105 строки
2.8 KiB
C
105 строки
2.8 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "opal_config.h"
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#include <string.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif /* HAVE_SYS_PARAM_H */
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#include <stdlib.h>
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#include <stdarg.h>
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#include "opal/util/os_path.h"
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static const char *path_sep = OPAL_PATH_SEP;
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char *opal_os_path(bool relative, ...)
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{
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va_list ap;
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char *element, *path;
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size_t num_elements, total_length;
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va_start(ap, relative);
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/* no way to protect ourselves from reading too far, so have to
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trust caller that they ended the list with the NULL */
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num_elements = 0;
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total_length = 0;
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while (NULL != (element = va_arg(ap, char*))) {
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num_elements++;
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total_length = total_length + strlen(element);
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if( path_sep[0] != element[0] ) total_length++;
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}
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va_end(ap);
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if (0 == num_elements) { /* must be looking for a simple answer */
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path = (char *)malloc(3);
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path[0] = '\0';
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if (relative) {
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strcpy(path, ".");
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strcat(path, path_sep);
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} else {
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strcpy(path, path_sep);
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}
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return(path);
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}
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/* setup path with enough room for the string terminator, the elements, and
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the separator between each of the elements */
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total_length = total_length + num_elements * strlen(path_sep) + 1;
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if(relative) {
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total_length++;
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}
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if (total_length > OPAL_PATH_MAX) { /* path length is too long - reject it */
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return(NULL);
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}
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path = (char *)malloc(total_length);
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if (NULL == path) {
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return(NULL);
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}
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path[0] = 0;
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if (relative) {
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strcpy(path, ".");
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}
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va_start(ap, relative);
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if( NULL != (element = va_arg(ap, char*)) ) {
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if (path_sep[0] != element[0]) {
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strcat(path, path_sep);
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}
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strcat(path, element);
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}
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while (NULL != (element=va_arg(ap, char*))) {
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if (path_sep[0] != element[0]) {
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strcat(path, path_sep);
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}
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strcat(path, element);
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}
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va_end(ap);
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return opal_make_filename_os_friendly(path);
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}
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