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pesubst(1) hxtools pesubst(1) Name pesubst -- perl-regexp stream substitution Syntax pesubst [-f] [-s pattern] [-d pattern] [-m modifiers] file... Description pesubst can substitute strings in streams and files, and does so by us- ing the Perl engine. It obsoletes sed(1) for simple substitution tasks. Options -f Fill the replacement string with NULs to bring it up to the size of the original string. -s pattern Source pattern to search for in files. This can be any valid Perl regular expression. Files are slurped in as a whole, so matching across newlines should be no problem (with the -ms flag). -d pattern Destination (replacement) string. This can be any valid string Perl accepts. For details see the perlre(1) manpage. -m modifiers A string of modifiers to apply to the regex. See below. Modifiers e Evaluate the right side as an expression. g Replace globally, i.e., all occurrences. This is always enabled in pesubst. i Do case-insensitive pattern matching. m Treat string as multiple lines. That is, change "^" and "$" from matching the start or end of the string to matching the start or end of any line anywhere within the string. o Compile pattern only once. s Treat string as single line. That is, change "." to match any character whatsoever, even a newline, which normally it would not match. x Extend your pattern's legibility by permitting whitespace and comments. Examples Change all occurrences of foo (case-insensitive) to bar: pesubst -s foo -d bar -ms myfile Change all Shell-style comments into C++ ones: pesubst -s '^#' -d // -mm myfile Using both the "m" and "i" flags: pesubst -s '^#INCLUDE\s+' -d '#include ' -mmi myfile.c See also hxtools(7), pegrep(1) hxtools 2008-02-06 pesubst(1)
Name | Syntax | Description | Options | Modifiers | Examples | See also
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