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Rev | Author | Line No. | Line |
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2671 | jermar | 1 | /* |
2684 | jermar | 2 | * Copyright (c) 2008 Jakub Jermar |
2671 | jermar | 3 | * All rights reserved. |
4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | /** @addtogroup libc |
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30 | * @{ |
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31 | */ |
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32 | /** @file |
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33 | */ |
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34 | |||
2755 | jermar | 35 | #include <vfs/vfs.h> |
36 | #include <vfs/canonify.h> |
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2694 | jermar | 37 | #include <stdlib.h> |
2674 | jermar | 38 | #include <unistd.h> |
2694 | jermar | 39 | #include <dirent.h> |
2674 | jermar | 40 | #include <fcntl.h> |
2707 | jermar | 41 | #include <sys/stat.h> |
2771 | jermar | 42 | #include <stdio.h> |
2707 | jermar | 43 | #include <sys/types.h> |
2671 | jermar | 44 | #include <ipc/ipc.h> |
45 | #include <ipc/services.h> |
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46 | #include <async.h> |
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47 | #include <atomic.h> |
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48 | #include <futex.h> |
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49 | #include <errno.h> |
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50 | #include <string.h> |
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3077 | decky | 51 | #include <ipc/devmap.h> |
2671 | jermar | 52 | #include "../../srv/vfs/vfs.h" |
53 | |||
54 | int vfs_phone = -1; |
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2755 | jermar | 55 | futex_t vfs_phone_futex = FUTEX_INITIALIZER; |
2671 | jermar | 56 | |
2755 | jermar | 57 | futex_t cwd_futex = FUTEX_INITIALIZER; |
58 | DIR *cwd_dir = NULL; |
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59 | char *cwd_path = NULL; |
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60 | size_t cwd_len = 0; |
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61 | |||
3305 | jermar | 62 | char *absolutize(const char *path, size_t *retlen) |
2755 | jermar | 63 | { |
64 | char *ncwd_path; |
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3291 | jermar | 65 | char *ncwd_path_nc; |
2755 | jermar | 66 | |
67 | futex_down(&cwd_futex); |
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68 | size_t len = strlen(path); |
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69 | if (*path != '/') { |
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70 | if (!cwd_path) { |
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71 | futex_up(&cwd_futex); |
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72 | return NULL; |
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73 | } |
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3291 | jermar | 74 | ncwd_path_nc = malloc(len + cwd_len + 1); |
75 | if (!ncwd_path_nc) { |
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2755 | jermar | 76 | futex_up(&cwd_futex); |
77 | return NULL; |
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78 | } |
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3291 | jermar | 79 | strcpy(ncwd_path_nc, cwd_path); |
80 | ncwd_path_nc[cwd_len] = '/'; |
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81 | ncwd_path_nc[cwd_len + 1] = '\0'; |
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2755 | jermar | 82 | } else { |
3291 | jermar | 83 | ncwd_path_nc = malloc(len + 1); |
84 | if (!ncwd_path_nc) { |
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2755 | jermar | 85 | futex_up(&cwd_futex); |
86 | return NULL; |
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87 | } |
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3291 | jermar | 88 | ncwd_path_nc[0] = '\0'; |
2755 | jermar | 89 | } |
3291 | jermar | 90 | strcat(ncwd_path_nc, path); |
91 | ncwd_path = canonify(ncwd_path_nc, retlen); |
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92 | if (!ncwd_path) { |
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2771 | jermar | 93 | futex_up(&cwd_futex); |
3291 | jermar | 94 | free(ncwd_path_nc); |
2771 | jermar | 95 | return NULL; |
96 | } |
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3291 | jermar | 97 | /* |
98 | * We need to clone ncwd_path because canonify() works in-place and thus |
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99 | * the address in ncwd_path need not be the same as ncwd_path_nc, even |
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100 | * though they both point into the same dynamically allocated buffer. |
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101 | */ |
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102 | ncwd_path = strdup(ncwd_path); |
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103 | free(ncwd_path_nc); |
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104 | if (!ncwd_path) { |
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105 | futex_up(&cwd_futex); |
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106 | return NULL; |
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107 | } |
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2755 | jermar | 108 | futex_up(&cwd_futex); |
109 | return ncwd_path; |
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110 | } |
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111 | |||
2671 | jermar | 112 | static int vfs_connect(void) |
113 | { |
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114 | if (vfs_phone < 0) |
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115 | vfs_phone = ipc_connect_me_to(PHONE_NS, SERVICE_VFS, 0, 0); |
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116 | return vfs_phone; |
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117 | } |
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118 | |||
3077 | decky | 119 | static int device_get_handle(char *name, dev_handle_t *handle) |
120 | { |
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121 | int phone = ipc_connect_me_to(PHONE_NS, SERVICE_DEVMAP, DEVMAP_CLIENT, 0); |
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122 | if (phone < 0) |
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123 | return phone; |
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124 | |||
125 | ipc_call_t answer; |
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126 | aid_t req = async_send_2(phone, DEVMAP_DEVICE_GET_HANDLE, 0, 0, |
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127 | &answer); |
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128 | |||
129 | ipcarg_t retval = ipc_data_write_start(phone, name, strlen(name) + 1); |
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130 | |||
131 | if (retval != EOK) { |
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132 | async_wait_for(req, NULL); |
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133 | ipc_hangup(phone); |
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134 | return retval; |
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135 | } |
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136 | |||
137 | async_wait_for(req, &retval); |
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138 | |||
139 | if (handle != NULL) |
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140 | *handle = -1; |
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141 | |||
142 | if (retval == EOK) { |
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143 | if (handle != NULL) |
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144 | *handle = (dev_handle_t) IPC_GET_ARG1(answer); |
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145 | } |
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146 | |||
147 | ipc_hangup(phone); |
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148 | return retval; |
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149 | } |
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150 | |||
2671 | jermar | 151 | int mount(const char *fs_name, const char *mp, const char *dev) |
152 | { |
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153 | int res; |
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154 | ipcarg_t rc; |
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155 | aid_t req; |
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3077 | decky | 156 | dev_handle_t dev_handle; |
157 | |||
158 | res = device_get_handle(dev, &dev_handle); |
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159 | if (res != EOK) |
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160 | return res; |
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161 | |||
2771 | jermar | 162 | size_t mpa_len; |
163 | char *mpa = absolutize(mp, &mpa_len); |
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2755 | jermar | 164 | if (!mpa) |
165 | return ENOMEM; |
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166 | |||
2671 | jermar | 167 | futex_down(&vfs_phone_futex); |
168 | async_serialize_start(); |
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169 | if (vfs_phone < 0) { |
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170 | res = vfs_connect(); |
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171 | if (res < 0) { |
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172 | async_serialize_end(); |
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173 | futex_up(&vfs_phone_futex); |
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2755 | jermar | 174 | free(mpa); |
2671 | jermar | 175 | return res; |
176 | } |
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177 | } |
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178 | req = async_send_1(vfs_phone, VFS_MOUNT, dev_handle, NULL); |
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2678 | jermar | 179 | rc = ipc_data_write_start(vfs_phone, (void *)fs_name, strlen(fs_name)); |
2671 | jermar | 180 | if (rc != EOK) { |
181 | async_wait_for(req, NULL); |
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182 | async_serialize_end(); |
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183 | futex_up(&vfs_phone_futex); |
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2755 | jermar | 184 | free(mpa); |
2671 | jermar | 185 | return (int) rc; |
186 | } |
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2771 | jermar | 187 | rc = ipc_data_write_start(vfs_phone, (void *)mpa, mpa_len); |
2671 | jermar | 188 | if (rc != EOK) { |
189 | async_wait_for(req, NULL); |
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190 | async_serialize_end(); |
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191 | futex_up(&vfs_phone_futex); |
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2755 | jermar | 192 | free(mpa); |
2671 | jermar | 193 | return (int) rc; |
194 | } |
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195 | async_wait_for(req, &rc); |
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196 | async_serialize_end(); |
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197 | futex_up(&vfs_phone_futex); |
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2755 | jermar | 198 | free(mpa); |
2671 | jermar | 199 | return (int) rc; |
200 | } |
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201 | |||
2700 | jermar | 202 | static int _open(const char *path, int lflag, int oflag, ...) |
2671 | jermar | 203 | { |
204 | int res; |
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205 | ipcarg_t rc; |
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206 | ipc_call_t answer; |
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207 | aid_t req; |
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208 | |||
2771 | jermar | 209 | size_t pa_len; |
210 | char *pa = absolutize(path, &pa_len); |
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2755 | jermar | 211 | if (!pa) |
212 | return ENOMEM; |
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213 | |||
2671 | jermar | 214 | futex_down(&vfs_phone_futex); |
215 | async_serialize_start(); |
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216 | if (vfs_phone < 0) { |
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217 | res = vfs_connect(); |
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218 | if (res < 0) { |
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219 | async_serialize_end(); |
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220 | futex_up(&vfs_phone_futex); |
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2755 | jermar | 221 | free(pa); |
2671 | jermar | 222 | return res; |
223 | } |
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224 | } |
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2700 | jermar | 225 | req = async_send_3(vfs_phone, VFS_OPEN, lflag, oflag, 0, &answer); |
2771 | jermar | 226 | rc = ipc_data_write_start(vfs_phone, pa, pa_len); |
2671 | jermar | 227 | if (rc != EOK) { |
228 | async_wait_for(req, NULL); |
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229 | async_serialize_end(); |
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230 | futex_up(&vfs_phone_futex); |
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2755 | jermar | 231 | free(pa); |
2671 | jermar | 232 | return (int) rc; |
233 | } |
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234 | async_wait_for(req, &rc); |
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235 | async_serialize_end(); |
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236 | futex_up(&vfs_phone_futex); |
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2755 | jermar | 237 | free(pa); |
3214 | svoboda | 238 | |
239 | if (rc != EOK) return (int) rc; |
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2671 | jermar | 240 | return (int) IPC_GET_ARG1(answer); |
241 | } |
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242 | |||
2700 | jermar | 243 | int open(const char *path, int oflag, ...) |
244 | { |
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245 | return _open(path, L_FILE, oflag); |
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246 | } |
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247 | |||
2707 | jermar | 248 | int close(int fildes) |
249 | { |
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2734 | jermar | 250 | int res; |
251 | ipcarg_t rc; |
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252 | |||
253 | futex_down(&vfs_phone_futex); |
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254 | async_serialize_start(); |
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255 | if (vfs_phone < 0) { |
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256 | res = vfs_connect(); |
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257 | if (res < 0) { |
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258 | async_serialize_end(); |
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259 | futex_up(&vfs_phone_futex); |
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260 | return res; |
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261 | } |
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262 | } |
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263 | |||
264 | rc = async_req_1_0(vfs_phone, VFS_CLOSE, fildes); |
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265 | |||
266 | async_serialize_end(); |
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267 | futex_up(&vfs_phone_futex); |
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268 | |||
269 | return (int)rc; |
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2707 | jermar | 270 | } |
271 | |||
2671 | jermar | 272 | ssize_t read(int fildes, void *buf, size_t nbyte) |
273 | { |
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274 | int res; |
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275 | ipcarg_t rc; |
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276 | ipc_call_t answer; |
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277 | aid_t req; |
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278 | |||
279 | futex_down(&vfs_phone_futex); |
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280 | async_serialize_start(); |
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281 | if (vfs_phone < 0) { |
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282 | res = vfs_connect(); |
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283 | if (res < 0) { |
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284 | async_serialize_end(); |
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285 | futex_up(&vfs_phone_futex); |
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286 | return res; |
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287 | } |
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288 | } |
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2674 | jermar | 289 | req = async_send_1(vfs_phone, VFS_READ, fildes, &answer); |
2741 | jermar | 290 | rc = ipc_data_read_start(vfs_phone, (void *)buf, nbyte); |
291 | if (rc != EOK) { |
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2671 | jermar | 292 | async_wait_for(req, NULL); |
293 | async_serialize_end(); |
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294 | futex_up(&vfs_phone_futex); |
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295 | return (ssize_t) rc; |
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296 | } |
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297 | async_wait_for(req, &rc); |
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298 | async_serialize_end(); |
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299 | futex_up(&vfs_phone_futex); |
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2710 | jermar | 300 | if (rc == EOK) |
301 | return (ssize_t) IPC_GET_ARG1(answer); |
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302 | else |
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303 | return -1; |
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2671 | jermar | 304 | } |
305 | |||
2674 | jermar | 306 | ssize_t write(int fildes, const void *buf, size_t nbyte) |
307 | { |
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308 | int res; |
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309 | ipcarg_t rc; |
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310 | ipc_call_t answer; |
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311 | aid_t req; |
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312 | |||
313 | futex_down(&vfs_phone_futex); |
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314 | async_serialize_start(); |
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315 | if (vfs_phone < 0) { |
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316 | res = vfs_connect(); |
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317 | if (res < 0) { |
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318 | async_serialize_end(); |
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319 | futex_up(&vfs_phone_futex); |
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320 | return res; |
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321 | } |
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322 | } |
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323 | req = async_send_1(vfs_phone, VFS_WRITE, fildes, &answer); |
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2741 | jermar | 324 | rc = ipc_data_write_start(vfs_phone, (void *)buf, nbyte); |
325 | if (rc != EOK) { |
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2674 | jermar | 326 | async_wait_for(req, NULL); |
327 | async_serialize_end(); |
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328 | futex_up(&vfs_phone_futex); |
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329 | return (ssize_t) rc; |
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330 | } |
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331 | async_wait_for(req, &rc); |
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332 | async_serialize_end(); |
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333 | futex_up(&vfs_phone_futex); |
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2710 | jermar | 334 | if (rc == EOK) |
335 | return (ssize_t) IPC_GET_ARG1(answer); |
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336 | else |
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337 | return -1; |
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2674 | jermar | 338 | } |
2684 | jermar | 339 | |
340 | off_t lseek(int fildes, off_t offset, int whence) |
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341 | { |
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342 | int res; |
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343 | ipcarg_t rc; |
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344 | |||
345 | futex_down(&vfs_phone_futex); |
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346 | async_serialize_start(); |
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347 | if (vfs_phone < 0) { |
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348 | res = vfs_connect(); |
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349 | if (res < 0) { |
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350 | async_serialize_end(); |
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351 | futex_up(&vfs_phone_futex); |
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352 | return res; |
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353 | } |
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354 | } |
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355 | |||
356 | off_t newoffs; |
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357 | rc = async_req_3_1(vfs_phone, VFS_SEEK, fildes, offset, whence, |
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2707 | jermar | 358 | (ipcarg_t)&newoffs); |
2684 | jermar | 359 | |
360 | async_serialize_end(); |
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361 | futex_up(&vfs_phone_futex); |
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362 | |||
363 | if (rc != EOK) |
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364 | return (off_t) -1; |
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365 | |||
366 | return newoffs; |
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367 | } |
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368 | |||
2693 | jermar | 369 | int ftruncate(int fildes, off_t length) |
370 | { |
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371 | int res; |
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372 | ipcarg_t rc; |
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373 | |||
374 | futex_down(&vfs_phone_futex); |
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375 | async_serialize_start(); |
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376 | if (vfs_phone < 0) { |
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377 | res = vfs_connect(); |
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378 | if (res < 0) { |
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379 | async_serialize_end(); |
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380 | futex_up(&vfs_phone_futex); |
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381 | return res; |
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382 | } |
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383 | } |
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384 | rc = async_req_2_0(vfs_phone, VFS_TRUNCATE, fildes, length); |
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385 | async_serialize_end(); |
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386 | futex_up(&vfs_phone_futex); |
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387 | return (int) rc; |
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388 | } |
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389 | |||
2694 | jermar | 390 | DIR *opendir(const char *dirname) |
391 | { |
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392 | DIR *dirp = malloc(sizeof(DIR)); |
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393 | if (!dirp) |
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394 | return NULL; |
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2700 | jermar | 395 | dirp->fd = _open(dirname, L_DIRECTORY, 0); |
2699 | jermar | 396 | if (dirp->fd < 0) { |
2694 | jermar | 397 | free(dirp); |
398 | return NULL; |
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399 | } |
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400 | return dirp; |
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401 | } |
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402 | |||
403 | struct dirent *readdir(DIR *dirp) |
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404 | { |
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2699 | jermar | 405 | ssize_t len = read(dirp->fd, &dirp->res.d_name[0], NAME_MAX + 1); |
406 | if (len <= 0) |
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407 | return NULL; |
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408 | return &dirp->res; |
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2694 | jermar | 409 | } |
410 | |||
411 | void rewinddir(DIR *dirp) |
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412 | { |
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2699 | jermar | 413 | (void) lseek(dirp->fd, 0, SEEK_SET); |
2694 | jermar | 414 | } |
415 | |||
416 | int closedir(DIR *dirp) |
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417 | { |
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418 | (void) close(dirp->fd); |
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419 | free(dirp); |
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420 | return 0; |
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421 | } |
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422 | |||
2707 | jermar | 423 | int mkdir(const char *path, mode_t mode) |
2694 | jermar | 424 | { |
2707 | jermar | 425 | int res; |
426 | ipcarg_t rc; |
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427 | aid_t req; |
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428 | |||
2771 | jermar | 429 | size_t pa_len; |
430 | char *pa = absolutize(path, &pa_len); |
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2755 | jermar | 431 | if (!pa) |
432 | return ENOMEM; |
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433 | |||
2707 | jermar | 434 | futex_down(&vfs_phone_futex); |
435 | async_serialize_start(); |
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436 | if (vfs_phone < 0) { |
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437 | res = vfs_connect(); |
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438 | if (res < 0) { |
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439 | async_serialize_end(); |
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440 | futex_up(&vfs_phone_futex); |
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2755 | jermar | 441 | free(pa); |
2707 | jermar | 442 | return res; |
443 | } |
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444 | } |
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2735 | jermar | 445 | req = async_send_1(vfs_phone, VFS_MKDIR, mode, NULL); |
2771 | jermar | 446 | rc = ipc_data_write_start(vfs_phone, pa, pa_len); |
2707 | jermar | 447 | if (rc != EOK) { |
448 | async_wait_for(req, NULL); |
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449 | async_serialize_end(); |
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450 | futex_up(&vfs_phone_futex); |
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2755 | jermar | 451 | free(pa); |
2707 | jermar | 452 | return (int) rc; |
453 | } |
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454 | async_wait_for(req, &rc); |
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455 | async_serialize_end(); |
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456 | futex_up(&vfs_phone_futex); |
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2755 | jermar | 457 | free(pa); |
2761 | jermar | 458 | return rc; |
2694 | jermar | 459 | } |
460 | |||
2735 | jermar | 461 | static int _unlink(const char *path, int lflag) |
462 | { |
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463 | int res; |
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464 | ipcarg_t rc; |
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465 | aid_t req; |
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466 | |||
2771 | jermar | 467 | size_t pa_len; |
468 | char *pa = absolutize(path, &pa_len); |
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2755 | jermar | 469 | if (!pa) |
470 | return ENOMEM; |
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2771 | jermar | 471 | |
2735 | jermar | 472 | futex_down(&vfs_phone_futex); |
473 | async_serialize_start(); |
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474 | if (vfs_phone < 0) { |
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475 | res = vfs_connect(); |
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476 | if (res < 0) { |
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477 | async_serialize_end(); |
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478 | futex_up(&vfs_phone_futex); |
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2755 | jermar | 479 | free(pa); |
2735 | jermar | 480 | return res; |
481 | } |
||
482 | } |
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483 | req = async_send_0(vfs_phone, VFS_UNLINK, NULL); |
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2771 | jermar | 484 | rc = ipc_data_write_start(vfs_phone, pa, pa_len); |
2735 | jermar | 485 | if (rc != EOK) { |
486 | async_wait_for(req, NULL); |
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487 | async_serialize_end(); |
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488 | futex_up(&vfs_phone_futex); |
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2755 | jermar | 489 | free(pa); |
2735 | jermar | 490 | return (int) rc; |
491 | } |
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492 | async_wait_for(req, &rc); |
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493 | async_serialize_end(); |
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494 | futex_up(&vfs_phone_futex); |
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2755 | jermar | 495 | free(pa); |
2761 | jermar | 496 | return rc; |
2735 | jermar | 497 | } |
498 | |||
499 | int unlink(const char *path) |
||
500 | { |
||
501 | return _unlink(path, L_NONE); |
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502 | } |
||
503 | |||
504 | int rmdir(const char *path) |
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505 | { |
||
506 | return _unlink(path, L_DIRECTORY); |
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507 | } |
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508 | |||
2763 | jermar | 509 | int rename(const char *old, const char *new) |
510 | { |
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511 | int res; |
||
512 | ipcarg_t rc; |
||
513 | aid_t req; |
||
514 | |||
2771 | jermar | 515 | size_t olda_len; |
516 | char *olda = absolutize(old, &olda_len); |
||
2763 | jermar | 517 | if (!olda) |
518 | return ENOMEM; |
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2771 | jermar | 519 | |
520 | size_t newa_len; |
||
521 | char *newa = absolutize(new, &newa_len); |
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2763 | jermar | 522 | if (!newa) { |
523 | free(olda); |
||
524 | return ENOMEM; |
||
525 | } |
||
526 | |||
527 | futex_down(&vfs_phone_futex); |
||
528 | async_serialize_start(); |
||
529 | if (vfs_phone < 0) { |
||
530 | res = vfs_connect(); |
||
531 | if (res < 0) { |
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532 | async_serialize_end(); |
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533 | futex_up(&vfs_phone_futex); |
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534 | free(olda); |
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535 | free(newa); |
||
536 | return res; |
||
537 | } |
||
538 | } |
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539 | req = async_send_0(vfs_phone, VFS_RENAME, NULL); |
||
2771 | jermar | 540 | rc = ipc_data_write_start(vfs_phone, olda, olda_len); |
2763 | jermar | 541 | if (rc != EOK) { |
542 | async_wait_for(req, NULL); |
||
543 | async_serialize_end(); |
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544 | futex_up(&vfs_phone_futex); |
||
545 | free(olda); |
||
546 | free(newa); |
||
547 | return (int) rc; |
||
548 | } |
||
2771 | jermar | 549 | rc = ipc_data_write_start(vfs_phone, newa, newa_len); |
2763 | jermar | 550 | if (rc != EOK) { |
551 | async_wait_for(req, NULL); |
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552 | async_serialize_end(); |
||
553 | futex_up(&vfs_phone_futex); |
||
554 | free(olda); |
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555 | free(newa); |
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556 | return (int) rc; |
||
557 | } |
||
558 | async_wait_for(req, &rc); |
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559 | async_serialize_end(); |
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560 | futex_up(&vfs_phone_futex); |
||
561 | free(olda); |
||
562 | free(newa); |
||
563 | return rc; |
||
564 | } |
||
565 | |||
2755 | jermar | 566 | int chdir(const char *path) |
567 | { |
||
2771 | jermar | 568 | size_t pa_len; |
569 | char *pa = absolutize(path, &pa_len); |
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2755 | jermar | 570 | if (!pa) |
571 | return ENOMEM; |
||
572 | |||
2771 | jermar | 573 | DIR *d = opendir(pa); |
2755 | jermar | 574 | if (!d) { |
575 | free(pa); |
||
576 | return ENOENT; |
||
577 | } |
||
578 | |||
579 | futex_down(&cwd_futex); |
||
580 | if (cwd_dir) { |
||
581 | closedir(cwd_dir); |
||
582 | cwd_dir = NULL; |
||
583 | free(cwd_path); |
||
584 | cwd_path = NULL; |
||
585 | cwd_len = 0; |
||
586 | } |
||
587 | cwd_dir = d; |
||
2771 | jermar | 588 | cwd_path = pa; |
589 | cwd_len = pa_len; |
||
2755 | jermar | 590 | futex_up(&cwd_futex); |
591 | } |
||
592 | |||
593 | char *getcwd(char *buf, size_t size) |
||
594 | { |
||
595 | if (!size) |
||
596 | return NULL; |
||
597 | futex_down(&cwd_futex); |
||
598 | if (size < cwd_len + 1) { |
||
599 | futex_up(&cwd_futex); |
||
600 | return NULL; |
||
601 | } |
||
602 | strcpy(buf, cwd_path); |
||
603 | futex_up(&cwd_futex); |
||
604 | return buf; |
||
605 | } |
||
606 | |||
2671 | jermar | 607 | /** @} |
608 | */ |