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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /REORG.TODO/libio/bug-ungetc.c | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.tar glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.tar.gz glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.tar.bz2 glibc-5046dbb4a7eba5eccfd258f92f4735c9ffc8d069.zip |
Prepare for radical source tree reorganization.zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).
Diffstat (limited to 'REORG.TODO/libio/bug-ungetc.c')
-rw-r--r-- | REORG.TODO/libio/bug-ungetc.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/REORG.TODO/libio/bug-ungetc.c b/REORG.TODO/libio/bug-ungetc.c new file mode 100644 index 0000000000..51940b68f5 --- /dev/null +++ b/REORG.TODO/libio/bug-ungetc.c @@ -0,0 +1,61 @@ +/* Test program for ungetc/ftell interaction bug. */ + +#include <stdio.h> + +static void do_prepare (void); +#define PREPARE(argc, argv) do_prepare () +static int do_test (void); +#define TEST_FUNCTION do_test () +#include <test-skeleton.c> + +static const char pattern[] = "12345"; +static char *temp_file; + +static void +do_prepare (void) +{ + int fd = create_temp_file ("bug-ungetc.", &temp_file); + if (fd == -1) + { + printf ("cannot create temporary file: %m\n"); + exit (1); + } + write (fd, pattern, sizeof (pattern)); + close (fd); +} + +static int +do_test (void) +{ + int i; + FILE *f; + char buf[10]; + long offset, diff; + int result = 0; + + f = fopen (temp_file, "rw"); + + rewind (f); + for (i = 0; i < 3; i++) + printf ("%c\n", getc (f)); + offset = ftell (f); + printf ("offset = %ld\n", offset); + if (ungetc ('4', f) != '4') + { + printf ("ungetc failed\n"); + abort (); + } + printf ("offset after ungetc = %ld\n", ftell (f)); + + i = fread ((void *) buf, 4, (size_t) 1, f); + printf ("read %d (%c), offset = %ld\n", i, buf[0], ftell (f)); + diff = ftell (f) - offset; + if (diff != 3) + { + printf ("ftell did not update properly. got %ld, expected 3\n", diff); + result = 1; + } + fclose (f); + + return result; +} |