glibc/posix/bug-glob2.c

307 lines
6.8 KiB
C
Raw Normal View History

/* Test glob memory management.
for the filesystem access functions.
Copyright (C) 2001-2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
Prefer https to http for gnu.org and fsf.org URLs Also, change sources.redhat.com to sourceware.org. This patch was automatically generated by running the following shell script, which uses GNU sed, and which avoids modifying files imported from upstream: sed -ri ' s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g ' \ $(find $(git ls-files) -prune -type f \ ! -name '*.po' \ ! -name 'ChangeLog*' \ ! -path COPYING ! -path COPYING.LIB \ ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \ ! -path manual/texinfo.tex ! -path scripts/config.guess \ ! -path scripts/config.sub ! -path scripts/install-sh \ ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \ ! -path INSTALL ! -path locale/programs/charmap-kw.h \ ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \ ! '(' -name configure \ -execdir test -f configure.ac -o -f configure.in ';' ')' \ ! '(' -name preconfigure \ -execdir test -f preconfigure.ac ';' ')' \ -print) and then by running 'make dist-prepare' to regenerate files built from the altered files, and then executing the following to cleanup: chmod a+x sysdeps/unix/sysv/linux/riscv/configure # Omit irrelevant whitespace and comment-only changes, # perhaps from a slightly-different Autoconf version. git checkout -f \ sysdeps/csky/configure \ sysdeps/hppa/configure \ sysdeps/riscv/configure \ sysdeps/unix/sysv/linux/csky/configure # Omit changes that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines git checkout -f \ sysdeps/powerpc/powerpc64/ppc-mcount.S \ sysdeps/unix/sysv/linux/s390/s390-64/syscall.S # Omit change that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 05:40:42 +00:00
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <error.h>
#include <dirent.h>
#include <glob.h>
#include <mcheck.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
// #define DEBUG
#ifdef DEBUG
# define PRINTF(fmt, args...) \
do \
{ \
int save_errno = errno; \
printf (fmt, ##args); \
errno = save_errno; \
} while (0)
#else
# define PRINTF(fmt, args...)
#endif
#define LONG_NAME \
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" \
"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
static struct
{
const char *name;
int level;
int type;
mode_t mode;
} filesystem[] =
{
{ ".", 1, DT_DIR, 0755 },
{ "..", 1, DT_DIR, 0755 },
{ "dir", 1, DT_DIR, 0755 },
{ ".", 2, DT_DIR, 0755 },
{ "..", 2, DT_DIR, 0755 },
{ "readable", 2, DT_DIR, 0755 },
{ ".", 3, DT_DIR, 0755 },
{ "..", 3, DT_DIR, 0755 },
{ "a", 3, DT_REG, 0644 },
{ LONG_NAME, 3, DT_REG, 0644 },
{ "unreadable", 2, DT_DIR, 0111 },
{ ".", 3, DT_DIR, 0111 },
{ "..", 3, DT_DIR, 0755 },
{ "a", 3, DT_REG, 0644 },
{ "zz-readable", 2, DT_DIR, 0755 },
{ ".", 3, DT_DIR, 0755 },
{ "..", 3, DT_DIR, 0755 },
{ "a", 3, DT_REG, 0644 }
};
#define nfiles (sizeof (filesystem) / sizeof (filesystem[0]))
typedef struct
{
int level;
int idx;
struct dirent d;
char room_for_dirent[sizeof (LONG_NAME)];
} my_DIR;
static long int
find_file (const char *s)
{
int level = 1;
long int idx = 0;
if (strcmp (s, ".") == 0)
return 0;
if (s[0] == '.' && s[1] == '/')
s += 2;
while (*s != '\0')
{
char *endp = strchrnul (s, '/');
PRINTF ("looking for %.*s, level %d\n", (int) (endp - s), s, level);
while (idx < nfiles && filesystem[idx].level >= level)
{
if (filesystem[idx].level == level
&& memcmp (s, filesystem[idx].name, endp - s) == 0
&& filesystem[idx].name[endp - s] == '\0')
break;
++idx;
}
if (idx == nfiles || filesystem[idx].level < level)
{
errno = ENOENT;
return -1;
}
if (*endp == '\0')
return idx + 1;
if (filesystem[idx].type != DT_DIR
&& (idx + 1 >= nfiles
|| filesystem[idx].level >= filesystem[idx + 1].level))
{
errno = ENOTDIR;
return -1;
}
++idx;
s = endp + 1;
++level;
}
errno = ENOENT;
return -1;
}
static void *
my_opendir (const char *s)
{
long int idx = find_file (s);
my_DIR *dir;
if (idx == -1)
{
PRINTF ("my_opendir(\"%s\") == NULL (%m)\n", s);
return NULL;
}
if ((filesystem[idx].mode & 0400) == 0)
{
errno = EACCES;
PRINTF ("my_opendir(\"%s\") == NULL (%m)\n", s);
return NULL;
}
dir = (my_DIR *) malloc (sizeof (my_DIR));
if (dir == NULL)
{
printf ("cannot allocate directory handle: %m\n");
exit (EXIT_FAILURE);
}
dir->level = filesystem[idx].level;
dir->idx = idx;
PRINTF ("my_opendir(\"%s\") == { level: %d, idx: %ld }\n",
s, filesystem[idx].level, idx);
return dir;
}
static struct dirent *
my_readdir (void *gdir)
{
my_DIR *dir = gdir;
if (dir->idx == -1)
{
PRINTF ("my_readdir ({ level: %d, idx: %ld }) = NULL\n",
dir->level, (long int) dir->idx);
return NULL;
}
while (dir->idx < nfiles && filesystem[dir->idx].level > dir->level)
++dir->idx;
if (dir->idx == nfiles || filesystem[dir->idx].level < dir->level)
{
dir->idx = -1;
PRINTF ("my_readdir ({ level: %d, idx: %ld }) = NULL\n",
dir->level, (long int) dir->idx);
return NULL;
}
dir->d.d_ino = 1; /* glob should not skip this entry. */
dir->d.d_type = filesystem[dir->idx].type;
strcpy (dir->d.d_name, filesystem[dir->idx].name);
PRINTF ("my_readdir ({ level: %d, idx: %ld }) = { d_ino: %ld, d_type: %d, d_name: \"%s\" }\n",
dir->level, (long int) dir->idx, dir->d.d_ino, dir->d.d_type,
dir->d.d_name);
++dir->idx;
return &dir->d;
}
static void
my_closedir (void *dir)
{
PRINTF ("my_closedir ()\n");
free (dir);
}
/* We use this function for lstat as well since we don't have any. */
static int
my_stat (const char *name, struct stat *st)
{
long int idx = find_file (name);
if (idx == -1)
{
PRINTF ("my_stat (\"%s\", ...) = -1 (%m)\n", name);
return -1;
}
memset (st, '\0', sizeof (*st));
if (filesystem[idx].type == DT_UNKNOWN)
st->st_mode = DTTOIF (idx + 1 < nfiles
&& filesystem[idx].level < filesystem[idx + 1].level
? DT_DIR : DT_REG) | filesystem[idx].mode;
else
st->st_mode = DTTOIF (filesystem[idx].type) | filesystem[idx].mode;
PRINTF ("my_stat (\"%s\", { st_mode: %o }) = 0\n", name, st->st_mode);
return 0;
}
static void
init_glob_altdirfuncs (glob_t *pglob)
{
pglob->gl_closedir = my_closedir;
pglob->gl_readdir = my_readdir;
pglob->gl_opendir = my_opendir;
pglob->gl_lstat = my_stat;
pglob->gl_stat = my_stat;
}
int
do_test (void)
{
mtrace ();
glob_t gl;
memset (&gl, 0, sizeof (gl));
init_glob_altdirfuncs (&gl);
if (glob ("dir/*able/*", GLOB_ERR | GLOB_ALTDIRFUNC, NULL, &gl)
!= GLOB_ABORTED)
{
puts ("glob did not fail with GLOB_ABORTED");
2013-06-05 20:44:03 +00:00
exit (EXIT_FAILURE);
}
globfree (&gl);
memset (&gl, 0, sizeof (gl));
init_glob_altdirfuncs (&gl);
gl.gl_offs = 3;
if (glob ("dir2/*", GLOB_DOOFFS, NULL, &gl) != GLOB_NOMATCH)
{
puts ("glob did not fail with GLOB_NOMATCH");
2013-06-05 20:44:03 +00:00
exit (EXIT_FAILURE);
}
globfree (&gl);
muntrace ();
return 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"