mirror of
https://github.com/sheumann/hush.git
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25413bfe00
not in newlib, and also that all the _unlocked variants are kind of pointless in this context.
1105 lines
25 KiB
C
1105 lines
25 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 staticly 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 staticly 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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/**********************************************************************/
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/* For the various fget??ent_r funcs, return
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*
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* 0: success
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* ENOENT: end-of-file encountered
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* ERANGE: buflen too small
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* other error values possible. See __pgsreader.
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*
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* Also, *result == resultbuf on success and NULL on failure.
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*
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* NOTE: glibc difference - For the ENOENT case, glibc also sets errno.
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* We do not, as it really isn't an error if we reach the end-of-file.
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* Doing so is analogous to having fgetc() set errno on EOF.
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*/
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/**********************************************************************/
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#ifdef L_fgetpwent_r
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int fgetpwent_r(FILE *__restrict stream, struct passwd *__restrict resultbuf,
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char *__restrict buffer, size_t buflen,
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struct passwd **__restrict result)
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{
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int rv;
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*result = NULL;
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if (!(rv = __pgsreader(__parsepwent, resultbuf, buffer, buflen, stream))) {
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*result = resultbuf;
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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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#ifdef L_fgetgrent_r
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int fgetgrent_r(FILE *__restrict stream, struct group *__restrict resultbuf,
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char *__restrict buffer, size_t buflen,
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struct group **__restrict result)
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{
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int rv;
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*result = NULL;
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if (!(rv = __pgsreader(__parsegrent, resultbuf, buffer, buflen, stream))) {
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*result = resultbuf;
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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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#ifdef L_fgetspent_r
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int fgetspent_r(FILE *__restrict stream, struct spwd *__restrict resultbuf,
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char *__restrict buffer, size_t buflen,
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struct spwd **__restrict result)
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{
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int rv;
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*result = NULL;
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if (!(rv = __pgsreader(__parsespent, resultbuf, buffer, buflen, stream))) {
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*result = resultbuf;
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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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/* For the various fget??ent funcs, return NULL on failure and a
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* pointer to the appropriate struct (staticly allocated) on success.
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*/
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/**********************************************************************/
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#ifdef L_fgetpwent
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struct passwd *fgetpwent(FILE *stream)
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{
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static char buffer[PWD_BUFFER_SIZE];
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static struct passwd resultbuf;
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struct passwd *result;
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fgetpwent_r(stream, &resultbuf, buffer, sizeof(buffer), &result);
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return result;
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}
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#endif
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/**********************************************************************/
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#ifdef L_fgetgrent
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struct group *fgetgrent(FILE *stream)
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{
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static char buffer[GRP_BUFFER_SIZE];
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static struct group resultbuf;
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struct group *result;
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fgetgrent_r(stream, &resultbuf, buffer, sizeof(buffer), &result);
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return result;
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}
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#endif
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/**********************************************************************/
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#ifdef L_fgetspent
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extern int fgetspent_r(FILE *__restrict stream, struct spwd *__restrict resultbuf,
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char *__restrict buffer, size_t buflen,
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struct spwd **__restrict result);
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struct spwd *fgetspent(FILE *stream)
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{
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static char buffer[PWD_BUFFER_SIZE];
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static struct spwd resultbuf;
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struct spwd *result;
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fgetspent_r(stream, &resultbuf, buffer, sizeof(buffer), &result);
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return result;
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}
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#endif
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/**********************************************************************/
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#ifdef L_sgetspent_r
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int sgetspent_r(const char *string, struct spwd *result_buf,
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char *buffer, size_t buflen, struct spwd **result)
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{
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int rv = ERANGE;
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*result = NULL;
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if (buflen < PWD_BUFFER_SIZE) {
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DO_ERANGE:
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errno=rv;
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goto DONE;
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}
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if (string != buffer) {
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if (strlen(string) >= buflen) {
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goto DO_ERANGE;
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}
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strcpy(buffer, string);
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}
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if (!(rv = __parsespent(result_buf, buffer))) {
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*result = result_buf;
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}
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DONE:
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return rv;
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}
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#endif
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/**********************************************************************/
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#ifdef GETXXKEY_R_FUNC
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#error GETXXKEY_R_FUNC is already defined!
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#endif
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#ifdef L_getpwnam_r
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#define GETXXKEY_R_FUNC getpwnam_r
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#define GETXXKEY_R_PARSER __parsepwent
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#define GETXXKEY_R_ENTTYPE struct passwd
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#define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->pw_name, key))
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#define DO_GETXXKEY_R_KEYTYPE const char *__restrict
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#define DO_GETXXKEY_R_PATHNAME _PATH_PASSWD
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#endif
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#ifdef L_getgrnam_r
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#define GETXXKEY_R_FUNC getgrnam_r
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#define GETXXKEY_R_PARSER __parsegrent
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#define GETXXKEY_R_ENTTYPE struct group
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#define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->gr_name, key))
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#define DO_GETXXKEY_R_KEYTYPE const char *__restrict
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#define DO_GETXXKEY_R_PATHNAME _PATH_GROUP
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#endif
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#ifdef L_getspnam_r
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#define GETXXKEY_R_FUNC getspnam_r
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#define GETXXKEY_R_PARSER __parsespent
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#define GETXXKEY_R_ENTTYPE struct spwd
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#define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->sp_namp, key))
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#define DO_GETXXKEY_R_KEYTYPE const char *__restrict
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#define DO_GETXXKEY_R_PATHNAME _PATH_SHADOW
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#endif
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#ifdef L_getpwuid_r
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#define GETXXKEY_R_FUNC getpwuid_r
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#define GETXXKEY_R_PARSER __parsepwent
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#define GETXXKEY_R_ENTTYPE struct passwd
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#define GETXXKEY_R_TEST(ENT) ((ENT)->pw_uid == key)
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#define DO_GETXXKEY_R_KEYTYPE uid_t
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#define DO_GETXXKEY_R_PATHNAME _PATH_PASSWD
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#endif
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#ifdef L_getgrgid_r
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#define GETXXKEY_R_FUNC getgrgid_r
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#define GETXXKEY_R_PARSER __parsegrent
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#define GETXXKEY_R_ENTTYPE struct group
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#define GETXXKEY_R_TEST(ENT) ((ENT)->gr_gid == key)
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#define DO_GETXXKEY_R_KEYTYPE gid_t
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#define DO_GETXXKEY_R_PATHNAME _PATH_GROUP
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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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#ifdef L_getpwuid
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struct passwd *getpwuid(uid_t uid)
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{
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static char buffer[PWD_BUFFER_SIZE];
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static struct passwd resultbuf;
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struct passwd *result;
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getpwuid_r(uid, &resultbuf, buffer, sizeof(buffer), &result);
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return result;
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}
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#endif
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/**********************************************************************/
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#ifdef L_getgrgid
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struct group *getgrgid(gid_t gid)
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{
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static char buffer[GRP_BUFFER_SIZE];
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static struct group resultbuf;
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struct group *result;
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getgrgid_r(gid, &resultbuf, buffer, sizeof(buffer), &result);
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return result;
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}
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#endif
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/**********************************************************************/
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#ifdef L_getspuid_r
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/* This function is non-standard and is currently not built. It seems
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* to have been created as a reentrant version of the non-standard
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* functions getspuid. Why getspuid was added, I do not know. */
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int getspuid_r(uid_t uid, struct spwd *__restrict resultbuf,
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char *__restrict buffer, size_t buflen,
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struct spwd **__restrict result)
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{
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int rv;
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struct passwd *pp;
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struct passwd password;
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char pwd_buff[PWD_BUFFER_SIZE];
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*result = NULL;
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if (!(rv = getpwuid_r(uid, &password, pwd_buff, sizeof(pwd_buff), &pp))) {
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rv = getspnam_r(password.pw_name, resultbuf, buffer, buflen, result);
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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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#ifdef L_getspuid
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/* This function is non-standard and is currently not built.
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* Why it was added, I do not know. */
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struct spwd *getspuid(uid_t uid)
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{
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static char buffer[PWD_BUFFER_SIZE];
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static struct spwd resultbuf;
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struct spwd *result;
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getspuid_r(uid, &resultbuf, buffer, sizeof(buffer), &result);
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return result;
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}
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#endif
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/**********************************************************************/
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#ifdef L_getpwnam
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struct passwd *getpwnam(const char *name)
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{
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static char buffer[PWD_BUFFER_SIZE];
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static struct passwd resultbuf;
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struct passwd *result;
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getpwnam_r(name, &resultbuf, buffer, sizeof(buffer), &result);
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return result;
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}
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#endif
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/**********************************************************************/
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#ifdef L_getgrnam
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struct group *getgrnam(const char *name)
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{
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static char buffer[GRP_BUFFER_SIZE];
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static struct group resultbuf;
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struct group *result;
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getgrnam_r(name, &resultbuf, buffer, sizeof(buffer), &result);
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return result;
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}
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#endif
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/**********************************************************************/
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#ifdef L_getspnam
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struct spwd *getspnam(const char *name)
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{
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static char buffer[PWD_BUFFER_SIZE];
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static struct spwd resultbuf;
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struct spwd *result;
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getspnam_r(name, &resultbuf, buffer, sizeof(buffer), &result);
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return result;
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}
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#endif
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/**********************************************************************/
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#ifdef L_getpw
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int getpw(uid_t uid, char *buf)
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{
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struct passwd resultbuf;
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struct passwd *result;
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char buffer[PWD_BUFFER_SIZE];
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if (!buf) {
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errno=EINVAL;
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} else if (!getpwuid_r(uid, &resultbuf, buffer, sizeof(buffer), &result)) {
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if (sprintf(buf, "%s:%s:%lu:%lu:%s:%s:%s\n",
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resultbuf.pw_name, resultbuf.pw_passwd,
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(unsigned long)(resultbuf.pw_uid),
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(unsigned long)(resultbuf.pw_gid),
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resultbuf.pw_gecos, resultbuf.pw_dir,
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resultbuf.pw_shell) >= 0
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) {
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return 0;
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}
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}
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return -1;
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}
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|
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#endif
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/**********************************************************************/
|
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#ifdef L_getpwent_r
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static FILE *pwf /*= NULL*/;
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void setpwent(void)
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{
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if (pwf) {
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rewind(pwf);
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}
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}
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void endpwent(void)
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{
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if (pwf) {
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fclose(pwf);
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pwf = NULL;
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}
|
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}
|
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|
|
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int getpwent_r(struct passwd *__restrict resultbuf,
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char *__restrict buffer, size_t buflen,
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struct passwd **__restrict result)
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{
|
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int rv;
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|
|
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*result = NULL; /* In case of error... */
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|
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if (!pwf) {
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if (!(pwf = fopen(_PATH_PASSWD, "r"))) {
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rv = errno;
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goto ERR;
|
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}
|
|
}
|
|
|
|
if (!(rv = __pgsreader(__parsepwent, resultbuf,
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buffer, buflen, pwf))) {
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*result = resultbuf;
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|
}
|
|
|
|
ERR:
|
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return rv;
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|
}
|
|
|
|
#endif
|
|
/**********************************************************************/
|
|
#ifdef L_getgrent_r
|
|
|
|
static FILE *grf /*= NULL*/;
|
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void setgrent(void)
|
|
{
|
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if (grf) {
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rewind(grf);
|
|
}
|
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}
|
|
|
|
void endgrent(void)
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{
|
|
if (grf) {
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fclose(grf);
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grf = NULL;
|
|
}
|
|
}
|
|
|
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int getgrent_r(struct group *__restrict resultbuf,
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char *__restrict buffer, size_t buflen,
|
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struct group **__restrict result)
|
|
{
|
|
int rv;
|
|
|
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*result = NULL; /* In case of error... */
|
|
|
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if (!grf) {
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if (!(grf = fopen(_PATH_GROUP, "r"))) {
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rv = errno;
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goto ERR;
|
|
}
|
|
}
|
|
|
|
if (!(rv = __pgsreader(__parsegrent, resultbuf,
|
|
buffer, buflen, grf))) {
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|
*result = resultbuf;
|
|
}
|
|
|
|
ERR:
|
|
return rv;
|
|
}
|
|
|
|
#endif
|
|
/**********************************************************************/
|
|
#ifdef L_getspent_r
|
|
|
|
static FILE *spf /*= NULL*/;
|
|
void setspent(void)
|
|
{
|
|
if (spf) {
|
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rewind(spf);
|
|
}
|
|
}
|
|
|
|
void endspent(void)
|
|
{
|
|
if (spf) {
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fclose(spf);
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|
spf = NULL;
|
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}
|
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}
|
|
|
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int getspent_r(struct spwd *resultbuf, char *buffer,
|
|
size_t buflen, struct spwd **result)
|
|
{
|
|
int rv;
|
|
|
|
*result = NULL; /* In case of error... */
|
|
|
|
if (!spf) {
|
|
if (!(spf = fopen(_PATH_SHADOW, "r"))) {
|
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rv = errno;
|
|
goto ERR;
|
|
}
|
|
}
|
|
|
|
if (!(rv = __pgsreader(__parsespent, resultbuf,
|
|
buffer, buflen, spf))) {
|
|
*result = resultbuf;
|
|
}
|
|
|
|
ERR:
|
|
return rv;
|
|
}
|
|
|
|
#endif
|
|
/**********************************************************************/
|
|
#ifdef L_getpwent
|
|
|
|
struct passwd *getpwent(void)
|
|
{
|
|
static char line_buff[PWD_BUFFER_SIZE];
|
|
static struct passwd pwd;
|
|
struct passwd *result;
|
|
|
|
getpwent_r(&pwd, line_buff, sizeof(line_buff), &result);
|
|
return result;
|
|
}
|
|
|
|
#endif
|
|
/**********************************************************************/
|
|
#ifdef L_getgrent
|
|
|
|
struct group *getgrent(void)
|
|
{
|
|
static char line_buff[GRP_BUFFER_SIZE];
|
|
static struct group gr;
|
|
struct group *result;
|
|
|
|
getgrent_r(&gr, line_buff, sizeof(line_buff), &result);
|
|
return result;
|
|
}
|
|
|
|
#endif
|
|
/**********************************************************************/
|
|
#ifdef L_getspent
|
|
|
|
struct spwd *getspent(void)
|
|
{
|
|
static char line_buff[PWD_BUFFER_SIZE];
|
|
static struct spwd spwd;
|
|
struct spwd *result;
|
|
|
|
getspent_r(&spwd, line_buff, sizeof(line_buff), &result);
|
|
return result;
|
|
}
|
|
|
|
#endif
|
|
/**********************************************************************/
|
|
#ifdef L_sgetspent
|
|
|
|
struct spwd *sgetspent(const char *string)
|
|
{
|
|
static char line_buff[PWD_BUFFER_SIZE];
|
|
static struct spwd spwd;
|
|
struct spwd *result;
|
|
|
|
sgetspent_r(string, &spwd, line_buff, sizeof(line_buff), &result);
|
|
return result;
|
|
}
|
|
|
|
#endif
|
|
/**********************************************************************/
|
|
#ifdef L_initgroups
|
|
|
|
int initgroups(const char *user, gid_t gid)
|
|
{
|
|
FILE *grf;
|
|
gid_t *group_list;
|
|
int num_groups, rv;
|
|
char **m;
|
|
struct group group;
|
|
char buff[PWD_BUFFER_SIZE];
|
|
|
|
rv = -1;
|
|
|
|
/* We alloc space for 8 gids at a time. */
|
|
if (((group_list = (gid_t *) malloc(8*sizeof(gid_t *))) != NULL)
|
|
&& ((grf = fopen(_PATH_GROUP, "r")) != NULL)
|
|
) {
|
|
|
|
*group_list = gid;
|
|
num_groups = 1;
|
|
|
|
while (!__pgsreader(__parsegrent, &group, buff, sizeof(buff), grf)) {
|
|
assert(group.gr_mem); /* Must have at least a NULL terminator. */
|
|
if (group.gr_gid != gid) {
|
|
for (m=group.gr_mem ; *m ; m++) {
|
|
if (!strcmp(*m, user)) {
|
|
if (!(num_groups & 7)) {
|
|
gid_t *tmp = (gid_t *)
|
|
realloc(group_list,
|
|
(num_groups+8) * sizeof(gid_t *));
|
|
if (!tmp) {
|
|
rv = -1;
|
|
goto DO_CLOSE;
|
|
}
|
|
group_list = tmp;
|
|
}
|
|
group_list[num_groups++] = group.gr_gid;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
rv = setgroups(num_groups, group_list);
|
|
DO_CLOSE:
|
|
fclose(grf);
|
|
}
|
|
|
|
/* group_list will be NULL if initial malloc failed, which may trigger
|
|
* warnings from various malloc debuggers. */
|
|
free(group_list);
|
|
return rv;
|
|
}
|
|
|
|
#endif
|
|
/**********************************************************************/
|
|
#ifdef L_putpwent
|
|
|
|
int putpwent(const struct passwd *__restrict p, FILE *__restrict f)
|
|
{
|
|
int rv = -1;
|
|
|
|
if (!p || !f) {
|
|
errno=EINVAL;
|
|
} else {
|
|
/* No extra thread locking is needed above what fprintf does. */
|
|
if (fprintf(f, "%s:%s:%lu:%lu:%s:%s:%s\n",
|
|
p->pw_name, p->pw_passwd,
|
|
(unsigned long)(p->pw_uid),
|
|
(unsigned long)(p->pw_gid),
|
|
p->pw_gecos, p->pw_dir, p->pw_shell) >= 0
|
|
) {
|
|
rv = 0;
|
|
}
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
#endif
|
|
/**********************************************************************/
|
|
#ifdef L_putgrent
|
|
|
|
int putgrent(const struct group *__restrict p, FILE *__restrict f)
|
|
{
|
|
static const char format[] = ",%s";
|
|
char **m;
|
|
const char *fmt;
|
|
int rv = -1;
|
|
|
|
if (!p || !f) { /* Sigh... glibc checks. */
|
|
errno=EINVAL;
|
|
} else {
|
|
if (fprintf(f, "%s:%s:%lu:",
|
|
p->gr_name, p->gr_passwd,
|
|
(unsigned long)(p->gr_gid)) >= 0
|
|
) {
|
|
|
|
fmt = format + 1;
|
|
|
|
assert(p->gr_mem);
|
|
m = p->gr_mem;
|
|
|
|
do {
|
|
if (!*m) {
|
|
if (fputc('\n', f) >= 0) {
|
|
rv = 0;
|
|
}
|
|
break;
|
|
}
|
|
if (fprintf(f, fmt, *m) < 0) {
|
|
break;
|
|
}
|
|
++m;
|
|
fmt = format;
|
|
} while (1);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
#endif
|
|
/**********************************************************************/
|
|
#ifdef L_putspent
|
|
|
|
static const unsigned char sp_off[] = {
|
|
offsetof(struct spwd, sp_lstchg), /* 2 - not a char ptr */
|
|
offsetof(struct spwd, sp_min), /* 3 - not a char ptr */
|
|
offsetof(struct spwd, sp_max), /* 4 - not a char ptr */
|
|
offsetof(struct spwd, sp_warn), /* 5 - not a char ptr */
|
|
offsetof(struct spwd, sp_inact), /* 6 - not a char ptr */
|
|
offsetof(struct spwd, sp_expire), /* 7 - not a char ptr */
|
|
};
|
|
|
|
int putspent(const struct spwd *p, FILE *stream)
|
|
{
|
|
static const char ld_format[] = "%ld:";
|
|
const char *f;
|
|
long int x;
|
|
int i;
|
|
int rv = -1;
|
|
|
|
/* Unlike putpwent and putgrent, glibc does not check the args. */
|
|
if (fprintf(stream, "%s:%s:", p->sp_namp,
|
|
(p->sp_pwdp ? p->sp_pwdp : "")) < 0
|
|
) {
|
|
goto DO_UNLOCK;
|
|
}
|
|
|
|
for (i=0 ; i < sizeof(sp_off) ; i++) {
|
|
f = ld_format;
|
|
if ((x = *(const long int *)(((const char *) p) + sp_off[i])) == -1) {
|
|
f += 3;
|
|
}
|
|
if (fprintf(stream, f, x) < 0) {
|
|
goto DO_UNLOCK;
|
|
}
|
|
}
|
|
|
|
if ((p->sp_flag != ~0UL) && (fprintf(stream, "%lu", p->sp_flag) < 0)) {
|
|
goto DO_UNLOCK;
|
|
}
|
|
|
|
if (fputc('\n', stream) > 0) {
|
|
rv = 0;
|
|
}
|
|
|
|
DO_UNLOCK:
|
|
return rv;
|
|
}
|
|
|
|
#endif
|
|
/**********************************************************************/
|
|
/* Internal uClibc functions. */
|
|
/**********************************************************************/
|
|
#ifdef L___parsepwent
|
|
|
|
static const unsigned char pw_off[] = {
|
|
offsetof(struct passwd, pw_name), /* 0 */
|
|
offsetof(struct passwd, pw_passwd), /* 1 */
|
|
offsetof(struct passwd, pw_uid), /* 2 - not a char ptr */
|
|
offsetof(struct passwd, pw_gid), /* 3 - not a char ptr */
|
|
offsetof(struct passwd, pw_gecos), /* 4 */
|
|
offsetof(struct passwd, pw_dir), /* 5 */
|
|
offsetof(struct passwd, pw_shell) /* 6 */
|
|
};
|
|
|
|
int __parsepwent(void *data, char *line)
|
|
{
|
|
char *endptr;
|
|
char *p;
|
|
int i;
|
|
|
|
i = 0;
|
|
do {
|
|
p = ((char *) ((struct passwd *) data)) + pw_off[i];
|
|
|
|
if ((i & 6) ^ 2) { /* i!=2 and i!=3 */
|
|
*((char **) p) = line;
|
|
if (i==6) {
|
|
return 0;
|
|
}
|
|
/* NOTE: glibc difference - glibc allows omission of
|
|
* ':' seperators after the gid field if all remaining
|
|
* entries are empty. We require all separators. */
|
|
if (!(line = strchr(line, ':'))) {
|
|
break;
|
|
}
|
|
} else {
|
|
unsigned long t = strtoul(line, &endptr, 10);
|
|
/* Make sure we had at least one digit, and that the
|
|
* failing char is the next field seperator ':'. See
|
|
* glibc difference note above. */
|
|
/* TODO: Also check for leading whitespace? */
|
|
if ((endptr == line) || (*endptr != ':')) {
|
|
break;
|
|
}
|
|
line = endptr;
|
|
if (i & 1) { /* i == 3 -- gid */
|
|
*((gid_t *) p) = t;
|
|
} else { /* i == 2 -- uid */
|
|
*((uid_t *) p) = t;
|
|
}
|
|
}
|
|
|
|
*line++ = 0;
|
|
++i;
|
|
} while (1);
|
|
|
|
return -1;
|
|
}
|
|
|
|
#endif
|
|
/**********************************************************************/
|
|
#ifdef L___parsegrent
|
|
|
|
static const unsigned char gr_off[] = {
|
|
offsetof(struct group, gr_name), /* 0 */
|
|
offsetof(struct group, gr_passwd), /* 1 */
|
|
offsetof(struct group, gr_gid) /* 2 - not a char ptr */
|
|
};
|
|
|
|
int __parsegrent(void *data, char *line)
|
|
{
|
|
char *endptr;
|
|
char *p;
|
|
int i;
|
|
char **members;
|
|
char *end_of_buf;
|
|
|
|
end_of_buf = ((struct group *) data)->gr_name; /* Evil hack! */
|
|
i = 0;
|
|
do {
|
|
p = ((char *) ((struct group *) data)) + gr_off[i];
|
|
|
|
if (i < 2) {
|
|
*((char **) p) = line;
|
|
if (!(line = strchr(line, ':'))) {
|
|
break;
|
|
}
|
|
*line++ = 0;
|
|
++i;
|
|
} else {
|
|
*((gid_t *) p) = strtoul(line, &endptr, 10);
|
|
|
|
/* NOTE: glibc difference - glibc allows omission of the
|
|
* trailing colon when there is no member list. We treat
|
|
* this as an error. */
|
|
|
|
/* Make sure we had at least one digit, and that the
|
|
* failing char is the next field seperator ':'. See
|
|
* glibc difference note above. */
|
|
if ((endptr == line) || (*endptr != ':')) {
|
|
break;
|
|
}
|
|
|
|
i = 1; /* Count terminating NULL ptr. */
|
|
p = endptr;
|
|
|
|
if (p[1]) { /* We have a member list to process. */
|
|
/* Overwrite the last ':' with a ',' before counting.
|
|
* This allows us to test for initial ',' and adds
|
|
* one ',' so that the ',' count equals the member
|
|
* count. */
|
|
*p = ',';
|
|
do {
|
|
/* NOTE: glibc difference - glibc allows and trims leading
|
|
* (but not trailing) space. We treat this as an error. */
|
|
/* NOTE: glibc difference - glibc allows consecutive and
|
|
* trailing commas, and ignores "empty string" users. We
|
|
* treat this as an error. */
|
|
if (*p == ',') {
|
|
++i;
|
|
*p = 0; /* nul-terminate each member string. */
|
|
if (!*++p || (*p == ',') || isspace(*p)) {
|
|
goto ERR;
|
|
}
|
|
}
|
|
} while (*++p);
|
|
}
|
|
|
|
/* Now align (p+1), rounding up. */
|
|
/* Assumes sizeof(char **) is a power of 2. */
|
|
members = (char **)( (((intptr_t) p) + sizeof(char **))
|
|
& ~((intptr_t)(sizeof(char **) - 1)) );
|
|
|
|
if (((char *)(members + i)) > end_of_buf) { /* No space. */
|
|
break;
|
|
}
|
|
|
|
((struct group *) data)->gr_mem = members;
|
|
|
|
if (--i) {
|
|
p = endptr; /* Pointing to char prior to first member. */
|
|
do {
|
|
*members++ = ++p;
|
|
if (!--i) break;
|
|
while (*++p) {}
|
|
} while (1);
|
|
}
|
|
*members = NULL;
|
|
|
|
return 0;
|
|
}
|
|
} while (1);
|
|
|
|
ERR:
|
|
return -1;
|
|
}
|
|
|
|
#endif
|
|
/**********************************************************************/
|
|
#ifdef L___parsespent
|
|
|
|
static const unsigned char sp_off[] = {
|
|
offsetof(struct spwd, sp_namp), /* 0 */
|
|
offsetof(struct spwd, sp_pwdp), /* 1 */
|
|
offsetof(struct spwd, sp_lstchg), /* 2 - not a char ptr */
|
|
offsetof(struct spwd, sp_min), /* 3 - not a char ptr */
|
|
offsetof(struct spwd, sp_max), /* 4 - not a char ptr */
|
|
offsetof(struct spwd, sp_warn), /* 5 - not a char ptr */
|
|
offsetof(struct spwd, sp_inact), /* 6 - not a char ptr */
|
|
offsetof(struct spwd, sp_expire), /* 7 - not a char ptr */
|
|
offsetof(struct spwd, sp_flag) /* 8 - not a char ptr */
|
|
};
|
|
|
|
int __parsespent(void *data, char * line)
|
|
{
|
|
char *endptr;
|
|
char *p;
|
|
int i;
|
|
|
|
i = 0;
|
|
do {
|
|
p = ((char *) ((struct spwd *) data)) + sp_off[i];
|
|
if (i < 2) {
|
|
*((char **) p) = line;
|
|
if (!(line = strchr(line, ':'))) {
|
|
break;
|
|
}
|
|
} else {
|
|
#if 0
|
|
if (i==5) { /* Support for old format. */
|
|
while (isspace(*line)) ++line; /* glibc eats space here. */
|
|
if (!*line) {
|
|
((struct spwd *) data)->sp_warn = -1;
|
|
((struct spwd *) data)->sp_inact = -1;
|
|
((struct spwd *) data)->sp_expire = -1;
|
|
((struct spwd *) data)->sp_flag = ~0UL;
|
|
return 0;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
*((long *) p) = (long) strtoul(line, &endptr, 10);
|
|
|
|
if (endptr == line) {
|
|
*((long *) p) = ((i != 8) ? -1L : ((long)(~0UL)));
|
|
}
|
|
|
|
line = endptr;
|
|
|
|
if (i == 8) {
|
|
if (!*endptr) {
|
|
return 0;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if (*endptr != ':') {
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
*line++ = 0;
|
|
++i;
|
|
} while (1);
|
|
|
|
return EINVAL;
|
|
}
|
|
|
|
#endif
|
|
/**********************************************************************/
|
|
#ifdef L___pgsreader
|
|
|
|
/* Reads until if EOF, or until if finds a line which fits in the buffer
|
|
* and for which the parser function succeeds.
|
|
*
|
|
* Returns 0 on success and ENOENT for end-of-file (glibc concession).
|
|
*/
|
|
|
|
int __pgsreader(int (*__parserfunc)(void *d, char *line), void *data,
|
|
char *__restrict line_buff, size_t buflen, FILE *f)
|
|
{
|
|
int line_len;
|
|
int skip;
|
|
int rv = ERANGE;
|
|
|
|
if (buflen < PWD_BUFFER_SIZE) {
|
|
errno=rv;
|
|
} else {
|
|
skip = 0;
|
|
do {
|
|
if (!fgets(line_buff, buflen, f)) {
|
|
if (feof(f)) {
|
|
rv = ENOENT;
|
|
}
|
|
break;
|
|
}
|
|
|
|
line_len = strlen(line_buff) - 1; /* strlen() must be > 0. */
|
|
if (line_buff[line_len] == '\n') {
|
|
line_buff[line_len] = 0;
|
|
} else if (line_len + 2 == buflen) { /* line too long */
|
|
++skip;
|
|
continue;
|
|
}
|
|
|
|
if (skip) {
|
|
--skip;
|
|
continue;
|
|
}
|
|
|
|
/* NOTE: glibc difference - glibc strips leading whitespace from
|
|
* records. We do not allow leading whitespace. */
|
|
|
|
/* Skip empty lines, comment lines, and lines with leading
|
|
* whitespace. */
|
|
if (*line_buff && (*line_buff != '#') && !isspace(*line_buff)) {
|
|
if (__parserfunc == __parsegrent) { /* Do evil group hack. */
|
|
/* The group entry parsing function needs to know where
|
|
* the end of the buffer is so that it can construct the
|
|
* group member ptr table. */
|
|
((struct group *) data)->gr_name = line_buff + buflen;
|
|
}
|
|
|
|
if (!__parserfunc(data, line_buff)) {
|
|
rv = 0;
|
|
break;
|
|
}
|
|
}
|
|
} while (1);
|
|
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
#endif
|
|
/**********************************************************************/
|