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Better explanation of the issue

Alesiani Marco
2021-10-18 17:35:42 +02:00
parent fb7dfefa02
commit f292856a3b
1 changed files with 6 additions and 2 deletions
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SC2162.md

@@ -16,9 +16,13 @@ read -r name
### Rationale: ### Rationale:
By default, `read` will interpret backslashes before spaces and line feeds, and otherwise strip them. This is rarely expected or desired. By default, `read` will interpret backslashes before spaces and line feeds (i.e. you can use backslashes in your string as an escape character). This is rarely expected or desired.
Normally you just want to read data, which is what `read -r` does. You should always use `-r` unless you have a good reason not to. Normally you just want to read data _including backslashes_ which are part of the input string and have no special escape meaning, which is what `read -r` does. You should always use `-r` unless you have a good reason not to:
> -r
>
> If this option is given, backslash does not act as an escape character.
Note that [`read -r`](https://www.tldp.org/LDP/abs/html/internal.html#READR) will still strip leading and trailing spaces. `IFS="" read -r` prevents this. Note that [`read -r`](https://www.tldp.org/LDP/abs/html/internal.html#READR) will still strip leading and trailing spaces. `IFS="" read -r` prevents this.