Date: Sun, 23 Nov 2025 12:01:30 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 291172] regexp.h routines behave differently for my program and in the base grep Message-ID: <bug-291172-227-8cuJBjGhhW@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-291172-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291172 --- Comment #2 from Gleb Popov <arrowd@FreeBSD.org> --- (In reply to Konstantin Belousov from comment #1) > 1. '+' must not be escaped by backslash, it becomes ordinary character to match > 2. '+' only works as metasymbol for extended regexps, so you need REG_EXTENDED According to https://en.wikibooks.org/wiki/Regular_Expressions/POSIX-Extended_Regular_Expressions when working in REG_BASIC mode one should use '\+' and it works just like '+' in REG_EXTENDED. > BTW, why did you specified literal 4 as flag for regexec? It was a remnant of my experimentation when comparing to grep. grep passes 4 as eflags when calling regexec. Let me reupload the test program. -- You are receiving this mail because: You are the assignee for the bug.home | help
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