forked from Imagelibrary/rtems
112 lines
2.4 KiB
C
112 lines
2.4 KiB
C
/*
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* COPYRIGHT (c) 2012-2013 Chris Johns <chrisj@rtems.org>
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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/**
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* @file
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*
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* @ingroup rtl
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*
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* @brief RTEMS Run-Time Linker Error
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <errno.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <rtems/libio_.h>
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#include <rtems/rtl/rtl.h>
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#include "rtl-find-file.h"
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#include "rtl-error.h"
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#include "rtl-string.h"
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#include <rtems/rtl/rtl-trace.h>
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#if WAF_BUILD
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#define rtems_filesystem_is_delimiter rtems_filesystem_is_separator
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#endif
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bool
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rtems_rtl_find_file (const char* name,
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const char* paths,
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const char** file_name,
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size_t* size)
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{
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struct stat sb;
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*file_name = NULL;
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*size = 0;
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if (rtems_filesystem_is_delimiter (name[0]) || (name[0] == '.'))
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{
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if (stat (name, &sb) == 0)
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*file_name = rtems_rtl_strdup (name);
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}
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else if (paths)
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{
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const char* start;
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const char* end;
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int len;
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char* fname;
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start = paths;
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end = start + strlen (paths);
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len = strlen (name);
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while (!*file_name && (start != end))
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{
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const char* delimiter = strchr (start, ':');
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if (delimiter == NULL)
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delimiter = end;
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/*
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* Allocate the path fragment, separator, name, terminating nul. Form the
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* path then see if the stat call works.
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*/
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fname = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_OBJECT,
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(delimiter - start) + 1 + len + 1, true);
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if (!fname)
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{
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rtems_rtl_set_error (ENOMEM, "no memory searching for file");
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return false;
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}
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memcpy (fname, start, delimiter - start);
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fname[delimiter - start] = '/';
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memcpy (fname + (delimiter - start) + 1, name, len);
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if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD))
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printf ("rtl: find-file: path: %s\n", fname);
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if (stat (fname, &sb) < 0)
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rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_OBJECT, fname);
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else
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*file_name = fname;
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start = delimiter;
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if (start != end)
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++start;
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}
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}
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if (!*file_name)
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return false;
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*size = sb.st_size;
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return true;
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}
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