCDB_DB(name) NSSCDB_DIR "/" name ".cdb"
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#endif
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typedef int (nss_parse_fn)(void *result, char *buf, size_t bufl);
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struct nss_cdb {
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nss_parse_fn *parsefn;
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const char *dbname;
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int keepopen;
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unsigned lastpos;
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struct cdb cdb;
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};
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enum nss_status
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__nss_cdb_setent(struct nss_cdb *dbp, int stayopen);
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enum nss_status
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__nss_cdb_endent(struct nss_cdb *dbp);
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enum nss_status
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__nss_cdb_getent(struct nss_cdb *dbp,
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void *result, char *buf, size_t bufl, int *errnop);
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enum nss_status
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__nss_cdb_byname(struct nss_cdb *dbp, const char *name,
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void *result, char *buf, size_t bufl, int *errnop);
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enum nss_status
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__nss_cdb_byid(struct nss_cdb *dbp, unsigned long id,
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void *result, char *buf, size_t bufl, int *errnop);
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#define nss_common(dbname,structname,entname) \
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static int \
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nss_##dbname##_parse(structname *result, char *buf, size_t bufl); \
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static struct nss_cdb db = { \
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(nss_parse_fn*)&nss_##dbname##_parse, \
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NSSCDB_DB(#dbname),0,0,CDB_STATIC_INIT}; \
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enum nss_status _nss_cdb_set##entname(int stayopen) { \
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return __nss_cdb_setent(&db, stayopen); \
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} \
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enum nss_status _nss_cdb_end##entname(void) { \
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return __nss_cdb_endent(&db); \
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} \
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enum nss_status \
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_nss_cdb_get##entname##_r(structname *result, \
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char *buf, size_t bufl, int *errnop) { \
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return __nss_cdb_getent(&db, result, buf, bufl, errnop); \
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}
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#define nss_getbyname(getbyname, structname) \
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enum nss_status \
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_nss_cdb_##getbyname##_r(const char *name, structname *result, \
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char *buf, size_t bufl, int *errnop) { \
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return __nss_cdb_byname(&db, name, result, buf, bufl, errnop); \
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}
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#define nss_getbyid(getbyid, structname, idtype) \
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enum nss_status \
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_nss_cdb_##getbyid##_r(idtype id, structname *result, \
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char *buf, size_t bufl, int *errnop) { \
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return __nss_cdb_byid(&db, id, result, buf, bufl, errnop); \
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}
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#define STRING_FIELD(line, variable) \
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variable = line; \
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while(*line != ':') \
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if (!*line++) return -1; \
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*line++ = '\0'
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#define INT_FIELD(line, variable, convert) \
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{ \
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char *endp; \
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variable = convert(strtoul(line, &endp, 10)); \
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if (endp == line) return -1; \
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if (*endp++ != ':') return -1; \
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line = endp; \
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}
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#define INT_FIELD_MAYBE_NULL(line, variable, convert, default) \
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{ \
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char *endp; \
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if (!*line) return -1; \
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variable = convert(strtoul(line, &endp, 10)); \
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if (*endp != ':') return -1; \
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if (endp == line) variable = convert(default); \
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line = endp; \
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}
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