diff options
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | libio/Makefile | 2 | ||||
| -rw-r--r-- | libio/bug-ungetc3.c | 94 |
3 files changed, 103 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog index fb0865688d..0cc3aba929 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,11 @@ +2004-11-04 Jakub Jelinek <jakub@redhat.com> + + * libio/fileops.c (_IO_new_file_seekoff): If mode is 0 and + fp->_offset == _IO_pos_BAD, just call _IO_SYSSEEK (fp, 0, dir) + and if successful set fp->_offset. + * libio/Makefile (tests): Add bug-ungetc3. + * libio/bug-ungetc3.c: New test. + 2004-11-03 Marcus Brinkmann <marcus@gnu.org> * sysdeps/gnu/_G_config.h (_G_HAVE_MREMAP): Define symbol. diff --git a/libio/Makefile b/libio/Makefile index a9384b55a9..1d7611d252 100644 --- a/libio/Makefile +++ b/libio/Makefile @@ -54,7 +54,7 @@ tests = tst_swprintf tst_wprintf tst_swscanf tst_wscanf tst_getwc tst_putwc \ tst-freopen bug-rewind bug-rewind2 bug-ungetc bug-fseek \ tst-mmap-eofsync tst-mmap-fflushsync bug-mmap-fflush \ tst-mmap2-eofsync tst-mmap-offend bug-fopena+ bug-wfflush \ - bug-ungetc2 bug-ftell + bug-ungetc2 bug-ftell bug-ungetc3 test-srcs = test-freopen all: # Make this the default target; it will be defined in Rules. diff --git a/libio/bug-ungetc3.c b/libio/bug-ungetc3.c new file mode 100644 index 0000000000..0c83c1161e --- /dev/null +++ b/libio/bug-ungetc3.c @@ -0,0 +1,94 @@ +/* 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_one_test (int mode) +{ + FILE *f; + + f = fopen (temp_file, "r"); + if (f == NULL) + { + printf ("could not open temporary file: %m\n"); + return 1; + } + + if (mode == 1 && ftell (f) != 0) + { + printf ("first ftell returned wrong position %ld\n", ftell (f)); + return 1; + } + + if (fgetc (f) != '1' || fgetc (f) != '2') + { + puts ("fgetc failed"); + return 1; + } + + if (mode == 2 && ftell (f) != 2) + { + printf ("second ftell returned wrong position %ld\n", ftell (f)); + return 1; + } + + if (ungetc ('6', f) != '6') + { + puts ("ungetc failed"); + return 1; + } + + if (ftell (f) != 1) + { + printf ("third ftell returned wrong position %ld\n", ftell (f)); + return 1; + } + + if (fgetc (f) != '6') + { + puts ("fgetc failed"); + return 1; + } + + if (ftell (f) != 2) + { + printf ("fourth ftell returned wrong position %ld\n", ftell (f)); + return 1; + } + + fclose (f); + + return 0; +} + +static int +do_test (void) +{ + int mode; + for (mode = 0; mode <= 2; mode++) + if (do_one_test (mode)) + return 1; + return 0; +} |