[PATCH] add $local user spport for permissions

[elogind.git] / klibc_fixups.c

diff --git a/klibc_fixups.c b/klibc_fixups.c
index 927f2f649a671762c1943ef68189f768b73a8054..1241eb7d108061c98fc2af0c114f807dfe757983 100644 (file)
--- a/klibc_fixups.c
+++ b/klibc_fixups.c
@@ -25,6 +25,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <ctype.h>
+#include <fcntl.h>
 #include <sys/types.h>
 
 #include "klibc_fixups.h"
@@ -32,6 +33,8 @@
 
 #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)
@@ -107,4 +110,38 @@ struct group *getgrnam(const char *name)
                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