Add WIP truncate applet
This commit is contained in:
Nathan Fisher
parent
8c2f7f39e4
commit
8e302f3f85
113
Cargo.lock
generated
113
Cargo.lock
generated
@ -208,18 +208,18 @@ dependencies = [
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[[package]]
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name = "clap"
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version = "4.2.1"
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version = "4.2.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "046ae530c528f252094e4a77886ee1374437744b2bff1497aa898bbddbbb29b3"
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checksum = "9b802d85aaf3a1cdb02b224ba472ebdea62014fccfcb269b95a4d76443b5ee5a"
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dependencies = [
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"clap_builder",
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]
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[[package]]
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name = "clap_builder"
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version = "4.2.1"
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version = "4.2.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "223163f58c9a40c3b0a43e1c4b50a9ce09f007ea2cb1ec258a687945b4b7929f"
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checksum = "14a1a858f532119338887a4b8e1af9c60de8249cd7bafd68036a489e261e37b6"
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dependencies = [
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"bitflags",
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"clap_lex",
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@ -231,7 +231,7 @@ version = "4.2.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "01c22dcfb410883764b29953103d9ef7bb8fe21b3fa1158bc99986c2067294bd"
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dependencies = [
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"clap 4.2.1",
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"clap 4.2.2",
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]
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[[package]]
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@ -240,7 +240,7 @@ version = "0.1.10"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "c7fa41f5e6aa83bd151b70fd0ceaee703d68cd669522795dc812df9edad1252c"
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dependencies = [
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"clap 4.2.1",
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"clap 4.2.2",
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"clap_complete",
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]
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@ -256,7 +256,7 @@ version = "0.2.10"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "4237e29de9c6949982ba87d51709204504fb8ed2fd38232fcb1e5bf7d4ba48c8"
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dependencies = [
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"clap 4.2.1",
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"clap 4.2.2",
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"roff",
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]
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@ -325,7 +325,7 @@ dependencies = [
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"proc-macro2",
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"quote",
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"scratch",
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"syn 2.0.13",
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"syn 2.0.15",
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]
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[[package]]
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@ -342,7 +342,7 @@ checksum = "2345488264226bf682893e25de0769f3360aac9957980ec49361b083ddaa5bc5"
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dependencies = [
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"proc-macro2",
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"quote",
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"syn 2.0.13",
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"syn 2.0.15",
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]
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[[package]]
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@ -380,9 +380,9 @@ version = "0.1.0"
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[[package]]
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name = "filetime"
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version = "0.2.20"
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version = "0.2.21"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "8a3de6e8d11b22ff9edc6d916f890800597d60f8b2da1caf2955c274638d6412"
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checksum = "5cbc844cecaee9d4443931972e1289c8ff485cb4cc2767cb03ca139ed6885153"
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dependencies = [
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"cfg-if",
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"libc",
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@ -672,9 +672,9 @@ checksum = "1792db035ce95be60c3f8853017b3999209281c24e2ba5bc8e59bf97a0c590c1"
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[[package]]
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name = "serde"
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version = "1.0.159"
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version = "1.0.160"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "3c04e8343c3daeec41f58990b9d77068df31209f2af111e059e9fe9646693065"
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checksum = "bb2f3770c8bce3bcda7e149193a069a0f4365bda1fa5cd88e03bca26afc1216c"
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[[package]]
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name = "sha1"
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@ -706,7 +706,7 @@ dependencies = [
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"bitflags-mini",
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"blake2b_simd",
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"chrono",
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"clap 4.2.1",
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"clap 4.2.2",
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"clap_complete",
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"clap_complete_nushell",
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"clap_mangen",
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@ -788,9 +788,9 @@ dependencies = [
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[[package]]
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name = "syn"
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version = "2.0.13"
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version = "2.0.15"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "4c9da457c5285ac1f936ebd076af6dac17a61cfe7826f2076b4d015cf47bc8ec"
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checksum = "a34fcf3e8b60f57e6a14301a2e916d323af98b0ea63c599441eec8558660c822"
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dependencies = [
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"proc-macro2",
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"quote",
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@ -841,7 +841,7 @@ checksum = "f9456a42c5b0d803c8cd86e73dd7cc9edd429499f37a3550d286d5e86720569f"
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dependencies = [
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"proc-macro2",
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"quote",
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"syn 2.0.13",
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"syn 2.0.15",
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]
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[[package]]
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@ -1056,31 +1056,16 @@ version = "0.48.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "e686886bc078bc1b0b600cac0147aadb815089b6e4da64016cbd754b6342700f"
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dependencies = [
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"windows-targets 0.48.0",
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"windows-targets",
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]
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[[package]]
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name = "windows-sys"
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version = "0.45.0"
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version = "0.48.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "75283be5efb2831d37ea142365f009c02ec203cd29a3ebecbc093d52315b66d0"
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checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
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dependencies = [
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"windows-targets 0.42.2",
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]
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[[package]]
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name = "windows-targets"
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version = "0.42.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "8e5180c00cd44c9b1c88adb3693291f1cd93605ded80c250a75d472756b4d071"
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dependencies = [
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"windows_aarch64_gnullvm 0.42.2",
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"windows_aarch64_msvc 0.42.2",
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"windows_i686_gnu 0.42.2",
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"windows_i686_msvc 0.42.2",
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"windows_x86_64_gnu 0.42.2",
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"windows_x86_64_gnullvm 0.42.2",
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"windows_x86_64_msvc 0.42.2",
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"windows-targets",
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]
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[[package]]
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@ -1089,93 +1074,51 @@ version = "0.48.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "7b1eb6f0cd7c80c79759c929114ef071b87354ce476d9d94271031c0497adfd5"
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dependencies = [
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"windows_aarch64_gnullvm 0.48.0",
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"windows_aarch64_msvc 0.48.0",
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"windows_i686_gnu 0.48.0",
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"windows_i686_msvc 0.48.0",
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"windows_x86_64_gnu 0.48.0",
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"windows_x86_64_gnullvm 0.48.0",
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"windows_x86_64_msvc 0.48.0",
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"windows_aarch64_gnullvm",
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"windows_aarch64_msvc",
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"windows_i686_gnu",
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"windows_i686_msvc",
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"windows_x86_64_gnu",
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"windows_x86_64_gnullvm",
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"windows_x86_64_msvc",
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]
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[[package]]
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name = "windows_aarch64_gnullvm"
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version = "0.42.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "597a5118570b68bc08d8d59125332c54f1ba9d9adeedeef5b99b02ba2b0698f8"
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[[package]]
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name = "windows_aarch64_gnullvm"
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version = "0.48.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "91ae572e1b79dba883e0d315474df7305d12f569b400fcf90581b06062f7e1bc"
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[[package]]
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name = "windows_aarch64_msvc"
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version = "0.42.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "e08e8864a60f06ef0d0ff4ba04124db8b0fb3be5776a5cd47641e942e58c4d43"
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[[package]]
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name = "windows_aarch64_msvc"
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version = "0.48.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "b2ef27e0d7bdfcfc7b868b317c1d32c641a6fe4629c171b8928c7b08d98d7cf3"
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[[package]]
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name = "windows_i686_gnu"
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version = "0.42.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "c61d927d8da41da96a81f029489353e68739737d3beca43145c8afec9a31a84f"
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[[package]]
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name = "windows_i686_gnu"
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version = "0.48.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "622a1962a7db830d6fd0a69683c80a18fda201879f0f447f065a3b7467daa241"
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[[package]]
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name = "windows_i686_msvc"
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version = "0.42.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "44d840b6ec649f480a41c8d80f9c65108b92d89345dd94027bfe06ac444d1060"
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[[package]]
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name = "windows_i686_msvc"
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version = "0.48.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "4542c6e364ce21bf45d69fdd2a8e455fa38d316158cfd43b3ac1c5b1b19f8e00"
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|
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[[package]]
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name = "windows_x86_64_gnu"
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version = "0.42.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "8de912b8b8feb55c064867cf047dda097f92d51efad5b491dfb98f6bbb70cb36"
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[[package]]
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name = "windows_x86_64_gnu"
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version = "0.48.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ca2b8a661f7628cbd23440e50b05d705db3686f894fc9580820623656af974b1"
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[[package]]
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name = "windows_x86_64_gnullvm"
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version = "0.42.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "26d41b46a36d453748aedef1486d5c7a85db22e56aff34643984ea85514e94a3"
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[[package]]
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name = "windows_x86_64_gnullvm"
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version = "0.48.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
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[[package]]
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name = "windows_x86_64_msvc"
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version = "0.42.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9aec5da331524158c6d1a4ac0ab1541149c0b9505fde06423b02f5ef0106b9f0"
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[[package]]
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name = "windows_x86_64_msvc"
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version = "0.48.0"
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@ -47,6 +47,7 @@ mod sleep;
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mod sync;
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mod touch;
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mod r#true;
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mod truncate;
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mod unlink;
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mod wc;
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mod which;
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@ -98,6 +99,7 @@ pub fn get(name: &str) -> Option<Box<dyn Cmd>> {
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"sync" => Some(Box::new(sync::Sync::default())),
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"touch" => Some(Box::new(touch::Touch::default())),
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"true" => Some(Box::new(r#true::True::default())),
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"truncate" => Some(Box::new(truncate::Truncate)),
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"unlink" => Some(Box::new(unlink::Unlink::default())),
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"wc" => Some(Box::new(wc::Wc::default())),
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"which" => Some(Box::new(which::Which::default())),
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@ -108,7 +110,7 @@ pub fn get(name: &str) -> Option<Box<dyn Cmd>> {
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}
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}
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pub static COMMANDS: [&str; 45] = [
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pub static COMMANDS: [&str; 46] = [
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"base32",
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"base64",
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"basename",
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@ -148,6 +150,7 @@ pub static COMMANDS: [&str; 45] = [
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"sync",
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"touch",
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"true",
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"truncate",
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"unlink",
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"wc",
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"which",
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213
corebox/commands/truncate/mod.rs
Normal file
213
corebox/commands/truncate/mod.rs
Normal file
@ -0,0 +1,213 @@
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use {
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super::Cmd,
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clap::{Arg, ArgAction, ArgGroup, Command, ValueHint},
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std::{error::Error, fmt, fs, num::ParseIntError},
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};
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#[derive(Debug, Default)]
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pub struct Truncate;
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impl Cmd for Truncate {
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fn cli(&self) -> clap::Command {
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Command::new("truncate")
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.about("truncate or extend the length of files")
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.author("Nathan Fisher")
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.version(env!("CARGO_PKG_VERSION"))
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.args([
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Arg::new("create")
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.help("do not create files if they do not exist")
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.long_help(
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"Do not create files if they do not exist. The truncate \
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utility does not treat this as an error. No error messages are \
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displayed and the exit value is not affected.",
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)
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.short('c')
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.long("no-create")
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.action(ArgAction::SetFalse),
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Arg::new("reference")
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.help("truncate or extend files to the length of RFILE")
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.short('r')
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.long("reference")
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.value_name("RFILE")
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.value_hint(ValueHint::FilePath)
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.num_args(1),
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Arg::new("size")
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.help("set or adjust the file size by SIZE bytes")
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.long_help(
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"If the size argument is preceded by a plus sign (+), files will \
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be extended by this number of bytes. If the size argument is \
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preceded by a dash (-), file lengths will be reduced by no more \
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than this number of bytes, to a minimum length of zero bytes. If \
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the size argument is preceded by a percent sign (%), files will be \
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round up to a multiple of this number of bytes. If the size argument \
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is preceded by a slash sign (/), files will be round down to a \
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multiple of this number of bytes, to a minimum length of zero bytes. \
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Otherwise, the size argument specifies an absolute length to which all \
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files should be extended or reduced as appropriate.\n\nThe size argument \
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may be suffixed with one of K, M, G or T (either upper or lower case) to \
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indicate a multiple of Kilobytes, Megabytes, Gigabytes or Terabytes \
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respectively.",
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)
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.short('s')
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.long("size")
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.allow_hyphen_values(true)
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.value_name("SIZE")
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.num_args(1),
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Arg::new("file").value_name("FILE").num_args(1..),
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])
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.group(
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ArgGroup::new("args")
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.args(["reference", "size"])
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.required(true),
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)
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}
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fn run(&self, matches: &clap::ArgMatches) -> Result<(), Box<dyn std::error::Error>> {
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let size = if let Some(file) = matches.get_one::<String>("reference") {
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let num: i64 = fs::metadata(file)?.len().try_into()?;
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Size { operator: Operator::Equal, num }
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} else if let Some(s) = matches.get_one::<String>("size") {
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parse_size(s)?
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} else {
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unreachable!();
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};
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Ok(())
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}
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fn path(&self) -> Option<shitbox::Path> {
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Some(shitbox::Path::UsrBin)
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}
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}
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enum Operator {
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Equal,
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Add,
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Remove,
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ModUp,
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ModDown,
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}
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struct Size {
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operator: Operator,
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num: i64,
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}
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#[repr(i64)]
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enum Multiplier {
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Kilo = 1024,
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Mega = 1024 * 1024,
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Giga = 1024 * 1024 * 1024,
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Tera = 1024 * 1024 * 1024 * 1024,
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}
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#[derive(Debug)]
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pub enum ParseSizeError {
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EmptySize,
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InvalidChar,
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ParseIntError,
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}
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impl fmt::Display for ParseSizeError {
|
||||
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||||
write!(f, "{self:?}")
|
||||
}
|
||||
}
|
||||
|
||||
impl From<ParseIntError> for ParseSizeError {
|
||||
fn from(_value: ParseIntError) -> Self {
|
||||
Self::ParseIntError
|
||||
}
|
||||
}
|
||||
|
||||
impl Error for ParseSizeError {}
|
||||
|
||||
fn parse_size(size: &str) -> Result<Size, ParseSizeError> {
|
||||
if size.is_empty() {
|
||||
return Err(ParseSizeError::EmptySize);
|
||||
}
|
||||
let mut operator: Option<Operator> = None;
|
||||
let mut num = vec![];
|
||||
let mut multiplier: Option<Multiplier> = None;
|
||||
size.chars().try_for_each(|c| {
|
||||
match c {
|
||||
'+' => {
|
||||
if operator.is_some() || !num.is_empty() || multiplier.is_some() {
|
||||
return Err(ParseSizeError::InvalidChar);
|
||||
} else {
|
||||
operator = Some(Operator::Add);
|
||||
}
|
||||
}
|
||||
'-' => {
|
||||
if operator.is_some() || !num.is_empty() || multiplier.is_some() {
|
||||
return Err(ParseSizeError::InvalidChar);
|
||||
} else {
|
||||
operator = Some(Operator::Remove);
|
||||
}
|
||||
}
|
||||
'%' => {
|
||||
if operator.is_some() || !num.is_empty() || multiplier.is_some() {
|
||||
return Err(ParseSizeError::InvalidChar);
|
||||
} else {
|
||||
operator = Some(Operator::ModUp);
|
||||
}
|
||||
}
|
||||
'/' => {
|
||||
if operator.is_some() || !num.is_empty() || multiplier.is_some() {
|
||||
return Err(ParseSizeError::InvalidChar);
|
||||
} else {
|
||||
operator = Some(Operator::ModDown);
|
||||
}
|
||||
}
|
||||
'k' | 'K' => {
|
||||
if multiplier.is_some() || num.is_empty() {
|
||||
return Err(ParseSizeError::InvalidChar);
|
||||
} else {
|
||||
multiplier = Some(Multiplier::Kilo);
|
||||
}
|
||||
}
|
||||
'm' | 'M' => {
|
||||
if multiplier.is_some() || num.is_empty() {
|
||||
return Err(ParseSizeError::InvalidChar);
|
||||
} else {
|
||||
multiplier = Some(Multiplier::Mega);
|
||||
}
|
||||
}
|
||||
'g' | 'G' => {
|
||||
if multiplier.is_some() || num.is_empty() {
|
||||
return Err(ParseSizeError::InvalidChar);
|
||||
} else {
|
||||
multiplier = Some(Multiplier::Giga);
|
||||
}
|
||||
}
|
||||
't' | 'T' => {
|
||||
if multiplier.is_some() || num.is_empty() {
|
||||
return Err(ParseSizeError::InvalidChar);
|
||||
} else {
|
||||
multiplier = Some(Multiplier::Tera);
|
||||
}
|
||||
}
|
||||
ch if ch.is_digit(10) => {
|
||||
if multiplier.is_some() {
|
||||
return Err(ParseSizeError::InvalidChar);
|
||||
} else {
|
||||
num.push(ch as u8);
|
||||
}
|
||||
}
|
||||
_ => return Err(ParseSizeError::InvalidChar),
|
||||
}
|
||||
Ok(())
|
||||
})?;
|
||||
let mut num: i64 = String::from_utf8(num).unwrap().parse()?;
|
||||
if let Some(m) = multiplier {
|
||||
match m {
|
||||
Multiplier::Kilo => num *= 1024,
|
||||
Multiplier::Mega => num *= (1024 * 1024),
|
||||
Multiplier::Giga => num *= (1024 * 1024 * 1024),
|
||||
Multiplier::Tera => num *= (1024 * 1024 * 1024 * 1024),
|
||||
}
|
||||
}
|
||||
match operator {
|
||||
Some(operator) => Ok(Size { operator, num }),
|
||||
None => Ok(Size { operator: Operator::Equal, num }),
|
||||
}
|
||||
}
|
||||
@ -35,7 +35,12 @@ impl Cmd for Who {
|
||||
session: _,
|
||||
time,
|
||||
} => {
|
||||
println!("{user:9}{line:13}{} {}:{}", time.date(), time.hour(), time.minute());
|
||||
println!(
|
||||
"{user:9}{line:13}{} {}:{}",
|
||||
time.date(),
|
||||
time.hour(),
|
||||
time.minute()
|
||||
);
|
||||
}
|
||||
_ => {}
|
||||
}
|
||||
|
||||
@ -16,6 +16,24 @@ fn new_utsname() -> utsname {
|
||||
}
|
||||
}
|
||||
|
||||
pub fn ftruncate(fd: &File, len: i64) -> Result<(), Box<dyn Error>> {
|
||||
let ret = unsafe { syscall!(FTRUNCATE, fd.as_raw_fd(), len) };
|
||||
if ret == 0 {
|
||||
Ok(())
|
||||
} else {
|
||||
Err(Errno::from(ret).into())
|
||||
}
|
||||
}
|
||||
|
||||
pub fn truncate(path: &str, len: i64) -> Result<(), Box<dyn Error>> {
|
||||
let ret = unsafe { syscall!(TRUNCATE, CString::new(path)?.as_ptr(), len) };
|
||||
if ret == 0 {
|
||||
Ok(())
|
||||
} else {
|
||||
Err(Errno::from(ret).into())
|
||||
}
|
||||
}
|
||||
|
||||
#[allow(clippy::cast_sign_loss)]
|
||||
pub fn gethostname() -> Result<String, Box<dyn Error>> {
|
||||
let mut uts = new_utsname();
|
||||
|
||||
Loading…
Reference in New Issue
Block a user