src/solaris/native/sun/nio/fs/LinuxNativeDispatcher.c

*** 1,7 ****
  /*
!  * Copyright (c) 2008, 2012, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
--- 1,7 ----
  /*
!  * Copyright (c) 2008, 2019, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
*** 167,192 ****
      }
      return ptr_to_jlong(fp);
  }
  
  JNIEXPORT jint JNICALL
! Java_sun_nio_fs_LinuxNativeDispatcher_getmntent(JNIEnv* env, jclass this,
!     jlong value, jobject entry)
  {
      struct mntent ent;
!     char buf[1024];
!     int buflen = sizeof(buf);
      struct mntent* m;
      FILE* fp = jlong_to_ptr(value);
      jsize len;
      jbyteArray bytes;
      char* name;
      char* dir;
      char* fstype;
      char* options;
  
!     m = getmntent_r(fp, &ent, (char*)&buf, buflen);
      if (m == NULL)
          return -1;
      name = m->mnt_fsname;
      dir = m->mnt_dir;
      fstype = m->mnt_type;
--- 167,191 ----
      }
      return ptr_to_jlong(fp);
  }
  
  JNIEXPORT jint JNICALL
! Java_sun_nio_fs_LinuxNativeDispatcher_getmntent0(JNIEnv* env, jclass this,
!     jlong value, jobject entry, jlong buffer, jint bufLen)
  {
      struct mntent ent;
!     char * buf = (char*)jlong_to_ptr(buffer);
      struct mntent* m;
      FILE* fp = jlong_to_ptr(value);
      jsize len;
      jbyteArray bytes;
      char* name;
      char* dir;
      char* fstype;
      char* options;
  
!     m = getmntent_r(fp, &ent, buf, (int)bufLen);
      if (m == NULL)
          return -1;
      name = m->mnt_fsname;
      dir = m->mnt_dir;
      fstype = m->mnt_type;
*** 228,232 ****
--- 227,263 ----
  {
      FILE* fp = jlong_to_ptr(stream);
      /* FIXME - man page doesn't explain how errors are returned */
      endmntent(fp);
  }
+ 
+ /**
+  * This function returns line length without NUL terminator or -1 on EOF.
+  */
+ JNIEXPORT jint JNICALL
+ Java_sun_nio_fs_LinuxNativeDispatcher_getlinelen(JNIEnv* env, jclass this, jlong stream)
+ {
+     FILE* fp = jlong_to_ptr(stream);
+     size_t lineSize = 0;
+     char * lineBuffer = NULL;
+     int saved_errno;
+ 
+     ssize_t res = getline(&lineBuffer, &lineSize, fp);
+     saved_errno = errno;
+ 
+     /* Should free lineBuffer no matter result, according to man page */
+     if (lineBuffer != NULL)
+         free(lineBuffer);
+ 
+     if (feof(fp))
+         return -1;
+ 
+     /* On successfull return res >= 0, otherwise res is -1 */
+     if (res == -1)
+         throwUnixException(env, saved_errno);
+ 
+     if (res > INT_MAX)
+         throwUnixException(env, EOVERFLOW);
+ 
+     return (jint)res;
+ }
+