busybox/shell/shell_common.h
Johannes Schindelin 3bef5d89b0 ash: implement -d DELIM option for read
The POSIX standard only requires the read builtin to handle -r:
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/read.html

However, Bash introduced the option -d <DELIM> to override IFS for
just one invocation, and it is quite useful.

It is also super easy to implement in BusyBox' ash, so let's do that.

The motivation: This option is used by Git's test suite.

function                                             old     new   delta
.rodata                                           163505  163587     +82
shell_builtin_read                                  1244    1289     +45
readcmd                                              233     259     +26
builtin_read                                         258     263      +5
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/0 up/down: 158/0)             Total: 158 bytes

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-09 13:52:17 +02:00

55 lines
1.2 KiB
C

/* vi: set sw=4 ts=4: */
/*
* Adapted from ash applet code
*
* This code is derived from software contributed to Berkeley by
* Kenneth Almquist.
*
* Copyright (c) 1989, 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Copyright (c) 1997-2005 Herbert Xu <herbert@gondor.apana.org.au>
* was re-ported from NetBSD and debianized.
*
* Copyright (c) 2010 Denys Vlasenko
* Split from ash.c
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
#ifndef SHELL_COMMON_H
#define SHELL_COMMON_H 1
PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
extern const char defifsvar[] ALIGN1; /* "IFS= \t\n" */
#define defifs (defifsvar + 4)
extern const char defoptindvar[] ALIGN1; /* "OPTIND=1" */
int FAST_FUNC is_well_formed_var_name(const char *s, char terminator);
/* Builtins */
enum {
BUILTIN_READ_SILENT = 1 << 0,
BUILTIN_READ_RAW = 1 << 1,
};
const char* FAST_FUNC
shell_builtin_read(void FAST_FUNC (*setvar)(const char *name, const char *val),
char **argv,
const char *ifs,
int read_flags,
const char *opt_n,
const char *opt_p,
const char *opt_t,
const char *opt_u,
const char *opt_d
);
int FAST_FUNC
shell_builtin_ulimit(char **argv);
POP_SAVED_FUNCTION_VISIBILITY
#endif