You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
17 lines
540 B
17 lines
540 B
1 year ago
|
#!/bin/sh
|
||
|
|
|
||
|
|
# POSIX compliant regular expressions
|
||
|
|
# Matches any string that contains a null byte or begins or ends with a /
|
||
|
|
REGEX1='(^/|/$|\\0)'
|
||
|
|
# Matches any string longer than 255 characters (for a single filename)
|
||
|
|
REGEX2='^.{256,}$'
|
||
|
|
# Matches any string longer than 4096 characters (for a full path)
|
||
|
|
REGEX3='^.{4097,}$'
|
||
|
|
|
||
|
|
if echo "$1" | grep -Eq "$REGEX1" || echo "$1" | grep -Eq "$REGEX2" || echo "$1" | grep -Eq "$REGEX3"; then
|
||
|
|
# If any regex matches, this is an invalid path
|
||
|
|
exit 1
|
||
|
|
else
|
||
|
|
# Otherwise, it's valid
|
||
|
|
exit 0
|
||
|
|
fi
|