X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=klibc_fixups.c;h=bbacfbdc75cf02ada93fa6cf9aed42c6a1667284;hp=a99166811c82d1cb5e9c5a79575ba26f8bd20162;hb=eb6c7cd03635ffc28798734f0b87b9e21dae6f9e;hpb=fee6f4150d0d5fbfc1ba74130bac1ae21ce69c81

diff --git a/klibc_fixups.c b/klibc_fixups.c
index a99166811..bbacfbdc7 100644
--- a/klibc_fixups.c
+++ b/klibc_fixups.c
@@ -1,10 +1,161 @@
+/*
+ * 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 <fcntl.h>
 #include <sys/types.h>
+
+#include "udev.h"
 #include "klibc_fixups.h"
+#include "udev_lib.h"
+#include "logging.h"
+
+#define PW_FILE		"/etc/passwd"
+#define GR_FILE		"/etc/group"
+#define UTMP_FILE	"/var/run/utmp"
+
+/* 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;
+	char line[255];
+	char *buf;
+	size_t bufsize;
+	size_t cur;
+	size_t count;
+	char *pos;
+	char *name;
+	char *idstr;
+	char *tail;
+
+	if (file_map(dbfile, &buf, &bufsize) == 0) {
+		dbg("reading '%s' as db file", dbfile);
+	} else {
+		dbg("can't open '%s' as db file", dbfile);
+		return -1;
+	}
+
+	/* loop through the whole file */
+
+	cur = 0;
+	while (1) {
+		count = buf_get_line(buf, bufsize, cur);
+
+		strncpy(line, buf + cur, count);
+		line[count] = '\0';
+		pos = line;
+
+		cur += count+1;
+		if (cur > bufsize)
+			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[0] != '\0')
+				id = -1;
+			else
+				dbg("id for '%s' is '%li'", name, id);
+			break;
+		}
+	}
+
+	file_unmap(buf, bufsize);
+	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;
+}
+
+
+int ufd = -1;
+
+void setutent()
+{
+	if (ufd < 0)
+		ufd = open(UTMP_FILE, O_RDONLY);
+	fcntl(ufd, F_SETFD, FD_CLOEXEC);
+	lseek(ufd, 0, SEEK_SET);
+}
+
+void endutent() {
+	if (ufd < 0)
+		return;
+	close(ufd);
+	ufd = -1;
+}
+
+struct utmp *getutent(void)
+{
+	static struct utmp utmp;
+	int retval;
+
+	if (ufd < 0) {
+		setutent();
+		if (ufd < 0)
+			return NULL;
+	}
+	retval = read(ufd, &utmp, sizeof(struct utmp));
+	if (retval < 1)
+		return NULL;
+	return &utmp;
+}
 
 #endif