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