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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/join/join.c	Lines:	0	281	0.0 %
Date:	2016-12-06	Branches:	0	255	0.0 %


/* $OpenBSD: join.c,v 1.27 2015/10/09 01:37:07 deraadt Exp $	*/

/*-
 * Copyright (c) 1991, 1993, 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Steve Hayman of the Computer Science Department, Indiana University,
 * Michiro Hikida and David Goodenough.
 *
 * 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 <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#define MAXIMUM(a, b)	(((a) > (b)) ? (a) : (b))

/*
 * There's a structure per input file which encapsulates the state of the
 * file.  We repeatedly read lines from each file until we've read in all
 * the consecutive lines from the file with a common join field.  Then we
 * compare the set of lines with an equivalent set from the other file.
 */
typedef struct {
	char *line;			/* line */
	u_long linealloc;		/* line allocated count */
	char **fields;			/* line field(s) */
	u_long fieldcnt;		/* line field(s) count */
	u_long fieldalloc;		/* line field(s) allocated count */
	u_long cfieldc;			/* current field count */
	long	 fpos;			/* fpos of start of field */
} LINE;

typedef struct {
	FILE *fp;			/* file descriptor */
	u_long joinf;			/* join field (-1, -2, -j) */
	int unpair;			/* output unpairable lines (-a) */
	u_long number;			/* 1 for file 1, 2 for file 2 */
	LINE *set;			/* set of lines with same field */
	int pushbool;			/* if pushback is set */
	u_long pushback;		/* line on the stack */
	u_long setcnt;			/* set count */
	u_long setalloc;		/* set allocated count */
	u_long setusedc;		/* sets used  */
} INPUT;
INPUT input1 = { NULL, 0, 0, 1, NULL, 0, 0, 0, 0, 0 },
      input2 = { NULL, 0, 0, 2, NULL, 0, 0, 0, 0, 0 };

typedef struct {
	u_long	filenum;	/* file number */
	u_long	fieldno;	/* field number */
} OLIST;
OLIST *olist;			/* output field list */
u_long olistcnt;		/* output field list count */
u_long olistalloc;		/* output field allocated count */

int joinout = 1;		/* show lines with matched join fields (-v) */
int needsep;			/* need separator character */
int spans = 1;			/* span multiple delimiters (-t) */
char *empty;			/* empty field replacement string (-e) */
char *tabchar = " \t";		/* delimiter characters (-t) */

int  cmp(LINE *, u_long, LINE *, u_long);
void fieldarg(char *);
void joinlines(INPUT *, INPUT *);
void obsolete(char **);
void outfield(LINE *, u_long, int);
void outoneline(INPUT *, LINE *);
void outtwoline(INPUT *, LINE *, INPUT *, LINE *);
void slurp(INPUT *);
void slurpit(INPUT *);
void usage(void);

int
main(int argc, char *argv[])
{
	INPUT *F1, *F2;
	int aflag, ch, cval, vflag;
	char *end;

	if (pledge("stdio rpath wpath cpath", NULL) == -1)
		err(1, "pledge");

	F1 = &input1;
	F2 = &input2;

	aflag = vflag = 0;
	obsolete(argv);
	while ((ch = getopt(argc, argv, "\01a:e:j:1:2:o:t:v:")) != -1) {
		switch (ch) {
		case '\01':		/* See comment in obsolete(). */
			aflag = 1;
			F1->unpair = F2->unpair = 1;
			break;
		case '1':
			if ((F1->joinf = strtol(optarg, &end, 10)) < 1)
				errx(1, "-1 option field number less than 1");
			if (*end)
				errx(1, "illegal field number -- %s", optarg);
			--F1->joinf;
			break;
		case '2':
			if ((F2->joinf = strtol(optarg, &end, 10)) < 1)
				errx(1, "-2 option field number less than 1");
			if (*end)
				errx(1, "illegal field number -- %s", optarg);
			--F2->joinf;
			break;
		case 'a':
			aflag = 1;
			switch(strtol(optarg, &end, 10)) {
			case 1:
				F1->unpair = 1;
				break;
			case 2:
				F2->unpair = 1;
				break;
			default:
				errx(1, "-a option file number not 1 or 2");
				break;
			}
			if (*end)
				errx(1, "illegal file number -- %s", optarg);
			break;
		case 'e':
			empty = optarg;
			break;
		case 'j':
			if ((F1->joinf = F2->joinf = strtol(optarg, &end, 10)) < 1)
				errx(1, "-j option field number less than 1");
			if (*end)
				errx(1, "illegal field number -- %s", optarg);
			--F1->joinf;
			--F2->joinf;
			break;
		case 'o':
			fieldarg(optarg);
			break;
		case 't':
			spans = 0;
			if (strlen(tabchar = optarg) != 1)
				errx(1, "illegal tab character specification");
			break;
		case 'v':
			vflag = 1;
			joinout = 0;
			switch (strtol(optarg, &end, 10)) {
			case 1:
				F1->unpair = 1;
				break;
			case 2:
				F2->unpair = 1;
				break;
			default:
				errx(1, "-v option file number not 1 or 2");
				break;
			}
			if (*end)
				errx(1, "illegal file number -- %s", optarg);
			break;
		case '?':
		default:
			usage();
		}
	}
	argc -= optind;
	argv += optind;

	if (aflag && vflag)
		errx(1, "the -a and -v options are mutually exclusive");

	if (argc != 2)
		usage();

	/* Open the files; "-" means stdin. */
	if (!strcmp(*argv, "-"))
		F1->fp = stdin;
	else if ((F1->fp = fopen(*argv, "r")) == NULL)
		err(1, "%s", *argv);
	++argv;
	if (!strcmp(*argv, "-"))
		F2->fp = stdin;
	else if ((F2->fp = fopen(*argv, "r")) == NULL)
		err(1, "%s", *argv);
	if (F1->fp == stdin && F2->fp == stdin)
		errx(1, "only one input file may be stdin");

	if (pledge("stdio wpath cpath rpath", NULL) == -1)
		err(1, "pledge");

	F1->setusedc = 0;
	F2->setusedc = 0;
	slurp(F1);
	slurp(F2);
	F1->set->cfieldc = 0;
	F2->set->cfieldc = 0;

	/*
	 * We try to let the files have the same field value, advancing
	 * whoever falls behind and always advancing the file(s) we output
	 * from.
	*/
	while (F1->setcnt && F2->setcnt) {
		cval = cmp(F1->set, F1->joinf, F2->set, F2->joinf);
		if (cval == 0) {
			/* Oh joy, oh rapture, oh beauty divine! */
			if (joinout)
				joinlines(F1, F2);
			slurp(F1);
			slurp(F2);
		}
		else {
			if (F1->unpair
			&& (cval < 0 || F2->set->cfieldc == F2->setusedc -1)) {
				joinlines(F1, NULL);
				slurp(F1);
			}
			else if (cval < 0)
				/* File 1 takes the lead... */
				slurp(F1);
			if (F2->unpair
			&& (cval > 0 || F1->set->cfieldc == F1->setusedc -1)) {
				joinlines(F2, NULL);
				slurp(F2);
			}
			else if (cval > 0)
				/* File 2 takes the lead... */
				slurp(F2);
		}
	}

	/*
	 * Now that one of the files is used up, optionally output any
	 * remaining lines from the other file.
	 */
	if (F1->unpair)
		while (F1->setcnt) {
			joinlines(F1, NULL);
			slurp(F1);
		}
	if (F2->unpair)
		while (F2->setcnt) {
			joinlines(F2, NULL);
			slurp(F2);
		}

	return 0;
}

/* wrapper around slurpit() to keep track of what field we are on */
void slurp(INPUT *F)
{
	long fpos;
	u_long cfieldc;

	if (F->set == NULL) {
		fpos = 0;
		cfieldc = 0;
	}
	else {
		fpos = F->set->fpos;
		cfieldc = F->set->cfieldc;
	}
	slurpit(F);
	if (F->set == NULL)
		return;
	else if (fpos != F->set->fpos)
		F->set->cfieldc = cfieldc+1;
}

void
slurpit(INPUT *F)
{
	LINE *lp, *lastlp, tmp;
	size_t len;
	u_long cnt;
	char *bp, *fieldp;
	long fpos;
	/*
	 * Read all of the lines from an input file that have the same
	 * join field.
	 */

	F->setcnt = 0;
	for (lastlp = NULL; ; ++F->setcnt, lastlp = lp) {
		/*
		 * If we're out of space to hold line structures, allocate
		 * more.  Initialize the structure so that we know that this
		 * is new space.
		 */
		if (F->setcnt == F->setalloc) {
			LINE *p;
			u_long newsize = F->setalloc + 50;
			cnt = F->setalloc;
			if ((p = reallocarray(F->set, newsize, sizeof(LINE)))
			    == NULL)
				err(1, NULL);
			F->set = p;
			F->setalloc = newsize;
			memset(F->set + cnt, 0, 50 * sizeof(LINE));
			/* re-set lastlp in case it moved */
			if (lastlp != NULL)
				lastlp = &F->set[F->setcnt - 1];
		}
		/*
		 * Get any pushed back line, else get the next line.  Allocate
		 * space as necessary.  If taking the line from the stack swap
		 * the two structures so that we don't lose space allocated to
		 * either structure.  This could be avoided by doing another
		 * level of indirection, but it's probably okay as is.
		 */
		lp = &F->set[F->setcnt];
		if (F->pushbool) {
			tmp = F->set[F->setcnt];
			F->set[F->setcnt] = F->set[F->pushback];
			F->set[F->pushback] = tmp;
			F->pushbool = 0;
			continue;
		}
		if ((bp = fgetln(F->fp, &len)) == NULL)
			return;
		/*
		 * we depend on knowing on what field we are, one safe way is
		 * the file position.
		*/
		fpos = ftell(F->fp) - len;
		if (lp->linealloc <= len + 1) {
			char *p;
			u_long newsize = lp->linealloc +
			    MAXIMUM(100, len + 1 - lp->linealloc);
			if ((p = realloc(lp->line, newsize)) == NULL)
				err(1, NULL);
			lp->line = p;
			lp->linealloc = newsize;
		}
		F->setusedc++;
		memmove(lp->line, bp, len);
		lp->fpos = fpos;
		/* Replace trailing newline, if it exists. */
		if (bp[len - 1] == '\n')
			lp->line[len - 1] = '\0';
		else
			lp->line[len] = '\0';
		bp = lp->line;

		/* Split the line into fields, allocate space as necessary. */
		lp->fieldcnt = 0;
		while ((fieldp = strsep(&bp, tabchar)) != NULL) {
			if (spans && *fieldp == '\0')
				continue;
			if (lp->fieldcnt == lp->fieldalloc) {
				char **p;
				u_long newsize = lp->fieldalloc + 50;
				if ((p = reallocarray(lp->fields, newsize,
				    sizeof(char *))) == NULL)
					err(1, NULL);
				lp->fields = p;
				lp->fieldalloc = newsize;
			}
			lp->fields[lp->fieldcnt++] = fieldp;
		}

		/* See if the join field value has changed. */
		if (lastlp != NULL && cmp(lp, F->joinf, lastlp, F->joinf)) {
			F->pushbool = 1;
			F->pushback = F->setcnt;
			break;
		}
	}
}

int
cmp(LINE *lp1, u_long fieldno1, LINE *lp2, u_long fieldno2)
{
	if (lp1->fieldcnt <= fieldno1)
		return (-1);
	else if (lp2->fieldcnt <= fieldno2)
		return (1);
	return (strcmp(lp1->fields[fieldno1], lp2->fields[fieldno2]));
}

void
joinlines(INPUT *F1, INPUT *F2)
{
	u_long cnt1, cnt2;

	/*
	 * Output the results of a join comparison.  The output may be from
	 * either file 1 or file 2 (in which case the first argument is the
	 * file from which to output) or from both.
	 */
	if (F2 == NULL) {
		for (cnt1 = 0; cnt1 < F1->setcnt; ++cnt1)
			outoneline(F1, &F1->set[cnt1]);
		return;
	}
	for (cnt1 = 0; cnt1 < F1->setcnt; ++cnt1)
		for (cnt2 = 0; cnt2 < F2->setcnt; ++cnt2)
			outtwoline(F1, &F1->set[cnt1], F2, &F2->set[cnt2]);
}

void
outoneline(INPUT *F, LINE *lp)
{
	u_long cnt;

	/*
	 * Output a single line from one of the files, according to the
	 * join rules.  This happens when we are writing unmatched single
	 * lines.  Output empty fields in the right places.
	 */
	if (olist)
		for (cnt = 0; cnt < olistcnt; ++cnt) {
			if (olist[cnt].filenum == F->number)
				outfield(lp, olist[cnt].fieldno, 0);
			else if (olist[cnt].filenum == 0)
				outfield(lp, F->joinf, 0);
			else
				outfield(lp, 0, 1);
		}
	else {
		/*
		 * Output the join field, then the remaining fields from F
		 */
		outfield(lp, F->joinf, 0);
		for (cnt = 0; cnt < lp->fieldcnt; ++cnt)
			if (F->joinf != cnt)
				outfield(lp, cnt, 0);
	}

	putchar('\n');
	if (ferror(stdout))
		err(1, "stdout");
	needsep = 0;
}

void
outtwoline(INPUT *F1, LINE *lp1, INPUT *F2, LINE *lp2)
{
	u_long cnt;

	/* Output a pair of lines according to the join list (if any). */
	if (olist) {
		for (cnt = 0; cnt < olistcnt; ++cnt)
			if (olist[cnt].filenum == 0) {
				if (lp1->fieldcnt >= F1->joinf)
					outfield(lp1, F1->joinf, 0);
				else
					outfield(lp2, F2->joinf, 0);
			} else if (olist[cnt].filenum == 1)
				outfield(lp1, olist[cnt].fieldno, 0);
			else /* if (olist[cnt].filenum == 2) */
				outfield(lp2, olist[cnt].fieldno, 0);
	} else {
		/*
		 * Output the join field, then the remaining fields from F1
		 * and F2.
		 */
		outfield(lp1, F1->joinf, 0);
		for (cnt = 0; cnt < lp1->fieldcnt; ++cnt)
			if (F1->joinf != cnt)
				outfield(lp1, cnt, 0);
		for (cnt = 0; cnt < lp2->fieldcnt; ++cnt)
			if (F2->joinf != cnt)
				outfield(lp2, cnt, 0);
	}
	putchar('\n');
	if (ferror(stdout))
		err(1, "stdout");
	needsep = 0;
}

void
outfield(LINE *lp, u_long fieldno, int out_empty)
{
	if (needsep++)
		putchar((int)*tabchar);
	if (!ferror(stdout)) {
		if (lp->fieldcnt <= fieldno || out_empty) {
			if (empty != NULL)
				fputs(empty, stdout);
		} else {
			if (*lp->fields[fieldno] == '\0')
				return;
			fputs(lp->fields[fieldno], stdout);
		}
	}
	if (ferror(stdout))
		err(1, "stdout");
}

/*
 * Convert an output list argument "2.1, 1.3, 2.4" into an array of output
 * fields.
 */
void
fieldarg(char *option)
{
	u_long fieldno, filenum;
	char *end, *token;

	while ((token = strsep(&option, ", \t")) != NULL) {
		if (*token == '\0')
			continue;
		if (token[0] == '0')
			filenum = fieldno = 0;
		else if ((token[0] == '1' || token[0] == '2') &&
		    token[1] == '.') {
			filenum = token[0] - '0';
			fieldno = strtol(token + 2, &end, 10);
			if (*end)
				errx(1, "malformed -o option field");
			if (fieldno == 0)
				errx(1, "field numbers are 1 based");
			--fieldno;
		} else
			errx(1, "malformed -o option field");
		if (olistcnt == olistalloc) {
			OLIST *p;
			u_long newsize = olistalloc + 50;
			if ((p = reallocarray(olist, newsize, sizeof(OLIST)))
			    == NULL)
				err(1, NULL);
			olist = p;
			olistalloc = newsize;
		}
		olist[olistcnt].filenum = filenum;
		olist[olistcnt].fieldno = fieldno;
		++olistcnt;
	}
}

void
obsolete(char **argv)
{
	size_t len;
	char **p, *ap, *t;

	while ((ap = *++argv) != NULL) {
		/* Return if "--". */
		if (ap[0] == '-' && ap[1] == '-')
			return;
		/* skip if not an option */
		if (ap[0] != '-')
			continue;
		switch (ap[1]) {
		case 'a':
			/*
			 * The original join allowed "-a", which meant the
			 * same as -a1 plus -a2.  POSIX 1003.2, Draft 11.2
			 * only specifies this as "-a 1" and "a -2", so we
			 * have to use another option flag, one that is
			 * unlikely to ever be used or accidentally entered
			 * on the command line.  (Well, we could reallocate
			 * the argv array, but that hardly seems worthwhile.)
			 */
			if (ap[2] == '\0' && (argv[1] == NULL ||
			    (strcmp(argv[1], "1") != 0 &&
			    strcmp(argv[1], "2") != 0))) {
				ap[1] = '\01';
				warnx("-a option used without an argument; "
				    "reverting to historical behavior");
			}
			break;
		case 'j':
			/*
			 * The original join allowed "-j[12] arg" and "-j arg".
			 * Convert the former to "-[12] arg".  Don't convert
			 * the latter since getopt(3) can handle it.
			 */
			switch(ap[2]) {
			case '1':
			case '2':
				if (ap[3] != '\0')
					goto jbad;
				ap[1] = ap[2];
				ap[2] = '\0';
				break;
			case '\0':
				break;
			default:
jbad:				warnx("unknown option -- %s", ap + 1);
				usage();
			}
			break;
		case 'o':
			/*
			 * The original join allowed "-o arg arg".
			 * Convert to "-o arg -o arg".
			 */
			if (ap[2] != '\0' || argv[1] == NULL)
				break;
			for (p = argv + 2; *p != NULL; ++p) {
				if (p[0][0] == '0' || ((p[0][0] != '1' &&
				    p[0][0] != '2') || p[0][1] != '.'))
					break;
				len = strlen(*p);
				if (len - 2 != strspn(*p + 2, "0123456789"))
					break;
				if ((t = malloc(len + 3)) == NULL)
					err(1, NULL);
				t[0] = '-';
				t[1] = 'o';
				memmove(t + 2, *p, len + 1);
				*p = t;
			}
			argv = p - 1;
			break;
		}
	}
}

void
usage(void)
{
	int len;
	extern char *__progname;

	len = strlen(__progname) + sizeof("usage: ");
	(void)fprintf(stderr, "usage: %s [-1 field] [-2 field] "
	    "[-a file_number | -v file_number] [-e string]\n"
	    "%*s[-o list] [-t char] file1 file2\n",
	    __progname, len, "");
	exit(1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: join.c,v 1.27 2015/10/09 01:37:07 deraadt Exp $ */
2
3			/*-
4			* Copyright (c) 1991, 1993, 1994
5			* The Regents of the University of California. All rights reserved.
6			*
7			* This code is derived from software contributed to Berkeley by
8			* Steve Hayman of the Computer Science Department, Indiana University,
9			* Michiro Hikida and David Goodenough.
10			*
11			* Redistribution and use in source and binary forms, with or without
12			* modification, are permitted provided that the following conditions
13			* are met:
14			* 1. Redistributions of source code must retain the above copyright
15			* notice, this list of conditions and the following disclaimer.
16			* 2. Redistributions in binary form must reproduce the above copyright
17			* notice, this list of conditions and the following disclaimer in the
18			* documentation and/or other materials provided with the distribution.
19			* 3. Neither the name of the University nor the names of its contributors
20			* may be used to endorse or promote products derived from this software
21			* without specific prior written permission.
22			*
23			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33			* SUCH DAMAGE.
34			*/
35
36			#include <err.h>
37			#include <stdio.h>
38			#include <stdlib.h>
39			#include <string.h>
40			#include <unistd.h>
41
42			#define MAXIMUM(a, b) (((a) > (b)) ? (a) : (b))
43
44			/*
45			* There's a structure per input file which encapsulates the state of the
46			* file. We repeatedly read lines from each file until we've read in all
47			* the consecutive lines from the file with a common join field. Then we
48			* compare the set of lines with an equivalent set from the other file.
49			*/
50			typedef struct {
51			char line; / line */
52			u_long linealloc; /* line allocated count */
53			char *fields; / line field(s) */
54			u_long fieldcnt; /* line field(s) count */
55			u_long fieldalloc; /* line field(s) allocated count */
56			u_long cfieldc; /* current field count */
57			long fpos; /* fpos of start of field */
58			} LINE;
59
60			typedef struct {
61			FILE fp; / file descriptor */
62			u_long joinf; /* join field (-1, -2, -j) */
63			int unpair; /* output unpairable lines (-a) */
64			u_long number; /* 1 for file 1, 2 for file 2 */
65			LINE set; / set of lines with same field */
66			int pushbool; /* if pushback is set */
67			u_long pushback; /* line on the stack */
68			u_long setcnt; /* set count */
69			u_long setalloc; /* set allocated count */
70			u_long setusedc; /* sets used */
71			} INPUT;
72			INPUT input1 = { NULL, 0, 0, 1, NULL, 0, 0, 0, 0, 0 },
73			input2 = { NULL, 0, 0, 2, NULL, 0, 0, 0, 0, 0 };
74
75			typedef struct {
76			u_long filenum; /* file number */
77			u_long fieldno; /* field number */
78			} OLIST;
79			OLIST olist; / output field list */
80			u_long olistcnt; /* output field list count */
81			u_long olistalloc; /* output field allocated count */
82
83			int joinout = 1; /* show lines with matched join fields (-v) */
84			int needsep; /* need separator character */
85			int spans = 1; /* span multiple delimiters (-t) */
86			char empty; / empty field replacement string (-e) */
87			char tabchar = " \t"; / delimiter characters (-t) */
88
89			int cmp(LINE , u_long, LINE , u_long);
90			void fieldarg(char *);
91			void joinlines(INPUT , INPUT );
92			void obsolete(char **);
93			void outfield(LINE *, u_long, int);
94			void outoneline(INPUT , LINE );
95			void outtwoline(INPUT , LINE , INPUT , LINE );
96			void slurp(INPUT *);
97			void slurpit(INPUT *);
98			void usage(void);
99
100			int
101			main(int argc, char *argv[])
102			{
103			INPUT F1, F2;
104			int aflag, ch, cval, vflag;
105			char *end;
106
107			if (pledge("stdio rpath wpath cpath", NULL) == -1)
108			err(1, "pledge");
109
110			F1 = &input1;
111			F2 = &input2;
112
113			aflag = vflag = 0;
114			obsolete(argv);
115			while ((ch = getopt(argc, argv, "\01a:e:j:1:2:o:t:v:")) != -1) {
116			switch (ch) {
117			case '\01': /* See comment in obsolete(). */
118			aflag = 1;
119			F1->unpair = F2->unpair = 1;
120			break;
121			case '1':
122			if ((F1->joinf = strtol(optarg, &end, 10)) < 1)
123			errx(1, "-1 option field number less than 1");
124			if (*end)
125			errx(1, "illegal field number -- %s", optarg);
126			--F1->joinf;
127			break;
128			case '2':
129			if ((F2->joinf = strtol(optarg, &end, 10)) < 1)
130			errx(1, "-2 option field number less than 1");
131			if (*end)
132			errx(1, "illegal field number -- %s", optarg);
133			--F2->joinf;
134			break;
135			case 'a':
136			aflag = 1;
137			switch(strtol(optarg, &end, 10)) {
138			case 1:
139			F1->unpair = 1;
140			break;
141			case 2:
142			F2->unpair = 1;
143			break;
144			default:
145			errx(1, "-a option file number not 1 or 2");
146			break;
147			}
148			if (*end)
149			errx(1, "illegal file number -- %s", optarg);
150			break;
151			case 'e':
152			empty = optarg;
153			break;
154			case 'j':
155			if ((F1->joinf = F2->joinf = strtol(optarg, &end, 10)) < 1)
156			errx(1, "-j option field number less than 1");
157			if (*end)
158			errx(1, "illegal field number -- %s", optarg);
159			--F1->joinf;
160			--F2->joinf;
161			break;
162			case 'o':
163			fieldarg(optarg);
164			break;
165			case 't':
166			spans = 0;
167			if (strlen(tabchar = optarg) != 1)
168			errx(1, "illegal tab character specification");
169			break;
170			case 'v':
171			vflag = 1;
172			joinout = 0;
173			switch (strtol(optarg, &end, 10)) {
174			case 1:
175			F1->unpair = 1;
176			break;
177			case 2:
178			F2->unpair = 1;
179			break;
180			default:
181			errx(1, "-v option file number not 1 or 2");
182			break;
183			}
184			if (*end)
185			errx(1, "illegal file number -- %s", optarg);
186			break;
187			case '?':
188			default:
189			usage();
190			}
191			}
192			argc -= optind;
193			argv += optind;
194
195			if (aflag && vflag)
196			errx(1, "the -a and -v options are mutually exclusive");
197
198			if (argc != 2)
199			usage();
200
201			/* Open the files; "-" means stdin. */
202			if (!strcmp(*argv, "-"))
203			F1->fp = stdin;
204			else if ((F1->fp = fopen(*argv, "r")) == NULL)
205			err(1, "%s", *argv);
206			++argv;
207			if (!strcmp(*argv, "-"))
208			F2->fp = stdin;
209			else if ((F2->fp = fopen(*argv, "r")) == NULL)
210			err(1, "%s", *argv);
211			if (F1->fp == stdin && F2->fp == stdin)
212			errx(1, "only one input file may be stdin");
213
214			if (pledge("stdio wpath cpath rpath", NULL) == -1)
215			err(1, "pledge");
216
217			F1->setusedc = 0;
218			F2->setusedc = 0;
219			slurp(F1);
220			slurp(F2);
221			F1->set->cfieldc = 0;
222			F2->set->cfieldc = 0;
223
224			/*
225			* We try to let the files have the same field value, advancing
226			* whoever falls behind and always advancing the file(s) we output
227			* from.
228			*/
229			while (F1->setcnt && F2->setcnt) {
230			cval = cmp(F1->set, F1->joinf, F2->set, F2->joinf);
231			if (cval == 0) {
232			/* Oh joy, oh rapture, oh beauty divine! */
233			if (joinout)
234			joinlines(F1, F2);
235			slurp(F1);
236			slurp(F2);
237			}
238			else {
239			if (F1->unpair
240			&& (cval < 0 \|\| F2->set->cfieldc == F2->setusedc -1)) {
241			joinlines(F1, NULL);
242			slurp(F1);
243			}
244			else if (cval < 0)
245			/* File 1 takes the lead... */
246			slurp(F1);
247			if (F2->unpair
248			&& (cval > 0 \|\| F1->set->cfieldc == F1->setusedc -1)) {
249			joinlines(F2, NULL);
250			slurp(F2);
251			}
252			else if (cval > 0)
253			/* File 2 takes the lead... */
254			slurp(F2);
255			}
256			}
257
258			/*
259			* Now that one of the files is used up, optionally output any
260			* remaining lines from the other file.
261			*/
262			if (F1->unpair)
263			while (F1->setcnt) {
264			joinlines(F1, NULL);
265			slurp(F1);
266			}
267			if (F2->unpair)
268			while (F2->setcnt) {
269			joinlines(F2, NULL);
270			slurp(F2);
271			}
272
273			return 0;
274			}
275
276			/* wrapper around slurpit() to keep track of what field we are on */
277			void slurp(INPUT *F)
278			{
279			long fpos;
280			u_long cfieldc;
281
282			if (F->set == NULL) {
283			fpos = 0;
284			cfieldc = 0;
285			}
286			else {
287			fpos = F->set->fpos;
288			cfieldc = F->set->cfieldc;
289			}
290			slurpit(F);
291			if (F->set == NULL)
292			return;
293			else if (fpos != F->set->fpos)
294			F->set->cfieldc = cfieldc+1;
295			}
296
297			void
298			slurpit(INPUT *F)
299			{
300			LINE lp, lastlp, tmp;
301			size_t len;
302			u_long cnt;
303			char bp, fieldp;
304			long fpos;
305			/*
306			* Read all of the lines from an input file that have the same
307			* join field.
308			*/
309
310			F->setcnt = 0;
311			for (lastlp = NULL; ; ++F->setcnt, lastlp = lp) {
312			/*
313			* If we're out of space to hold line structures, allocate
314			* more. Initialize the structure so that we know that this
315			* is new space.
316			*/
317			if (F->setcnt == F->setalloc) {
318			LINE *p;
319			u_long newsize = F->setalloc + 50;
320			cnt = F->setalloc;
321			if ((p = reallocarray(F->set, newsize, sizeof(LINE)))
322			== NULL)
323			err(1, NULL);
324			F->set = p;
325			F->setalloc = newsize;
326			memset(F->set + cnt, 0, 50 * sizeof(LINE));
327			/* re-set lastlp in case it moved */
328			if (lastlp != NULL)
329			lastlp = &F->set[F->setcnt - 1];
330			}
331			/*
332			* Get any pushed back line, else get the next line. Allocate
333			* space as necessary. If taking the line from the stack swap
334			* the two structures so that we don't lose space allocated to
335			* either structure. This could be avoided by doing another
336			* level of indirection, but it's probably okay as is.
337			*/
338			lp = &F->set[F->setcnt];
339			if (F->pushbool) {
340			tmp = F->set[F->setcnt];
341			F->set[F->setcnt] = F->set[F->pushback];
342			F->set[F->pushback] = tmp;
343			F->pushbool = 0;
344			continue;
345			}
346			if ((bp = fgetln(F->fp, &len)) == NULL)
347			return;
348			/*
349			* we depend on knowing on what field we are, one safe way is
350			* the file position.
351			*/
352			fpos = ftell(F->fp) - len;
353			if (lp->linealloc <= len + 1) {
354			char *p;
355			u_long newsize = lp->linealloc +
356			MAXIMUM(100, len + 1 - lp->linealloc);
357			if ((p = realloc(lp->line, newsize)) == NULL)
358			err(1, NULL);
359			lp->line = p;
360			lp->linealloc = newsize;
361			}
362			F->setusedc++;
363			memmove(lp->line, bp, len);
364			lp->fpos = fpos;
365			/* Replace trailing newline, if it exists. */
366			if (bp[len - 1] == '\n')
367			lp->line[len - 1] = '\0';
368			else
369			lp->line[len] = '\0';
370			bp = lp->line;
371
372			/* Split the line into fields, allocate space as necessary. */
373			lp->fieldcnt = 0;
374			while ((fieldp = strsep(&bp, tabchar)) != NULL) {
375			if (spans && *fieldp == '\0')
376			continue;
377			if (lp->fieldcnt == lp->fieldalloc) {
378			char **p;
379			u_long newsize = lp->fieldalloc + 50;
380			if ((p = reallocarray(lp->fields, newsize,
381			sizeof(char *))) == NULL)
382			err(1, NULL);
383			lp->fields = p;
384			lp->fieldalloc = newsize;
385			}
386			lp->fields[lp->fieldcnt++] = fieldp;
387			}
388
389			/* See if the join field value has changed. */
390			if (lastlp != NULL && cmp(lp, F->joinf, lastlp, F->joinf)) {
391			F->pushbool = 1;
392			F->pushback = F->setcnt;
393			break;
394			}
395			}
396			}
397
398			int
399			cmp(LINE lp1, u_long fieldno1, LINE lp2, u_long fieldno2)
400			{
401			if (lp1->fieldcnt <= fieldno1)
402			return (-1);
403			else if (lp2->fieldcnt <= fieldno2)
404			return (1);
405			return (strcmp(lp1->fields[fieldno1], lp2->fields[fieldno2]));
406			}
407
408			void
409			joinlines(INPUT F1, INPUT F2)
410			{
411			u_long cnt1, cnt2;
412
413			/*
414			* Output the results of a join comparison. The output may be from
415			* either file 1 or file 2 (in which case the first argument is the
416			* file from which to output) or from both.
417			*/
418			if (F2 == NULL) {
419			for (cnt1 = 0; cnt1 < F1->setcnt; ++cnt1)
420			outoneline(F1, &F1->set[cnt1]);
421			return;
422			}
423			for (cnt1 = 0; cnt1 < F1->setcnt; ++cnt1)
424			for (cnt2 = 0; cnt2 < F2->setcnt; ++cnt2)
425			outtwoline(F1, &F1->set[cnt1], F2, &F2->set[cnt2]);
426			}
427
428			void
429			outoneline(INPUT F, LINE lp)
430			{
431			u_long cnt;
432
433			/*
434			* Output a single line from one of the files, according to the
435			* join rules. This happens when we are writing unmatched single
436			* lines. Output empty fields in the right places.
437			*/
438			if (olist)
439			for (cnt = 0; cnt < olistcnt; ++cnt) {
440			if (olist[cnt].filenum == F->number)
441			outfield(lp, olist[cnt].fieldno, 0);
442			else if (olist[cnt].filenum == 0)
443			outfield(lp, F->joinf, 0);
444			else
445			outfield(lp, 0, 1);
446			}
447			else {
448			/*
449			* Output the join field, then the remaining fields from F
450			*/
451			outfield(lp, F->joinf, 0);
452			for (cnt = 0; cnt < lp->fieldcnt; ++cnt)
453			if (F->joinf != cnt)
454			outfield(lp, cnt, 0);
455			}
456
457			putchar('\n');
458			if (ferror(stdout))
459			err(1, "stdout");
460			needsep = 0;
461			}
462
463			void
464			outtwoline(INPUT F1, LINE lp1, INPUT F2, LINE lp2)
465			{
466			u_long cnt;
467
468			/* Output a pair of lines according to the join list (if any). */
469			if (olist) {
470			for (cnt = 0; cnt < olistcnt; ++cnt)
471			if (olist[cnt].filenum == 0) {
472			if (lp1->fieldcnt >= F1->joinf)
473			outfield(lp1, F1->joinf, 0);
474			else
475			outfield(lp2, F2->joinf, 0);
476			} else if (olist[cnt].filenum == 1)
477			outfield(lp1, olist[cnt].fieldno, 0);
478			else /* if (olist[cnt].filenum == 2) */
479			outfield(lp2, olist[cnt].fieldno, 0);
480			} else {
481			/*
482			* Output the join field, then the remaining fields from F1
483			* and F2.
484			*/
485			outfield(lp1, F1->joinf, 0);
486			for (cnt = 0; cnt < lp1->fieldcnt; ++cnt)
487			if (F1->joinf != cnt)
488			outfield(lp1, cnt, 0);
489			for (cnt = 0; cnt < lp2->fieldcnt; ++cnt)
490			if (F2->joinf != cnt)
491			outfield(lp2, cnt, 0);
492			}
493			putchar('\n');
494			if (ferror(stdout))
495			err(1, "stdout");
496			needsep = 0;
497			}
498
499			void
500			outfield(LINE *lp, u_long fieldno, int out_empty)
501			{
502			if (needsep++)
503			putchar((int)*tabchar);
504			if (!ferror(stdout)) {
505			if (lp->fieldcnt <= fieldno \|\| out_empty) {
506			if (empty != NULL)
507			fputs(empty, stdout);
508			} else {
509			if (*lp->fields[fieldno] == '\0')
510			return;
511			fputs(lp->fields[fieldno], stdout);
512			}
513			}
514			if (ferror(stdout))
515			err(1, "stdout");
516			}
517
518			/*
519			* Convert an output list argument "2.1, 1.3, 2.4" into an array of output
520			* fields.
521			*/
522			void
523			fieldarg(char *option)
524			{
525			u_long fieldno, filenum;
526			char end, token;
527
528			while ((token = strsep(&option, ", \t")) != NULL) {
529			if (*token == '\0')
530			continue;
531			if (token[0] == '0')
532			filenum = fieldno = 0;
533			else if ((token[0] == '1' \|\| token[0] == '2') &&
534			token[1] == '.') {
535			filenum = token[0] - '0';
536			fieldno = strtol(token + 2, &end, 10);
537			if (*end)
538			errx(1, "malformed -o option field");
539			if (fieldno == 0)
540			errx(1, "field numbers are 1 based");
541			--fieldno;
542			} else
543			errx(1, "malformed -o option field");
544			if (olistcnt == olistalloc) {
545			OLIST *p;
546			u_long newsize = olistalloc + 50;
547			if ((p = reallocarray(olist, newsize, sizeof(OLIST)))
548			== NULL)
549			err(1, NULL);
550			olist = p;
551			olistalloc = newsize;
552			}
553			olist[olistcnt].filenum = filenum;
554			olist[olistcnt].fieldno = fieldno;
555			++olistcnt;
556			}
557			}
558
559			void
560			obsolete(char **argv)
561			{
562			size_t len;
563			char *p, ap, *t;
564
565			while ((ap = *++argv) != NULL) {
566			/* Return if "--". */
567			if (ap[0] == '-' && ap[1] == '-')
568			return;
569			/* skip if not an option */
570			if (ap[0] != '-')
571			continue;
572			switch (ap[1]) {
573			case 'a':
574			/*
575			* The original join allowed "-a", which meant the
576			* same as -a1 plus -a2. POSIX 1003.2, Draft 11.2
577			* only specifies this as "-a 1" and "a -2", so we
578			* have to use another option flag, one that is
579			* unlikely to ever be used or accidentally entered
580			* on the command line. (Well, we could reallocate
581			* the argv array, but that hardly seems worthwhile.)
582			*/
583			if (ap[2] == '\0' && (argv[1] == NULL \|\|
584			(strcmp(argv[1], "1") != 0 &&
585			strcmp(argv[1], "2") != 0))) {
586			ap[1] = '\01';
587			warnx("-a option used without an argument; "
588			"reverting to historical behavior");
589			}
590			break;
591			case 'j':
592			/*
593			* The original join allowed "-j[12] arg" and "-j arg".
594			* Convert the former to "-[12] arg". Don't convert
595			* the latter since getopt(3) can handle it.
596			*/
597			switch(ap[2]) {
598			case '1':
599			case '2':
600			if (ap[3] != '\0')
601			goto jbad;
602			ap[1] = ap[2];
603			ap[2] = '\0';
604			break;
605			case '\0':
606			break;
607			default:
608			jbad: warnx("unknown option -- %s", ap + 1);
609			usage();
610			}
611			break;
612			case 'o':
613			/*
614			* The original join allowed "-o arg arg".
615			* Convert to "-o arg -o arg".
616			*/
617			if (ap[2] != '\0' \|\| argv[1] == NULL)
618			break;
619			for (p = argv + 2; *p != NULL; ++p) {
620			if (p[0][0] == '0' \|\| ((p[0][0] != '1' &&
621			p[0][0] != '2') \|\| p[0][1] != '.'))
622			break;
623			len = strlen(*p);
624			if (len - 2 != strspn(*p + 2, "0123456789"))
625			break;
626			if ((t = malloc(len + 3)) == NULL)
627			err(1, NULL);
628			t[0] = '-';
629			t[1] = 'o';
630			memmove(t + 2, *p, len + 1);
631			*p = t;
632			}
633			argv = p - 1;
634			break;
635			}
636			}
637			}
638
639			void
640			usage(void)
641			{
642			int len;
643			extern char *__progname;
644
645			len = strlen(__progname) + sizeof("usage: ");
646			(void)fprintf(stderr, "usage: %s [-1 field] [-2 field] "
647			"[-a file_number \| -v file_number] [-e string]\n"
648			"%*s[-o list] [-t char] file1 file2\n",
649			__progname, len, "");
650			exit(1);
651			}