preadv2/pwritev2: Handle offset == -1 [BZ #22753]

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

4 files changed, 16 insertions, 4 deletions

diff --git a/sysdeps/posix/preadv2.c b/sysdeps/posix/preadv2.c
index d29147608f..4f8557ac83 100644
--- a/sysdeps/posix/preadv2.c
+++ b/sysdeps/posix/preadv2.c
@@ -33,7 +33,10 @@ preadv2 (int fd, const struct iovec *vector, int count, off_t offset,
       return -1;
     }
 
-  return preadv (fd, vector, count, offset);
+  if (offset == -1)
+    return __readv (fd, vector, count);
+  else
+    return preadv (fd, vector, count, offset);
 }
 
 #endif
diff --git a/sysdeps/posix/preadv64v2.c b/sysdeps/posix/preadv64v2.c
index a4844b145c..f89ad08c54 100644
--- a/sysdeps/posix/preadv64v2.c
+++ b/sysdeps/posix/preadv64v2.c
@@ -30,7 +30,10 @@ preadv64v2 (int fd, const struct iovec *vector, int count, off64_t offset,
       return -1;
     }
 
-  return preadv64 (fd, vector, count, offset);
+  if (offset == -1)
+    return __readv (fd, vector, count);
+  else
+    return preadv64 (fd, vector, count, offset);
 }
 
 #ifdef __OFF_T_MATCHES_OFF64_T
diff --git a/sysdeps/posix/pwritev2.c b/sysdeps/posix/pwritev2.c
index 3abf37a810..a39304d9d9 100644
--- a/sysdeps/posix/pwritev2.c
+++ b/sysdeps/posix/pwritev2.c
@@ -33,7 +33,10 @@ pwritev2 (int fd, const struct iovec *vector, int count, off_t offset,
       return -1;
     }
 
-  return pwritev (fd, vector, count, offset);
+  if (offset == -1)
+    return __writev (fd, vector, count);
+  else
+    return pwritev (fd, vector, count, offset);
 }
 
 #endif
diff --git a/sysdeps/posix/pwritev64v2.c b/sysdeps/posix/pwritev64v2.c
index 374d2ad8a9..7a3a3239d7 100644
--- a/sysdeps/posix/pwritev64v2.c
+++ b/sysdeps/posix/pwritev64v2.c
@@ -31,7 +31,10 @@ pwritev64v2 (int fd, const struct iovec *vector, int count, off64_t offset,
       return -1;
     }
 
-  return pwritev64 (fd, vector, count, offset);
+  if (offset == -1)
+    return __writev (fd, vector, count);
+  else
+    return pwritev64 (fd, vector, count, offset);
 }
 
 #ifdef __OFF_T_MATCHES_OFF64_T