aboutsummaryrefslogtreecommitdiff
path: root/REORG.TODO/libio/iofgets.c
diff options
context:
space:
mode:
Diffstat (limited to 'REORG.TODO/libio/iofgets.c')
-rw-r--r--REORG.TODO/libio/iofgets.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/REORG.TODO/libio/iofgets.c b/REORG.TODO/libio/iofgets.c
new file mode 100644
index 0000000000..8643e7c6cc
--- /dev/null
+++ b/REORG.TODO/libio/iofgets.c
@@ -0,0 +1,78 @@
+/* Copyright (C) 1993-2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>.
+
+ As a special exception, if you link the code in this file with
+ files compiled with a GNU compiler to produce an executable,
+ that does not cause the resulting executable to be covered by
+ the GNU Lesser General Public License. This exception does not
+ however invalidate any other reasons why the executable file
+ might be covered by the GNU Lesser General Public License.
+ This exception applies to code released by its copyright holders
+ in files containing the exception. */
+
+#include "libioP.h"
+#include <stdio.h>
+
+char *
+_IO_fgets (char *buf, int n, _IO_FILE *fp)
+{
+ _IO_size_t count;
+ char *result;
+ int old_error;
+ CHECK_FILE (fp, NULL);
+ if (n <= 0)
+ return NULL;
+ if (__glibc_unlikely (n == 1))
+ {
+ /* Another irregular case: since we have to store a NUL byte and
+ there is only room for exactly one byte, we don't have to
+ read anything. */
+ buf[0] = '\0';
+ return buf;
+ }
+ _IO_acquire_lock (fp);
+ /* This is very tricky since a file descriptor may be in the
+ non-blocking mode. The error flag doesn't mean much in this
+ case. We return an error only when there is a new error. */
+ old_error = fp->_IO_file_flags & _IO_ERR_SEEN;
+ fp->_IO_file_flags &= ~_IO_ERR_SEEN;
+ count = _IO_getline (fp, buf, n - 1, '\n', 1);
+ /* If we read in some bytes and errno is EAGAIN, that error will
+ be reported for next read. */
+ if (count == 0 || ((fp->_IO_file_flags & _IO_ERR_SEEN)
+ && errno != EAGAIN))
+ result = NULL;
+ else
+ {
+ buf[count] = '\0';
+ result = buf;
+ }
+ fp->_IO_file_flags |= old_error;
+ _IO_release_lock (fp);
+ return result;
+}
+
+#ifdef weak_alias
+weak_alias (_IO_fgets, fgets)
+
+# ifndef _IO_MTSAFE_IO
+strong_alias (_IO_fgets, __fgets_unlocked)
+libc_hidden_def (__fgets_unlocked)
+weak_alias (_IO_fgets, fgets_unlocked)
+libc_hidden_weak (fgets_unlocked)
+# endif
+#endif