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authorGravatar Eric Andersen <andersen@codepoet.org>2004-07-15 12:53:49 +0000
committerGravatar Eric Andersen <andersen@codepoet.org>2004-07-15 12:53:49 +0000
commit9615a08218caa63c4221a6b5922c628328e719d1 (patch)
tree863532a14dd40a1009cee3dac1dfa7fdd8bea653 /libpwdgrp/pwd_grp.c
parent837f058fb307e0bcf7b9ad4f02a44ea3047f427e (diff)
downloadbusybox-9615a08218caa63c4221a6b5922c628328e719d1.tar.gz
busybox-9615a08218caa63c4221a6b5922c628328e719d1.tar.bz2
Replace the old and somewhat buggy pwd_grp stuff with the shiny
new stuff mjn3 wrote for uClibc
Diffstat (limited to 'libpwdgrp/pwd_grp.c')
-rw-r--r--libpwdgrp/pwd_grp.c1116
1 files changed, 1116 insertions, 0 deletions
diff --git a/libpwdgrp/pwd_grp.c b/libpwdgrp/pwd_grp.c
new file mode 100644
index 000000000..9412faeb4
--- /dev/null
+++ b/libpwdgrp/pwd_grp.c
@@ -0,0 +1,1116 @@
+/* Copyright (C) 2003 Manuel Novoa III
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* 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.
+ *
+ */
+
+#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 "busybox.h"
+#include "pwd_.h"
+#include "grp_.h"
+#include "shadow_.h"
+
+#ifndef _PATH_SHADOW
+#define _PATH_SHADOW "/etc/shadow"
+#endif
+#ifndef _PATH_PASSWD
+#define _PATH_PASSWD "/etc/passwd"
+#endif
+#ifndef _PATH_GROUP
+#define _PATH_GROUP "/etc/group"
+#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);
+
+/**********************************************************************/
+/* For the various fget??ent_r funcs, return
+ *
+ * 0: success
+ * ENOENT: end-of-file encountered
+ * ERANGE: buflen too small
+ * other error values possible. See __pgsreader.
+ *
+ * Also, *result == resultbuf on success and NULL on failure.
+ *
+ * NOTE: glibc difference - For the ENOENT case, glibc also sets errno.
+ * We do not, as it really isn't an error if we reach the end-of-file.
+ * Doing so is analogous to having fgetc() set errno on EOF.
+ */
+/**********************************************************************/
+#ifdef L_fgetpwent_r
+
+int fgetpwent_r(FILE *__restrict stream, struct passwd *__restrict resultbuf,
+ char *__restrict buffer, size_t buflen,
+ struct passwd **__restrict result)
+{
+ int rv;
+
+ *result = NULL;
+
+ if (!(rv = __pgsreader(__parsepwent, resultbuf, buffer, buflen, stream))) {
+ *result = resultbuf;
+ }
+
+ return rv;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_fgetgrent_r
+
+int fgetgrent_r(FILE *__restrict stream, struct group *__restrict resultbuf,
+ char *__restrict buffer, size_t buflen,
+ struct group **__restrict result)
+{
+ int rv;
+
+ *result = NULL;
+
+ if (!(rv = __pgsreader(__parsegrent, resultbuf, buffer, buflen, stream))) {
+ *result = resultbuf;
+ }
+
+ return rv;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_fgetspent_r
+
+int fgetspent_r(FILE *__restrict stream, struct spwd *__restrict resultbuf,
+ char *__restrict buffer, size_t buflen,
+ struct spwd **__restrict result)
+{
+ int rv;
+
+ *result = NULL;
+
+ if (!(rv = __pgsreader(__parsespent, resultbuf, buffer, buflen, stream))) {
+ *result = resultbuf;
+ }
+
+ return rv;
+}
+
+#endif
+/**********************************************************************/
+/* For the various fget??ent funcs, return NULL on failure and a
+ * pointer to the appropriate struct (staticly allocated) on success.
+ */
+/**********************************************************************/
+#ifdef L_fgetpwent
+
+struct passwd *fgetpwent(FILE *stream)
+{
+ static char buffer[PWD_BUFFER_SIZE];
+ static struct passwd resultbuf;
+ struct passwd *result;
+
+ fgetpwent_r(stream, &resultbuf, buffer, sizeof(buffer), &result);
+ return result;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_fgetgrent
+
+struct group *fgetgrent(FILE *stream)
+{
+ static char buffer[GRP_BUFFER_SIZE];
+ static struct group resultbuf;
+ struct group *result;
+
+ fgetgrent_r(stream, &resultbuf, buffer, sizeof(buffer), &result);
+ return result;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_fgetspent
+
+extern int fgetspent_r(FILE *__restrict stream, struct spwd *__restrict resultbuf,
+ char *__restrict buffer, size_t buflen,
+ struct spwd **__restrict result);
+struct spwd *fgetspent(FILE *stream)
+{
+ static char buffer[PWD_BUFFER_SIZE];
+ static struct spwd resultbuf;
+ struct spwd *result;
+
+ fgetspent_r(stream, &resultbuf, buffer, sizeof(buffer), &result);
+ return result;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_sgetspent_r
+
+int sgetspent_r(const char *string, struct spwd *result_buf,
+ char *buffer, size_t buflen, struct spwd **result)
+{
+ int rv = ERANGE;
+
+ *result = NULL;
+
+ if (buflen < PWD_BUFFER_SIZE) {
+ DO_ERANGE:
+ errno=rv;
+ goto DONE;
+ }
+
+ if (string != buffer) {
+ if (strlen(string) >= buflen) {
+ goto DO_ERANGE;
+ }
+ strcpy(buffer, string);
+ }
+
+ if (!(rv = __parsespent(result_buf, buffer))) {
+ *result = result_buf;
+ }
+
+ DONE:
+ return rv;
+}
+
+#endif
+/**********************************************************************/
+
+#ifdef GETXXKEY_R_FUNC
+#error GETXXKEY_R_FUNC is already defined!
+#endif
+
+#ifdef L_getpwnam_r
+#define GETXXKEY_R_FUNC getpwnam_r
+#define GETXXKEY_R_PARSER __parsepwent
+#define GETXXKEY_R_ENTTYPE struct passwd
+#define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->pw_name, key))
+#define DO_GETXXKEY_R_KEYTYPE const char *__restrict
+#define DO_GETXXKEY_R_PATHNAME _PATH_PASSWD
+#endif
+
+#ifdef L_getgrnam_r
+#define GETXXKEY_R_FUNC getgrnam_r
+#define GETXXKEY_R_PARSER __parsegrent
+#define GETXXKEY_R_ENTTYPE struct group
+#define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->gr_name, key))
+#define DO_GETXXKEY_R_KEYTYPE const char *__restrict
+#define DO_GETXXKEY_R_PATHNAME _PATH_GROUP
+#endif
+
+#ifdef L_getspnam_r
+#define GETXXKEY_R_FUNC getspnam_r
+#define GETXXKEY_R_PARSER __parsespent
+#define GETXXKEY_R_ENTTYPE struct spwd
+#define GETXXKEY_R_TEST(ENT) (!strcmp((ENT)->sp_namp, key))
+#define DO_GETXXKEY_R_KEYTYPE const char *__restrict
+#define DO_GETXXKEY_R_PATHNAME _PATH_SHADOW
+#endif
+
+#ifdef L_getpwuid_r
+#define GETXXKEY_R_FUNC getpwuid_r
+#define GETXXKEY_R_PARSER __parsepwent
+#define GETXXKEY_R_ENTTYPE struct passwd
+#define GETXXKEY_R_TEST(ENT) ((ENT)->pw_uid == key)
+#define DO_GETXXKEY_R_KEYTYPE uid_t
+#define DO_GETXXKEY_R_PATHNAME _PATH_PASSWD
+#endif
+
+#ifdef L_getgrgid_r
+#define GETXXKEY_R_FUNC getgrgid_r
+#define GETXXKEY_R_PARSER __parsegrent
+#define GETXXKEY_R_ENTTYPE struct group
+#define GETXXKEY_R_TEST(ENT) ((ENT)->gr_gid == key)
+#define DO_GETXXKEY_R_KEYTYPE gid_t
+#define DO_GETXXKEY_R_PATHNAME _PATH_GROUP
+#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 {
+ 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
+/**********************************************************************/
+#ifdef L_getpwuid
+
+struct passwd *getpwuid(uid_t uid)
+{
+ static char buffer[PWD_BUFFER_SIZE];
+ static struct passwd resultbuf;
+ struct passwd *result;
+
+ getpwuid_r(uid, &resultbuf, buffer, sizeof(buffer), &result);
+ return result;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_getgrgid
+
+struct group *getgrgid(gid_t gid)
+{
+ static char buffer[GRP_BUFFER_SIZE];
+ static struct group resultbuf;
+ struct group *result;
+
+ getgrgid_r(gid, &resultbuf, buffer, sizeof(buffer), &result);
+ return result;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_getspuid_r
+
+/* This function is non-standard and is currently not built. It seems
+ * to have been created as a reentrant version of the non-standard
+ * functions getspuid. Why getspuid was added, I do not know. */
+
+int getspuid_r(uid_t uid, struct spwd *__restrict resultbuf,
+ char *__restrict buffer, size_t buflen,
+ struct spwd **__restrict result)
+{
+ int rv;
+ struct passwd *pp;
+ struct passwd password;
+ char pwd_buff[PWD_BUFFER_SIZE];
+
+ *result = NULL;
+ if (!(rv = getpwuid_r(uid, &password, pwd_buff, sizeof(pwd_buff), &pp))) {
+ rv = getspnam_r(password.pw_name, resultbuf, buffer, buflen, result);
+ }
+
+ return rv;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_getspuid
+
+/* This function is non-standard and is currently not built.
+ * Why it was added, I do not know. */
+
+struct spwd *getspuid(uid_t uid)
+{
+ static char buffer[PWD_BUFFER_SIZE];
+ static struct spwd resultbuf;
+ struct spwd *result;
+
+ getspuid_r(uid, &resultbuf, buffer, sizeof(buffer), &result);
+ return result;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_getpwnam
+
+struct passwd *getpwnam(const char *name)
+{
+ static char buffer[PWD_BUFFER_SIZE];
+ static struct passwd resultbuf;
+ struct passwd *result;
+
+ getpwnam_r(name, &resultbuf, buffer, sizeof(buffer), &result);
+ return result;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_getgrnam
+
+struct group *getgrnam(const char *name)
+{
+ static char buffer[GRP_BUFFER_SIZE];
+ static struct group resultbuf;
+ struct group *result;
+
+ getgrnam_r(name, &resultbuf, buffer, sizeof(buffer), &result);
+ return result;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_getspnam
+
+struct spwd *getspnam(const char *name)
+{
+ static char buffer[PWD_BUFFER_SIZE];
+ static struct spwd resultbuf;
+ struct spwd *result;
+
+ getspnam_r(name, &resultbuf, buffer, sizeof(buffer), &result);
+ return result;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_getpw
+
+int getpw(uid_t uid, char *buf)
+{
+ struct passwd resultbuf;
+ struct passwd *result;
+ char buffer[PWD_BUFFER_SIZE];
+
+ if (!buf) {
+ errno=EINVAL;
+ } else if (!getpwuid_r(uid, &resultbuf, buffer, sizeof(buffer), &result)) {
+ if (sprintf(buf, "%s:%s:%lu:%lu:%s:%s:%s\n",
+ resultbuf.pw_name, resultbuf.pw_passwd,
+ (unsigned long)(resultbuf.pw_uid),
+ (unsigned long)(resultbuf.pw_gid),
+ resultbuf.pw_gecos, resultbuf.pw_dir,
+ resultbuf.pw_shell) >= 0
+ ) {
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_getpwent_r
+
+static FILE *pwf /*= NULL*/;
+void setpwent(void)
+{
+ if (pwf) {
+ rewind(pwf);
+ }
+}
+
+void endpwent(void)
+{
+ if (pwf) {
+ fclose(pwf);
+ pwf = NULL;
+ }
+}
+
+
+int getpwent_r(struct passwd *__restrict resultbuf,
+ char *__restrict buffer, size_t buflen,
+ struct passwd **__restrict result)
+{
+ int rv;
+
+ *result = NULL; /* In case of error... */
+
+ if (!pwf) {
+ if (!(pwf = fopen(_PATH_PASSWD, "r"))) {
+ rv = errno;
+ goto ERR;
+ }
+ }
+
+ if (!(rv = __pgsreader(__parsepwent, resultbuf,
+ buffer, buflen, pwf))) {
+ *result = resultbuf;
+ }
+
+ ERR:
+ return rv;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_getgrent_r
+
+static FILE *grf /*= NULL*/;
+void setgrent(void)
+{
+ if (grf) {
+ rewind(grf);
+ }
+}
+
+void endgrent(void)
+{
+ if (grf) {
+ fclose(grf);
+ grf = NULL;
+ }
+}
+
+int getgrent_r(struct group *__restrict resultbuf,
+ char *__restrict buffer, size_t buflen,
+ struct group **__restrict result)
+{
+ int rv;
+
+ *result = NULL; /* In case of error... */
+
+ if (!grf) {
+ if (!(grf = fopen(_PATH_GROUP, "r"))) {
+ rv = errno;
+ goto ERR;
+ }
+ }
+
+ if (!(rv = __pgsreader(__parsegrent, resultbuf,
+ buffer, buflen, grf))) {
+ *result = resultbuf;
+ }
+
+ ERR:
+ return rv;
+}
+
+#endif
+/**********************************************************************/
+#ifdef L_getspent_r
+
+static FILE *spf /*= NULL*/;
+void setspent(void)
+{
+ if (spf) {
+ rewind(spf);
+ }
+}
+
+void endspent(void)
+{
+ if (spf) {
+ fclose(spf);
+ spf = NULL;
+ }
+}
+
+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"))) {
+ 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_unlocked('\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_unlocked('\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_unlocked(line_buff, buflen, f)) {
+ if (feof_unlocked(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
+/**********************************************************************/