53 lines
1 KiB
Bash
Executable file
53 lines
1 KiB
Bash
Executable file
#!/bin/sh
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set -eu
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usage() {
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printf '%s\n' "usage: left4me-journalctl <server-name> --lines <n> --follow|--no-follow" >&2
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exit 2
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}
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validate_name() {
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name=$1
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[ -n "$name" ] || usage
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case "$name" in
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.*|*..*|*/*|*\\*) usage ;;
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esac
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case "$name" in
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*[!A-Za-z0-9_.-]*) usage ;;
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esac
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}
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[ "$#" -eq 4 ] || usage
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name=$1
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lines_flag=$2
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lines=$3
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follow_flag=$4
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validate_name "$name"
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[ "$lines_flag" = "--lines" ] || usage
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case "$lines" in
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''|*[!0-9]*) usage ;;
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esac
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follow_arg=
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case "$follow_flag" in
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--follow) follow_arg=-f ;;
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--no-follow) ;;
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*) usage ;;
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esac
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unit="left4me-server@${name}.service"
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if [ -x /bin/journalctl ]; then
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journalctl=/bin/journalctl
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elif [ -x /usr/bin/journalctl ]; then
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journalctl=/usr/bin/journalctl
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else
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printf '%s\n' 'journalctl not found at /bin/journalctl or /usr/bin/journalctl' >&2
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exit 69
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fi
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if [ -n "$follow_arg" ]; then
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exec "$journalctl" -u "$unit" -n "$lines" -o cat "$follow_arg"
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fi
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exec "$journalctl" -u "$unit" -n "$lines" -o cat
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