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tests: replace fread by xfread
With fortification enabled, fread calls return result needs to be checked, has it gets the __wur macro enabled. Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
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@ -3,6 +3,7 @@
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#include <stdlib.h>
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#include <unistd.h>
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#include <support/xstdio.h>
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static char *fname;
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@ -48,7 +49,7 @@ do_test (void)
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perror ("fopen(\"r\")");
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}
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fread (buf, 3, 1, f);
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xfread (buf, 3, 1, f);
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errno = 0;
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if (fseek (f, -10, SEEK_CUR) == 0)
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{
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@ -72,7 +73,7 @@ Got %d instead\n",
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perror ("fopen(\"r+\")");
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}
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fread (buf, 3, 1, f);
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xfread (buf, 3, 1, f);
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errno = 0;
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if (fseek (f, -10, SEEK_CUR) == 0)
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{
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@ -96,7 +97,7 @@ Got %d instead\n",
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perror ("fopen(\"r+\")");
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}
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fread (buf, 3, 1, f);
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xfread (buf, 3, 1, f);
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if (ftell (f) != 3)
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{
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puts ("ftell failed");
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@ -1,6 +1,8 @@
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#include <stdio.h>
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#include <string.h>
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#include <support/xstdio.h>
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char x[4096], z[4096], b[21], m[4096 * 4];
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int
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@ -20,24 +22,24 @@ main (void)
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}
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rewind (f);
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fread (m, 4096 * 4 - 10, 1, f);
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fread (b, 20, 1, f);
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xfread (m, 4096 * 4 - 10, 1, f);
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xfread (b, 20, 1, f);
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printf ("got %s (should be %s)\n", b, "zzzzzzzzzzxxxxxxxxxx");
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if (strcmp (b, "zzzzzzzzzzxxxxxxxxxx"))
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failed = 1;
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fseek (f, -40, SEEK_CUR);
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fread (b, 20, 1, f);
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xfread (b, 20, 1, f);
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printf ("got %s (should be %s)\n", b, "zzzzzzzzzzzzzzzzzzzz");
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if (strcmp (b, "zzzzzzzzzzzzzzzzzzzz"))
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failed = 1;
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fread (b, 20, 1, f);
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xfread (b, 20, 1, f);
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printf ("got %s (should be %s)\n", b, "zzzzzzzzzzxxxxxxxxxx");
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if (strcmp (b, "zzzzzzzzzzxxxxxxxxxx"))
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failed = 1;
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fread (b, 20, 1, f);
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xfread (b, 20, 1, f);
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printf ("got %s (should be %s)\n", b, "xxxxxxxxxxxxxxxxxxxx");
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if (strcmp (b, "xxxxxxxxxxxxxxxxxxxx"))
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failed = 1;
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@ -1,6 +1,8 @@
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#include <stdio.h>
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#include <string.h>
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#include <support/xstdio.h>
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int
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main (void)
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{
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@ -32,7 +34,7 @@ main (void)
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char buf[25];
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buf[0] = j;
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fread (buf + 1, 1, 23, f);
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xfread (buf + 1, 1, 23, f);
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buf[24] = '\0';
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if (strcmp (buf, "Where does this text go?") != 0)
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{
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@ -2,6 +2,8 @@
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#include <unistd.h>
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#include <string.h>
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#include <support/xstdio.h>
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int stdio_block_read = 1, stdio_block_write = 1;
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int
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@ -30,7 +32,7 @@ main (int argc, char *argv[])
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fseek (f, 8180L, 0);
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fwrite ("Where does this text come from?", 1, 31, f);
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fseek (f, 8180L, 0);
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fread (buffer, 1, 31, f);
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xfread (buffer, 1, 31, f);
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fwrite (buffer, 1, 31, stdout);
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fclose (f);
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remove (filename);
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@ -5,6 +5,8 @@
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#include <stdio.h>
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#include <support/xstdio.h>
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#define THE_COOKIE ((void *) 0xdeadbeeful)
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@ -77,7 +79,8 @@ do_test (void)
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f = fopencookie (THE_COOKIE, "r+", fcts);
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fread (buf, 1, 1, f);
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xfread (buf, 1, 1, f);
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fwrite (buf, 1, 1, f);
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fseek (f, 0, SEEK_CUR);
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fclose (f);
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@ -21,6 +21,8 @@
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#include <string.h>
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#include <sys/types.h>
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#include <support/xstdio.h>
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static void
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print_buffer (const char *s, size_t n)
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{
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@ -153,7 +155,7 @@ do_test_read_seek_neg (const char *mode, const char *expected)
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FILE *fp = fmemopen (buf, sizeof (buf), mode);
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fseek (fp, offset, SEEK_END);
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fread (tmp, tmps, 1, fp);
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xfread (tmp, tmps, 1, fp);
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if (memcmp (tmp, expected, tmps) != 0)
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{
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@ -125,6 +125,7 @@ libsupport-routines = \
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xfclose \
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xfopen \
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xfork \
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xfread \
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xfreopen \
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xftruncate \
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xgetline \
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39
support/xfread.c
Normal file
39
support/xfread.c
Normal file
@ -0,0 +1,39 @@
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/* fread with error checking.
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Copyright (C) 2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <support/xstdio.h>
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#include <support/check.h>
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#include <stdlib.h>
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void
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xfread (void *ptr, size_t size, size_t nmemb, FILE *stream)
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{
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size_t count = 0;
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char *p = ptr;
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while (count < nmemb)
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{
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size_t ret = fread (p, size, nmemb - count, stream);
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if (ret <= 0 && ferror(stream))
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FAIL_EXIT1 ("read of %zu bytes failed after %td: %m",
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size * nmemb, p - (char *) ptr);
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count += ret;
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p += size * ret;
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}
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}
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@ -27,6 +27,7 @@ __BEGIN_DECLS
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FILE *xfopen (const char *path, const char *mode);
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void xfclose (FILE *);
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FILE *xfreopen (const char *path, const char *mode, FILE *stream);
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void xfread (void *ptr, size_t size, size_t nmemb, FILE *stream);
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/* Read a line from FP, using getline. *BUFFER must be NULL, or a
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heap-allocated pointer of *LENGTH bytes. Return the number of
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