1 files changed, 103 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libugly/utent.c b/mdk-stage1/dietlibc/libugly/utent.c
new file mode 100644
index 000000000..d8d5d1ba7
--- /dev/null
+++ b/mdk-stage1/dietlibc/libugly/utent.c
@@ -0,0 +1,103 @@
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <utmp.h>
+
+static const char *utmp_file_name = _PATH_UTMP;
+static int fd = -1;
+
+static int lock_record(int type) {
+  struct flock fl;
+  fl.l_whence	= SEEK_CUR;
+  fl.l_start	= 0;
+  fl.l_len	= sizeof(struct utmp);
+  fl.l_pid	= 0;
+  fl.l_type	= type;
+  return fcntl(fd, F_SETLKW, &fl);
+}
+
+static int unlock_record() {
+  struct flock fl;
+  fl.l_whence	= SEEK_CUR;
+  fl.l_start	= -sizeof(struct utmp);
+  fl.l_len	= sizeof(struct utmp);
+  fl.l_pid	= 0;
+  fl.l_type	= F_UNLCK;
+  return fcntl(fd, F_SETLK, &fl);
+}
+
+void utmpname(const char *file) {
+  if (file)
+    utmp_file_name = file;
+  else
+    utmp_file_name = _PATH_UTMP;
+}
+
+void setutent() {
+  if (fd<0) fd = open(utmp_file_name,O_RDWR);
+  if (fd<0) fd = open(utmp_file_name,O_RDONLY);
+  fcntl (fd, F_SETFD, FD_CLOEXEC);
+  lseek(fd,0,SEEK_SET);
+}
+
+void endutent() {
+  if (fd<0) return;
+  close(fd); fd=-1;
+}
+
+struct utmp *getutent(void) {
+  static struct utmp getutent_tmp;
+  int ret;
+
+  if (fd<0) {
+    setutent();
+    if (fd<0) return 0;
+  }
+  if (lock_record(F_RDLCK)) return 0;
+  ret=read(fd, &getutent_tmp, sizeof(struct utmp));
+  unlock_record();
+  if (ret<1) return 0;
+  return &getutent_tmp;
+}
+
+struct utmp *getutid(struct utmp *ut) {
+  struct utmp *tmp;
+
+  while ((tmp = getutent())) {
+    if (ut->ut_type && (ut->ut_type <= OLD_TIME)) {
+      if (ut->ut_type == tmp->ut_type) break;
+    }
+    if ((ut->ut_type >= INIT_PROCESS) && (ut->ut_type <= DEAD_PROCESS)) {
+      if (!strncmp(ut->ut_id,tmp->ut_id,4)) break;
+    }
+  }
+  return tmp;
+}
+
+struct utmp *getutline(struct utmp *ut) {
+  struct utmp *tmp;
+
+  while ((tmp = getutent())) {
+    if ((tmp->ut_type == USER_PROCESS) || (tmp->ut_type == LOGIN_PROCESS)) {
+      if (!strncmp(ut->ut_line,tmp->ut_line,UT_LINESIZE)) break;
+    }
+  }
+  return tmp;
+}
+
+void pututline(struct utmp *ut) {
+  struct utmp *tmp;
+
+  if ((tmp = getutid(ut))) {
+    lseek(fd, - (off_t)sizeof(struct utmp), SEEK_CUR);
+    if (lock_record(F_WRLCK)) return;
+    write(fd, ut, sizeof(struct utmp));
+  }
+  else {
+    lseek(fd, 0, SEEK_END);
+    if (lock_record(F_WRLCK)) return;
+    write(fd, ut, (off_t)sizeof(struct utmp));
+  }
+  unlock_record();
+}
+