rouggy
bb596c8aa9
fatalBox off Windows was a single println. That goes to stderr, and a
binary started from a file manager or a .desktop launcher has no stderr
anyone will read — so a carefully worded refusal ("the folder OpsLog
keeps everything in cannot be written to…") reached the operator as "I
click it and nothing happens", which is the least useful thing a program
can say.
It now opens a dialog through zenity or kdialog when either is present —
both ship with every distribution's desktop task — and writes to stderr
either way. Neither is required: the startup log already carries the
same text, and nothing here may stop OpsLog from exiting.
40 lines
1.2 KiB
Go
40 lines
1.2 KiB
Go
//go:build !windows
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package main
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import (
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"os"
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"os/exec"
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)
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// fatalBox says why OpsLog is not starting, as visibly as the desktop allows.
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//
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// It used to be one println. That goes to stderr, and a binary started from a
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// file manager or a .desktop launcher has no stderr anybody will ever read — so
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// the refusal that was carefully worded arrived as "I click it and nothing
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// happens", which is the least useful thing a program can say.
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//
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// So: a real dialog when the desktop has one of the two tools that every
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// distribution ships with its desktop task, and stderr regardless. Neither is
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// required — the startup log has the same text, and nothing here is allowed to
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// stop OpsLog from exiting.
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func fatalBox(title, text string) {
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os.Stderr.WriteString(title + ": " + text + "\n")
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for _, c := range [][]string{
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{"zenity", "--error", "--no-wrap", "--title", title, "--text", text},
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{"kdialog", "--title", title, "--error", text},
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// Neither is a hard requirement, and on a headless box there is nothing
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// to show a dialog on anyway.
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} {
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if _, err := exec.LookPath(c[0]); err != nil {
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continue
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}
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cmd := exec.Command(c[0], c[1:]...)
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if err := cmd.Start(); err != nil {
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continue
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}
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_ = cmd.Wait()
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return
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}
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}
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