Manual: grepc_c

grepc_c(1)					   General Commands Manual					  grepc_c(1)

NAME
       grepc_c - print PCRE patterns for searching C code

SYNOPSIS
       grepc_c [option ...] pattern

DESCRIPTION
       grepc_c(1) is a driver for grepc(1).  It prints PCRE patterns that grepc(1) will use to search for declarations, def‐
       initions, and/or uses of pattern in C source code.

       pattern	is a PCRE pattern.  It normally represents a C identifier, and word boundaries are implicitly added to it in
       most cases.

   Types of code
       This program can produce PCRE pattern for several types of code.	 The following arguments can be passed to the -t op‐
       tion to select the types of code that will be searched.

       e      enum constant definitions.

       f      Function prototypes and definitions.  This can be further subdivided into:

	      fp     Function prototypes.

	      fd     Function definitions.

	      fl     Linux kernel system calls.	 This can be further subdivided into:

		     flp    Linux kernel system call prototypes.

		     fld    Linux kernel system call definitions.

	      fg     glibc internal names of libc functions.  This can be further subdivided into:

		     fgp    glibc prototypes.

		     fgd    glibc definitions.

       m      Macro definitions.

	      mf     Function-like macro definitions.

	      mo     Other macro definitions.

       t      Type definitions.

       u      Uses.  Searches occurences of pattern within enums, function bodies, macro replacements, and type definitions,
	      and prints the whole enum, function, macro, and/or type definitions.  In this case there are  no	word  bound‐
	      aries  set by default, so if pattern is open, fopen will also be found; that's to allow searching for patterns
	      containing any sequence of characters.

	      This can be further subdivided into:

	      ue     Uses within enum definitions (except as an enum constant).

	      uf     Uses within function definition bodies.

	      um     Uses within macro replacements.

	      ut     Uses within type definitions (except enum; that is: typedef, struct, or union).

OPTIONS
       -t type
	      Restrict the search to a specific type of code (see Types of code under  DESCRIPTION).   This  option  can  be
	      passed multiple times to search for various types of code.  Default: e f m t.

EXAMPLES
       alx@devuan:~$ grepc_c -tm alignof;
       (?s)^[ \t]*#\s*define\s[\s\\]*alignof\(.*?[^\\]$
       (?s)^[ \t]*#\s*define\s[\s\\]*alignof\b(?!\().*?(?grepc(1), pcre2grep(1), pcre2syntax(3), pcre2pattern(3)

Linux man-pages 6.17					 2026-01-06						  grepc_c(1)