Support non-blocking pipe I/O in read() on native Windows.

* lib/unistd.in.h: Include <sys/types.h> also for 'read'.
(read): New declaration.
* lib/read.c: New file.
* lib/stdio.in.h (_GL_ATTRIBUTE_FORMAT_SCANF,
_GL_ATTRIBUTE_FORMAT_SCANF_SYSTEM): New macros.
(fgetc, fgets, fread, fscanf, getc, getchar, gets, scanf, vfscanf,
vscanf): New declarations.
* lib/stdio-read.c: New file.
* m4/read.m4: New file.
* m4/unistd_h.m4 (gl_UNISTD_H_DEFAULTS): Initialize GNULIB_READ,
REPLACE_READ.
* m4/stdio_h.m4 (gl_STDIO_H): Set GNULIB_FGETC, GNULIB_FGETS,
GNULIB_FREAD, GNULIB_FSCANF, GNULIB_GETC, GNULIB_GETCHAR, GNULIB_GETS,
GNULIB_SCANF, GNULIB_VFSCANF, GNULIB_VSCANF. In non-blocking I/O is
desired and needs workarounds, set REPLACE_STDIO_READ_FUNCS.
(gl_STDIO_H_DEFAULTS): Initialize GNULIB_FGETC, GNULIB_FGETS,
GNULIB_FREAD, GNULIB_FSCANF, GNULIB_GETC, GNULIB_GETCHAR, GNULIB_GETS,
GNULIB_SCANF, GNULIB_VFSCANF, GNULIB_VSCANF, REPLACE_STDIO_READ_FUNCS.
* modules/read: New file.
* modules/nonblocking (Files): Add lib/stdio-read.c.
* modules/unistd (Makefile.am): Substitute GNULIB_READ, REPLACE_READ.
* modules/stdio (Makefile.am): Substitute GNULIB_FGETC, GNULIB_FGETS,
GNULIB_FREAD, GNULIB_FSCANF, GNULIB_GETC, GNULIB_GETCHAR, GNULIB_GETS,
GNULIB_SCANF, GNULIB_VFSCANF, GNULIB_VSCANF, REPLACE_STDIO_READ_FUNCS.
* modules/pread (Depends-on): Add read.
* modules/safe-read (Depends-on): Likewise.
* tests/test-stdio-c++.cc (fgetc, fgets, fread, fscanf, getc, getchar,
gets, scanf, vfscanf, vscanf): Verify signatures.
* doc/posix-functions/read.texi: Mention 'nonblocking' module and
problem with non-blocking pipes.
* doc/posix-functions/fgetc.texi: Likewise.
* doc/posix-functions/fgets.texi: Likewise.
* doc/posix-functions/fread.texi: Likewise.
* doc/posix-functions/fscanf.texi: Likewise.
* doc/posix-functions/getc.texi: Likewise.
* doc/posix-functions/getchar.texi: Likewise.
* doc/posix-functions/gets.texi: Likewise.
* doc/posix-functions/scanf.texi: Likewise.
* doc/posix-functions/vfscanf.texi: Likewise.
* doc/posix-functions/vscanf.texi: Likewise.

1 files changed, 42 insertions, 0 deletions

diff --git a/tests/test-stdio-c++.cc b/tests/test-stdio-c++.cc
index a9d00a39f8..07faf0fa02 100644
--- a/tests/test-stdio-c++.cc
+++ b/tests/test-stdio-c++.cc
@@ -36,6 +36,14 @@ SIGNATURE_CHECK (GNULIB_NAMESPACE::fclose, int, (FILE *));
 SIGNATURE_CHECK (GNULIB_NAMESPACE::fflush, int, (FILE *));
 #endif
 
+#if GNULIB_TEST_FGETC
+SIGNATURE_CHECK (GNULIB_NAMESPACE::fgetc, int, (FILE *));
+#endif
+
+#if GNULIB_TEST_FGETS
+SIGNATURE_CHECK (GNULIB_NAMESPACE::fgets, char *, (char *, int, FILE *));
+#endif
+
 #if GNULIB_TEST_FOPEN
 SIGNATURE_CHECK (GNULIB_NAMESPACE::fopen, FILE *,
                  (const char *, const char *));
@@ -57,11 +65,20 @@ SIGNATURE_CHECK (GNULIB_NAMESPACE::fputc, int, (int, FILE *));
 SIGNATURE_CHECK (GNULIB_NAMESPACE::fputs, int, (const char *, FILE *));
 #endif
 
+#if GNULIB_TEST_FREAD
+SIGNATURE_CHECK (GNULIB_NAMESPACE::fread, size_t,
+                 (void *, size_t, size_t, FILE *));
+#endif
+
 #if GNULIB_TEST_FREOPEN
 SIGNATURE_CHECK (GNULIB_NAMESPACE::freopen, FILE *,
                  (const char *, const char *, FILE *));
 #endif
 
+#if GNULIB_TEST_FSCANF
+SIGNATURE_CHECK (GNULIB_NAMESPACE::fscanf, int, (FILE *, const char *, ...));
+#endif
+
 #if GNULIB_TEST_FSEEK
 SIGNATURE_CHECK (GNULIB_NAMESPACE::fseek, int, (FILE *, long, int));
 #endif
@@ -83,6 +100,14 @@ SIGNATURE_CHECK (GNULIB_NAMESPACE::fwrite, size_t,
                  (const void *, size_t, size_t, FILE *));
 #endif
 
+#if GNULIB_TEST_GETC
+SIGNATURE_CHECK (GNULIB_NAMESPACE::getc, int, (FILE *));
+#endif
+
+#if GNULIB_TEST_GETCHAR
+SIGNATURE_CHECK (GNULIB_NAMESPACE::getchar, int, (void));
+#endif
+
 #if GNULIB_TEST_GETDELIM
 SIGNATURE_CHECK (GNULIB_NAMESPACE::getdelim, ssize_t,
                  (char **, size_t *, int, FILE *));
@@ -93,6 +118,10 @@ SIGNATURE_CHECK (GNULIB_NAMESPACE::getline, ssize_t,
                  (char **, size_t *, FILE *));
 #endif
 
+#if GNULIB_TEST_GETS
+SIGNATURE_CHECK (GNULIB_NAMESPACE::gets, char *, (char *));
+#endif
+
 #if GNULIB_TEST_OBSTACK_PRINTF || GNULIB_TEST_OBSTACK_PRINTF_POSIX
 SIGNATURE_CHECK (GNULIB_NAMESPACE::obstack_printf, int,
                  (struct obstack *, const char *, ...));
@@ -140,6 +169,10 @@ SIGNATURE_CHECK (GNULIB_NAMESPACE::renameat, int,
                  (int, char const *, int, char const *));
 #endif
 
+#if GNULIB_TEST_SCANF
+SIGNATURE_CHECK (GNULIB_NAMESPACE::scanf, int, (const char *, ...));
+#endif
+
 #if GNULIB_TEST_SNPRINTF
 SIGNATURE_CHECK (GNULIB_NAMESPACE::snprintf, int,
                  (char *, size_t, const char *, ...));
@@ -170,10 +203,19 @@ SIGNATURE_CHECK (GNULIB_NAMESPACE::vfprintf, int,
                  (FILE *, const char *, va_list));
 #endif
 
+#if GNULIB_TEST_VFSCANF
+SIGNATURE_CHECK (GNULIB_NAMESPACE::vfscanf, int,
+                 (FILE *, const char *, va_list));
+#endif
+
 #if GNULIB_TEST_VPRINTF_POSIX || GNULIB_TEST_VPRINTF
 SIGNATURE_CHECK (GNULIB_NAMESPACE::vprintf, int, (const char *, va_list));
 #endif
 
+#if GNULIB_TEST_VSCANF
+SIGNATURE_CHECK (GNULIB_NAMESPACE::vscanf, int, (const char *, va_list));
+#endif
+
 #if GNULIB_TEST_VSNPRINTF
 SIGNATURE_CHECK (GNULIB_NAMESPACE::vsnprintf, int,
                  (char *, size_t, const char *, va_list));