man3/re_comp.3

   1 '\" t
   2 .\" Copyright (C), 1995, Graeme W. Wilford. (Wilf.)
   3 .\"
   4 .\" SPDX-License-Identifier: Linux-man-pages-copyleft
   5 .\"
   6 .\" Wed Jun 14 16:10:28 BST 1995 Wilf. (G.Wilford@@ee.surrey.ac.uk)
   7 .\"
   8 .TH re_comp 3 (date) "Linux man-pages (unreleased)"
   9 .SH NAME
  10 re_comp, re_exec \- BSD regex functions
  11 .SH LIBRARY
  12 Standard C library
  13 .RI ( libc ", " \-lc )
  14 .SH SYNOPSIS
  15 .nf
  16 .B #define _REGEX_RE_COMP
  17 .B #include <sys/types.h>
  18 .B #include <regex.h>
  19 .PP
  20 .BI "[[deprecated]] char *re_comp(const char *" regex );
  21 .BI "[[deprecated]] int re_exec(const char *" string );
  22 .fi
  23 .SH DESCRIPTION
  24 .BR re_comp ()
  25 is used to compile the null-terminated regular expression pointed to by
  26 .IR regex .
  27 The compiled pattern occupies a static area, the pattern buffer,
  28 which is overwritten by subsequent use of
  29 .BR re_comp ().
  30 If
  31 .I regex
  32 is NULL,
  33 no operation is performed and the pattern buffer's contents are not
  34 altered.
  35 .PP
  36 .BR re_exec ()
  37 is used to assess whether the null-terminated string pointed to by
  38 .I string
  39 matches the previously compiled
  40 .IR regex .
  41 .SH RETURN VALUE
  42 .BR re_comp ()
  43 returns NULL on successful compilation of
  44 .I regex
  45 otherwise it returns a pointer to an appropriate error message.
  46 .PP
  47 .BR re_exec ()
  48 returns 1 for a successful match, zero for failure.
  49 .SH ATTRIBUTES
  50 For an explanation of the terms used in this section, see
  51 .BR attributes (7).
  52 .TS
  53 allbox;
  54 lbx lb lb
  55 l l l.
  56 Interface       Attribute       Value
  57 T{
  58 .na
  59 .nh
  60 .BR re_comp (),
  61 .BR re_exec ()
  62 T}      Thread safety   MT-Unsafe
  63 .TE
  64 .sp 1
  65 .SH STANDARDS
  66 None.
  67 .SH HISTORY
  68 4.3BSD.
  69 .PP
  70 These functions are obsolete; the functions documented in
  71 .BR regcomp (3)
  72 should be used instead.
  73 .SH SEE ALSO
  74 .BR regcomp (3),
  75 .BR regex (7),
  76 GNU regex manual