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Update.
2002-02-25 Jakub Jelinek <jakub@redhat.com> * libio/iofopen.c (__fopen_maybe_mmap): Set the initial position to fp->_offset if it is set. * stdio-common/Makefile (tests): Add tst-fdopen. * stdio-common/tst-fdopen.c: New test. 2002-02-25 Jakub Jelinek <jakub@redhat.com> * libio/fileops.c (_IO_file_xsgetn_mmap): Handle reading from backup. * stdio-common/tst-ungetc.c (main): Add another test.
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ChangeLog
12
ChangeLog
@ -1,3 +1,15 @@
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2002-02-25 Jakub Jelinek <jakub@redhat.com>
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* libio/iofopen.c (__fopen_maybe_mmap): Set the initial
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position to fp->_offset if it is set.
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* stdio-common/Makefile (tests): Add tst-fdopen.
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* stdio-common/tst-fdopen.c: New test.
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2002-02-25 Jakub Jelinek <jakub@redhat.com>
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* libio/fileops.c (_IO_file_xsgetn_mmap): Handle reading from backup.
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* stdio-common/tst-ungetc.c (main): Add another test.
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2002-02-25 Ulrich Drepper <drepper@redhat.com>
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* assert/assert-perr.c: Use INTUSE to reference functions and variables
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@ -1197,28 +1197,54 @@ _IO_file_xsgetn_mmap (fp, data, n)
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{
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register _IO_size_t have;
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char *read_ptr = fp->_IO_read_ptr;
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register char *s = (char *) data;
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have = fp->_IO_read_end - fp->_IO_read_ptr;
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if (have < n)
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{
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/* Maybe the read buffer is not yet fully set up. */
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fp->_IO_read_ptr = fp->_IO_read_end;
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if (fp->_IO_read_end < fp->_IO_buf_end
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&& _IO_file_underflow_mmap (fp) != EOF)
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have = fp->_IO_read_end - read_ptr;
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if (__builtin_expect (_IO_in_backup (fp), 0))
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{
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#ifdef _LIBC
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s = __mempcpy (s, read_ptr, have);
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#else
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memcpy (s, read_ptr, have);
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s += have;
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#endif
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n -= have;
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_IO_switch_to_main_get_area (fp);
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read_ptr = fp->_IO_read_ptr;
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have = fp->_IO_read_end - fp->_IO_read_ptr;
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}
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if (have < n)
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{
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/* Maybe the read buffer is not yet fully set up. */
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fp->_IO_read_ptr = fp->_IO_read_end;
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if (fp->_IO_read_end < fp->_IO_buf_end
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&& _IO_file_underflow_mmap (fp) != EOF)
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have = fp->_IO_read_end - read_ptr;
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}
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}
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if (have == 0)
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fp->_flags |= _IO_EOF_SEEN;
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{
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if (s == (char *) data)
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fp->_flags |= _IO_EOF_SEEN;
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}
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else
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{
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have = MIN (have, n);
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memcpy (data, read_ptr, have);
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#ifdef _LIBC
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s = __mempcpy (s, read_ptr, have);
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#else
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memcpy (s, read_ptr, have);
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s += have;
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#endif
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fp->_IO_read_ptr = read_ptr + have;
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}
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return have;
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return s - (char *) data;
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}
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struct _IO_jump_t _IO_file_jumps =
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@ -53,7 +53,9 @@ __fopen_maybe_mmap (fp)
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if (_IO_SYSSTAT (fp, &st) == 0
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&& S_ISREG (st.st_mode) && st.st_size != 0
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/* Limit the file size to 1MB for 32-bit machines. */
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&& (sizeof (ptrdiff_t) > 4 || st.st_size < 1*1024*1024))
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&& (sizeof (ptrdiff_t) > 4 || st.st_size < 1*1024*1024)
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/* Sanity check. */
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&& (fp->_offset == _IO_pos_BAD || fp->_offset <= st.st_size))
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{
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/* Try to map the file. */
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void *p;
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@ -72,15 +74,17 @@ __fopen_maybe_mmap (fp)
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underflow functions which never tries to read
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anything from the file. */
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INTUSE(_IO_setb) (fp, p, (char *) p + st.st_size, 0);
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_IO_setg (fp, p, p, p);
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if (fp->_offset == _IO_pos_BAD)
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fp->_offset = 0;
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_IO_setg (fp, p, p + fp->_offset, p + fp->_offset);
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if (fp->_mode <= 0)
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_IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps_mmap;
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else
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_IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_wfile_jumps_mmap;
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fp->_wide_data->_wide_vtable = &_IO_wfile_jumps_mmap;
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fp->_offset = 0;
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}
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}
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}
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@ -56,7 +56,7 @@ tests := tstscanf test_rdwr test-popen tstgetln test-fseek \
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scanf1 scanf2 scanf3 scanf4 scanf5 scanf7 scanf8 scanf9 scanf10 \
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scanf11 scanf12 tst-tmpnam tst-cookie tst-obprintf tst-sscanf \
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tst-swprintf tst-fseek tst-fmemopen test-vfprintf tst-gets \
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tst-perror tst-sprintf tst-rndseek
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tst-perror tst-sprintf tst-rndseek tst-fdopen
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test-srcs = tst-unbputc tst-printf
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49
stdio-common/tst-fdopen.c
Normal file
49
stdio-common/tst-fdopen.c
Normal file
@ -0,0 +1,49 @@
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/* Test for fdopen bugs. */
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#define assert(x) \
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if (!(x)) \
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{ \
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fputs ("test failed: " #x "\n", stderr); \
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retval = 1; \
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goto the_end; \
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}
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char buffer[256];
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int
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main (int argc, char *argv[])
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{
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char *name;
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FILE *fp = NULL;
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int retval = 0;
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int c, fd;
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name = tmpnam (NULL);
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fp = fopen (name, "w");
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assert (fp != NULL)
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fputs ("foobar and baz", fp);
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fclose (fp);
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fp = NULL;
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fd = open (name, O_RDONLY);
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assert (fd != -1);
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assert (lseek (fd, 5, SEEK_SET) == 5);
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/* The file position indicator associated with the new stream is set to
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the position indicated by the file offset associated with the file
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descriptor. */
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fp = fdopen (fd, "r");
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assert (fp != NULL);
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assert (getc (fp) == 'r');
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assert (getc (fp) == ' ');
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the_end:
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if (fp != NULL)
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fclose (fp);
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unlink (name);
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return retval;
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}
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@ -18,6 +18,7 @@ main (int argc, char *argv[])
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FILE *fp = NULL;
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int retval = 0;
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int c;
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char buffer[64];
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name = tmpnam (NULL);
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fp = fopen (name, "w");
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@ -40,6 +41,17 @@ main (int argc, char *argv[])
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assert (feof (fp) == 0);
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assert (getc (fp) == c);
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assert (getc (fp) == EOF);
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fclose (fp);
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fp = NULL;
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fp = fopen (name, "r");
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assert (fp != NULL);
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assert (getc (fp) == 'b');
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assert (getc (fp) == 'l');
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assert (ungetc ('b', fp) == 'b');
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assert (fread (buffer, 1, 64, fp) == 2);
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assert (buffer[0] == 'b');
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assert (buffer[1] == 'a');
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the_end:
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if (fp != NULL)
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