regex(3): Add support for \< and \> word delimiters
Solaris and other OSs have support for \< and \> as word delimiters in utilities like sed(1). These are useful to have for general compatiblity with Solaris but should be avoided for portability with other systems, including the traditional BSDs. Bump __FreeBSD_version as this is likely to affect some userland utilities. Reference: https://www.illumos.org/issues/516 PR: bin/153257 Obtained from: Illumos MFC after: 1 month
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@ -36,7 +36,7 @@
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.\" @(#)re_format.7 8.3 (Berkeley) 3/20/94
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.\" $FreeBSD$
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.\"
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.Dd March 20, 1994
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.Dd June 30, 2014
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.Dt RE_FORMAT 7
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.Os
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.Sh NAME
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@ -314,6 +314,13 @@ compatible with but not specified by
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.St -p1003.2 ,
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and should be used with
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caution in software intended to be portable to other systems.
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The additional word delimiters
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.Ql \e<
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and
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.Ql \e>
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are provided to ease compatibility with traditional
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.Xr svr4 4
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systems but are not portable and should be avoided.
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.Pp
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In the event that an RE could match more than one substring of a given
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string,
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@ -412,8 +412,18 @@ p_ere_exp(struct parse *p)
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case '\\':
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(void)REQUIRE(MORE(), REG_EESCAPE);
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wc = WGETNEXT();
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switch (wc) {
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case '<':
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EMIT(OBOW, 0);
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break;
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case '>':
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EMIT(OEOW, 0);
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break;
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default:
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ordinary(p, wc);
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break;
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}
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break;
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case '{': /* okay as ordinary except if digit follows */
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(void)REQUIRE(!MORE() || !isdigit((uch)PEEK()), REG_BADRPT);
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/* FALLTHROUGH */
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@ -569,6 +579,12 @@ p_simp_re(struct parse *p,
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case '[':
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p_bracket(p);
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break;
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case BACKSL|'<':
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EMIT(OBOW, 0);
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break;
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case BACKSL|'>':
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EMIT(OEOW, 0);
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break;
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case BACKSL|'{':
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SETERROR(REG_BADRPT);
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break;
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@ -58,7 +58,7 @@
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* in the range 5 to 9.
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*/
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#undef __FreeBSD_version
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#define __FreeBSD_version 1100024 /* Master, propagated to newvers */
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#define __FreeBSD_version 1100025 /* Master, propagated to newvers */
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/*
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* __FreeBSD_kernel__ indicates that this system uses the kernel of FreeBSD,
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