walkero
/
pcre2
1
0
Fork 0
Code Issues Pull Requests Projects Releases 1 Wiki Activity

Add comment about binary zeros.

This commit is contained in:
Philip.Hazel 2016-04-06 08:19:45 +00:00
parent 992322039d
commit 1bcea9b2da
1 changed files with 11 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
doc/pcre2grep.1
View File

@ -1,4 +1,4 @@
.TH PCRE2GREP 1 "01 April 2016" "PCRE2 10.22"
.TH PCRE2GREP 1 "06 April 2016" "PCRE2 10.22"
.SH NAME
pcre2grep - a grep with Perl-compatible regular expressions.
.SH SYNOPSIS
@ -675,7 +675,7 @@ following substrings specifying arguments:
.sp
executable_name|arg1|arg2|...
.sp
Any substirng (including the executable name) may contain escape sequences
Any substring (including the executable name) may contain escape sequences
started by a dollar character: $<digits> or ${<digits>} is replaced by the
captured substring of the given decimal number, which must be greater than
zero. If the number is greater than the number of capturing substrings, or if
@ -695,10 +695,14 @@ a single dollar and $| is replaced by a pipe character. Here is an example:
Arg1: [1] [234] [4] Arg2: |1| ()
12345
.sp
Any syntax errors in the string (for example, a dollar not followed by another
character) cause the callout to be ignored. If running the program fails for
any reason (including the non-existence of the executable), a local matching
failure occurs and the matcher backtracks in the normal way.
The parameters for the \fBexecv()\fP system call that is used to run the
program or script are zero-terminated strings. This means that binary zero
characters in the callout argument will cause premature termination of their
substrings, and therefore should not be present. Any syntax errors in the
string (for example, a dollar not followed by another character) cause the
callout to be ignored. If running the program fails for any reason (including
the non-existence of the executable), a local matching failure occurs and the
matcher backtracks in the normal way.
.
.
.SH "MATCHING ERRORS"
@ -748,6 +752,6 @@ Cambridge, England.
.rs
.sp
.nf
Last updated: 01 April 2016
Last updated: 06 April 2016
Copyright (c) 1997-2016 University of Cambridge.
.fi