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-rw-r--r--libc/pwd_grp/Makefile5
-rw-r--r--libc/pwd_grp/__getpwent_r.c112
-rw-r--r--libc/pwd_grp/fgetpwent.c20
-rw-r--r--libc/pwd_grp/getpwnam.c32
-rw-r--r--libc/pwd_grp/getpwuid.c30
-rw-r--r--libc/pwd_grp/pwent.c21
6 files changed, 197 insertions, 23 deletions
diff --git a/libc/pwd_grp/Makefile b/libc/pwd_grp/Makefile
index bdd3c9782..d37efbdf3 100644
--- a/libc/pwd_grp/Makefile
+++ b/libc/pwd_grp/Makefile
@@ -24,8 +24,9 @@ TOPDIR=../
include $(TOPDIR)Rules.mak
LIBC=$(TOPDIR)libc.a
-CSRC=__getpwent.c pwent.c getpwnam.c getpwuid.c putpwent.c getpw.c fgetpwent.c \
- __getgrent.c grent.c getgrnam.c getgrgid.c fgetgrent.c initgroups.c
+CSRC= pwent.c getpwnam.c getpwuid.c putpwent.c getpw.c fgetpwent.c \
+ __getgrent.c grent.c getgrnam.c getgrgid.c fgetgrent.c \
+ initgroups.c __getpwent_r.c
COBJS=$(patsubst %.c,%.o, $(CSRC))
OBJS=$(COBJS)
diff --git a/libc/pwd_grp/__getpwent_r.c b/libc/pwd_grp/__getpwent_r.c
new file mode 100644
index 000000000..aa2b990a4
--- /dev/null
+++ b/libc/pwd_grp/__getpwent_r.c
@@ -0,0 +1,112 @@
+/*
+ * __getpwent_r.c - This file is part of the libc-8086/pwd package for ELKS,
+ * Copyright (C) 1995, 1996 Nat Friedman <ndf@linux.mit.edu>.
+ * Copyright (C) 2001 Erik Andersen <andersee@debian.org>
+ *
+ * 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.
+ *
+ * March 7, 2001 -- Reworked to be reentrant by Erik Andersen
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <fcntl.h>
+#include <pwd.h>
+
+
+/* This isn't as flash as my previous version -- it doesn't dynamically
+ scale down the gecos on too-long lines, but it also makes fewer syscalls,
+ so it's probably nicer. Write me if you want the old version. Maybe I
+ should include it as a build-time option... ?
+ -Nat <ndf@linux.mit.edu> */
+
+int __getpwent_r(struct passwd * passwd, char * line_buff, size_t buflen, int pwd_fd)
+{
+ char *field_begin;
+ char *endptr;
+ char *gid_ptr=NULL;
+ char *uid_ptr=NULL;
+ int line_len;
+ int i;
+
+ /* We use the restart label to handle malformatted lines */
+ restart:
+ /* Read the passwd line into the static buffer using a minimal of
+ syscalls. */
+ if ((line_len = read(pwd_fd, line_buff, buflen)) <= 0)
+ return -1;
+ field_begin = strchr(line_buff, '\n');
+ if (field_begin != NULL)
+ lseek(pwd_fd, (long) (1 + field_begin - (line_buff + line_len)),
+ SEEK_CUR);
+ else { /* The line is too long - skip it. :-\ */
+
+ do {
+ if ((line_len = read(pwd_fd, line_buff, buflen)) <= 0)
+ return -1;
+ } while (!(field_begin = strchr(line_buff, '\n')));
+ lseek(pwd_fd, (long) (field_begin - line_buff) - line_len + 1,
+ SEEK_CUR);
+ goto restart;
+ }
+ if (*line_buff == '#' || *line_buff == ' ' || *line_buff == '\n' ||
+ *line_buff == '\t')
+ goto restart;
+ *field_begin = '\0';
+
+ /* We've read the line; now parse it. */
+ field_begin = line_buff;
+ for (i = 0; i < 7; i++) {
+ switch (i) {
+ case 0:
+ passwd->pw_name = field_begin;
+ break;
+ case 1:
+ passwd->pw_passwd = field_begin;
+ break;
+ case 2:
+ uid_ptr = field_begin;
+ break;
+ case 3:
+ gid_ptr = field_begin;
+ break;
+ case 4:
+ passwd->pw_gecos = field_begin;
+ break;
+ case 5:
+ passwd->pw_dir = field_begin;
+ break;
+ case 6:
+ passwd->pw_shell = field_begin;
+ break;
+ }
+ if (i < 6) {
+ field_begin = strchr(field_begin, ':');
+ if (field_begin == NULL)
+ goto restart;
+ *field_begin++ = '\0';
+ }
+ }
+ passwd->pw_gid = (gid_t) strtoul(gid_ptr, &endptr, 10);
+ if (*endptr != '\0')
+ goto restart;
+
+ passwd->pw_uid = (uid_t) strtoul(uid_ptr, &endptr, 10);
+ if (*endptr != '\0')
+ goto restart;
+
+ return 0;
+}
diff --git a/libc/pwd_grp/fgetpwent.c b/libc/pwd_grp/fgetpwent.c
index cd8742d80..74c59427c 100644
--- a/libc/pwd_grp/fgetpwent.c
+++ b/libc/pwd_grp/fgetpwent.c
@@ -22,12 +22,26 @@
#include <stdio.h>
#include <pwd.h>
-struct passwd *fgetpwent(FILE * file)
+#define PWD_BUFFER_SIZE 256
+
+/* file descriptor for the password file currently open */
+static char line_buff[PWD_BUFFER_SIZE];
+static struct passwd pwd;
+
+int fgetpwent_r (FILE *file, struct passwd *password,
+ char *buff, size_t buflen, struct passwd **crap)
{
if (file == NULL) {
errno = EINTR;
- return NULL;
+ return -1;
}
+ return(__getpwent_r(password, buff, buflen, fileno(file)));
+}
- return __getpwent(fileno(file));
+struct passwd *fgetpwent(FILE * file)
+{
+ if (fgetpwent_r(file, &pwd, line_buff, PWD_BUFFER_SIZE, NULL) != -1) {
+ return &pwd;
+ }
+ return NULL;
}
diff --git a/libc/pwd_grp/getpwnam.c b/libc/pwd_grp/getpwnam.c
index 63671927b..399e24ddc 100644
--- a/libc/pwd_grp/getpwnam.c
+++ b/libc/pwd_grp/getpwnam.c
@@ -25,25 +25,41 @@
#include <pwd.h>
-struct passwd *getpwnam(const char *name)
+#define PWD_BUFFER_SIZE 256
+
+/* file descriptor for the password file currently open */
+static char line_buff[PWD_BUFFER_SIZE];
+static struct passwd pwd;
+
+
+int getpwnam_r (const char *name, struct passwd *password,
+ char *buff, size_t buflen, struct passwd **crap)
{
int passwd_fd;
- struct passwd *passwd;
if (name == NULL) {
errno = EINVAL;
- return NULL;
+ return -1;
}
if ((passwd_fd = open("/etc/passwd", O_RDONLY)) < 0)
- return NULL;
+ return -1;
- while ((passwd = __getpwent(passwd_fd)) != NULL)
- if (!strcmp(passwd->pw_name, name)) {
+ while (__getpwent_r(password, buff, buflen, passwd_fd) != -1)
+ if (!strcmp(password->pw_name, name)) {
close(passwd_fd);
- return passwd;
+ return 0;
}
close(passwd_fd);
- return NULL;
+ return -1;
}
+
+struct passwd *getpwnam(const char *name)
+{
+ if (getpwnam_r(name, &pwd, line_buff, PWD_BUFFER_SIZE, NULL) != -1) {
+ return &pwd;
+ }
+ return NULL;
+}
+
diff --git a/libc/pwd_grp/getpwuid.c b/libc/pwd_grp/getpwuid.c
index 1cd0d691c..307f840e1 100644
--- a/libc/pwd_grp/getpwuid.c
+++ b/libc/pwd_grp/getpwuid.c
@@ -23,20 +23,36 @@
#include <fcntl.h>
#include <pwd.h>
-struct passwd *getpwuid(uid_t uid)
+
+#define PWD_BUFFER_SIZE 256
+
+/* file descriptor for the password file currently open */
+static char line_buff[PWD_BUFFER_SIZE];
+static struct passwd pwd;
+
+int getpwuid_r (uid_t uid, struct passwd *password,
+ char *buff, size_t buflen, struct passwd **crap)
{
int passwd_fd;
- struct passwd *passwd;
if ((passwd_fd = open("/etc/passwd", O_RDONLY)) < 0)
- return NULL;
+ return -1;
- while ((passwd = __getpwent(passwd_fd)) != NULL)
- if (passwd->pw_uid == uid) {
+ while (__getpwent_r(password, buff, buflen, passwd_fd) != -1)
+ if (password->pw_uid == uid) {
close(passwd_fd);
- return passwd;
+ return 0;
}
close(passwd_fd);
- return NULL;
+ return -1;
}
+
+struct passwd *getpwuid(uid_t uid)
+{
+ if (getpwuid_r(uid, &pwd, line_buff, PWD_BUFFER_SIZE, NULL) != -1) {
+ return &pwd;
+ }
+ return NULL;
+}
+
diff --git a/libc/pwd_grp/pwent.c b/libc/pwd_grp/pwent.c
index 475c8e560..6f81f1ea6 100644
--- a/libc/pwd_grp/pwent.c
+++ b/libc/pwd_grp/pwent.c
@@ -30,8 +30,12 @@
* link them all in together.
*/
+#define PWD_BUFFER_SIZE 256
+
/* file descriptor for the password file currently open */
static int pw_fd = -1;
+static char line_buff[PWD_BUFFER_SIZE];
+static struct passwd pwd;
void setpwent(void)
{
@@ -48,9 +52,20 @@ void endpwent(void)
pw_fd = -1;
}
+int getpwent_r (struct passwd *password, char *buff,
+ size_t buflen, struct passwd **crap)
+{
+ if (pw_fd != -1 && __getpwent_r(password, buff, buflen, pw_fd) != -1) {
+ return 0;
+ }
+ return -1;
+}
+
struct passwd *getpwent(void)
{
- if (pw_fd != -1)
- return (__getpwent(pw_fd));
- return NULL;
+ if (getpwent_r(&pwd, line_buff, PWD_BUFFER_SIZE, NULL) != -1) {
+ return &pwd;
+ }
+ return NULL;
}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 21:20:42 +0000