| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #include <mntent.h> |
| #include <string.h> |
| |
| #include "bionic/pthread_internal.h" |
| |
| mntent* getmntent(FILE* fp) { |
| auto& tls = __get_bionic_tls(); |
| return getmntent_r(fp, &tls.mntent_buf, tls.mntent_strings, sizeof(tls.mntent_strings)); |
| } |
| |
| mntent* getmntent_r(FILE* fp, struct mntent* e, char* buf, int buf_len) { |
| memset(e, 0, sizeof(*e)); |
| while (fgets(buf, buf_len, fp) != NULL) { |
| // Entries look like "proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0". |
| // That is: mnt_fsname mnt_dir mnt_type mnt_opts 0 0. |
| int fsname0, fsname1, dir0, dir1, type0, type1, opts0, opts1; |
| if (sscanf(buf, " %n%*s%n %n%*s%n %n%*s%n %n%*s%n %d %d", |
| &fsname0, &fsname1, &dir0, &dir1, &type0, &type1, &opts0, &opts1, |
| &e->mnt_freq, &e->mnt_passno) == 2) { |
| e->mnt_fsname = &buf[fsname0]; |
| buf[fsname1] = '\0'; |
| |
| e->mnt_dir = &buf[dir0]; |
| buf[dir1] = '\0'; |
| |
| e->mnt_type = &buf[type0]; |
| buf[type1] = '\0'; |
| |
| e->mnt_opts = &buf[opts0]; |
| buf[opts1] = '\0'; |
| |
| return e; |
| } |
| } |
| return NULL; |
| } |
| |
| FILE* setmntent(const char* path, const char* mode) { |
| return fopen(path, mode); |
| } |
| |
| int endmntent(FILE* fp) { |
| if (fp != NULL) { |
| fclose(fp); |
| } |
| return 1; |
| } |
| |
| char* hasmntopt(const struct mntent* mnt, const char* opt) { |
| char* token = mnt->mnt_opts; |
| char* const end = mnt->mnt_opts + strlen(mnt->mnt_opts); |
| const size_t optLen = strlen(opt); |
| |
| while (token) { |
| char* const tokenEnd = token + optLen; |
| if (tokenEnd > end) break; |
| |
| if (memcmp(token, opt, optLen) == 0 && |
| (*tokenEnd == '\0' || *tokenEnd == ',' || *tokenEnd == '=')) { |
| return token; |
| } |
| |
| token = strchr(token, ','); |
| if (token) token++; |
| } |
| |
| return nullptr; |
| } |