pyenv/libexec/rbenv-version-file-read

#!/usr/bin/env bash
# Usage: rbenv version-file-read <file>
set -e
[ -n "$RBENV_DEBUG" ] && set -x

VERSION_FILE="$1"

if [ -s "$VERSION_FILE" ]; then
  # Read the first word from the specified version file. Avoid reading it whole.
  IFS="${IFS}"$'\r'
  read -n 1024 -d "" -r version _ <"$VERSION_FILE" || :

  if [ "$version" = ".." ] || [[ $version == */* ]]; then
    echo "rbenv: invalid version in \`$VERSION_FILE'" >&2
  elif [ -n "$version" ]; then
    echo "$version"
    exit
  fi
fi

exit 1
Extract rbenv-version-file{,-read,-write} 2011-08-18 15:11:40 -04:00			`#!/usr/bin/env bash`
Documentation tweaks 2012-12-29 23:05:04 -05:00			`# Usage: rbenv version-file-read <file>`
Extract rbenv-version-file{,-read,-write} 2011-08-18 15:11:40 -04:00			`set -e`
Set RBENV_DEBUG=1 to see what's going on under the hood 2011-09-12 11:11:59 -04:00			`[ -n "$RBENV_DEBUG" ] && set -x`
Extract rbenv-version-file{,-read,-write} 2011-08-18 15:11:40 -04:00
			`VERSION_FILE="$1"`

Don't bother reading empty version files 2022-03-08 13:56:22 -05:00			`if [ -s "$VERSION_FILE" ]; then`
Remove ableist language 2018-06-05 10:43:31 -04:00			`# Read the first word from the specified version file. Avoid reading it whole.`
Add \r to IFS instead of removing it manually 2014-03-20 20:36:39 -04:00			`IFS="${IFS}"$'\r'`
Simplify version file read Avoid a subshell and external `cut` invocation, as well as a throwaway intermediate array. 2022-03-08 13:58:58 -05:00			`read -n 1024 -d "" -r version _ <"$VERSION_FILE" \|\| :`
Don't exit out of piped loop Can cause the stdin of cat to close too soon causing: echo: write error: Broken pipe Fixes #97 2011-09-28 13:06:53 -04:00
Disallow path segments and directory traversal in `.ruby-version` files A malicious `.ruby-version` file in the current directory could inject `../../../` into the version string and trigger execution of binaries outside of `RBENV_ROOT/versions/`. Fixes #977 OVE-20170303-0004 2019-04-03 06:58:25 -04:00			`if [ "$version" = ".." ] \|\| [[ $version == / ]]; then`
			echo "rbenv: invalid version in \`$VERSION_FILE'" >&2
			`elif [ -n "$version" ]; then`
Don't exit out of piped loop Can cause the stdin of cat to close too soon causing: echo: write error: Broken pipe Fixes #97 2011-09-28 13:06:53 -04:00			`echo "$version"`
			`exit`
			`fi`
Extract rbenv-version-file{,-read,-write} 2011-08-18 15:11:40 -04:00			`fi`
`rbenv-version-name` returns `system` for empty version files. Closes #62, #65, #77. 2011-09-09 16:52:31 -04:00
			`exit 1`