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2f966bf3bf
openmpi/opal/util/path.c
Gilles Gouaillardet 277c319389 opal/util: fix (again and again) incorrect type casting in opal_path_df 
and silence CID 1371767

this fixes previous commits :
 - open-mpi/ompi@2eec8970ff
 - open-mpi/ompi@a439afce5b
2016-08-26 09:42:45 +09:00

715 строки
20 KiB
C
Исходник Ответственный История

/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2007 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2009-2014 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2010 IBM Corporation. All rights reserved.
* Copyright (c) 2012-2013 Los Alamos National Security, LLC.
* All rights reserved.
* Copyright (c) 2014 Intel, Inc. All rights reserved.
* Copyright (c) 2016 University of Houston. All rights reserved.
* Copyright (c) 2016 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "opal_config.h"
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SHLWAPI_H
#include <shlwapi.h>
#endif
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_MOUNT_H
#include <sys/mount.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_SYS_VFS_H
#include <sys/vfs.h>
#endif
#ifdef HAVE_SYS_STATFS_H
#include <sys/statfs.h>
#endif
#ifdef HAVE_SYS_STATVFS_H
#include <sys/statvfs.h>
#endif
#ifdef HAVE_SYS_MOUNT_H
#include <sys/mount.h>
#endif
#ifdef HAVE_MNTENT_H
#include <mntent.h>
#endif
#ifdef HAVE_PATHS_H
#include <paths.h>
#endif
#ifdef _PATH_MOUNTED
#define MOUNTED_FILE _PATH_MOUNTED
#else
#define MOUNTED_FILE "/etc/mtab"
#endif
#include "opal_stdint.h"
#include "opal/util/output.h"
#include "opal/util/path.h"
#include "opal/util/os_path.h"
#include "opal/util/argv.h"
/*
* Sanity check to ensure we have either statfs or statvfs
*/
#if !defined(HAVE_STATFS) && !defined(HAVE_STATVFS)
#error Must have either statfs() or statvfs()
#endif
/*
* Note that some OS's (e.g., NetBSD and Solaris) have statfs(), but
* no struct statfs (!). So check to make sure we have struct statfs
* before allowing the use of statfs().
*/
#if defined(HAVE_STATFS) && (defined(HAVE_STRUCT_STATFS_F_FSTYPENAME) || \
defined(HAVE_STRUCT_STATFS_F_TYPE))
#define USE_STATFS 1
#endif
static void path_env_load(char *path, int *pargc, char ***pargv);
static char *list_env_get(char *var, char **list);
bool opal_path_is_absolute( const char *path )
{
if( OPAL_PATH_SEP[0] == *path ) {
return true;
}
return false;
}
/**
* Locates a file with certain permissions
*/
char *opal_path_find(char *fname, char **pathv, int mode, char **envv)
{
char *fullpath;
char *delimit;
char *env;
char *pfix;
int i;
/* If absolute path is given, return it without searching. */
if( opal_path_is_absolute(fname) ) {
return opal_path_access(fname, NULL, mode);
}
/* Initialize. */
fullpath = NULL;
i = 0;
/* Consider each directory until the file is found. Thus, the
order of directories is important. */
while (pathv[i] && NULL == fullpath) {
/* Replace environment variable at the head of the string. */
if ('$' == *pathv[i]) {
delimit = strchr(pathv[i], OPAL_PATH_SEP[0]);
if (delimit) {
*delimit = '\0';
}
env = list_env_get(pathv[i]+1, envv);
if (delimit) {
*delimit = OPAL_PATH_SEP[0];
}
if (NULL != env) {
if (!delimit) {
fullpath = opal_path_access(fname, env, mode);
} else {
pfix = (char*) malloc(strlen(env) + strlen(delimit) + 1);
if (NULL == pfix) {
return NULL;
}
strcpy(pfix, env);
strcat(pfix, delimit);
fullpath = opal_path_access(fname, pfix, mode);
free(pfix);
}
}
}
else {
fullpath = opal_path_access(fname, pathv[i], mode);
}
i++;
}
return opal_make_filename_os_friendly(fullpath);
}
/*
* Locates a file with certain permissions from a list of search paths
*/
char *opal_path_findv(char *fname, int mode, char **envv, char *wrkdir)
{
char **dirv;
char *fullpath;
char *path;
int dirc;
int i;
bool found_dot = false;
/* Set the local search paths. */
dirc = 0;
dirv = NULL;
if (NULL != (path = list_env_get("PATH", envv))) {
path_env_load(path, &dirc, &dirv);
}
/* Replace the "." path by the working directory. */
if (NULL != wrkdir) {
for (i = 0; i < dirc; ++i) {
if (0 == strcmp(dirv[i], ".")) {
found_dot = true;
free(dirv[i]);
dirv[i] = strdup(wrkdir);
if (NULL == dirv[i]){
return NULL;
}
}
}
}
/* If we didn't find "." in the path and we have a wrkdir, append
the wrkdir to the end of the path */
if (!found_dot && NULL != wrkdir) {
opal_argv_append(&dirc, &dirv, wrkdir);
}
if(NULL == dirv)
return NULL;
fullpath = opal_path_find(fname, dirv, mode, envv);
opal_argv_free(dirv);
return fullpath;
}
/**
* Forms a complete pathname and checks it for existance and
* permissions
*
* Accepts:
* -fname File name
* -path Path prefix
* -mode Target permissions which must be satisfied
*
* Returns:
* -Full pathname of located file Success
* -NULL Failure
*/
char *opal_path_access(char *fname, char *path, int mode)
{
char *fullpath = NULL;
struct stat buf;
bool relative;
/* Allocate space for the full pathname. */
if (NULL == path) {
fullpath = opal_os_path(false, fname, NULL);
} else {
relative = !opal_path_is_absolute(path);
fullpath = opal_os_path(relative, path, fname, NULL);
}
if (NULL == fullpath) {
return NULL;
}
/* first check to see - is this a file or a directory? We
* only want files
*/
if (0 != stat(fullpath, &buf)) {
/* couldn't stat the path - obviously, this also meets the
* existence check, if that was requested
*/
free(fullpath);
return NULL;
}
if (!(S_IFREG & buf.st_mode) &&
!(S_IFLNK & buf.st_mode)) {
/* this isn't a regular file or a symbolic link, so
* ignore it
*/
free(fullpath);
return NULL;
}
/* check the permissions */
if ((X_OK & mode) && !(S_IXUSR & buf.st_mode)) {
/* if they asked us to check executable permission,
* and that isn't set, then return NULL
*/
free(fullpath);
return NULL;
}
if ((R_OK & mode) && !(S_IRUSR & buf.st_mode)) {
/* if they asked us to check read permission,
* and that isn't set, then return NULL
*/
free(fullpath);
return NULL;
}
if ((W_OK & mode) && !(S_IWUSR & buf.st_mode)) {
/* if they asked us to check write permission,
* and that isn't set, then return NULL
*/
free(fullpath);
return NULL;
}
/* must have met all criteria! */
return fullpath;
}
/**
*
* Loads argument array with $PATH env var.
*
* Accepts
* -path String contiaing the $PATH
* -argc Pointer to argc
* -argv Pointer to list of argv
*/
static void path_env_load(char *path, int *pargc, char ***pargv)
{
char *p;
char saved;
if (NULL == path) {
*pargc = 0;
return;
}
/* Loop through the paths (delimited by PATHENVSEP), adding each
one to argv. */
while ('\0' != *path) {
/* Locate the delimiter. */
for (p = path; *p && (*p != OPAL_ENV_SEP); ++p) {
continue;
}
/* Add the path. */
if (p != path) {
saved = *p;
*p = '\0';
opal_argv_append(pargc, pargv, path);
*p = saved;
path = p;
}
/* Skip past the delimiter, if present. */
if (*path) {
++path;
}
}
}
/**
* Gets value of variable in list or environment. Looks in the list first
*
* Accepts:
* -var String variable
* -list Pointer to environment list
*
* Returns:
* -List Pointer to environment list Success
* -NULL Failure
*/
static char *list_env_get(char *var, char **list)
{
size_t n;
if (NULL != list) {
n = strlen(var);
while (NULL != *list) {
if ((0 == strncmp(var, *list, n)) && ('=' == (*list)[n])) {
return (*list + n + 1);
}
++list;
}
}
return getenv(var);
}
/**
* Try to figure out the absolute path based on the application name
* (usually argv[0]). If the path is already absolute return a copy, if
* it start with . look into the current directory, if not dig into
* the $PATH.
* In case of error or if executable was not found (as an example if
* the application did a cwd between the start and this call), the
* function will return NULL. Otherwise, an newly allocated string
* will be returned.
*/
char* opal_find_absolute_path( char* app_name )
{
char* abs_app_name;
char cwd[OPAL_PATH_MAX], *pcwd;
if( opal_path_is_absolute(app_name) ) { /* already absolute path */
abs_app_name = app_name;
} else if ( '.' == app_name[0] ||
NULL != strchr(app_name, OPAL_PATH_SEP[0])) {
/* the app is in the current directory or below it */
pcwd = getcwd( cwd, OPAL_PATH_MAX );
if( NULL == pcwd ) {
/* too bad there is no way we can get the app absolute name */
return NULL;
}
abs_app_name = opal_os_path( false, pcwd, app_name, NULL );
} else {
/* Otherwise try to search for the application in the PATH ... */
abs_app_name = opal_path_findv( app_name, X_OK, NULL, NULL );
}
if( NULL != abs_app_name ) {
char* resolved_path = (char*)malloc(OPAL_PATH_MAX);
realpath( abs_app_name, resolved_path );
if( abs_app_name != app_name ) free(abs_app_name);
return resolved_path;
}
return NULL;
}
/**
* Read real FS type from /etc/mtab, needed to translate autofs fs type into real fs type
* TODO: solaris? OSX?
* Limitations: autofs on solaris/osx will be assumed as "nfs" type
*/
static char *opal_check_mtab(char *dev_path)
{
#ifdef HAVE_MNTENT_H
FILE * mtab = NULL;
struct mntent * part = NULL;
if ((mtab = setmntent(MOUNTED_FILE, "r")) != NULL) {
while (NULL != (part = getmntent(mtab))) {
if ((NULL != part->mnt_dir) &&
(NULL != part->mnt_type) &&
(0 == strcmp(part->mnt_dir, dev_path)))
{
endmntent(mtab);
return strdup(part->mnt_type);
}
}
endmntent(mtab);
}
#endif
return NULL;
}
/**
* @brief Figure out, whether fname is on network file system
*
* Try to figure out, whether the file name specified through fname is
* on any network file system (currently NFS, Lustre, Panasas and GPFS).
*
* If the file is not created, the parent directory is checked.
* This allows checking for NFS prior to opening the file.
*
* @fname[in] File name to check
* @fstype[out] File system type if retval is true
*
* @retval true If fname is on NFS, Lustre, Panasas or GPFS
* @retval false otherwise
*
*
* Linux:
* statfs(const char *path, struct statfs *buf);
* with fsid_t f_fsid; (in kernel struct{ int val[2] };)
* return 0 success, -1 on failure with errno set.
* statvfs (const char *path, struct statvfs *buf);
* with unsigned long f_fsid; -- returns wrong info
* return 0 success, -1 on failure with errno set.
* Solaris:
* statvfs (const char *path, struct statvfs *buf);
* with f_basetype, contains a string of length FSTYPSZ
* return 0 success, -1 on failure with errno set.
* FreeBSD:
* statfs(const char *path, struct statfs *buf);
* with f_fstypename, contains a string of length MFSNAMELEN
* return 0 success, -1 on failure with errno set.
* compliant with: 4.4BSD.
* NetBSD:
* statvfs (const char *path, struct statvfs *buf);
* with f_fstypename, contains a string of length VFS_NAMELEN
* return 0 success, -1 on failure with errno set.
* Mac OSX (10.6.2 through 10.9):
* statvfs(const char * restrict path, struct statvfs * restrict buf);
* with fsid Not meaningful in this implementation.
* is just a wrapper around statfs()
* statfs(const char *path, struct statfs *buf);
* with f_fstypename, contains a string of length MFSTYPENAMELEN
* return 0 success, -1 on failure with errno set.
*/
#ifndef LL_SUPER_MAGIC
#define LL_SUPER_MAGIC 0x0BD00BD0 /* Lustre magic number */
#endif
#ifndef NFS_SUPER_MAGIC
#define NFS_SUPER_MAGIC 0x6969
#endif
#ifndef PAN_KERNEL_FS_CLIENT_SUPER_MAGIC
#define PAN_KERNEL_FS_CLIENT_SUPER_MAGIC 0xAAD7AAEA /* Panasas FS */
#endif
#ifndef GPFS_SUPER_MAGIC
#define GPFS_SUPER_MAGIC 0x47504653 /* Thats GPFS in ASCII */
#endif
#ifndef AUTOFS_SUPER_MAGIC
#define AUTOFS_SUPER_MAGIC 0x0187
#endif
#ifndef PVFS2_SUPER_MAGIC
#define PVFS2_SUPER_MAGIC 0x20030528
#endif
#define MASK2 0xffff
#define MASK4 0xffffffff
bool opal_path_nfs(char *fname, char **ret_fstype)
{
int i;
int fsrc = -1;
int vfsrc = -1;
int trials;
char * file = strdup (fname);
#if defined(USE_STATFS)
struct statfs fsbuf;
#endif
#if defined(HAVE_STATVFS)
struct statvfs vfsbuf;
#endif
/*
* Be sure to update the test (test/util/opal_path_nfs.c)
* while adding a new Network/Cluster Filesystem here
*/
static struct fs_types_t {
unsigned long long f_fsid;
unsigned long long f_mask;
const char * f_fsname;
} fs_types[] = {
{LL_SUPER_MAGIC, MASK4, "lustre"},
{NFS_SUPER_MAGIC, MASK2, "nfs"},
{AUTOFS_SUPER_MAGIC, MASK2, "autofs"},
{PAN_KERNEL_FS_CLIENT_SUPER_MAGIC, MASK4, "panfs"},
{GPFS_SUPER_MAGIC, MASK4, "gpfs"},
{PVFS2_SUPER_MAGIC, MASK4, "pvfs2"}
};
#define FS_TYPES_NUM (int)(sizeof (fs_types)/sizeof (fs_types[0]))
/*
* First, get the OS-dependent struct stat(v)fs buf. This may
* return the ESTALE error on NFS, if the underlying file/path has
* changed.
*/
again:
#if defined(USE_STATFS)
trials = 5;
do {
fsrc = statfs(file, &fsbuf);
} while (-1 == fsrc && ESTALE == errno && (0 < --trials));
#endif
#if defined(HAVE_STATVFS)
trials = 5;
do {
vfsrc = statvfs(file, &vfsbuf);
} while (-1 == vfsrc && ESTALE == errno && (0 < --trials));
#endif
/* In case some error with the current filename, try the parent
directory */
if (-1 == fsrc && -1 == vfsrc) {
char * last_sep;
OPAL_OUTPUT_VERBOSE((10, 0, "opal_path_nfs: stat(v)fs on file:%s failed errno:%d directory:%s\n",
fname, errno, file));
if (EPERM == errno) {
free(file);
if ( NULL != ret_fstype ) {
*ret_fstype = NULL;
}
return false;
}
last_sep = strrchr(file, OPAL_PATH_SEP[0]);
/* Stop the search, when we have searched past root '/' */
if (NULL == last_sep || (1 == strlen(last_sep) &&
OPAL_PATH_SEP[0] == *last_sep)) {
free (file);
if ( NULL != ret_fstype ) {
*ret_fstype=NULL;
}
return false;
}
*last_sep = '\0';
goto again;
}
/* Next, extract the magic value */
for (i = 0; i < FS_TYPES_NUM; i++) {
#if defined(USE_STATFS)
/* These are uses of struct statfs */
# if defined(HAVE_STRUCT_STATFS_F_FSTYPENAME)
if (0 == fsrc &&
0 == strncasecmp(fs_types[i].f_fsname, fsbuf.f_fstypename,
sizeof(fsbuf.f_fstypename))) {
goto found;
}
# endif
# if defined(HAVE_STRUCT_STATFS_F_TYPE)
if (0 == fsrc &&
fs_types[i].f_fsid == (fsbuf.f_type & fs_types[i].f_mask)) {
goto found;
}
# endif
#endif
#if defined(HAVE_STATVFS)
/* These are uses of struct statvfs */
# if defined(HAVE_STRUCT_STATVFS_F_BASETYPE)
if (0 == vfsrc &&
0 == strncasecmp(fs_types[i].f_fsname, vfsbuf.f_basetype,
sizeof(vfsbuf.f_basetype))) {
goto found;
}
# endif
# if defined(HAVE_STRUCT_STATVFS_F_FSTYPENAME)
if (0 == vfsrc &&
0 == strncasecmp(fs_types[i].f_fsname, vfsbuf.f_fstypename,
sizeof(vfsbuf.f_fstypename))) {
goto found;
}
# endif
#endif
}
free (file);
if ( NULL != ret_fstype ) {
*ret_fstype=NULL;
}
return false;
found:
free (file);
if (AUTOFS_SUPER_MAGIC == fs_types[i].f_fsid) {
char *fs_type = opal_check_mtab(fname);
int x;
if (NULL != fs_type) {
for (x = 0; x < FS_TYPES_NUM; x++) {
if (AUTOFS_SUPER_MAGIC == fs_types[x].f_fsid) {
continue;
}
if (0 == strcasecmp(fs_types[x].f_fsname, fs_type)) {
OPAL_OUTPUT_VERBOSE((10, 0, "opal_path_nfs: file:%s on fs:%s\n", fname, fs_type));
free(fs_type);
if ( NULL != ret_fstype ) {
*ret_fstype = strdup(fs_types[x].f_fsname);
}
return true;
}
}
free(fs_type);
if ( NULL != ret_fstype ) {
*ret_fstype=NULL;
}
return false;
}
}
OPAL_OUTPUT_VERBOSE((10, 0, "opal_path_nfs: file:%s on fs:%s\n",
fname, fs_types[i].f_fsname));
if ( NULL != ret_fstype ) {
*ret_fstype = strdup (fs_types[i].f_fsname);
}
return true;
#undef FS_TYPES_NUM
}
int
opal_path_df(const char *path,
uint64_t *out_avail)
{
int rc = -1;
int trials = 5;
int err = 0;
#if defined(USE_STATFS)
struct statfs buf;
#elif defined(HAVE_STATVFS)
struct statvfs buf;
#endif
if (NULL == path || NULL == out_avail) {
return OPAL_ERROR;
}
*out_avail = 0;
do {
#if defined(USE_STATFS)
rc = statfs(path, &buf);
#elif defined(HAVE_STATVFS)
rc = statvfs(path, &buf);
#endif
err = errno;
} while (-1 == rc && ESTALE == err && (--trials > 0));
if (-1 == rc) {
OPAL_OUTPUT_VERBOSE((10, 2, "opal_path_df: stat(v)fs on "
"path: %s failed with errno: %d (%s)\n",
path, err, strerror(err)));
return OPAL_ERROR;
}
/* now set the amount of free space available on path */
/* sometimes buf.f_bavail is negative */
*out_avail = (uint64_t)buf.f_bsize * (uint64_t)((long)buf.f_bavail < 0 ? 0 : buf.f_bavail);
OPAL_OUTPUT_VERBOSE((10, 2, "opal_path_df: stat(v)fs states "
"path: %s has %"PRIu64 " B of free space.",
path, *out_avail));
return OPAL_SUCCESS;
}
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