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Added x-hack to expr example for safety

Lawrence Velázquez
2024-03-08 23:21:13 -05:00
parent f3bb52a293
commit 039b5d42fb
1 changed files with 2 additions and 1 deletions
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3
SC3015.md

@@ -13,7 +13,8 @@ fi
```sh
#!/bin/sh
if expr "$var" : '.*foo[0-9]\{1,\}' >/dev/null; then
# Use the x-hack to handle strings like '('.
if expr "X$var" : 'X.*foo[0-9]\{1,\}' >/dev/null; then
echo matched
fi
```