51 lines
2.2 KiB
Markdown
51 lines
2.2 KiB
Markdown
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# Backup if change
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This script help you to backup a file when it is detected changed, this script will copy the file to `--target-dir` with datetime as suffix.
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## How it work
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Just re-calculate the file's hash every a few seconds, when different with last result, copy it.
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## Usage
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```
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$ ./backup-if-change.sh
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option(s) --file or --target-dir is unspecified.
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./backup-if-change.sh usage:
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--target-dir Directory to store the backup files
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--file The file to monitor
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--hash-tool Tools to calculate hash of file, default sha256sum
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--internel Seconds between checking file, default 32s
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$ /path/to/backup-if-change.sh --file user3.dat --target-dir backup_dir --internel
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2022-12-22T16:54:39,238228917+08:00 -- the hash now: c70f38d56b157a956249e43ad944bc990266b57ec0332d0596c30c73c3c19b01 user3.dat
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2022-12-22T16:54:39,239715425+08:00 -- backuping the file to user3.dat_2022-12-21T22:09:17+08:00
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2022-12-22T17:06:39,249323113+08:00 -- the hash now: ff2ab6b64f46c1ca2d7002c3c0f0818707ad2a920b36dba6f009728fdd12f7a4 user3.dat
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2022-12-22T17:06:39,251145398+08:00 -- backuping the file to user3.dat_2022-12-22T17:04:32+08:00
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^C
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```
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## License
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```
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MIT License
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Copyright (c) 2022 Leafee98
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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```
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