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authorkay.sievers@vrfy.org <kay.sievers@vrfy.org>2004-02-23 19:29:32 -0800
committerGreg KH <gregkh@suse.de>2005-04-26 21:32:30 -0700
commit82962619c626edfc68d39f0b179a909dd3dd0a6b (patch)
tree2d6ec012fa334f8c14da381576d37aec02141bc9
parentc80da5085f915bf6305e7ed6b786b63f6e9b14ea (diff)
[PATCH] udev - simple klibc textual uid/gid handling
Here we get a very dumb getpwnam() and getgrnam() for klibc to stop the confusion of not handling textual id's if klibc is used. If used with initrd we just need to copy the /etc/passwd and /etc/group file and all should work well.
-rw-r--r--klibc_fixups.c100
-rw-r--r--klibc_fixups.h25
2 files changed, 108 insertions, 17 deletions
diff --git a/klibc_fixups.c b/klibc_fixups.c
index a99166811c..927f2f649a 100644
--- a/klibc_fixups.c
+++ b/klibc_fixups.c
@@ -1,10 +1,110 @@
+/*
+ * klibc_fixups.c - very simple implementation of stuff missing in klibc
+ *
+ * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (C) 2004 Kay Sievers <kay@vrfy.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation version 2 of the License.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
#ifdef __KLIBC__
#include <stdlib.h>
+#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <sys/types.h>
+
#include "klibc_fixups.h"
+#include "logging.h"
+
+#define PW_FILE "/etc/passwd"
+#define GR_FILE "/etc/group"
+
+/* return the id of a passwd style line, selected by the users name */
+static unsigned long get_id_by_name(const char *uname, const char *dbfile)
+{
+ unsigned long id = -1;
+ FILE *file;
+ char buf[255];
+ char *pos;
+ char *name;
+ char *idstr;
+ char *tail;
+
+ file = fopen(dbfile, "r");
+ if (file == NULL) {
+ dbg("unable to open file '%s'", dbfile);
+ return -1;
+ }
+
+ while (1) {
+ pos = fgets(buf, sizeof(buf), file);
+ if (pos == NULL)
+ break;
+
+ /* get name */
+ name = strsep(&pos, ":");
+ if (name == NULL)
+ continue;
+
+ /* skip pass */
+ if (strsep(&pos, ":") == NULL)
+ continue;
+
+ /* get id */
+ idstr = strsep(&pos, ":");
+ if (idstr == NULL)
+ continue;
+
+ if (strcmp(uname, name) == 0) {
+ id = strtoul(idstr, &tail, 10);
+ if (tail == NULL)
+ id = -1;
+ else
+ dbg("id for '%s' is '%li'", name, id);
+ break;
+ }
+ }
+
+ fclose(file);
+ return id;
+}
+
+struct passwd *getpwnam(const char *name)
+{
+ static struct passwd pw;
+
+ memset(&pw, 0x00, sizeof(struct passwd));
+ pw.pw_uid = (uid_t) get_id_by_name(name, PW_FILE);
+ if (pw.pw_uid < 0)
+ return NULL;
+ else
+ return &pw;
+}
+
+struct group *getgrnam(const char *name)
+{
+ static struct group gr;
+
+ memset(&gr, 0x00, sizeof(struct group));
+ gr.gr_gid = (gid_t) get_id_by_name(name, GR_FILE);
+ if (gr.gr_gid < 0)
+ return NULL;
+ else
+ return &gr;
+}
#endif
diff --git a/klibc_fixups.h b/klibc_fixups.h
index 1ac112b087..19bfd51caa 100644
--- a/klibc_fixups.h
+++ b/klibc_fixups.h
@@ -3,19 +3,6 @@
#ifndef KLIBC_FIXUPS_H
#define KLIBC_FIXUPS_H
-struct group {
- char *gr_name; /* group name */
- char *gr_passwd; /* group password */
- gid_t gr_gid; /* group id */
- char **gr_mem; /* group members */
-};
-
-static inline struct group *getgrnam(const char *name)
-{
- return NULL;
-}
-
-
struct passwd {
char *pw_name; /* user name */
char *pw_passwd; /* user password */
@@ -26,11 +13,15 @@ struct passwd {
char *pw_shell; /* shell program */
};
-static inline struct passwd *getpwnam(const char *name)
-{
- return NULL;
-}
+struct group {
+ char *gr_name; /* group name */
+ char *gr_passwd; /* group password */
+ gid_t gr_gid; /* group id */
+ char **gr_mem; /* group members */
+};
+struct passwd *getpwnam(const char *name);
+struct group *getgrnam(const char *name);
#endif