[OpenMP] Fix the wrong use of `fopen`

[tianshilei1992]

Summary

This patch fixes the wrong use of fopen.

Fix https://github.com/llvm/llvm-project/issues/60934

[tianshilei1992]

openmp/runtime/src/kmp_runtime.cpp

27

This header should not be included. This patch removes it as well.

[jdoerfert]

the open call was broken, this seems sensible.

openmp/runtime/src/kmp_runtime.cpp

 #include "kmp_io.h"
 #include "kmp_itt.h"
 #include "kmp_settings.h"
 #include "kmp_stats.h"
 #include "kmp_str.h"
 #include "kmp_wait_release.h"
 #include "kmp_wrapper_getpid.h"
 #include "kmp_dispatch.h"
-#include <cstdio>
 #if KMP_USE_HIER_SCHED
 #include "kmp_dispatch_hier.h"
 #endif
 
 #if OMPT_SUPPORT
 #include "ompt-specific.h"
 #endif
 #if OMPD_SUPPORT

 #if defined(KMP_USE_SHM)
   bool use_shm = true;
   char *shm_name = __kmp_str_format("/%s", name);
   int fd1 = shm_open(shm_name, O_RDONLY, 0666);
   if (fd1 == -1) {
     // File did not open. Try the temporary file.
     use_shm = false;
     KMP_DEBUG_ASSERT(temp_reg_status_file_name);
-    FILE *tf = fopen(temp_reg_status_file_name, O_RDONLY);
-    if (!tf) {
+    fd1 = open(temp_reg_status_file_name, O_RDONLY);
+    if (fd1 == -1) {
       // give it up now.
       return;
     }
-    fd1 = fileno(tf);
   }
   char *data1 = (char *)mmap(0, SHM_SIZE, PROT_READ, MAP_SHARED, fd1, 0);
   if (data1 != MAP_FAILED) {
     value = __kmp_str_format("%s", data1); // read value from SHM
     munmap(data1, SHM_SIZE);
   }
   close(fd1);
 #else