[279] | 1 | /*
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| 2 | ** file.c - File class
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| 3 | */
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| 4 |
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| 5 | #include "mruby.h"
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| 6 | #include "mruby/class.h"
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| 7 | #include "mruby/data.h"
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| 8 | #include "mruby/string.h"
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| 9 | #include "mruby/ext/io.h"
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| 10 |
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| 11 | #if MRUBY_RELEASE_NO < 10000
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| 12 | #include "error.h"
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| 13 | #else
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| 14 | #include "mruby/error.h"
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| 15 | #endif
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| 16 |
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| 17 | #include <sys/types.h>
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| 18 | #include <sys/stat.h>
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| 19 |
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| 20 | #include <fcntl.h>
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| 21 | #include <limits.h>
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| 22 |
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| 23 | #include <errno.h>
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| 24 | #include <stdlib.h>
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| 25 | #include <string.h>
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| 26 | #if defined(_WIN32) || defined(_WIN64)
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| 27 | #define NULL_FILE "NUL"
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| 28 | #define UNLINK _unlink
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| 29 | #define GETCWD _getcwd
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| 30 | #define CHMOD(a, b) 0
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| 31 | #define MAXPATHLEN 1024
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| 32 | #if !defined(PATH_MAX)
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| 33 | #define PATH_MAX _MAX_PATH
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| 34 | #endif
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| 35 | #define realpath(N,R) _fullpath((R),(N),_MAX_PATH)
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| 36 | #include <direct.h>
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| 37 | #else
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| 38 | #define NULL_FILE "/dev/null"
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| 39 | #include <unistd.h>
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| 40 | #define UNLINK unlink
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| 41 | #define GETCWD getcwd
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| 42 | #define CHMOD(a, b) chmod(a,b)
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| 43 | #include <sys/file.h>
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| 44 | #include <libgen.h>
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| 45 | #include <sys/param.h>
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| 46 | #include <pwd.h>
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| 47 | #endif
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| 48 | #if defined(__NEWLIB__)
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| 49 | #define _MAX_DIR 253
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| 50 | #define _MAX_DRIVE 2
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| 51 | #define PATH_MAX (_MAX_DRIVE + _MAX_DIR)
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| 52 | #define MAXPATHLEN (_MAX_DRIVE + _MAX_DIR)
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| 53 | #endif
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| 54 |
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| 55 | #define FILE_SEPARATOR "/"
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| 56 |
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| 57 | #if defined(_WIN32) || defined(_WIN64)
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| 58 | #define PATH_SEPARATOR ";"
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| 59 | #define FILE_ALT_SEPARATOR "\\"
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| 60 | #else
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| 61 | #define PATH_SEPARATOR ":"
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| 62 | #endif
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| 63 |
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| 64 | #ifndef LOCK_SH
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| 65 | #define LOCK_SH 1
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| 66 | #endif
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| 67 | #ifndef LOCK_EX
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| 68 | #define LOCK_EX 2
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| 69 | #endif
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| 70 | #ifndef LOCK_NB
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| 71 | #define LOCK_NB 4
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| 72 | #endif
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| 73 | #ifndef LOCK_UN
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| 74 | #define LOCK_UN 8
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| 75 | #endif
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| 76 |
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| 77 | #define STAT(p, s) stat(p, s)
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| 78 |
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| 79 |
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| 80 | mrb_value
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| 81 | mrb_file_s_umask(mrb_state *mrb, mrb_value klass)
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| 82 | {
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| 83 | #if defined(_WIN32) || defined(_WIN64) || defined(__NEWLIB__)
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| 84 | /* nothing to do on windows */
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| 85 | return mrb_fixnum_value(0);
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| 86 |
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| 87 | #else
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| 88 | mrb_int mask, omask;
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| 89 | if (mrb_get_args(mrb, "|i", &mask) == 0) {
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| 90 | omask = umask(0);
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| 91 | umask(omask);
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| 92 | } else {
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| 93 | omask = umask(mask);
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| 94 | }
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| 95 | return mrb_fixnum_value(omask);
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| 96 | #endif
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| 97 | }
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| 98 |
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| 99 | static mrb_value
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| 100 | mrb_file_s_unlink(mrb_state *mrb, mrb_value obj)
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| 101 | {
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| 102 | mrb_value *argv;
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| 103 | mrb_value pathv;
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| 104 | mrb_int argc, i;
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| 105 | const char *path;
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| 106 |
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| 107 | mrb_get_args(mrb, "*", &argv, &argc);
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| 108 | for (i = 0; i < argc; i++) {
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| 109 | pathv = mrb_convert_type(mrb, argv[i], MRB_TT_STRING, "String", "to_str");
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| 110 | path = mrb_string_value_cstr(mrb, &pathv);
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| 111 | if (UNLINK(path) < 0) {
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| 112 | mrb_sys_fail(mrb, path);
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| 113 | }
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| 114 | }
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| 115 | return mrb_fixnum_value(argc);
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| 116 | }
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| 117 |
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| 118 | static mrb_value
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| 119 | mrb_file_s_rename(mrb_state *mrb, mrb_value obj)
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| 120 | {
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| 121 | mrb_value from, to;
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| 122 | const char *src, *dst;
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| 123 |
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| 124 | mrb_get_args(mrb, "SS", &from, &to);
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| 125 | src = mrb_string_value_cstr(mrb, &from);
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| 126 | dst = mrb_string_value_cstr(mrb, &to);
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| 127 | if (rename(src, dst) < 0) {
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| 128 | if (CHMOD(dst, 0666) == 0 && UNLINK(dst) == 0 && rename(src, dst) == 0) {
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| 129 | return mrb_fixnum_value(0);
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| 130 | }
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| 131 | mrb_sys_fail(mrb, mrb_str_to_cstr(mrb, mrb_format(mrb, "(%S, %S)", from, to)));
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| 132 | }
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| 133 | return mrb_fixnum_value(0);
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| 134 | }
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| 135 |
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| 136 | static mrb_value
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| 137 | mrb_file_dirname(mrb_state *mrb, mrb_value klass)
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| 138 | {
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| 139 | #if defined(_WIN32) || defined(_WIN64)
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| 140 | char dname[_MAX_DIR], vname[_MAX_DRIVE];
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| 141 | char buffer[_MAX_DRIVE + _MAX_DIR];
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| 142 | char *path;
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| 143 | size_t ridx;
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| 144 | mrb_value s;
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| 145 | mrb_get_args(mrb, "S", &s);
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| 146 | path = mrb_str_to_cstr(mrb, s);
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| 147 | _splitpath((const char*)path, vname, dname, NULL, NULL);
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| 148 | snprintf(buffer, _MAX_DRIVE + _MAX_DIR, "%s%s", vname, dname);
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| 149 | ridx = strlen(buffer);
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| 150 | if (ridx == 0) {
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| 151 | strncpy(buffer, ".", 2); /* null terminated */
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| 152 | } else if (ridx > 1) {
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| 153 | ridx--;
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| 154 | while (ridx > 0 && (buffer[ridx] == '/' || buffer[ridx] == '\\')) {
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| 155 | buffer[ridx] = '\0'; /* remove last char */
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| 156 | ridx--;
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| 157 | }
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| 158 | }
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| 159 | return mrb_str_new_cstr(mrb, buffer);
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| 160 | #else
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| 161 | char *dname, *path;
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| 162 | mrb_value s;
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| 163 | mrb_get_args(mrb, "S", &s);
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| 164 | path = mrb_str_to_cstr(mrb, s);
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| 165 |
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| 166 | if ((dname = dirname(path)) == NULL) {
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| 167 | mrb_sys_fail(mrb, "dirname");
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| 168 | }
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| 169 | #endif
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| 170 | return mrb_str_new_cstr(mrb, dname);
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| 171 | }
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| 172 |
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| 173 | static mrb_value
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| 174 | mrb_file_basename(mrb_state *mrb, mrb_value klass)
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| 175 | {
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| 176 | #if defined(_WIN32) || defined(_WIN64)
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| 177 | char bname[_MAX_DIR];
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| 178 | char extname[_MAX_EXT];
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| 179 | char *path;
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| 180 | size_t ridx;
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| 181 | char buffer[_MAX_DIR + _MAX_EXT];
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| 182 | mrb_value s;
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| 183 | mrb_get_args(mrb, "S", &s);
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| 184 | path = mrb_str_to_cstr(mrb, s);
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| 185 | ridx = strlen(path);
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| 186 | if (ridx > 0) {
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| 187 | ridx--;
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| 188 | while (ridx > 0 && (path[ridx] == '/' || path[ridx] == '\\')) {
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| 189 | path[ridx] = '\0';
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| 190 | ridx--;
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| 191 | }
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| 192 | if (strncmp(path, "/", 2) == 0) {
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| 193 | return mrb_str_new_cstr(mrb, path);
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| 194 | }
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| 195 | }
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| 196 | _splitpath((const char*)path, NULL, NULL, bname, extname);
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| 197 | snprintf(buffer, _MAX_DIR + _MAX_EXT, "%s%s", bname, extname);
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| 198 | return mrb_str_new_cstr(mrb, buffer);
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| 199 | #else
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| 200 | char *bname, *path;
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| 201 | mrb_value s;
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| 202 | mrb_get_args(mrb, "S", &s);
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| 203 | path = mrb_str_to_cstr(mrb, s);
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| 204 | if ((bname = basename(path)) == NULL) {
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| 205 | mrb_sys_fail(mrb, "basename");
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| 206 | }
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| 207 | return mrb_str_new_cstr(mrb, bname);
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| 208 | #endif
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| 209 | }
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| 210 |
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| 211 | static mrb_value
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| 212 | mrb_file_realpath(mrb_state *mrb, mrb_value klass)
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| 213 | {
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| 214 | mrb_value pathname, dir_string, s, result;
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| 215 | int argc;
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| 216 | char *cpath;
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| 217 |
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| 218 | argc = mrb_get_args(mrb, "S|S", &pathname, &dir_string);
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| 219 | if (argc == 2) {
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| 220 | s = mrb_str_dup(mrb, dir_string);
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| 221 | s = mrb_str_append(mrb, s, mrb_str_new_cstr(mrb, FILE_SEPARATOR));
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| 222 | s = mrb_str_append(mrb, s, pathname);
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| 223 | pathname = s;
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| 224 | }
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| 225 | cpath = mrb_str_to_cstr(mrb, pathname);
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| 226 | result = mrb_str_buf_new(mrb, PATH_MAX);
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| 227 | if (realpath(cpath, RSTRING_PTR(result)) == NULL)
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| 228 | mrb_sys_fail(mrb, cpath);
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| 229 | mrb_str_resize(mrb, result, strlen(RSTRING_PTR(result)));
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| 230 | return result;
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| 231 | }
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| 232 |
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| 233 | mrb_value
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| 234 | mrb_file__getwd(mrb_state *mrb, mrb_value klass)
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| 235 | {
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| 236 | mrb_value path;
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| 237 |
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| 238 | path = mrb_str_buf_new(mrb, MAXPATHLEN);
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| 239 | if (GETCWD(RSTRING_PTR(path), MAXPATHLEN) == NULL) {
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| 240 | mrb_sys_fail(mrb, "getcwd(2)");
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| 241 | }
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| 242 | mrb_str_resize(mrb, path, strlen(RSTRING_PTR(path)));
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| 243 | return path;
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| 244 | }
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| 245 |
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| 246 | static int
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| 247 | mrb_file_is_absolute_path(const char *path)
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| 248 | {
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| 249 | return (path[0] == '/');
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| 250 | }
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| 251 |
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| 252 | static mrb_value
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| 253 | mrb_file__gethome(mrb_state *mrb, mrb_value klass)
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| 254 | {
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| 255 | #if !defined(_WIN32) && !defined(_WIN64) && !defined(__NEWLIB__)
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| 256 | mrb_value username;
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| 257 | int argc;
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| 258 | char *home;
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| 259 |
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| 260 | argc = mrb_get_args(mrb, "|S", &username);
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| 261 | if (argc == 0) {
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| 262 | home = getenv("HOME");
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| 263 | if (home == NULL) {
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| 264 | return mrb_nil_value();
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| 265 | }
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| 266 | if (!mrb_file_is_absolute_path(home)) {
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| 267 | mrb_raise(mrb, E_ARGUMENT_ERROR, "non-absolute home");
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| 268 | }
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| 269 | } else {
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| 270 | const char *cuser = mrb_str_to_cstr(mrb, username);
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| 271 | struct passwd *pwd = getpwnam(cuser);
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| 272 | if (pwd == NULL) {
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| 273 | return mrb_nil_value();
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| 274 | }
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| 275 | home = pwd->pw_dir;
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| 276 | if (!mrb_file_is_absolute_path(home)) {
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| 277 | mrb_raisef(mrb, E_ARGUMENT_ERROR, "non-absolute home of ~%S", username);
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| 278 | }
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| 279 | }
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| 280 | return mrb_str_new_cstr(mrb, home);
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| 281 | #else
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| 282 |
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| 283 | return mrb_nil_value();
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| 284 | #endif
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| 285 | }
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| 286 |
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| 287 | mrb_value
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| 288 | mrb_file_flock(mrb_state *mrb, mrb_value self)
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| 289 | {
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| 290 | #if defined(_WIN32) || defined(_WIN64) || defined(sun) || defined(__NEWLIB__)
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| 291 | mrb_raise(mrb, E_NOTIMP_ERROR, "flock is not supported on Illumos/Solaris/Windows");
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| 292 | #else
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| 293 | mrb_int operation;
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| 294 | int fd;
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| 295 |
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| 296 | mrb_get_args(mrb, "i", &operation);
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| 297 | fd = mrb_fixnum(mrb_io_fileno(mrb, self));
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| 298 |
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| 299 | while (flock(fd, operation) == -1) {
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| 300 | switch (errno) {
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| 301 | case EINTR:
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| 302 | /* retry */
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| 303 | break;
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| 304 | case EAGAIN: /* NetBSD */
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| 305 | #if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN
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| 306 | case EWOULDBLOCK: /* FreeBSD OpenBSD Linux */
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| 307 | #endif
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| 308 | if (operation & LOCK_NB) {
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| 309 | return mrb_false_value();
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| 310 | }
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| 311 | /* FALLTHRU - should not happen */
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| 312 | default:
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| 313 | mrb_sys_fail(mrb, "flock failed");
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| 314 | break;
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| 315 | }
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| 316 | }
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| 317 | #endif
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| 318 | return mrb_fixnum_value(0);
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| 319 | }
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| 320 |
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| 321 | static mrb_value
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| 322 | mrb_file_s_symlink(mrb_state *mrb, mrb_value klass)
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| 323 | {
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| 324 | #if defined(_WIN32) || defined(_WIN64) || defined(__NEWLIB__)
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| 325 | mrb_raise(mrb, E_NOTIMP_ERROR, "symlink is not supported on this platform");
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| 326 | #else
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| 327 | mrb_value from, to;
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| 328 | const char *src, *dst;
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| 329 | int ai = mrb_gc_arena_save(mrb);
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| 330 |
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| 331 | mrb_get_args(mrb, "SS", &from, &to);
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| 332 | src = mrb_str_to_cstr(mrb, from);
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| 333 | dst = mrb_str_to_cstr(mrb, to);
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| 334 |
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| 335 | if (symlink(src, dst) == -1) {
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| 336 | mrb_sys_fail(mrb, mrb_str_to_cstr(mrb, mrb_format(mrb, "(%S, %S)", from, to)));
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| 337 | }
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| 338 | mrb_gc_arena_restore(mrb, ai);
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| 339 | #endif
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| 340 | return mrb_fixnum_value(0);
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| 341 | }
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| 342 |
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| 343 | static mrb_value
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| 344 | mrb_file_s_chmod(mrb_state *mrb, mrb_value klass) {
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| 345 | mrb_int mode;
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| 346 | mrb_int argc, i;
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| 347 | mrb_value *filenames;
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| 348 | int ai = mrb_gc_arena_save(mrb);
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| 349 |
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| 350 | mrb_get_args(mrb, "i*", &mode, &filenames, &argc);
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| 351 | for (i = 0; i < argc; i++) {
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| 352 | char *path = mrb_str_to_cstr(mrb, filenames[i]);
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| 353 | if (CHMOD(path, mode) == -1) {
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| 354 | mrb_sys_fail(mrb, path);
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| 355 | }
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| 356 | }
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| 357 |
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| 358 | mrb_gc_arena_restore(mrb, ai);
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| 359 | return mrb_fixnum_value(argc);
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| 360 | }
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| 361 |
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| 362 | static mrb_value
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| 363 | mrb_file_s_readlink(mrb_state *mrb, mrb_value klass) {
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| 364 | #if defined(_WIN32) || defined(_WIN64) || defined(__NEWLIB__)
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| 365 | mrb_raise(mrb, E_NOTIMP_ERROR, "readlink is not supported on this platform");
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| 366 | return mrb_nil_value(); // unreachable
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| 367 | #else
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| 368 | char *path, *buf;
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| 369 | size_t bufsize = 100;
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| 370 | ssize_t rc;
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| 371 | mrb_value ret;
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| 372 | int ai = mrb_gc_arena_save(mrb);
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| 373 |
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| 374 | mrb_get_args(mrb, "z", &path);
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| 375 |
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| 376 | buf = (char *)mrb_malloc(mrb, bufsize);
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| 377 | while ((rc = readlink(path, buf, bufsize)) == bufsize && rc != -1) {
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| 378 | bufsize *= 2;
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| 379 | buf = (char *)mrb_realloc(mrb, buf, bufsize);
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| 380 | }
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| 381 | if (rc == -1) {
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| 382 | mrb_free(mrb, buf);
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| 383 | mrb_sys_fail(mrb, path);
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| 384 | }
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| 385 | ret = mrb_str_new(mrb, buf, rc);
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| 386 | mrb_free(mrb, buf);
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| 387 |
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| 388 | mrb_gc_arena_restore(mrb, ai);
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| 389 | return ret;
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| 390 | #endif
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| 391 | }
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| 392 |
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| 393 | void
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| 394 | mrb_init_file(mrb_state *mrb)
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| 395 | {
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| 396 | struct RClass *io, *file, *cnst;
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| 397 |
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| 398 | io = mrb_class_get(mrb, "IO");
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| 399 | file = mrb_define_class(mrb, "File", io);
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| 400 | MRB_SET_INSTANCE_TT(file, MRB_TT_DATA);
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| 401 | mrb_define_class_method(mrb, file, "umask", mrb_file_s_umask, MRB_ARGS_REQ(1));
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| 402 | mrb_define_class_method(mrb, file, "delete", mrb_file_s_unlink, MRB_ARGS_ANY());
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| 403 | mrb_define_class_method(mrb, file, "unlink", mrb_file_s_unlink, MRB_ARGS_ANY());
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| 404 | mrb_define_class_method(mrb, file, "rename", mrb_file_s_rename, MRB_ARGS_REQ(2));
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| 405 | mrb_define_class_method(mrb, file, "symlink", mrb_file_s_symlink, MRB_ARGS_REQ(2));
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| 406 | mrb_define_class_method(mrb, file, "chmod", mrb_file_s_chmod, MRB_ARGS_REQ(1) | MRB_ARGS_REST());
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| 407 | mrb_define_class_method(mrb, file, "readlink", mrb_file_s_readlink, MRB_ARGS_REQ(1));
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| 408 |
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| 409 | mrb_define_class_method(mrb, file, "dirname", mrb_file_dirname, MRB_ARGS_REQ(1));
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| 410 | mrb_define_class_method(mrb, file, "basename", mrb_file_basename, MRB_ARGS_REQ(1));
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| 411 | mrb_define_class_method(mrb, file, "realpath", mrb_file_realpath, MRB_ARGS_REQ(1)|MRB_ARGS_OPT(1));
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| 412 | mrb_define_class_method(mrb, file, "_getwd", mrb_file__getwd, MRB_ARGS_NONE());
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| 413 | mrb_define_class_method(mrb, file, "_gethome", mrb_file__gethome, MRB_ARGS_OPT(1));
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| 414 |
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| 415 | mrb_define_method(mrb, file, "flock", mrb_file_flock, MRB_ARGS_REQ(1));
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| 416 |
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| 417 | cnst = mrb_define_module_under(mrb, file, "Constants");
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| 418 | mrb_define_const(mrb, cnst, "LOCK_SH", mrb_fixnum_value(LOCK_SH));
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| 419 | mrb_define_const(mrb, cnst, "LOCK_EX", mrb_fixnum_value(LOCK_EX));
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| 420 | mrb_define_const(mrb, cnst, "LOCK_UN", mrb_fixnum_value(LOCK_UN));
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| 421 | mrb_define_const(mrb, cnst, "LOCK_NB", mrb_fixnum_value(LOCK_NB));
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| 422 | mrb_define_const(mrb, cnst, "SEPARATOR", mrb_str_new_cstr(mrb, FILE_SEPARATOR));
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| 423 | mrb_define_const(mrb, cnst, "PATH_SEPARATOR", mrb_str_new_cstr(mrb, PATH_SEPARATOR));
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| 424 | #if defined(_WIN32) || defined(_WIN64)
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| 425 | mrb_define_const(mrb, cnst, "ALT_SEPARATOR", mrb_str_new_cstr(mrb, FILE_ALT_SEPARATOR));
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| 426 | #else
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| 427 | mrb_define_const(mrb, cnst, "ALT_SEPARATOR", mrb_nil_value());
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| 428 | #endif
|
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| 429 | mrb_define_const(mrb, cnst, "NULL", mrb_str_new_cstr(mrb, NULL_FILE));
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| 430 |
|
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| 431 | }
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