From cae6ebb2c9d01846d4f5085590dd5c0893825773 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Tue, 27 Sep 2005 19:40:49 +0000 Subject: [BZ #1078] 2005-09-27 Ulrich Drepper [BZ #1078] * libio/fileops.c (_IO_new_file_xsputn): Determine amount of available space in non-line-buffered buffer correctly. * libio/oldfileops.c (_IO_old_file_xsputn): Likewise. * stdio-common/Makefile (tests): Add tst-fwrite. * stdio-common/tst-fwrite.c: New file. --- stdio-common/tst-fwrite.c | 70 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 stdio-common/tst-fwrite.c (limited to 'stdio-common/tst-fwrite.c') diff --git a/stdio-common/tst-fwrite.c b/stdio-common/tst-fwrite.c new file mode 100644 index 0000000000..2986c8932a --- /dev/null +++ b/stdio-common/tst-fwrite.c @@ -0,0 +1,70 @@ +/* Derived from the test case in + http://sourceware.org/bugzilla/show_bug.cgi?id=1078. */ +#include +#include +#include + +#define OUT_SIZE 10000 + + +static int fd; + +static void prepare (void); +#define PREPARE(argc, argv) prepare () + +static int do_test (void); +#define TEST_FUNCTION do_test () + +#include "../test-skeleton.c" + + +static void +prepare (void) +{ + fd = create_temp_file ("tst-fwrite.", NULL); + if (fd == -1) + { + puts ("cannot create temporary file"); + exit (1); + } +} + + +static int +do_test (void) +{ + FILE* f = fdopen (fd, "w+"); + if (f == NULL) { + puts ("cannot create stream"); + return 1; + } + puts ("Opened temp file"); + + if (fwrite ("a", 1, 1, f) != 1) + { + puts ("1st fwrite failed"); + return 1; + } + puts ("Wrote a byte"); + fflush (f); + + char buffer[10000]; + size_t i = fread (buffer, 1, sizeof (buffer), f); + printf ("Read %zu bytes\n", i); + + for (i = 0; i < OUT_SIZE; i++) + { + if (fwrite ("n", 1, 1, f) != 1) + { + printf ("fwrite in loop round %zu failed\n", i); + return 1; + } + + if ((i + 1) % 1000 == 0) + printf ("wrote %zu bytes ...\n", i + 1); + } + + printf ("Wrote %i bytes [done]\n", OUT_SIZE); + + return 0; +} -- cgit v1.2.3