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minix/usr.bin/pr/pr.c
Thomas Cort 6ea7f916db Importing usr.bin/pr 
Replaces commands/pr. No Minix-specific changes needed.

Change-Id: I3c4c03b38fc8c654e7c54c3a8af0e07a0dfc9f67
2013-10-25 09:05:26 -04:00

1901 lines
36 KiB
C
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/* $NetBSD: pr.c,v 1.24 2012/08/01 02:27:48 ginsbach Exp $ */
/*-
* Copyright (c) 1991 Keith Muller.
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
* Copyright (c) 2012
* The NetBSD Foundation, Inc.
*
* This code is derived from software contributed to Berkeley by
* Keith Muller of the University of California, San Diego.
*
* 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. Neither the name of the University 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 REGENTS 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 REGENTS 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) 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
from: static char sccsid[] = "@(#)pr.c 8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: pr.c,v 1.24 2012/08/01 02:27:48 ginsbach Exp $");
#endif
#endif /* not lint */
#include <sys/types.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <ctype.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <util.h>
#include "pr.h"
#include "extern.h"
/*
* pr: a printing and pagination filter. If multiple input files
* are specified, each is read, formatted, and written to standard
* output. By default, input is separated into 66-line pages, each
* with a header that includes the page number, date, time and the
* files pathname.
*
* Complies with posix P1003.2/D11
*/
/*
* parameter variables
*/
static int pgnm; /* starting page number */
static int clcnt; /* number of columns */
static int colwd; /* column data width - multiple columns */
static int across; /* mult col flag; write across page */
static int dspace; /* double space flag */
static char inchar; /* expand input char */
static int ingap; /* expand input gap */
static int formfeed; /* use formfeed as trailer */
static char *header; /* header name instead of file name */
static char ochar; /* contract output char */
static int ogap; /* contract output gap */
static int lines; /* number of lines per page */
static int merge; /* merge multiple files in output */
static char nmchar; /* line numbering append char */
static int nmwd; /* width of line number field */
static int offst; /* number of page offset spaces */
static int nodiag; /* do not report file open errors */
static char schar; /* text column separation character */
static int sflag; /* -s option for multiple columns */
static int ttyout; /* output is a tty */
static int nohead; /* do not write head and trailer */
static int pgpause; /* pause before each page */
static int pgwd; /* page width with multiple col output */
static const char *timefrmt = TIMEFMT; /* time conversion string */
static FILE *ttyinf; /* input terminal for page pauses */
/*
* misc globals
*/
static FILE *errf; /* error message file pointer */
static int addone; /* page length is odd with double space */
static int errcnt; /* error count on file processing */
static const char digs[] = "0123456789"; /* page number translation map */
static void addnum(char *, int, int);
static void flsh_errs(void);
static int horzcol(int, char **);
static int inln(FILE *, char *, int, int *, int, int *);
static int inskip(FILE *, int, int);
static void mfail(void);
static int mulfile(int, char **);
static FILE *nxtfile(int, char **, const char **, char *, int);
static int onecol(int, char **);
static int otln(char *, int, int *, int *, int);
static void pfail(void);
static int prhead(char *, const char *, int);
static void prpause(int);
static int prtail(int, int);
static int setup(int, char **);
__dead static void terminate(int);
static void usage(void);
static int vertcol(int, char **);
int
main(int argc, char *argv[])
{
int ret_val;
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
(void)signal(SIGINT, terminate);
ret_val = setup(argc, argv);
if (!ret_val) {
/*
* select the output format based on options
*/
if (merge)
ret_val = mulfile(argc, argv);
else if (clcnt == 1)
ret_val = onecol(argc, argv);
else if (across)
ret_val = horzcol(argc, argv);
else
ret_val = vertcol(argc, argv);
} else
usage();
flsh_errs();
if (errcnt || ret_val)
exit(1);
return(0);
}
/*
* onecol: print files with only one column of output.
* Line length is unlimited.
*/
static int
onecol(int argc, char *argv[])
{
int cnt = -1;
int off;
int lrgln;
int linecnt;
int num;
int lncnt;
int pagecnt;
int ips;
int ops;
int cps;
char *obuf = NULL;
char *lbuf;
char *nbuf;
char *hbuf = NULL;
char *ohbuf;
FILE *inf = NULL;
const char *fname;
int mor;
int error = 1;
if (nmwd)
num = nmwd + 1;
else
num = 0;
off = num + offst;
/*
* allocate line buffer
*/
if ((obuf = malloc((unsigned)(LBUF + off)*sizeof(char))) == NULL)
goto oomem;
/*
* allocate header buffer
*/
if ((hbuf = malloc((unsigned)(HDBUF + offst)*sizeof(char))) == NULL)
goto oomem;
ohbuf = hbuf + offst;
nbuf = obuf + offst;
lbuf = nbuf + num;
if (num)
nbuf[--num] = nmchar;
if (offst) {
(void)memset(obuf, (int)' ', offst);
(void)memset(hbuf, (int)' ', offst);
}
/*
* loop by file
*/
while ((inf = nxtfile(argc, argv, &fname, ohbuf, 0)) != NULL) {
if (pgnm) {
/*
* skip to specified page
*/
if (inskip(inf, pgnm, lines))
continue;
pagecnt = pgnm;
} else
pagecnt = 1;
lncnt = 0;
/*
* loop by page
*/
for(;;) {
linecnt = 0;
lrgln = 0;
ops = 0;
ips = 0;
cps = 0;
/*
* loop by line
*/
while (linecnt < lines) {
/*
* input next line
*/
if ((cnt = inln(inf,lbuf,LBUF,&cps,0,&mor)) < 0)
break;
if (!linecnt) {
if (pgpause)
prpause(pagecnt);
if (!nohead &&
prhead(hbuf, fname, pagecnt))
goto out;
}
/*
* start of new line.
*/
if (!lrgln) {
if (num)
addnum(nbuf, num, ++lncnt);
if (otln(obuf,cnt+off, &ips, &ops, mor))
goto out;
} else if (otln(lbuf, cnt, &ips, &ops, mor))
goto out;
/*
* if line bigger than buffer, get more
*/
if (mor) {
lrgln = 1;
continue;
}
/*
* whole line rcvd. reset tab proc. state
*/
++linecnt;
lrgln = 0;
ops = 0;
ips = 0;
}
/*
* fill to end of page
*/
if (linecnt && prtail(lines-linecnt-lrgln, lrgln))
goto out;
/*
* On EOF go to next file
*/
if (cnt < 0)
break;
++pagecnt;
}
if (inf != stdin)
(void)fclose(inf);
}
if (eoptind < argc)
goto out;
error = 0;
goto out;
oomem:
mfail();
out:
free(obuf);
free(hbuf);
if (inf != NULL && inf != stdin)
(void)fclose(inf);
return error;
}
/*
* vertcol: print files with more than one column of output down a page
*/
static int
vertcol(int argc, char *argv[])
{
char *ptbf;
char **lstdat = NULL;
int i;
int j;
int cnt = -1;
int pln;
int *indy = NULL;
int cvc;
int *lindy = NULL;
int lncnt;
int stp;
int pagecnt;
int col = colwd + 1;
int mxlen = pgwd + offst + 1;
int mclcnt = clcnt - 1;
struct vcol *vc = NULL;
int mvc;
int tvc;
int cw = nmwd + 1;
int fullcol;
char *buf = NULL;
char *hbuf = NULL;
char *ohbuf;
const char *fname;
FILE *inf = NULL;
int ips = 0;
int cps = 0;
int ops = 0;
int mor = 0;
int error = 1;
/*
* allocate page buffer
*/
if ((buf = malloc((unsigned)lines*mxlen*sizeof(char))) == NULL)
goto oomem;
/*
* allocate page header
*/
if ((hbuf = malloc((unsigned)(HDBUF + offst)*sizeof(char))) == NULL)
goto oomem;
ohbuf = hbuf + offst;
if (offst)
(void)memset(hbuf, (int)' ', offst);
/*
* col pointers when no headers
*/
mvc = lines * clcnt;
if ((vc = malloc((unsigned)mvc*sizeof(struct vcol))) == NULL)
goto oomem;
/*
* pointer into page where last data per line is located
*/
if ((lstdat = malloc((unsigned)lines*sizeof(char *))) == NULL)
goto oomem;
/*
* fast index lookups to locate start of lines
*/
if ((indy = malloc((unsigned)lines*sizeof(int))) == NULL)
goto oomem;
if ((lindy = malloc((unsigned)lines*sizeof(int))) == NULL)
goto oomem;
if (nmwd)
fullcol = col + cw;
else
fullcol = col;
/*
* initialize buffer lookup indexes and offset area
*/
for (j = 0; j < lines; ++j) {
lindy[j] = j * mxlen;
indy[j] = lindy[j] + offst;
if (offst) {
ptbf = buf + lindy[j];
(void)memset(ptbf, (int)' ', offst);
ptbf += offst;
} else
ptbf = buf + indy[j];
lstdat[j] = ptbf;
}
/*
* loop by file
*/
while ((inf = nxtfile(argc, argv, &fname, ohbuf, 0)) != NULL) {
if (pgnm) {
/*
* skip to requested page
*/
if (inskip(inf, pgnm, lines))
continue;
pagecnt = pgnm;
} else
pagecnt = 1;
lncnt = 0;
/*
* loop by page
*/
for(;;) {
/*
* loop by column
*/
cvc = 0;
for (i = 0; i < clcnt; ++i) {
j = 0;
/*
* if last column, do not pad
*/
if (i == mclcnt)
stp = 1;
else
stp = 0;
/*
* loop by line
*/
for(;;) {
/*
* is this first column
*/
if (!i) {
ptbf = buf + indy[j];
lstdat[j] = ptbf;
} else
ptbf = lstdat[j];
vc[cvc].pt = ptbf;
/*
* add number
*/
if (nmwd) {
addnum(ptbf, nmwd, ++lncnt);
ptbf += nmwd;
*ptbf++ = nmchar;
}
/*
* input next line
*/
cnt = inln(inf,ptbf,colwd,&cps,1,&mor);
vc[cvc++].cnt = cnt;
if (cnt < 0)
break;
ptbf += cnt;
/*
* pad all but last column on page
*/
if (!stp) {
/*
* pad to end of column
*/
if (sflag)
*ptbf++ = schar;
else if ((pln = col-cnt) > 0) {
(void)memset(ptbf,
(int)' ',pln);
ptbf += pln;
}
}
/*
* remember last char in line
*/
lstdat[j] = ptbf;
if (++j >= lines)
break;
}
if (cnt < 0)
break;
}
/*
* when -t (no header) is specified the spec requires
* the min number of lines. The last page may not have
* balanced length columns. To fix this we must reorder
* the columns. This is a very slow technique so it is
* only used under limited conditions. Without -t, the
* balancing of text columns is unspecified. To NOT
* balance the last page, add the global variable
* nohead to the if statement below e.g.
*
* if ((cnt < 0) && nohead && cvc ......
*/
--cvc;
/*
* check to see if last page needs to be reordered
*/
if ((cnt < 0) && cvc && ((mvc-cvc) >= clcnt)){
pln = cvc/clcnt;
if (cvc % clcnt)
++pln;
if (pgpause)
prpause(pagecnt);
/*
* print header
*/
if (!nohead && prhead(hbuf, fname, pagecnt))
goto out;
for (i = 0; i < pln; ++i) {
ips = 0;
ops = 0;
if (offst&& otln(buf,offst,&ips,&ops,1)) {
error = 1;
goto out;
}
tvc = i;
for (j = 0; j < clcnt; ++j) {
/*
* determine column length
*/
if (j == mclcnt) {
/*
* last column
*/
cnt = vc[tvc].cnt;
if (nmwd)
cnt += cw;
} else if (sflag) {
/*
* single ch between
*/
cnt = vc[tvc].cnt + 1;
if (nmwd)
cnt += cw;
} else
cnt = fullcol;
if (otln(vc[tvc].pt, cnt, &ips,
&ops, 1))
goto out;
tvc += pln;
if (tvc >= cvc)
break;
}
/*
* terminate line
*/
if (otln(buf, 0, &ips, &ops, 0))
goto out;
}
/*
* pad to end of page
*/
if (prtail((lines - pln), 0))
goto out;
/*
* done with output, go to next file
*/
break;
}
/*
* determine how many lines to output
*/
if (i > 0)
pln = lines;
else
pln = j;
/*
* print header
*/
if (pln) {
if (pgpause)
prpause(pagecnt);
if (!nohead && prhead(hbuf, fname, pagecnt))
goto out;
}
/*
* output each line
*/
for (i = 0; i < pln; ++i) {
ptbf = buf + lindy[i];
if ((j = lstdat[i] - ptbf) <= offst)
break;
if (otln(ptbf, j, &ips, &ops, 0))
goto out;
}
/*
* pad to end of page
*/
if (pln && prtail((lines - pln), 0))
goto out;
/*
* if EOF go to next file
*/
if (cnt < 0)
break;
++pagecnt;
}
if (inf != stdin)
(void)fclose(inf);
}
if (eoptind < argc)
goto out;
error = 0;
goto out;
oomem:
mfail();
out:
free(buf);
free(hbuf);
free(vc);
free(lstdat);
free(lindy);
if (inf != NULL && inf != stdin)
(void)fclose(inf);
return error;
}
/*
* horzcol: print files with more than one column of output across a page
*/
static int
horzcol(int argc, char *argv[])
{
char *ptbf;
int pln;
int cnt = -1;
char *lstdat;
int col = colwd + 1;
int j;
int i;
int lncnt;
int pagecnt;
char *buf = NULL;
char *hbuf = NULL;
char *ohbuf;
const char *fname;
FILE *inf = NULL;
int ips = 0;
int cps = 0;
int ops = 0;
int mor = 0;
int error = 1;
if ((buf = malloc((unsigned)(pgwd+offst+1)*sizeof(char))) == NULL)
goto oomem;
/*
* page header
*/
if ((hbuf = malloc((unsigned)(HDBUF + offst)*sizeof(char))) == NULL)
goto oomem;
ohbuf = hbuf + offst;
if (offst) {
(void)memset(buf, (int)' ', offst);
(void)memset(hbuf, (int)' ', offst);
}
/*
* loop by file
*/
while ((inf = nxtfile(argc, argv, &fname, ohbuf, 0)) != NULL) {
if (pgnm) {
if (inskip(inf, pgnm, lines))
continue;
pagecnt = pgnm;
} else
pagecnt = 1;
lncnt = 0;
/*
* loop by page
*/
for(;;) {
/*
* loop by line
*/
for (i = 0; i < lines; ++i) {
ptbf = buf + offst;
lstdat = ptbf;
j = 0;
/*
* loop by col
*/
for(;;) {
if (nmwd) {
/*
* add number to column
*/
addnum(ptbf, nmwd, ++lncnt);
ptbf += nmwd;
*ptbf++ = nmchar;
}
/*
* input line
*/
if ((cnt = inln(inf,ptbf,colwd,&cps,1,
&mor)) < 0)
break;
ptbf += cnt;
lstdat = ptbf;
/*
* if last line skip padding
*/
if (++j >= clcnt)
break;
/*
* pad to end of column
*/
if (sflag)
*ptbf++ = schar;
else if ((pln = col - cnt) > 0) {
(void)memset(ptbf,(int)' ',pln);
ptbf += pln;
}
}
/*
* determine line length
*/
if ((j = lstdat - buf) <= offst)
break;
if (!i) {
if (pgpause)
prpause(pagecnt);
if (!nohead &&
prhead(hbuf, fname, pagecnt))
goto out;
}
/*
* output line
*/
if (otln(buf, j, &ips, &ops, 0))
goto out;
}
/*
* pad to end of page
*/
if (i && prtail(lines-i, 0))
goto out;
/*
* if EOF go to next file
*/
if (cnt < 0)
break;
++pagecnt;
}
if (inf != stdin)
(void)fclose(inf);
}
if (eoptind < argc)
goto out;
error = 0;
goto out;
oomem:
mfail();
out:
free(buf);
free(hbuf);
if (inf != NULL && inf != stdin)
(void)fclose(inf);
return error;
}
/*
* mulfile: print files with more than one column of output and
* more than one file concurrently
*/
static int
mulfile(int argc, char *argv[])
{
char *ptbf;
int j;
int pln;
int cnt;
char *lstdat;
int i;
FILE **fbuf = NULL;
int actf;
int lncnt;
int col;
int pagecnt;
int fproc;
char *buf = NULL;
char *hbuf = NULL;
char *ohbuf;
const char *fname;
int ips = 0;
int cps = 0;
int ops = 0;
int mor = 0;
int error = 1;
/*
* array of FILE *, one for each operand
*/
if ((fbuf = calloc(clcnt, sizeof(FILE *))) == NULL)
goto oomem;
/*
* page header
*/
if ((hbuf = malloc((unsigned)(HDBUF + offst)*sizeof(char))) == NULL)
goto oomem;
ohbuf = hbuf + offst;
/*
* do not know how many columns yet. The number of operands provide an
* upper bound on the number of columns. We use the number of files
* we can open successfully to set the number of columns. The operation
* of the merge operation (-m) in relation to unsuccesful file opens
* is unspecified by posix.
*/
j = 0;
while (j < clcnt) {
if ((fbuf[j] = nxtfile(argc, argv, &fname, ohbuf, 1)) == NULL)
break;
if (pgnm && (inskip(fbuf[j], pgnm, lines)))
fbuf[j] = NULL;
++j;
}
/*
* if no files, exit
*/
if (!j)
goto out;
/*
* calculate page boundries based on open file count
*/
clcnt = j;
if (nmwd) {
colwd = (pgwd - clcnt - nmwd)/clcnt;
pgwd = ((colwd + 1) * clcnt) - nmwd - 2;
} else {
colwd = (pgwd + 1 - clcnt)/clcnt;
pgwd = ((colwd + 1) * clcnt) - 1;
}
if (colwd < 1) {
(void)fprintf(errf,
"pr: page width too small for %d columns\n", clcnt);
goto out;
}
actf = clcnt;
col = colwd + 1;
/*
* line buffer
*/
if ((buf = malloc((unsigned)(pgwd+offst+1)*sizeof(char))) == NULL)
goto out;
if (offst) {
(void)memset(buf, (int)' ', offst);
(void)memset(hbuf, (int)' ', offst);
}
if (pgnm)
pagecnt = pgnm;
else
pagecnt = 1;
lncnt = 0;
/*
* continue to loop while any file still has data
*/
while (actf > 0) {
/*
* loop by line
*/
for (i = 0; i < lines; ++i) {
ptbf = buf + offst;
lstdat = ptbf;
if (nmwd) {
/*
* add line number to line
*/
addnum(ptbf, nmwd, ++lncnt);
ptbf += nmwd;
*ptbf++ = nmchar;
}
j = 0;
fproc = 0;
/*
* loop by column
*/
for (j = 0; j < clcnt; ++j) {
if (fbuf[j] == NULL) {
/*
* empty column; EOF
*/
cnt = 0;
} else if ((cnt = inln(fbuf[j], ptbf, colwd,
&cps, 1, &mor)) < 0) {
/*
* EOF hit; no data
*/
if (fbuf[j] != stdin)
(void)fclose(fbuf[j]);
fbuf[j] = NULL;
--actf;
cnt = 0;
} else {
/*
* process file data
*/
ptbf += cnt;
lstdat = ptbf;
fproc++;
}
/*
* if last ACTIVE column, done with line
*/
if (fproc >= actf)
break;
/*
* pad to end of column
*/
if (sflag) {
*ptbf++ = schar;
} else if ((pln = col - cnt) > 0) {
(void)memset(ptbf, (int)' ', pln);
ptbf += pln;
}
}
/*
* calculate data in line
*/
if ((j = lstdat - buf) <= offst)
break;
if (!i) {
if (pgpause)
prpause(pagecnt);
if (!nohead && prhead(hbuf, fname, pagecnt))
goto out;
}
/*
* output line
*/
if (otln(buf, j, &ips, &ops, 0))
goto out;
/*
* if no more active files, done
*/
if (actf <= 0) {
++i;
break;
}
}
/*
* pad to end of page
*/
if (i && prtail(lines-i, 0))
goto out;
++pagecnt;
}
if (eoptind < argc)
goto out;
error = 0;
goto out;
oomem:
mfail();
out:
if (fbuf) {
for (j = 0; j < clcnt; j++)
if (fbuf[j] && fbuf[j] != stdin)
(void)fclose(fbuf[j]);
free(fbuf);
}
free(hbuf);
free(buf);
return error;
}
/*
* inln(): input a line of data (unlimited length lines supported)
* Input is optionally expanded to spaces
*
* inf: file
* buf: buffer
* lim: buffer length
* cps: column positon 1st char in buffer (large line support)
* trnc: throw away data more than lim up to \n
* mor: set if more data in line (not truncated)
*/
static int
inln(FILE *inf, char *buf, int lim, int *cps, int trnc, int *mor)
{
int col;
int gap = ingap;
int ch = EOF;
char *ptbuf;
int chk = (int)inchar;
ptbuf = buf;
if (gap) {
/*
* expanding input option
*/
while ((--lim >= 0) && ((ch = getc(inf)) != EOF)) {
/*
* is this the input "tab" char
*/
if (ch == chk) {
/*
* expand to number of spaces
*/
col = (ptbuf - buf) + *cps;
col = gap - (col % gap);
/*
* if more than this line, push back
*/
if ((col > lim) && (ungetc(ch, inf) == EOF))
return(1);
/*
* expand to spaces
*/
while ((--col >= 0) && (--lim >= 0))
*ptbuf++ = ' ';
continue;
}
if (ch == '\n')
break;
*ptbuf++ = ch;
}
} else {
/*
* no expansion
*/
while ((--lim >= 0) && ((ch = getc(inf)) != EOF)) {
if (ch == '\n')
break;
*ptbuf++ = ch;
}
}
col = ptbuf - buf;
if (ch == EOF) {
*mor = 0;
*cps = 0;
if (!col)
return(-1);
return(col);
}
if (ch == '\n') {
/*
* entire line processed
*/
*mor = 0;
*cps = 0;
return(col);
}
/*
* line was larger than limit
*/
if (trnc) {
/*
* throw away rest of line
*/
while ((ch = getc(inf)) != EOF) {
if (ch == '\n')
break;
}
*cps = 0;
*mor = 0;
} else {
/*
* save column offset if not truncated
*/
*cps += col;
*mor = 1;
}
return(col);
}
/*
* otln(): output a line of data. (Supports unlimited length lines)
* output is optionally contracted to tabs
*
* buf: output buffer with data
* cnt: number of chars of valid data in buf
* svips: buffer input column position (for large lines)
* svops: buffer output column position (for large lines)
* mor: output line not complete in this buf; more data to come.
* 1 is more, 0 is complete, -1 is no \n's
*/
static int
otln(char *buf, int cnt, int *svips, int *svops, int mor)
{
int ops; /* last col output */
int ips; /* last col in buf examined */
int gap = ogap;
int tbps;
char *endbuf;
if (ogap) {
/*
* contracting on output
*/
endbuf = buf + cnt;
ops = *svops;
ips = *svips;
while (buf < endbuf) {
/*
* count number of spaces and ochar in buffer
*/
if (*buf == ' ') {
++ips;
++buf;
continue;
}
/*
* simulate ochar processing
*/
if (*buf == ochar) {
ips += gap - (ips % gap);
++buf;
continue;
}
/*
* got a non space char; contract out spaces
*/
while (ips - ops > 1) {
/*
* use as many ochar as will fit
*/
if ((tbps = ops + gap - (ops % gap)) > ips)
break;
if (putchar(ochar) == EOF) {
pfail();
return(1);
}
ops = tbps;
}
while (ops < ips) {
/*
* finish off with spaces
*/
if (putchar(' ') == EOF) {
pfail();
return(1);
}
++ops;
}
/*
* output non space char
*/
if (putchar(*buf++) == EOF) {
pfail();
return(1);
}
++ips;
++ops;
}
if (mor > 0) {
/*
* if incomplete line, save position counts
*/
*svops = ops;
*svips = ips;
return(0);
}
if (mor < 0) {
while (ips - ops > 1) {
/*
* use as many ochar as will fit
*/
if ((tbps = ops + gap - (ops % gap)) > ips)
break;
if (putchar(ochar) == EOF) {
pfail();
return(1);
}
ops = tbps;
}
while (ops < ips) {
/*
* finish off with spaces
*/
if (putchar(' ') == EOF) {
pfail();
return(1);
}
++ops;
}
return(0);
}
} else {
/*
* output is not contracted
*/
if (cnt && (fwrite(buf, sizeof(char), cnt, stdout) <= 0)) {
pfail();
return(1);
}
if (mor != 0)
return(0);
}
/*
* process line end and double space as required
*/
if ((putchar('\n') == EOF) || (dspace && (putchar('\n') == EOF))) {
pfail();
return(1);
}
return(0);
}
/*
* inskip(): skip over pgcnt pages with lncnt lines per page
* file is closed at EOF (if not stdin).
*
* inf FILE * to read from
* pgcnt number of pages to skip
* lncnt number of lines per page
*/
static int
inskip(FILE *inf, int pgcnt, int lncnt)
{
int c;
int cnt;
while(--pgcnt > 0) {
cnt = lncnt;
while ((c = getc(inf)) != EOF) {
if ((c == '\n') && (--cnt == 0))
break;
}
if (c == EOF) {
if (inf != stdin)
(void)fclose(inf);
return(1);
}
}
return(0);
}
/*
* nxtfile: returns a FILE * to next file in arg list and sets the
* time field for this file (or current date).
*
* buf array to store proper date for the header.
* dt if set skips the date processing (used with -m)
*/
static FILE *
nxtfile(int argc, char **argv, const char **fname, char *buf, int dt)
{
FILE *inf = NULL;
struct timeval tv;
struct timezone tz;
struct tm *timeptr = NULL;
struct stat statbuf;
time_t curtime;
static int twice = -1;
++twice;
if (eoptind >= argc) {
/*
* no file listed; default, use standard input
*/
if (twice)
return(NULL);
clearerr(stdin);
inf = stdin;
if (header != NULL)
*fname = header;
else
*fname = FNAME;
if (nohead)
return(inf);
if (gettimeofday(&tv, &tz) < 0) {
++errcnt;
(void)fprintf(errf, "pr: cannot get time of day, %s\n",
strerror(errno));
eoptind = argc - 1;
return(NULL);
}
curtime = tv.tv_sec;
timeptr = localtime(&curtime);
}
for (; eoptind < argc; ++eoptind) {
if (strcmp(argv[eoptind], "-") == 0) {
/*
* process a "-" for filename
*/
clearerr(stdin);
inf = stdin;
if (header != NULL)
*fname = header;
else
*fname = FNAME;
++eoptind;
if (nohead || (dt && twice))
return(inf);
if (gettimeofday(&tv, &tz) < 0) {
++errcnt;
(void)fprintf(errf,
"pr: cannot get time of day, %s\n",
strerror(errno));
return(NULL);
}
curtime = tv.tv_sec;
timeptr = localtime(&curtime);
} else {
/*
* normal file processing
*/
if ((inf = fopen(argv[eoptind], "r")) == NULL) {
++errcnt;
if (nodiag)
continue;
(void)fprintf(errf, "pr: Cannot open %s, %s\n",
argv[eoptind], strerror(errno));
continue;
}
if (header != NULL)
*fname = header;
else if (dt)
*fname = FNAME;
else
*fname = argv[eoptind];
++eoptind;
if (nohead || (dt && twice))
return(inf);
if (dt) {
if (gettimeofday(&tv, &tz) < 0) {
++errcnt;
(void)fprintf(errf,
"pr: cannot get time of day, %s\n",
strerror(errno));
return(NULL);
}
curtime = tv.tv_sec;
timeptr = localtime(&curtime);
} else {
if (fstat(fileno(inf), &statbuf) < 0) {
++errcnt;
(void)fclose(inf);
(void)fprintf(errf,
"pr: Cannot stat %s, %s\n",
argv[eoptind], strerror(errno));
return(NULL);
}
timeptr = localtime(&(statbuf.st_mtime));
}
}
break;
}
if (inf == NULL)
return(NULL);
/*
* set up time field used in header
*/
if (strftime(buf, HDBUF, timefrmt, timeptr) <= 0) {
++errcnt;
if (inf != stdin)
(void)fclose(inf);
(void)fputs("pr: time conversion failed\n", errf);
return(NULL);
}
return(inf);
}
/*
* addnum(): adds the line number to the column
* Truncates from the front or pads with spaces as required.
* Numbers are right justified.
*
* buf buffer to store the number
* wdth width of buffer to fill
* line line number
*
* NOTE: numbers occupy part of the column. The posix
* spec does not specify if -i processing should or should not
* occur on number padding. The spec does say it occupies
* part of the column. The usage of addnum currently treats
* numbers as part of the column so spaces may be replaced.
*/
void
addnum(char *buf, int wdth, int line)
{
char *pt = buf + wdth;
do {
*--pt = digs[line % 10];
line /= 10;
} while (line && (pt > buf));
/*
* pad with space as required
*/
while (pt > buf)
*--pt = ' ';
}
/*
* prpause(): pause before printing each page
*
* pagcnt page number
*/
static void
prpause(int pagcnt)
{
if (ttyout) {
int c;
(void)putc('\a', stderr);
(void)fflush(stderr);
while ((c = getc(ttyinf)) != '\n' && c != EOF)
;
/*
* pause ONLY before first page of first file
*/
if (pgpause == FIRSTPAGE && pagcnt == 1)
pgpause = NO_PAUSE;
}
}
/*
* prhead(): prints the top of page header
*
* buf buffer with time field (and offset)
* cnt number of chars in buf
* fname fname field for header
* pagcnt page number
*/
static int
prhead(char *buf, const char *fname, int pagcnt)
{
int ips = 0;
int ops = 0;
if ((putchar('\n') == EOF) || (putchar('\n') == EOF)) {
pfail();
return(1);
}
/*
* posix is not clear if the header is subject to line length
* restrictions. The specification for header line format
* in the spec clearly does not limit length. No pr currently
* restricts header length. However if we need to truncate in
* an reasonable way, adjust the length of the printf by
* changing HDFMT to allow a length max as an argument printf.
* buf (which contains the offset spaces and time field could
* also be trimmed
*
* note only the offset (if any) is processed for tab expansion
*/
if (offst && otln(buf, offst, &ips, &ops, -1))
return(1);
(void)printf(HDFMT,buf+offst, fname, pagcnt);
return(0);
}
/*
* prtail(): pad page with empty lines (if required) and print page trailer
* if requested
*
* cnt number of lines of padding needed
* incomp was a '\n' missing from last line output
*/
static int
prtail(int cnt, int incomp)
{
if (nohead) {
/*
* only pad with no headers when incomplete last line
*/
if (!incomp)
return(0);
if ((dspace && (putchar('\n') == EOF)) ||
(putchar('\n') == EOF)) {
pfail();
return(1);
}
return(0);
}
/*
* if double space output two \n
*/
if (dspace)
cnt *= 2;
/*
* if an odd number of lines per page, add an extra \n
*/
if (addone)
++cnt;
/*
* pad page
*/
if (formfeed) {
if ((incomp && (putchar('\n') == EOF)) ||
(putchar('\f') == EOF)) {
pfail();
return(1);
}
return(0);
}
cnt += TAILLEN;
while (--cnt >= 0) {
if (putchar('\n') == EOF) {
pfail();
return(1);
}
}
return(0);
}
/*
* terminate(): when a SIGINT is recvd
*/
static void
terminate(int which_sig)
{
flsh_errs();
(void)raise_default_signal(which_sig);
exit(1);
}
/*
* flsh_errs(): output saved up diagnostic messages after all normal
* processing has completed
*/
static void
flsh_errs(void)
{
char buf[BUFSIZ];
(void)fflush(stdout);
(void)fflush(errf);
if (errf == stderr)
return;
rewind(errf);
while (fgets(buf, BUFSIZ, errf) != NULL)
(void)fputs(buf, stderr);
}
static void
mfail(void)
{
(void)fputs("pr: memory allocation failed\n", errf);
}
static void
pfail(void)
{
(void)fprintf(errf, "pr: write failure, %s\n", strerror(errno));
}
static void
usage(void)
{
(void)fputs(
"usage: pr [+page] [-col] [-adFfmprt] [-e[ch][gap]] [-h header]\n",
errf);
(void)fputs(
" [-i[ch][gap]] [-l line] [-n[ch][width]] [-o offset]\n",
errf);
(void)fputs(
" [-s[ch]] [-T timefmt] [-w width] [-] [file ...]\n",
errf);
}
/*
* setup: Validate command args, initialize and perform sanity
* checks on options
*/
static int
setup(int argc, char **argv)
{
int c;
int eflag = 0;
int iflag = 0;
int wflag = 0;
int cflag = 0;
ttyinf = stdin;
if (isatty(fileno(stdout))) {
/*
* defer diagnostics until processing is done
*/
if ((errf = tmpfile()) == NULL) {
(void)fputs("Cannot defer diagnostic messages\n",stderr);
return(1);
}
ttyout = 1;
} else
errf = stderr;
while ((c = egetopt(argc, argv, "#adFfmrte?h:i?l:n?o:ps?T:w:")) != -1) {
switch (c) {
case '+':
if ((pgnm = atoi(eoptarg)) < 1) {
(void)fputs("pr: +page number must be 1 or more\n",
errf);
return(1);
}
break;
case '-':
if ((clcnt = atoi(eoptarg)) < 1) {
(void)fputs("pr: -columns must be 1 or more\n",errf);
return(1);
}
if (clcnt > 1)
++cflag;
break;
case 'a':
++across;
break;
case 'd':
++dspace;
break;
case 'e':
++eflag;
if ((eoptarg != NULL) &&
!isdigit((unsigned char)*eoptarg))
inchar = *eoptarg++;
else
inchar = INCHAR;
if ((eoptarg != NULL) &&
isdigit((unsigned char)*eoptarg)) {
if ((ingap = atoi(eoptarg)) < 0) {
(void)fputs(
"pr: -e gap must be 0 or more\n", errf);
return(1);
}
if (ingap == 0)
ingap = INGAP;
} else if ((eoptarg != NULL) && (*eoptarg != '\0')) {
(void)fprintf(errf,
"pr: invalid value for -e %s\n", eoptarg);
return(1);
} else
ingap = INGAP;
break;
case 'f':
pgpause |= FIRSTPAGE;
/*FALLTHROUGH*/
case 'F':
++formfeed;
break;
case 'h':
header = eoptarg;
break;
case 'i':
++iflag;
if ((eoptarg != NULL) &&
!isdigit((unsigned char)*eoptarg))
ochar = *eoptarg++;
else
ochar = OCHAR;
if ((eoptarg != NULL) &&
isdigit((unsigned char)*eoptarg)) {
if ((ogap = atoi(eoptarg)) < 0) {
(void)fputs(
"pr: -i gap must be 0 or more\n", errf);
return(1);
}
if (ogap == 0)
ogap = OGAP;
} else if ((eoptarg != NULL) && (*eoptarg != '\0')) {
(void)fprintf(errf,
"pr: invalid value for -i %s\n", eoptarg);
return(1);
} else
ogap = OGAP;
break;
case 'l':
if (!isdigit((unsigned char)*eoptarg) ||
((lines=atoi(eoptarg)) < 1)) {
(void)fputs(
"pr: Number of lines must be 1 or more\n",errf);
return(1);
}
break;
case 'm':
++merge;
break;
case 'n':
if ((eoptarg != NULL) &&
!isdigit((unsigned char)*eoptarg))
nmchar = *eoptarg++;
else
nmchar = NMCHAR;
if ((eoptarg != NULL) &&
isdigit((unsigned char)*eoptarg)) {
if ((nmwd = atoi(eoptarg)) < 1) {
(void)fputs(
"pr: -n width must be 1 or more\n",errf);
return(1);
}
} else if ((eoptarg != NULL) && (*eoptarg != '\0')) {
(void)fprintf(errf,
"pr: invalid value for -n %s\n", eoptarg);
return(1);
} else
nmwd = NMWD;
break;
case 'o':
if (!isdigit((unsigned char)*eoptarg) ||
((offst = atoi(eoptarg))< 1)){
(void)fputs("pr: -o offset must be 1 or more\n",
errf);
return(1);
}
break;
case 'p':
pgpause |= EACHPAGE;
break;
case 'r':
++nodiag;
break;
case 's':
++sflag;
if (eoptarg == NULL)
schar = SCHAR;
else
schar = *eoptarg++;
if (eoptarg && *eoptarg != '\0') {
(void)fprintf(errf,
"pr: invalid value for -s %s\n", eoptarg);
return(1);
}
break;
case 'T':
timefrmt = eoptarg;
break;
case 't':
++nohead;
break;
case 'w':
++wflag;
if (!isdigit((unsigned char)*eoptarg) ||
((pgwd = atoi(eoptarg)) < 1)){
(void)fputs(
"pr: -w width must be 1 or more \n",errf);
return(1);
}
break;
case '?':
default:
return(1);
}
}
/*
* default and sanity checks
*/
if (!clcnt) {
if (merge) {
if ((clcnt = argc - eoptind) <= 1) {
clcnt = CLCNT;
merge = 0;
}
} else
clcnt = CLCNT;
}
if (across) {
if (clcnt == 1) {
(void)fputs("pr: -a flag requires multiple columns\n",
errf);
return(1);
}
if (merge) {
(void)fputs("pr: -m cannot be used with -a\n", errf);
return(1);
}
}
if (!wflag) {
if (sflag)
pgwd = SPGWD;
else
pgwd = PGWD;
}
if (cflag || merge) {
if (!eflag) {
inchar = INCHAR;
ingap = INGAP;
}
if (!iflag) {
ochar = OCHAR;
ogap = OGAP;
}
}
if (cflag) {
if (merge) {
(void)fputs(
"pr: -m cannot be used with multiple columns\n", errf);
return(1);
}
if (nmwd) {
colwd = (pgwd + 1 - (clcnt * (nmwd + 2)))/clcnt;
pgwd = ((colwd + nmwd + 2) * clcnt) - 1;
} else {
colwd = (pgwd + 1 - clcnt)/clcnt;
pgwd = ((colwd + 1) * clcnt) - 1;
}
if (colwd < 1) {
(void)fprintf(errf,
"pr: page width is too small for %d columns\n",clcnt);
return(1);
}
}
if (!lines)
lines = LINES;
/*
* make sure long enough for headers. if not disable
*/
if (lines <= HEADLEN + TAILLEN)
++nohead;
else if (!nohead)
lines -= HEADLEN + TAILLEN;
/*
* adjust for double space on odd length pages
*/
if (dspace) {
if (lines == 1)
dspace = 0;
else {
if (lines & 1)
++addone;
lines /= 2;
}
}
/*
* open /dev/tty if we are to pause before each page
* but only if stdout is a terminal and stdin is not a terminal
*/
if (ttyout && pgpause && !isatty(fileno(stdin))) {
if ((ttyinf = fopen("/dev/tty", "r")) == NULL) {
(void)fprintf(errf, "pr: cannot open terminal\n");
return(1);
}
}
return(0);
}
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