blob: 93dcaf549a907c594a079ba6a1901455b8a982ef [file] [log] [blame]
Adam Lesinski16c4d152014-01-24 13:27:13 -08001/*
2 * Copyright (C) 2005 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "misc"
18
19//
20// Miscellaneous utility functions.
21//
22#include <androidfw/misc.h>
23
Yurii Zubrytskyi2ab44472022-11-30 00:56:22 -080024#include "android-base/logging.h"
Adam Lesinski16c4d152014-01-24 13:27:13 -080025
Yurii Zubrytskyi98e12d02022-12-01 09:34:02 -080026#ifdef __linux__
Yurii Zubrytskyi2ab44472022-11-30 00:56:22 -080027#include <sys/statvfs.h>
28#include <sys/vfs.h>
Yurii Zubrytskyi98e12d02022-12-01 09:34:02 -080029#endif // __linux__
Yurii Zubrytskyi2ab44472022-11-30 00:56:22 -080030
31#include <cstring>
32#include <cstdio>
33#include <errno.h>
34#include <sys/stat.h>
Adam Lesinski16c4d152014-01-24 13:27:13 -080035
36namespace android {
37
38/*
39 * Get a file's type.
40 */
41FileType getFileType(const char* fileName)
42{
43 struct stat sb;
44
45 if (stat(fileName, &sb) < 0) {
46 if (errno == ENOENT || errno == ENOTDIR)
47 return kFileTypeNonexistent;
48 else {
Yurii Zubrytskyi2ab44472022-11-30 00:56:22 -080049 PLOG(ERROR) << "getFileType(): stat(" << fileName << ") failed";
Adam Lesinski16c4d152014-01-24 13:27:13 -080050 return kFileTypeUnknown;
51 }
52 } else {
53 if (S_ISREG(sb.st_mode))
54 return kFileTypeRegular;
55 else if (S_ISDIR(sb.st_mode))
56 return kFileTypeDirectory;
57 else if (S_ISCHR(sb.st_mode))
58 return kFileTypeCharDev;
59 else if (S_ISBLK(sb.st_mode))
60 return kFileTypeBlockDev;
61 else if (S_ISFIFO(sb.st_mode))
62 return kFileTypeFifo;
Elliott Hughes1bf24812015-01-12 14:33:04 -080063#if defined(S_ISLNK)
Adam Lesinski16c4d152014-01-24 13:27:13 -080064 else if (S_ISLNK(sb.st_mode))
65 return kFileTypeSymlink;
Elliott Hughes1bf24812015-01-12 14:33:04 -080066#endif
67#if defined(S_ISSOCK)
Adam Lesinski16c4d152014-01-24 13:27:13 -080068 else if (S_ISSOCK(sb.st_mode))
69 return kFileTypeSocket;
70#endif
71 else
72 return kFileTypeUnknown;
73 }
74}
75
76/*
77 * Get a file's modification date.
78 */
Yurii Zubrytskyie7c1f002024-01-30 13:50:57 -080079time_t getFileModDate(const char* fileName) {
Adam Lesinski16c4d152014-01-24 13:27:13 -080080 struct stat sb;
Yurii Zubrytskyie7c1f002024-01-30 13:50:57 -080081 if (stat(fileName, &sb) < 0) {
82 return (time_t)-1;
83 }
84 return sb.st_mtime;
85}
Adam Lesinski16c4d152014-01-24 13:27:13 -080086
Yurii Zubrytskyie7c1f002024-01-30 13:50:57 -080087time_t getFileModDate(int fd) {
88 struct stat sb;
89 if (fstat(fd, &sb) < 0) {
90 return (time_t)-1;
91 }
92 if (sb.st_nlink <= 0) {
93 errno = ENOENT;
94 return (time_t)-1;
95 }
Adam Lesinski16c4d152014-01-24 13:27:13 -080096 return sb.st_mtime;
97}
98
Yurii Zubrytskyi98e12d02022-12-01 09:34:02 -080099#ifndef __linux__
100// No need to implement these on the host, the functions only matter on a device.
Yurii Zubrytskyi2ab44472022-11-30 00:56:22 -0800101bool isReadonlyFilesystem(const char*) {
102 return false;
103}
104bool isReadonlyFilesystem(int) {
105 return false;
106}
Yurii Zubrytskyi98e12d02022-12-01 09:34:02 -0800107#else // __linux__
Yurii Zubrytskyi2ab44472022-11-30 00:56:22 -0800108bool isReadonlyFilesystem(const char* path) {
109 struct statfs sfs;
110 if (::statfs(path, &sfs)) {
111 PLOG(ERROR) << "isReadonlyFilesystem(): statfs(" << path << ") failed";
112 return false;
113 }
114 return (sfs.f_flags & ST_RDONLY) != 0;
115}
116
117bool isReadonlyFilesystem(int fd) {
118 struct statfs sfs;
119 if (::fstatfs(fd, &sfs)) {
120 PLOG(ERROR) << "isReadonlyFilesystem(): fstatfs(" << fd << ") failed";
121 return false;
122 }
123 return (sfs.f_flags & ST_RDONLY) != 0;
124}
Yurii Zubrytskyi98e12d02022-12-01 09:34:02 -0800125#endif // __linux__
Yurii Zubrytskyi2ab44472022-11-30 00:56:22 -0800126
Adam Lesinski16c4d152014-01-24 13:27:13 -0800127}; // namespace android