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authorUlrich Drepper <drepper@redhat.com>2002-06-25 19:33:56 +0000
committerUlrich Drepper <drepper@redhat.com>2002-06-25 19:33:56 +0000
commitc42924899320727fd22d17c944a473bab0f55bb7 (patch)
tree4a54ddb8cac453ea5a36e4446559730325edf1ce /libio
parent51909ff7bf4563b53e6ffaf07a8e8e0af79d322f (diff)
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Update.
* libio/fileops.c (_IO_file_xsgetn_mmap): Always set EOF flag is not enough content is available. * libio/tst-eof.c: New file. * libio/Makefile (tests): Add tst-eof. * libio/fileops.c (_IO_file_underflow_mmap): Read a single byte to update atime. * libio/tst-atime.c: New file. * libio/Makefile (tests): Add tst-atime.
Diffstat (limited to 'libio')
-rw-r--r--libio/Makefile2
-rw-r--r--libio/fileops.c17
-rw-r--r--libio/tst-atime.c97
-rw-r--r--libio/tst-eof.c79
4 files changed, 188 insertions, 7 deletions
diff --git a/libio/Makefile b/libio/Makefile
index 36c8ba60db..59948668b2 100644
--- a/libio/Makefile
+++ b/libio/Makefile
@@ -49,7 +49,7 @@ routines := \
tests = tst_swprintf tst_wprintf tst_swscanf tst_wscanf tst_getwc tst_putwc \
tst_wprintf2 tst-widetext test-fmemopen tst-ext tst-fopenloc \
tst-fgetws tst-ungetwc1 tst-ungetwc2 tst-swscanf tst-sscanf \
- tst-mmap-setvbuf bug-ungetwc1 bug-ungetwc2
+ tst-mmap-setvbuf bug-ungetwc1 bug-ungetwc2 tst-atime tst-eof
test-srcs = test-freopen
all: # Make this the default target; it will be defined in Rules.
diff --git a/libio/fileops.c b/libio/fileops.c
index 42bba7aa21..20794955a8 100644
--- a/libio/fileops.c
+++ b/libio/fileops.c
@@ -608,6 +608,13 @@ _IO_file_underflow_mmap (_IO_FILE *fp)
{
if (fp->_IO_read_end < fp->_IO_buf_end)
{
+ /* A stupid requirement in POSIX says that the first read on a
+ stream must update the atime. Just read a single byte. We
+ don't have to worry about repositioning the file descriptor
+ since the following seek defines its position anyway. */
+ char ignore[1];
+ read (fp->_fileno, ignore, 1);
+
if (
# ifdef _G_LSEEK64
_G_LSEEK64 (fp->_fileno, fp->_IO_buf_end - fp->_IO_buf_base,
@@ -1262,12 +1269,10 @@ _IO_file_xsgetn_mmap (fp, data, n)
}
}
- if (have == 0)
- {
- if (s == (char *) data)
- fp->_flags |= _IO_EOF_SEEN;
- }
- else
+ if (have < n)
+ fp->_flags |= _IO_EOF_SEEN;
+
+ if (have != 0)
{
have = MIN (have, n);
#ifdef _LIBC
diff --git a/libio/tst-atime.c b/libio/tst-atime.c
new file mode 100644
index 0000000000..2df64c3382
--- /dev/null
+++ b/libio/tst-atime.c
@@ -0,0 +1,97 @@
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+
+static int do_test (void);
+#define TEST_FUNCTION do_test ()
+#define TIMEOUT 5
+#include <test-skeleton.c>
+
+
+static int
+do_test (void)
+{
+ char *buf;
+ int fd;
+ FILE *fp;
+ int ch;
+ struct stat st1;
+ struct stat st2;
+
+ buf = (char *) malloc (strlen (test_dir) + sizeof "/tst-atime.XXXXXX");
+ if (buf == NULL)
+ {
+ printf ("cannot allocate memory: %m\n");
+ return 1;
+ }
+ stpcpy (stpcpy (buf, test_dir), "/tst-atime.XXXXXX");
+
+ fd = mkstemp (buf);
+ if (fd == -1)
+ {
+ printf ("cannot open temporary file: %m\n");
+ return 1;
+ }
+
+ /* Make sure it gets removed. */
+ add_temp_file (buf);
+
+ if (write (fd, "some string\n", 12) != 12)
+ {
+ printf ("cannot write temporary file: %m\n");
+ return 1;
+ }
+
+ if (lseek (fd, 0, SEEK_SET) == (off_t) -1)
+ {
+ printf ("cannot reposition temporary file: %m\n");
+ return 1;
+ }
+
+ fp = fdopen (fd, "r");
+ if (fp == NULL)
+ {
+ printf ("cannot create stream: %m\n");
+ return 1;
+ }
+
+ if (fstat (fd, &st1) == -1)
+ {
+ printf ("first stat failed: %m\n");
+ return 1;
+ }
+
+ sleep (2);
+
+ ch = fgetc (fp);
+ if (ch != 's')
+ {
+ printf ("did not read correct character: got '%c', expected 's'\n", ch);
+ return 1;
+ }
+
+ if (fstat (fd, &st2) == -1)
+ {
+ printf ("second stat failed: %m\n");
+ return 1;
+ }
+
+ if (st1.st_atime > st2.st_atime)
+ {
+ puts ("second atime smaller");
+ return 1;
+ }
+ else if (st1.st_atime == st2.st_atime)
+ {
+ puts ("atime has not changed");
+ return 1;
+ }
+
+ fclose (fp);
+
+ return 0;
+}
diff --git a/libio/tst-eof.c b/libio/tst-eof.c
new file mode 100644
index 0000000000..627eaf8ac5
--- /dev/null
+++ b/libio/tst-eof.c
@@ -0,0 +1,79 @@
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+
+static int do_test (void);
+#define TEST_FUNCTION do_test ()
+#include <test-skeleton.c>
+
+
+static int
+do_test (void)
+{
+ char *buf;
+ int fd;
+ FILE *fp;
+ int ch;
+ char tm[20];
+
+ buf = (char *) malloc (strlen (test_dir) + sizeof "/tst-eof.XXXXXX");
+ if (buf == NULL)
+ {
+ printf ("cannot allocate memory: %m\n");
+ return 1;
+ }
+ stpcpy (stpcpy (buf, test_dir), "/tst-eof.XXXXXX");
+
+ fd = mkstemp (buf);
+ if (fd == -1)
+ {
+ printf ("cannot open temporary file: %m\n");
+ return 1;
+ }
+
+ /* Make sure it gets removed. */
+ add_temp_file (buf);
+
+ if (write (fd, "some string\n", 12) != 12)
+ {
+ printf ("cannot write temporary file: %m\n");
+ return 1;
+ }
+
+ if (lseek (fd, 0, SEEK_SET) == (off_t) -1)
+ {
+ printf ("cannot reposition temporary file: %m\n");
+ return 1;
+ }
+
+ fp = fdopen (fd, "r");
+ if (fp == NULL)
+ {
+ printf ("cannot create stream: %m\n");
+ return 1;
+ }
+
+ if (feof (fp))
+ {
+ puts ("EOF set after fdopen");
+ return 1;
+ }
+
+ if (fread (buf, 1, 20, fp) != 12)
+ {
+ puts ("didn't read the correct number of bytes");
+ return 1;
+ }
+
+ if (! feof (fp))
+ {
+ puts ("EOF not set after fread");
+ return 1;
+ }
+
+ fclose (fp);
+
+ return 0;
+}