317 строки
8.1 KiB
C
317 строки
8.1 KiB
C
/*
|
|
* 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.
|
|
* $COPYRIGHT$
|
|
*
|
|
* Additional copyrights may follow
|
|
*
|
|
* $HEADER$
|
|
*/
|
|
|
|
#include "opal_config.h"
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#if defined(__WINDOWS__)
|
|
#include <shlwapi.h>
|
|
#endif /* defined(__WINDOWS__) */
|
|
|
|
#include "opal/util/path.h"
|
|
#include "opal/util/os_path.h"
|
|
#include "opal/util/argv.h"
|
|
#include "opal/util/output.h"
|
|
|
|
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 defined(__WINDOWS__)
|
|
/* On Windows an absolute path always start with [a-z]:\ or with \\ */
|
|
if( (isalpha(path[0]) && (':' == path[1])) ||
|
|
('\\' == path[0]) && ('\\' == path[1]) ) return true;
|
|
#else
|
|
if( OPAL_PATH_SEP[0] == *path ) {
|
|
return true;
|
|
}
|
|
#endif /* defined(__WINDOWS__) */
|
|
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, "", 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;
|
|
|
|
/* Allocate space for the full pathname. */
|
|
if( NULL == path ) {
|
|
fullpath = opal_os_path( false, fname, NULL );
|
|
} else {
|
|
fullpath = opal_os_path( false, path, fname, NULL );
|
|
}
|
|
if( NULL == fullpath )
|
|
return NULL;
|
|
|
|
/* Get status on the full path name to check for existance. Then
|
|
check the permissions. */
|
|
|
|
if (access(fullpath, mode)) {
|
|
free(fullpath);
|
|
fullpath = NULL;
|
|
}
|
|
|
|
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;
|
|
|
|
if( opal_path_is_absolute(app_name) ) { /* already absolute path */
|
|
abs_app_name = app_name;
|
|
} else if( '.' == app_name[0] ) { /* the app is in the current directory */
|
|
char cwd[PATH_MAX], *pcwd;
|
|
pcwd = getcwd( cwd, 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[PATH_MAX];
|
|
#if !defined(__WINDOWS__)
|
|
realpath( abs_app_name, resolved_path );
|
|
#else
|
|
PathCanonicalize(resolved_path, abs_app_name);
|
|
#endif /* !defined(__WINDOWS__) */
|
|
if( abs_app_name != app_name ) free(abs_app_name);
|
|
return strdup(resolved_path);
|
|
}
|
|
return NULL;
|
|
}
|