!287 feat(vfs): vfs支持FD_CLOEXEC标记

Merge pull request !287 from MGY917/master

kernel/extended/dynload/src/los_exec_elf.c

@@ -82,7 +82,6 @@ STATIC INT32 OsGetRealPath(const CHAR *fileName, CHAR *buf, UINT32 maxLen)
     return LOS_OK;
 
 ERR_FILE:
-    PRINT_ERR("No such file or directory: %s\n", fileName);
     return -ENOENT;
 }
 #endif

kernel/extended/dynload/src/los_load_elf.c

@@ -33,6 +33,7 @@
 #include "fcntl.h"
 #include "fs/fd_table.h"
 #include "fs/file.h"
+#include "fs/fs_operation.h"
 #include "los_config.h"
 #include "los_vm_map.h"
 #include "los_vm_syscall.h"
@@ -56,6 +57,10 @@ static int OsELFOpen(const CHAR *fileName, INT32 oflags)
         return -EMFILE;
     }
 
+    if (oflags & O_CLOEXEC) {
+        SetCloexecFlag(procFd);
+    }
+
     ret = open(fileName, oflags);
     if (ret < 0) {
         FreeProcessFd(procFd);
@@ -186,7 +191,7 @@ STATIC INT32 OsReadEhdr(const CHAR *fileName, ELFInfo *elfInfo, BOOL isExecFile)
         return -ENOENT;
     }
 
-    ret = OsELFOpen(fileName, O_RDONLY | O_EXECVE);
+    ret = OsELFOpen(fileName, O_RDONLY | O_EXECVE | O_CLOEXEC);
     if (ret < 0) {
         PRINT_ERR("%s[%d], Failed to open ELF file: %s!\n", __FUNCTION__, __LINE__, fileName);
         return ret;