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RE_COMP(3)	       FreeBSD Library Functions Manual		    RE_COMP(3)

NAME
     re_comp, re_exec -- regular expression handler

LIBRARY
     Compatibility Library (libcompat, -lcompat)

SYNOPSIS
     #include <unistd.h>

     char *
     re_comp(const char	*s);

     int
     re_exec(const char	*s);

DESCRIPTION
     This interface is made obsolete by	regex(3).

     The re_comp() function compiles a string into an internal form suitable
     for pattern matching.  The	re_exec() function checks the argument string
     against the last string passed to re_comp().

     The re_comp() function returns 0 if the string s was compiled success-
     fully; otherwise a	string containing an error message is returned.	 If
     re_comp() is passed 0 or a	null string, it	returns	without	changing the
     currently compiled	regular	expression.

     The re_exec() function returns 1 if the string s matches the last com-
     piled regular expression, 0 if the	string s failed	to match the last com-
     piled regular expression, and -1 if the compiled regular expression was
     invalid (indicating an internal error).

     The strings passed	to both	re_comp() and re_exec()	may have trailing or
     embedded newline characters; they are terminated by NULs.	The regular
     expressions recognized are	described in the manual	entry for ed(1), given
     the above difference.

DIAGNOSTICS
     The re_exec() function returns -1 for an internal error.

     The re_comp() function returns ``no previous regular expression'' or one
     of	the strings generated by regerror(3).

SEE ALSO
     ed(1), egrep(1), ex(1), fgrep(1), grep(1),	regex(3)

HISTORY
     The re_comp() and re_exec() functions appeared in 4.0BSD.

FreeBSD	11.1			 June 4, 1993			  FreeBSD 11.1

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | DIAGNOSTICS | SEE ALSO | HISTORY

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