Interactive device selection

Cargo.lock

@@ -13,12 +13,13 @@ name = "alma"
 version = "0.7.0"
 dependencies = [
  "byte-unit 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ctrlc 3.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "nix 0.12.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nix 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.92 (registry+https://github.com/rust-lang/crates.io-index)",
  "simplelog 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "structopt 0.2.16 (registry+https://github.com/rust-lang/crates.io-index)",
+ "structopt 0.2.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempfile 3.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "which 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -55,7 +56,7 @@ version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "termion 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "termion 1.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -66,14 +67,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "backtrace"
-version = "0.3.30"
+version = "0.3.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "backtrace-sys 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-demangle 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-demangle 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -87,7 +88,7 @@ dependencies = [
 
 [[package]]
 name = "bitflags"
-version = "1.1.0"
+version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -105,12 +106,12 @@ version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 1.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "byteorder"
-version = "1.3.2"
+version = "1.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -140,7 +141,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -152,7 +153,7 @@ name = "cloudabi"
 version = "0.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -160,6 +161,15 @@ name = "constant_time_eq"
 version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "ctrlc"
+version = "3.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "nix 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "dirs"
 version = "1.0.5"
@@ -175,7 +185,7 @@ name = "failure"
 version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace 0.3.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace 0.3.26 (registry+https://github.com/rust-lang/crates.io-index)",
  "failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -186,7 +196,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.36 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.34 (registry+https://github.com/rust-lang/crates.io-index)",
  "synstructure 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -228,10 +238,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "nix"
-version = "0.12.1"
+version = "0.14.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "cc 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -411,19 +421,19 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.1.7"
+version = "1.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "aho-corasick 0.7.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex-syntax 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.6.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "utf8-ranges 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "utf8-ranges 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "regex-syntax"
-version = "0.6.7"
+version = "0.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -431,7 +441,7 @@ dependencies = [
 
 [[package]]
 name = "remove_dir_all"
-version = "0.5.2"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -439,7 +449,7 @@ dependencies = [
 
 [[package]]
 name = "rustc-demangle"
-version = "0.1.15"
+version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -462,7 +472,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.36 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.34 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -482,27 +492,27 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "structopt"
-version = "0.2.16"
+version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "structopt-derive 0.2.16 (registry+https://github.com/rust-lang/crates.io-index)",
+ "structopt-derive 0.2.15 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "structopt-derive"
-version = "0.2.16"
+version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "heck 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.36 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.34 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "syn"
-version = "0.15.36"
+version = "0.15.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -517,7 +527,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
  "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.36 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.34 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -530,7 +540,7 @@ dependencies = [
  "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_syscall 0.1.54 (registry+https://github.com/rust-lang/crates.io-index)",
- "remove_dir_all 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "remove_dir_all 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -539,14 +549,14 @@ name = "term"
 version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "dirs 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "termion"
-version = "1.5.3"
+version = "1.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -611,7 +621,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "utf8-ranges"
-version = "1.0.3"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -659,18 +669,19 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum arrayvec 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)" = "92c7fb76bc8826a8b33b4ee5bb07a247a81e76764ab4d55e8f73e3a4d8808c71"
 "checksum atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "9a7d5b8723950951411ee34d271d99dddcc2035a16ab25310ea2c8cfd4369652"
 "checksum autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "0e49efa51329a5fd37e7c79db4621af617cd4e3e5bc224939808d076077077bf"
-"checksum backtrace 0.3.30 (registry+https://github.com/rust-lang/crates.io-index)" = "ada4c783bb7e7443c14e0480f429ae2cc99da95065aeab7ee1b81ada0419404f"
+"checksum backtrace 0.3.26 (registry+https://github.com/rust-lang/crates.io-index)" = "1a13fc43f04daf08ab4f71e3d27e1fc27fc437d3e95ac0063a796d92fb40f39b"
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-"checksum bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3d155346769a6855b86399e9bc3814ab343cd3d62c7e985113d46a0ec3c281fd"
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 "checksum cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "ddfc5b9aa5d4507acaf872de71051dfd0e309860e88966e1051e462a077aac4f"
 "checksum constant_time_eq 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "8ff012e225ce166d4422e0e78419d901719760f62ae2b7969ca6b564d1b54a9e"
+"checksum ctrlc 3.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "c7dfd2d8b4c82121dfdff120f818e09fc4380b0b7e17a742081a89b94853e87f"
 "checksum dirs 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "3fd78930633bd1c6e35c4b42b1df7b0cbc6bc191146e512bb3bedf243fcc3901"
 "checksum failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "795bd83d3abeb9220f257e597aa0080a508b27533824adf336529648f6abf7e2"
 "checksum failure_derive 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "ea1063915fd7ef4309e222a5a07cf9c319fb9c7836b1f89b85458672dbb127e1"
@@ -680,7 +691,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)" = "6281b86796ba5e4366000be6e9e18bf35580adf9e63fbe2294aadb587613a319"
 "checksum log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c84ec4b527950aa83a329754b01dbe3f58361d1c5efacd1f6d68c494d08a17c6"
 "checksum memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2efc7bc57c883d4a4d6e3246905283d8dae951bb3bd32f49d6ef297f546e1c39"
-"checksum nix 0.12.1 (registry+https://github.com/rust-lang/crates.io-index)" = "319fffb13b63c0f4ff5a4e1c97566e7e741561ff5d03bf8bbf11653454bbd70b"
+"checksum nix 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)" = "6c722bee1037d430d0f8e687bbdbf222f27cc6e4e68d5caf630857bb2b6dbdce"
 "checksum nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)" = "2f9667ddcc6cc8a43afc9b7917599d7216aa09c463919ea32c59ed6cac8bc945"
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 "checksum strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
-"checksum structopt 0.2.16 (registry+https://github.com/rust-lang/crates.io-index)" = "fa19a5a708e22bb5be31c1b6108a2a902f909c4b9ba85cba44c06632386bc0ff"
+"checksum structopt 0.2.15 (registry+https://github.com/rust-lang/crates.io-index)" = "3d0760c312538987d363c36c42339b55f5ee176ea8808bbe4543d484a291c8d1"
-"checksum structopt-derive 0.2.16 (registry+https://github.com/rust-lang/crates.io-index)" = "c6d59d0ae8ef8de16e49e3ca7afa16024a3e0dfd974a75ef93fdc5464e34523f"
+"checksum structopt-derive 0.2.15 (registry+https://github.com/rust-lang/crates.io-index)" = "528aeb7351d042e6ffbc2a6fb76a86f9b622fdf7c25932798e7a82cb03bc94c6"
-"checksum syn 0.15.36 (registry+https://github.com/rust-lang/crates.io-index)" = "8b4f551a91e2e3848aeef8751d0d4eec9489b6474c720fd4c55958d8d31a430c"
+"checksum syn 0.15.34 (registry+https://github.com/rust-lang/crates.io-index)" = "a1393e4a97a19c01e900df2aec855a29f71cf02c402e2f443b8d2747c25c5dbe"
 "checksum synstructure 0.10.2 (registry+https://github.com/rust-lang/crates.io-index)" = "02353edf96d6e4dc81aea2d8490a7e9db177bf8acb0e951c24940bf866cb313f"
 "checksum tempfile 3.0.8 (registry+https://github.com/rust-lang/crates.io-index)" = "7dc4738f2e68ed2855de5ac9cdbe05c9216773ecde4739b2f095002ab03a13ef"
 "checksum term 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "edd106a334b7657c10b7c540a0106114feadeb4dc314513e97df481d5d966f42"
-"checksum termion 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "6a8fb22f7cde82c8220e5aeacb3258ed7ce996142c77cba193f203515e26c330"
+"checksum termion 1.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "dde0593aeb8d47accea5392b39350015b5eccb12c0d98044d856983d89548dea"
 "checksum textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
 "checksum thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
 "checksum time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "db8dcfca086c1143c9270ac42a2bbd8a7ee477b78ac8e45b19abfb0cbede4b6f"
@@ -725,7 +736,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum unicode-segmentation 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1967f4cdfc355b37fd76d2a954fb2ed3871034eb4f26d60537d88795cfc332a9"
 "checksum unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "882386231c45df4700b275c7ff55b6f3698780a650026380e72dabe76fa46526"
 "checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
-"checksum utf8-ranges 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "9d50aa7650df78abf942826607c62468ce18d9019673d4a2ebe1865dbb96ffde"
+"checksum utf8-ranges 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "796f7e48bef87609f7ade7e06495a87d5cd06c7866e6a5cbfceffc558a243737"
 "checksum vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "05c78687fb1a80548ae3250346c3db86a80a7cdd77bda190189f2d0a0987c81a"
 "checksum void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "6a02e4885ed3bc0f2de90ea6dd45ebcbb66dacffe03547fadbb0eeae2770887d"
 "checksum which 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b57acb10231b9493c8472b20cb57317d0679a49e0bdbee44b3b803a6473af164"

Cargo.toml

@@ -11,7 +11,8 @@ log = "0.4.6"
 structopt = "0.2.14"
 simplelog = "0.5.3"
 tempfile = "3.0.5"
-nix = "0.12.0"
 serde = { version = "1.0.92", features = ["derive"] }
 toml = "0.5.1"
 byte-unit = "2.1.0"
+ctrlc = "3.1.3"
+nix = "0.14.1"

src/args.rs

@@ -33,7 +33,7 @@ pub enum Command {
 pub struct CreateCommand {
     /// Either a path to a removable block device or a nonexiting file if --image is specified
     #[structopt(parse(from_os_str))]
-    pub path: PathBuf,
+    pub path: Option<PathBuf>,
 
     /// Additional pacakges to install
     #[structopt(short = "p", long = "extra-packages", value_name = "package")]
@@ -55,7 +55,8 @@ pub struct CreateCommand {
     #[structopt(
         long = "image",
         parse(try_from_str = "parse_bytes"),
-        value_name = "size"
+        value_name = "size",
+        requires = "path"
     )]
     pub image: Option<Byte>,
 }

src/error.rs

@@ -91,6 +91,15 @@ pub enum ErrorKind {
 
     #[fail(display = "Error setting up a loop device: {}", _0)]
     Losetup(String),
+
+    #[fail(display = "Error querying removeable devices")]
+    RemoveableDevicesQuery,
+
+    #[fail(display = "There are no removable devices")]
+    NoRemovableDevices,
+
+    #[fail(display = "Error selecing device")]
+    DeviceSelection,
 }
 
 impl Fail for Error {

src/main.rs

@@ -13,14 +13,15 @@ use crate::tool::Tool;
 use byte_unit::Byte;
 use failure::{Fail, ResultExt};
 use log::{debug, error, info, warn};
-use nix::sys::signal;
 use simplelog::*;
 use std::collections::HashSet;
 use std::fs;
-use std::io::Write;
+use std::io::{stdin, stdout, BufRead, Write};
 use std::os::unix::{fs::PermissionsExt, process::CommandExt as UnixCommandExt};
-use std::path::Path;
+use std::path::{Path, PathBuf};
 use std::process::exit;
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::Arc;
 use std::thread;
 use std::time::Duration;
 use structopt::StructOpt;
@@ -91,7 +92,45 @@ fn create_image(path: &Path, size: Byte) -> Result<LoopDevice, Error> {
     LoopDevice::create(path)
 }
 
-fn create(command: CreateCommand) -> Result<(), Error> {
+fn select_block_device(running: Arc<AtomicBool>) -> Result<PathBuf, Error> {
+    let devices = get_removable_devices()?;
+
+    if devices.is_empty() {
+        Err(ErrorKind::NoRemovableDevices)?
+    }
+
+    devices
+        .iter()
+        .enumerate()
+        .for_each(|(i, d)| println!("{}) {}", i + 1, d));
+
+    print!("\nSelect a removable device by Typing its number: ");
+    stdout().lock().flush().ok();
+
+    let mut buffer = String::new();
+    loop {
+        stdin().lock().read_line(&mut buffer).unwrap();
+
+        if buffer.is_empty() || !running.load(Ordering::SeqCst) {
+            println!();
+            Err(ErrorKind::DeviceSelection)?;
+        }
+
+        let choice = buffer
+            .trim()
+            .parse::<usize>()
+            .ok()
+            .filter(|n| 0 < *n && *n <= devices.len());
+
+        if let Some(choice) = choice {
+            return Ok(PathBuf::from("/dev").join(&devices[choice - 1].name));
+        } else {
+            error!("Bad choice");
+        }
+    }
+}
+
+fn create(command: CreateCommand, running: Arc<AtomicBool>) -> Result<(), Error> {
     let presets = presets::Presets::load(&command.presets)?;
 
     let sgdisk = Tool::find("sgdisk")?;
@@ -111,8 +150,14 @@ fn create(command: CreateCommand) -> Result<(), Error> {
         None
     };
 
+    let storage_device_path = if let Some(path) = command.path {
+        path
+    } else {
+        select_block_device(running)?
+    };
+
     let image_loop = if let Some(size) = command.image {
-        Some(create_image(&command.path, size)?)
+        Some(create_image(&storage_device_path, size)?)
     } else {
         None
     };
@@ -124,8 +169,9 @@ fn create(command: CreateCommand) -> Result<(), Error> {
                 info!("Using loop device at {}", loop_dev.path().display());
                 loop_dev.path()
             })
-            .unwrap_or(&command.path),
+            .unwrap_or(&storage_device_path),
     )?;
+
     let mount_point = tempdir().context(ErrorKind::TmpDirError)?;
     let disk_path = storage_device.path();
 
@@ -403,10 +449,6 @@ fn qemu(command: QemuCommand) -> Result<(), Error> {
     Err(err).context(ErrorKind::Qemu)?
 }
 
-extern "C" fn handle_sigint(_: i32) {
-    warn!("Interrupted");
-}
-
 fn main() {
     let app = App::from_args();
 
@@ -417,19 +459,17 @@ fn main() {
     };
     CombinedLogger::init(vec![TermLogger::new(log_level, Config::default()).unwrap()]).unwrap();
 
-    let sig_action = signal::SigAction::new(
+    let running = Arc::new(AtomicBool::new(true));
-        signal::SigHandler::Handler(handle_sigint),
+    let r = running.clone();
-        signal::SaFlags::empty(),
+
-        signal::SigSet::empty(),
+    ctrlc::set_handler(move || {
-    );
+        warn!("Interrupted");
-    unsafe {
+        r.store(false, Ordering::SeqCst);
-        signal::sigaction(signal::SIGINT, &sig_action).unwrap();
+    })
-        signal::sigaction(signal::SIGTERM, &sig_action).unwrap();
+    .expect("Error setting Ctrl-C handler");
-        signal::sigaction(signal::SIGQUIT, &sig_action).unwrap();
-    }
 
     let result = match app.cmd {
-        Command::Create(command) => create(command),
+        Command::Create(command) => create(command, running),
         Command::Chroot(command) => chroot(command),
         Command::Qemu(command) => qemu(command),
     };

src/storage/mod.rs

@@ -4,6 +4,7 @@ mod loop_device;
 mod markers;
 mod mount_stack;
 mod partition;
+mod removeable_devices;
 mod storage_device;
 
 pub use crypt::{is_encrypted_device, EncryptedDevice};
@@ -11,4 +12,5 @@ pub use filesystem::{Filesystem, FilesystemType};
 pub use loop_device::LoopDevice;
 pub use markers::BlockDevice;
 pub use mount_stack::MountStack;
+pub use removeable_devices::get_removable_devices;
 pub use storage_device::StorageDevice;

src/storage/removeable_devices.rs

@@ -0,0 +1,85 @@
+use crate::error::{Error, ErrorKind};
+use byte_unit::Byte;
+use failure::ResultExt;
+use std::{fmt, fs};
+
+#[derive(Debug)]
+pub struct Device {
+    model: String,
+    vendor: String,
+    size: Byte,
+    pub name: String,
+}
+
+impl fmt::Display for Device {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            f,
+            "{} {} ({})",
+            self.vendor,
+            self.model,
+            self.size.get_appropriate_unit(true)
+        )
+    }
+}
+
+fn trimmed(source: String) -> String {
+    String::from(source.trim_end())
+}
+
+pub fn get_removable_devices() -> Result<Vec<Device>, Error> {
+    let mut result = Vec::new();
+
+    for entry in fs::read_dir("/sys/block").context(ErrorKind::RemoveableDevicesQuery)? {
+        let entry = entry.context(ErrorKind::RemoveableDevicesQuery)?;
+
+        let removable = fs::read_to_string(entry.path().join("removable"))
+            .context(ErrorKind::RemoveableDevicesQuery)?;
+
+        if removable != "1\n" {
+            continue;
+        }
+
+        let model = fs::read_to_string(entry.path().join("device/model"))
+            .map(trimmed)
+            .context(ErrorKind::RemoveableDevicesQuery)?;
+
+        if model == "CD-ROM" {
+            continue;
+        }
+
+        result.push(Device {
+            name: entry
+                .path()
+                .file_name()
+                .unwrap()
+                .to_string_lossy()
+                .into_owned(),
+            model,
+            vendor: fs::read_to_string(entry.path().join("device/vendor"))
+                .map(trimmed)
+                .context(ErrorKind::RemoveableDevicesQuery)?,
+            size: Byte::from_bytes(
+                fs::read_to_string(entry.path().join("size"))
+                    .context(ErrorKind::RemoveableDevicesQuery)?
+                    .trim()
+                    .parse::<u128>()
+                    .unwrap()
+                    * 512,
+            ),
+        })
+    }
+
+    Ok(result)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn sanity() {
+        let devices = get_removable_devices().unwrap();
+        println!("{:?}", devices);
+    }
+}