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/*
* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2005 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) 2018 Cisco Systems, Inc. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "opal_config.h"
#include <string.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif /* HAVE_SYS_PARAM_H */
#include <stdarg.h>
#include <stdlib.h>
#include "opal/util/os_path.h"
static const char *path_sep = OPAL_PATH_SEP;
char *opal_os_path(int relative, ...)
{
va_list ap;
char *element, *path;
size_t num_elements, total_length;
va_start(ap, relative);
/* no way to protect ourselves from reading too far, so have to
trust caller that they ended the list with the NULL */
num_elements = 0;
total_length = 0;
while (NULL != (element = va_arg(ap, char *))) {
num_elements++;
total_length = total_length + strlen(element);
if (path_sep[0] != element[0]) {
total_length++;
}
}
va_end(ap);
if (0 == num_elements) { /* must be looking for a simple answer */
size_t len = 3;
path = (char *) calloc(len, sizeof(char));
if (relative) {
path[0] = '.';
}
strncat(path, path_sep, len - 1);
return (path);
}
/* setup path with enough room for the string terminator, the elements, and
the separator between each of the elements */
total_length = total_length + num_elements * strlen(path_sep) + 1;
if (relative) {
total_length++;
}
if (total_length > OPAL_PATH_MAX) { /* path length is too long - reject it */
return (NULL);
}
path = (char *) calloc(total_length, sizeof(char));
if (NULL == path) {
return (NULL);
}
if (relative) {
path[0] = '.';
}
va_start(ap, relative);
if (NULL != (element = va_arg(ap, char *))) {
if (path_sep[0] != element[0]) {
strncat(path, path_sep, total_length - strlen(path) - 1);
}
strncat(path, element, total_length - strlen(path) - 1);
}
while (NULL != (element = va_arg(ap, char *))) {
if (path_sep[0] != element[0]) {
strncat(path, path_sep, total_length - strlen(path) - 1);
}
strncat(path, element, total_length - strlen(path) - 1);
}
va_end(ap);
return opal_make_filename_os_friendly(path);
}
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