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/*
* Copyright (C) 2003 Manuel Novoa III
*
* Licensed under LGPL v2.1, see the file COPYING.LIB in this tarball for details.
*/
/* Nov 6, 2003 Initial version.
*
* NOTE: This implementation is quite strict about requiring all
* field seperators. It also does not allow leading whitespace
* except when processing the numeric fields. glibc is more
* lenient. See the various glibc difference comments below.
*
* TODO:
* Move to dynamic allocation of (currently staticly allocated)
* buffers; especially for the group-related functions since
* large group member lists will cause error returns.
*
*/
#define _GNU_SOURCE
#include <features.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <stddef.h>
#include <errno.h>
#include <assert.h>
#include <ctype.h>
#include <pwd.h>
#include <grp.h>
#include <paths.h>
#ifdef __HAS_SHADOW__
#include <shadow.h>
#endif
#ifdef __UCLIBC_HAS_THREADS__
#include <pthread.h>
#endif
/**********************************************************************/
/* Sizes for staticly allocated buffers. */
/* If you change these values, also change _SC_GETPW_R_SIZE_MAX and
* _SC_GETGR_R_SIZE_MAX in libc/unistd/sysconf.c to match */
#define PWD_BUFFER_SIZE 256
#define GRP_BUFFER_SIZE 256
/**********************************************************************/
/* Prototypes for internal functions. */
extern int __parsepwent(void *pw, char *line);
extern int __parsegrent(void *gr, char *line);
extern int __parsespent(void *sp, char *line);
extern int __pgsreader(int (*__parserfunc)(void *d, char *line), void *data,
char *__restrict line_buff, size_t buflen, FILE *f);
#ifndef GETXXKEY_R_FUNC
#error GETXXKEY_R_FUNC is not defined!
#endif
/**********************************************************************/
#ifdef GETXXKEY_R_FUNC
int GETXXKEY_R_FUNC(DO_GETXXKEY_R_KEYTYPE key,
GETXXKEY_R_ENTTYPE *__restrict resultbuf,
char *__restrict buffer, size_t buflen,
GETXXKEY_R_ENTTYPE **__restrict result)
{
FILE *stream;
int rv;
*result = NULL;
if (!(stream = fopen(DO_GETXXKEY_R_PATHNAME, "r"))) {
rv = errno;
} else {
__STDIO_SET_USER_LOCKING(stream);
do {
if (!(rv = __pgsreader(GETXXKEY_R_PARSER, resultbuf,
buffer, buflen, stream))
) {
if (GETXXKEY_R_TEST(resultbuf)) { /* Found key? */
*result = resultbuf;
break;
}
} else {
if (rv == ENOENT) { /* end-of-file encountered. */
rv = 0;
}
break;
}
} while (1);
fclose(stream);
}
return rv;
}
#endif
/**********************************************************************/
#undef GETXXKEY_R_FUNC
#undef GETXXKEY_R_PARSER
#undef GETXXKEY_R_ENTTYPE
#undef GETXXKEY_R_TEST
#undef DO_GETXXKEY_R_KEYTYPE
#undef DO_GETXXKEY_R_PATHNAME
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