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Updated SC2095 (markdown)

Victor Engmark
2020-06-25 15:28:28 +12:00
parent 671b15c8d7
commit 9c9b487f40
1 changed files with 12 additions and 0 deletions
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12
SC2095.md

@@ -19,6 +19,18 @@ do
ssh -n "$host" "uptime" ssh -n "$host" "uptime"
done < hosts.txt done < hosts.txt
``` ```
or
```sh
while read -r host
do
ssh "$host" <<'EOF'
uptime
EOF
done < hosts.txt
```
### Rationale: ### Rationale:
Commands that process stdin will compete with the `read` statement for input. This is especially tricky for commands you wouldn't expect reads from stdin, like `ssh .. uptime`, `ffmpeg` and `mplayer`. Commands that process stdin will compete with the `read` statement for input. This is especially tricky for commands you wouldn't expect reads from stdin, like `ssh .. uptime`, `ffmpeg` and `mplayer`.