X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=klibc_fixups.c;h=99460c32f71240ce08a9c5fad00c9954427206e9;hb=dba8c18b8b7b5f4c6d79593df8179c02a78d020f;hp=c12c90fd1cc7469d87ed419493d015066bf3869a;hpb=2023350eece60db60d30e387cfb644df09b9e8b6;p=elogind.git

diff --git a/klibc_fixups.c b/klibc_fixups.c
index c12c90fd1..99460c32f 100644
--- a/klibc_fixups.c
+++ b/klibc_fixups.c
@@ -1,35 +1,147 @@
+/*
+ * 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 "klibc_fixups.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;
+	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[0] != '\0')
+				id = -1;
+			else
+				dbg("id for '%s' is '%li'", name, id);
+			break;
+		}
+	}
+
+	fclose(file);
+	return id;
+}
 
-char *strerror(int errnum)
+struct passwd *getpwnam(const char *name)
 {
-	return "some error";
+	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;
 }
 
-int strcasecmp(const char *s1, const char *s2)
+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()
 {
-	char *n1;
-	char *n2;
+	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;
-	int i;
-
-	n1 = strdup(s1);
-	n2 = strdup(s2);
-	
-	for (i = 0; i < strlen(n1); ++i)
-		n1[i] = toupper(n1[i]);
-	for (i = 0; i < strlen(n2); ++i)
-		n2[i] = toupper(n2[i]);
-	retval = strcmp(n1, n2);
-	free(n1);
-	free(n2);
-	return 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