1 | /* |
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2 | * COPYRIGHT (c) 2012-2013 Chris Johns <chrisj@rtems.org> |
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3 | * |
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4 | * The license and distribution terms for this file may be |
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5 | * found in the file LICENSE in this distribution or at |
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6 | * http://www.rtems.com/license/LICENSE. |
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7 | */ |
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8 | /** |
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9 | * @file |
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10 | * |
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11 | * @ingroup rtl |
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12 | * |
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13 | * @brief RTEMS Run-Time Linker Error |
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14 | */ |
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15 | |
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16 | #if HAVE_CONFIG_H |
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17 | #include "config.h" |
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18 | #endif |
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19 | |
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20 | #include <errno.h> |
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21 | #include <fcntl.h> |
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22 | #include <inttypes.h> |
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23 | #include <stdlib.h> |
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24 | #include <stdio.h> |
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25 | #include <unistd.h> |
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26 | |
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27 | #include <rtems/libio_.h> |
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28 | |
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29 | #include <rtems/rtl/rtl.h> |
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30 | #include "rtl-find-file.h" |
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31 | #include "rtl-error.h" |
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32 | #include "rtl-string.h" |
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33 | #include "rtl-trace.h" |
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34 | |
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35 | #if WAF_BUILD |
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36 | #define rtems_filesystem_is_delimiter rtems_filesystem_is_separator |
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37 | #endif |
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38 | |
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39 | bool |
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40 | rtems_rtl_find_file (const char* name, |
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41 | const char* paths, |
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42 | const char** file_name, |
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43 | size_t* size) |
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44 | { |
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45 | struct stat sb; |
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46 | |
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47 | *file_name = NULL; |
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48 | *size = 0; |
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49 | |
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50 | if (rtems_filesystem_is_delimiter (name[0]) || (name[0] == '.')) |
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51 | { |
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52 | if (stat (name, &sb) == 0) |
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53 | *file_name = rtems_rtl_strdup (name); |
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54 | } |
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55 | else if (paths) |
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56 | { |
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57 | const char* start; |
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58 | const char* end; |
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59 | int len; |
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60 | char* fname; |
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61 | |
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62 | start = paths; |
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63 | end = start + strlen (paths); |
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64 | len = strlen (name); |
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65 | |
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66 | while (!*file_name && (start != end)) |
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67 | { |
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68 | const char* delimiter = strchr (start, ':'); |
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69 | |
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70 | if (delimiter == NULL) |
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71 | delimiter = end; |
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72 | |
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73 | /* |
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74 | * Allocate the path fragment, separator, name, terminating nul. Form the |
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75 | * path then see if the stat call works. |
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76 | */ |
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77 | |
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78 | fname = rtems_rtl_alloc_new (RTEMS_RTL_ALLOC_OBJECT, |
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79 | (delimiter - start) + 1 + len + 1, true); |
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80 | if (!fname) |
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81 | { |
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82 | rtems_rtl_set_error (ENOMEM, "no memory searching for file"); |
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83 | return false; |
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84 | } |
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85 | |
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86 | memcpy (fname, start, delimiter - start); |
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87 | fname[delimiter - start] = '/'; |
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88 | memcpy (fname + (delimiter - start) + 1, name, len); |
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89 | |
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90 | if (rtems_rtl_trace (RTEMS_RTL_TRACE_LOAD)) |
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91 | printf ("rtl: find-file: path: %s\n", fname); |
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92 | |
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93 | if (stat (fname, &sb) < 0) |
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94 | rtems_rtl_alloc_del (RTEMS_RTL_ALLOC_OBJECT, fname); |
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95 | else |
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96 | *file_name = fname; |
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97 | |
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98 | start = delimiter; |
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99 | if (start != end) |
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100 | ++start; |
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101 | } |
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102 | } |
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103 | |
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104 | if (!*file_name) |
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105 | return false; |
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106 | |
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107 | *size = sb.st_size; |
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108 | |
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109 | return true; |
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110 | } |
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