Add nl(1)
PR: 27078 Obtained from: NetBSD
This commit is contained in:
Brian Somers
parent
2d96f0b145
commit
f21559815d
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=76273
@ -111,6 +111,7 @@ SUBDIR= apply \
|
||||
newkey \
|
||||
nfsstat \
|
||||
nice \
|
||||
nl \
|
||||
nohup \
|
||||
objformat \
|
||||
opieinfo \
|
||||
|
||||
5
usr.bin/nl/Makefile
Normal file
5
usr.bin/nl/Makefile
Normal file
@ -0,0 +1,5 @@
|
||||
# $FreeBSD$
|
||||
|
||||
PROG= nl
|
||||
|
||||
.include <bsd.prog.mk>
|
||||
242
usr.bin/nl/nl.1
Normal file
242
usr.bin/nl/nl.1
Normal file
@ -0,0 +1,242 @@
|
||||
.\" $FreeBSD$
|
||||
.\"
|
||||
.\" Copyright (c) 1999 The NetBSD Foundation, Inc.
|
||||
.\" All rights reserved.
|
||||
.\"
|
||||
.\" This code is derived from software contributed to The NetBSD Foundation
|
||||
.\" by Klaus Klein.
|
||||
.\"
|
||||
.\" Redistribution and use in source and binary forms, with or without
|
||||
.\" modification, are permitted provided that the following conditions
|
||||
.\" are met:
|
||||
.\" 1. Redistributions of source code must retain the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer.
|
||||
.\" 2. Redistributions in binary form must reproduce the above copyright
|
||||
.\" notice, this list of conditions and the following disclaimer in the
|
||||
.\" documentation and/or other materials provided with the distribution.
|
||||
.\" 3. All advertising materials mentioning features or use of this software
|
||||
.\" must display the following acknowledgement:
|
||||
.\" This product includes software developed by the NetBSD
|
||||
.\" Foundation, Inc. and its contributors.
|
||||
.\" 4. Neither the name of The NetBSD Foundation nor the names of its
|
||||
.\" contributors may be used to endorse or promote products derived
|
||||
.\" from this software without specific prior written permission.
|
||||
.\"
|
||||
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
||||
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
||||
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
||||
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
.\" POSSIBILITY OF SUCH DAMAGE.
|
||||
.\"
|
||||
.Dd February 15, 1999
|
||||
.Dt NL 1
|
||||
.Os
|
||||
.Sh NAME
|
||||
.Nm \&nl
|
||||
.Nd line numbering filter
|
||||
.Sh SYNOPSIS
|
||||
.Nm ""
|
||||
.Op Fl p
|
||||
.Bk -words
|
||||
.Op Fl b Ar type
|
||||
.Ek
|
||||
.Bk -words
|
||||
.Op Fl d Ar delim
|
||||
.Ek
|
||||
.Bk -words
|
||||
.Op Fl f Ar type
|
||||
.Ek
|
||||
.Bk -words
|
||||
.Op Fl h Ar type
|
||||
.Ek
|
||||
.Bk -words
|
||||
.Op Fl i Ar incr
|
||||
.Ek
|
||||
.Bk -words
|
||||
.Op Fl l Ar num
|
||||
.Ek
|
||||
.Bk -words
|
||||
.Op Fl n Ar format
|
||||
.Ek
|
||||
.Bk -words
|
||||
.Op Fl s Ar sep
|
||||
.Ek
|
||||
.Bk -words
|
||||
.Op Fl v Ar startnum
|
||||
.Ek
|
||||
.Bk -words
|
||||
.Op Fl w Ar width
|
||||
.Ek
|
||||
.Op Ar file
|
||||
.Sh DESCRIPTION
|
||||
The
|
||||
.Nm
|
||||
utility reads lines from the named
|
||||
.Ar file
|
||||
or the standard input if the
|
||||
.Ar file
|
||||
argument is ommitted,
|
||||
applies a configurable line numbering filter operation and writes the result
|
||||
to the standard output.
|
||||
.Pp
|
||||
The
|
||||
.Nm
|
||||
utility treats the text it reads in terms of logical pages.
|
||||
Unless specified otherwise, line numbering is reset at the start of each
|
||||
logical page. A logical page consists of a header, a body and a footer
|
||||
section; empty sections are valid. Different line numbering options are
|
||||
independently available for header, body and footer sections.
|
||||
.Pp
|
||||
The starts of logical page sections are signalled by input lines containing
|
||||
nothing but one of the following sequences of delimiter characters:
|
||||
.Pp
|
||||
.Bd -unfilled -offset indent
|
||||
.Bl -column "\e:\e:\e: " "header "
|
||||
.Em "Line Start of"
|
||||
.It \e:\e:\e: header
|
||||
.It \e:\e: body
|
||||
.It \e: footer
|
||||
.El
|
||||
.Ed
|
||||
.Pp
|
||||
If the input does not contain any logical page section signalling directives,
|
||||
the text being read is assumed to consist of a single logical page body.
|
||||
.Pp
|
||||
The following options are available:
|
||||
.Bl -tag -width indent
|
||||
.It Fl b Ar type
|
||||
Specify the logical page body lines to be numbered.
|
||||
Recognized
|
||||
.Ar type
|
||||
arguments are:
|
||||
.Bl -tag -width pstringXX
|
||||
.It a
|
||||
Number all lines.
|
||||
.It t
|
||||
Number only non-empty lines.
|
||||
.It n
|
||||
No line numbering.
|
||||
.It p Ns Ar expr
|
||||
Number only those lines that contain the basic regular expression specified
|
||||
by
|
||||
.Ar expr .
|
||||
.El
|
||||
.Pp
|
||||
The default
|
||||
.Ar type
|
||||
for logical page body lines is t.
|
||||
.It Fl d Ar delim
|
||||
Specify the delimiter characters used to indicate the start of a logical
|
||||
page section in the input file. At most two characters may be specified;
|
||||
if only one character is specified, the first character is replaced and the
|
||||
second character remains unchanged.
|
||||
The default
|
||||
.Ar delim
|
||||
characters are ``\e:''.
|
||||
.It Fl f Ar type
|
||||
Specify the same as
|
||||
.Fl b Ar type
|
||||
except for logical page footer lines.
|
||||
The default
|
||||
.Ar type
|
||||
for logical page footer lines is n.
|
||||
.It Fl h Ar type
|
||||
Specify the same as
|
||||
.Fl b Ar type
|
||||
except for logical page header lines.
|
||||
The default
|
||||
.Ar type
|
||||
for logical page header lines is n.
|
||||
.It Fl i Ar incr
|
||||
Specify the increment value used to number logical page lines.
|
||||
The default
|
||||
.Ar incr
|
||||
value is 1.
|
||||
.It Fl l Ar num
|
||||
If numbering of all lines is specified for the current logical section
|
||||
using the corresponding
|
||||
.Fl b
|
||||
a,
|
||||
.Fl f
|
||||
a
|
||||
or
|
||||
.Fl h
|
||||
a
|
||||
option,
|
||||
specify the number of adjacent blank lines to be considered as one.
|
||||
For example,
|
||||
.Fl l
|
||||
2 results in only the second adjacent blank line being numbered.
|
||||
The default
|
||||
.Ar num
|
||||
value is 1.
|
||||
.It Fl n Ar format
|
||||
Specify the line numbering output format.
|
||||
Recognized
|
||||
.Ar format
|
||||
arguments are:
|
||||
.Bl -tag -width lnXX -compact
|
||||
.It ln
|
||||
Left justified.
|
||||
.It rn
|
||||
Right justified, leading zeros suppressed.
|
||||
.It rz
|
||||
Right justified, leading zeros kept.
|
||||
.El
|
||||
.Pp
|
||||
The default
|
||||
.Ar format
|
||||
is rn.
|
||||
.It Fl p
|
||||
Specify that line numbering should not be restarted at logical page delimiters.
|
||||
.It Fl s Ar sep
|
||||
Specify the characters used in separating the line number and the corresponding
|
||||
text line.
|
||||
The default
|
||||
.Ar sep
|
||||
setting is a single tab character.
|
||||
.It Fl v Ar startnum
|
||||
Specify the initial value used to number logical page lines; see also the
|
||||
description of the
|
||||
.Fl p
|
||||
option.
|
||||
The default
|
||||
.Ar startnum
|
||||
value is 1.
|
||||
.It Fl w Ar width
|
||||
Specify the number of characters to be occupied by the line number;
|
||||
in case the
|
||||
.Ar width
|
||||
is insufficient to hold the line number, it will be truncated to its
|
||||
.Ar width
|
||||
least significant digits.
|
||||
The default
|
||||
.Ar width
|
||||
is 6.
|
||||
.El
|
||||
.Sh EXIT STATUS
|
||||
The
|
||||
.Nm
|
||||
utility exits 0 on success, and >0 if an error occurs.
|
||||
.Sh SEE ALSO
|
||||
.Xr pr 1
|
||||
.Sh STANDARDS
|
||||
The
|
||||
.Nm
|
||||
utility conforms to
|
||||
.St -xpg4.2
|
||||
with the exception of not supporting the intermingling of the
|
||||
.Ar file
|
||||
operand with the options, which the standard considers an obsolscent feature
|
||||
to be removed from a further issue.
|
||||
.Sh HISTORY
|
||||
The
|
||||
.Nm
|
||||
utility first appeared in
|
||||
.At V.2 .
|
||||
444
usr.bin/nl/nl.c
Normal file
444
usr.bin/nl/nl.c
Normal file
@ -0,0 +1,444 @@
|
||||
/* $FreeBSD$ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 1999 The NetBSD Foundation, Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* This code is derived from software contributed to The NetBSD Foundation
|
||||
* by Klaus Klein.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
|
||||
* This product includes software developed by the NetBSD
|
||||
* Foundation, Inc. and its contributors.
|
||||
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
||||
* contributors may be used to endorse or promote products derived
|
||||
* from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
||||
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
||||
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
||||
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#include <sys/cdefs.h>
|
||||
#ifndef lint
|
||||
__COPYRIGHT(
|
||||
"@(#) Copyright (c) 1999\
|
||||
The NetBSD Foundation, Inc. All rights reserved.");
|
||||
__RCSID("$FreeBSD$");
|
||||
#endif
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
#include <errno.h>
|
||||
#include <limits.h>
|
||||
#include <locale.h>
|
||||
#include <regex.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
|
||||
typedef enum {
|
||||
number_all, /* number all lines */
|
||||
number_nonempty, /* number non-empty lines */
|
||||
number_none, /* no line numbering */
|
||||
number_regex /* number lines matching regular expression */
|
||||
} numbering_type;
|
||||
|
||||
struct numbering_property {
|
||||
const char * const name; /* for diagnostics */
|
||||
numbering_type type; /* numbering type */
|
||||
regex_t expr; /* for type == number_regex */
|
||||
};
|
||||
|
||||
/* line numbering formats */
|
||||
#define FORMAT_LN "%-*d" /* left justified, leading zeros suppressed */
|
||||
#define FORMAT_RN "%*d" /* right justified, leading zeros suppressed */
|
||||
#define FORMAT_RZ "%0*d" /* right justified, leading zeros kept */
|
||||
|
||||
#define FOOTER 0
|
||||
#define BODY 1
|
||||
#define HEADER 2
|
||||
#define NP_LAST HEADER
|
||||
|
||||
static struct numbering_property numbering_properties[NP_LAST + 1] = {
|
||||
{ "footer", number_none },
|
||||
{ "body", number_nonempty },
|
||||
{ "header", number_none }
|
||||
};
|
||||
|
||||
#define max(a, b) ((a) > (b) ? (a) : (b))
|
||||
|
||||
/*
|
||||
* Maximum number of characters required for a decimal representation of a
|
||||
* (signed) int; courtesy of tzcode.
|
||||
*/
|
||||
#define INT_STRLEN_MAXIMUM \
|
||||
((sizeof (int) * CHAR_BIT - 1) * 302 / 1000 + 2)
|
||||
|
||||
static void filter __P((void));
|
||||
int main __P((int, char *[]));
|
||||
static void parse_numbering __P((const char *, int));
|
||||
static void usage __P((void));
|
||||
|
||||
/*
|
||||
* Pointer to dynamically allocated input line buffer, and its size.
|
||||
*/
|
||||
static char *buffer;
|
||||
static size_t buffersize;
|
||||
|
||||
/*
|
||||
* Dynamically allocated buffer suitable for string representation of ints.
|
||||
*/
|
||||
static char *intbuffer;
|
||||
|
||||
/*
|
||||
* Configurable parameters.
|
||||
*/
|
||||
/* delimiter characters that indicate the start of a logical page section */
|
||||
static char delim[2] = { '\\', ':' };
|
||||
|
||||
/* line numbering format */
|
||||
static const char *format = FORMAT_RN;
|
||||
|
||||
/* increment value used to number logical page lines */
|
||||
static int incr = 1;
|
||||
|
||||
/* number of adjacent blank lines to be considered (and numbered) as one */
|
||||
static unsigned int nblank = 1;
|
||||
|
||||
/* whether to restart numbering at logical page delimiters */
|
||||
static int restart = 1;
|
||||
|
||||
/* characters used in separating the line number and the corrsp. text line */
|
||||
static const char *sep = "\t";
|
||||
|
||||
/* initial value used to number logical page lines */
|
||||
static int startnum = 1;
|
||||
|
||||
/* number of characters to be used for the line number */
|
||||
/* should be unsigned but required signed by `*' precision conversion */
|
||||
static int width = 6;
|
||||
|
||||
|
||||
int
|
||||
main(argc, argv)
|
||||
int argc;
|
||||
char *argv[];
|
||||
{
|
||||
int c;
|
||||
long val;
|
||||
unsigned long uval;
|
||||
char *ep;
|
||||
size_t intbuffersize;
|
||||
|
||||
(void)setlocale(LC_ALL, "");
|
||||
|
||||
/*
|
||||
* Note: this implementation strictly conforms to the XBD Utility
|
||||
* Syntax Guidelines and does not permit the optional `file' operand
|
||||
* to be intermingled with the options, which is defined in the
|
||||
* XCU specification (Issue 5) but declared an obsolescent feature that
|
||||
* will be removed from a future issue. It shouldn't matter, though.
|
||||
*/
|
||||
while ((c = getopt(argc, argv, "pb:d:f:h:i:l:n:s:v:w:")) != -1) {
|
||||
switch (c) {
|
||||
case 'p':
|
||||
restart = 0;
|
||||
break;
|
||||
case 'b':
|
||||
parse_numbering(optarg, BODY);
|
||||
break;
|
||||
case 'd':
|
||||
if (optarg[0] != '\0')
|
||||
delim[0] = optarg[0];
|
||||
if (optarg[1] != '\0')
|
||||
delim[1] = optarg[1];
|
||||
/* at most two delimiter characters */
|
||||
if (optarg[2] != '\0') {
|
||||
(void)fprintf(stderr,
|
||||
"nl: invalid delim argument -- %s\n",
|
||||
optarg);
|
||||
exit(EXIT_FAILURE);
|
||||
/* NOTREACHED */
|
||||
}
|
||||
break;
|
||||
case 'f':
|
||||
parse_numbering(optarg, FOOTER);
|
||||
break;
|
||||
case 'h':
|
||||
parse_numbering(optarg, HEADER);
|
||||
break;
|
||||
case 'i':
|
||||
errno = 0;
|
||||
val = strtol(optarg, &ep, 10);
|
||||
if ((ep != NULL && *ep != '\0') ||
|
||||
((val == LONG_MIN || val == LONG_MAX) && errno != 0)) {
|
||||
(void)fprintf(stderr,
|
||||
"invalid incr argument -- %s\n", optarg);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
incr = (int)val;
|
||||
break;
|
||||
case 'l':
|
||||
errno = 0;
|
||||
uval = strtoul(optarg, &ep, 10);
|
||||
if ((ep != NULL && *ep != '\0') ||
|
||||
(uval == ULONG_MAX && errno != 0)) {
|
||||
(void)fprintf(stderr,
|
||||
"invalid num argument -- %s\n", optarg);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
nblank = (unsigned int)uval;
|
||||
break;
|
||||
case 'n':
|
||||
if (strcmp(optarg, "ln") == 0) {
|
||||
format = FORMAT_LN;
|
||||
} else if (strcmp(optarg, "rn") == 0) {
|
||||
format = FORMAT_RN;
|
||||
} else if (strcmp(optarg, "rz") == 0) {
|
||||
format = FORMAT_RZ;
|
||||
} else {
|
||||
(void)fprintf(stderr,
|
||||
"nl: illegal format -- %s\n", optarg);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
break;
|
||||
case 's':
|
||||
sep = optarg;
|
||||
break;
|
||||
case 'v':
|
||||
errno = 0;
|
||||
val = strtol(optarg, &ep, 10);
|
||||
if ((ep != NULL && *ep != '\0') ||
|
||||
((val == LONG_MIN || val == LONG_MAX) && errno != 0)) {
|
||||
(void)fprintf(stderr,
|
||||
"invalid startnum value -- %s\n", optarg);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
startnum = (int)val;
|
||||
break;
|
||||
case 'w':
|
||||
errno = 0;
|
||||
val = strtol(optarg, &ep, 10);
|
||||
if ((ep != NULL && *ep != '\0') ||
|
||||
((val == LONG_MIN || val == LONG_MAX) && errno != 0)) {
|
||||
(void)fprintf(stderr,
|
||||
"invalid width value -- %s\n", optarg);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
width = (int)val;
|
||||
if (!(width > 0)) {
|
||||
(void)fprintf(stderr,
|
||||
"nl: width argument must be > 0 -- %d\n",
|
||||
width);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
break;
|
||||
case '?':
|
||||
default:
|
||||
usage();
|
||||
/* NOTREACHED */
|
||||
}
|
||||
}
|
||||
argc -= optind;
|
||||
argv += optind;
|
||||
|
||||
switch (argc) {
|
||||
case 0:
|
||||
break;
|
||||
case 1:
|
||||
if (freopen(argv[0], "r", stdin) == NULL) {
|
||||
perror(argv[0]);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
break;
|
||||
default:
|
||||
usage();
|
||||
/* NOTREACHED */
|
||||
}
|
||||
|
||||
/* Determine the maximum input line length to operate on. */
|
||||
if ((val = sysconf(_SC_LINE_MAX)) == -1) /* ignore errno */
|
||||
val = LINE_MAX;
|
||||
/* Allocate sufficient buffer space (including the terminating NUL). */
|
||||
buffersize = (size_t)val + 1;
|
||||
if ((buffer = malloc(buffersize)) == NULL) {
|
||||
perror("cannot allocate input line buffer");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
/* Allocate a buffer suitable for preformatting line number. */
|
||||
intbuffersize = max(INT_STRLEN_MAXIMUM, width) + 1; /* NUL */
|
||||
if ((intbuffer = malloc(intbuffersize)) == NULL) {
|
||||
perror("cannot allocate preformatting buffer");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
/* Do the work. */
|
||||
filter();
|
||||
|
||||
exit(EXIT_SUCCESS);
|
||||
/* NOTREACHED */
|
||||
}
|
||||
|
||||
static void
|
||||
filter()
|
||||
{
|
||||
int line; /* logical line number */
|
||||
int section; /* logical page section */
|
||||
unsigned int adjblank; /* adjacent blank lines */
|
||||
int consumed; /* intbuffer measurement */
|
||||
int donumber, idx;
|
||||
|
||||
adjblank = 0;
|
||||
line = startnum;
|
||||
section = BODY;
|
||||
#ifdef __GNUC__
|
||||
(void)&donumber; /* avoid bogus `uninitialized' warning */
|
||||
#endif
|
||||
|
||||
while (fgets(buffer, (int)buffersize, stdin) != NULL) {
|
||||
for (idx = FOOTER; idx <= NP_LAST; idx++) {
|
||||
/* Does it look like a delimiter? */
|
||||
if (buffer[2 * idx + 0] == delim[0] &&
|
||||
buffer[2 * idx + 1] == delim[1]) {
|
||||
/* Was this the whole line? */
|
||||
if (buffer[2 * idx + 2] == '\n') {
|
||||
section = idx;
|
||||
adjblank = 0;
|
||||
if (restart)
|
||||
line = startnum;
|
||||
goto nextline;
|
||||
}
|
||||
} else {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
switch (numbering_properties[section].type) {
|
||||
case number_all:
|
||||
/*
|
||||
* Doing this for number_all only is disputable, but
|
||||
* the standard expresses an explicit dependency on
|
||||
* `-b a' etc.
|
||||
*/
|
||||
if (buffer[0] == '\n' && ++adjblank < nblank)
|
||||
donumber = 0;
|
||||
else
|
||||
donumber = 1, adjblank = 0;
|
||||
break;
|
||||
case number_nonempty:
|
||||
donumber = (buffer[0] != '\n');
|
||||
break;
|
||||
case number_none:
|
||||
donumber = 0;
|
||||
break;
|
||||
case number_regex:
|
||||
donumber =
|
||||
(regexec(&numbering_properties[section].expr,
|
||||
buffer, 0, NULL, 0) == 0);
|
||||
break;
|
||||
}
|
||||
|
||||
if (donumber) {
|
||||
/* Note: sprintf() is safe here. */
|
||||
consumed = sprintf(intbuffer, format, width, line);
|
||||
(void)printf("%s",
|
||||
intbuffer + max(0, consumed - width));
|
||||
line += incr;
|
||||
} else {
|
||||
(void)printf("%*s", width, "");
|
||||
}
|
||||
(void)printf("%s%s", sep, buffer);
|
||||
|
||||
if (ferror(stdout)) {
|
||||
perror("output error");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
nextline:
|
||||
;
|
||||
}
|
||||
|
||||
if (ferror(stdin)) {
|
||||
perror("input error");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Various support functions.
|
||||
*/
|
||||
|
||||
static void
|
||||
parse_numbering(argstr, section)
|
||||
const char *argstr;
|
||||
int section;
|
||||
{
|
||||
int error;
|
||||
char errorbuf[NL_TEXTMAX];
|
||||
|
||||
switch (argstr[0]) {
|
||||
case 'a':
|
||||
numbering_properties[section].type = number_all;
|
||||
break;
|
||||
case 'n':
|
||||
numbering_properties[section].type = number_none;
|
||||
break;
|
||||
case 't':
|
||||
numbering_properties[section].type = number_nonempty;
|
||||
break;
|
||||
case 'p':
|
||||
/* If there was a previous expression, throw it away. */
|
||||
if (numbering_properties[section].type == number_regex)
|
||||
regfree(&numbering_properties[section].expr);
|
||||
else
|
||||
numbering_properties[section].type = number_regex;
|
||||
|
||||
/* Compile/validate the supplied regular expression. */
|
||||
if ((error = regcomp(&numbering_properties[section].expr,
|
||||
&argstr[1], REG_NEWLINE|REG_NOSUB)) != 0) {
|
||||
(void)regerror(error,
|
||||
&numbering_properties[section].expr,
|
||||
errorbuf, sizeof (errorbuf));
|
||||
(void)fprintf(stderr,
|
||||
"nl: %s expr: %s -- %s\n",
|
||||
numbering_properties[section].name, errorbuf,
|
||||
&argstr[1]);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
break;
|
||||
default:
|
||||
(void)fprintf(stderr,
|
||||
"nl: illegal %s line numbering type -- %s\n",
|
||||
numbering_properties[section].name, argstr);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
usage()
|
||||
{
|
||||
|
||||
(void)fprintf(stderr, "usage: nl [-p] [-b type] [-d delim] [-f type] \
|
||||
[-h type] [-i incr] [-l num]\n\t[-n format] [-s sep] [-v startnum] [-w width] \
|
||||
[file]\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user