diff options
Diffstat (limited to 'runsc/cmd/syscalls.go')
| -rw-r--r-- | runsc/cmd/syscalls.go | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/runsc/cmd/syscalls.go b/runsc/cmd/syscalls.go index 7072547be..a37d66139 100644 --- a/runsc/cmd/syscalls.go +++ b/runsc/cmd/syscalls.go @@ -32,9 +32,10 @@ import ( // Syscalls implements subcommands.Command for the "syscalls" command. type Syscalls struct { - output string - os string - arch string + format string + os string + arch string + filename string } // CompatibilityInfo is a map of system and architecture to compatibility doc. @@ -95,16 +96,17 @@ func (*Syscalls) Usage() string { // SetFlags implements subcommands.Command.SetFlags. func (s *Syscalls) SetFlags(f *flag.FlagSet) { - f.StringVar(&s.output, "o", "table", "Output format (table, csv, json).") + f.StringVar(&s.format, "format", "table", "Output format (table, csv, json).") f.StringVar(&s.os, "os", osAll, "The OS (e.g. linux)") f.StringVar(&s.arch, "arch", archAll, "The CPU architecture (e.g. amd64).") + f.StringVar(&s.filename, "filename", "", "Output filename (otherwise stdout).") } // Execute implements subcommands.Command.Execute. func (s *Syscalls) Execute(_ context.Context, f *flag.FlagSet, args ...interface{}) subcommands.ExitStatus { - out, ok := outputMap[s.output] + out, ok := outputMap[s.format] if !ok { - Fatalf("Unsupported output format %q", s.output) + Fatalf("Unsupported output format %q", s.format) } // Build map of all supported architectures. @@ -124,7 +126,14 @@ func (s *Syscalls) Execute(_ context.Context, f *flag.FlagSet, args ...interface Fatalf("%v", err) } - if err := out(os.Stdout, info); err != nil { + w := os.Stdout // Default. + if s.filename != "" { + w, err = os.OpenFile(s.filename, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0644) + if err != nil { + Fatalf("Error opening %q: %v", s.filename, err) + } + } + if err := out(w, info); err != nil { Fatalf("Error writing output: %v", err) } |