cmd/infocmp/infocmp.c

	infocmp.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*  Copyright (c) 1988 AT&T */
/*    All Rights Reserved   */


/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"    /* SVr4.0 1.13  */

/*
    NAME
    infocmp - compare terminfo descriptions, or dump a terminfo
    description

    AUTHOR
    Tony Hansen, February 23, 1984.
*/

#include "curses.h"
#include "term.h"
#include "print.h"
#include <fcntl.h>
#include <stdlib.h>

/* externs from libcurses */
extern char *boolnames[];
extern char *boolcodes[];
extern char *boolfnames[];
extern char *numnames[];
extern char *numcodes[];
extern char *numfnames[];
extern char *strnames[];
extern char *strcodes[];
extern char *strfnames[];
extern char ttytype[];
extern int tgetflag();
extern int tgetnum();
extern char *tgetstr();

/* externs from libc */
extern void exit();
extern void qsort();
extern char *getenv();
extern int getopt();
extern int optind;
extern char *optarg;
extern char *strncpy(), *strcpy();
extern int strcmp(), strlen();

/* data structures for this program */

struct boolstruct {
    char *infoname;         /* the terminfo capability name */
    char *capname;          /* the termcap capability name */
    char *fullname;         /* the long C variable name */
    char *secondname;           /* the use= terminal w/ this value */
    char val;               /* the value */
    char secondval;         /* the value in the use= terminal */
    char changed;           /* a use= terminal changed the value */
    char seenagain;         /* a use= terminal had this entry */
    };

struct numstruct {
    char *infoname;         /* ditto from above */
    char *capname;
    char *fullname;
    char *secondname;
    short val;
    short secondval;
    char changed;
    char seenagain;
    };

struct strstruct {
    char *infoname;         /* ditto from above */
    char *capname;
    char *fullname;
    char *secondname;
    char *val;
    char *secondval;
    char changed;
    char seenagain;
    };

/* globals for this file */
char *progname;         /* argv[0], the name of the program */
static struct boolstruct *ibool; /* array of char information */
static struct numstruct *num;   /* array of number information */
static struct strstruct *str;   /* array of string information */
static char *used;      /* usage statistics */
static int numbools;        /* how many booleans there are */
static int numnums;     /* how many numbers there are */
static int numstrs;     /* how many strings there are */
#define TTYLEN 255
static char *firstterm;     /* the name of the first terminal */
static char *savettytype;   /* the synonyms of the first terminal */
static char _savettytype[TTYLEN+1]; /* the place to save those names */
static int devnull;     /* open("/dev/null") for setupterm */
#define trace stderr        /* send trace messages to stderr */

/* options */
static int verbose = 0;     /* debugging printing level */
static int diff = 0;        /* produce diff listing, the default */
static int common = 0;      /* produce common listing */
static int neither = 0;     /* list caps in neither entry */
static int use = 0;     /* produce use= comparison listing */
static enum printtypes printing /* doing any of above printing at all */
    = pr_none;
enum { none, by_database, by_terminfo, by_longnames, by_cap }
    sortorder = none;       /* sort the fields for printing */
static char *term1info, *term2info; /* $TERMINFO settings */
static int Aflag = 0, Bflag = 0;    /* $TERMINFO was set with -A/-B */

#define EQUAL(s1, s2)   (((s1 == NULL) && (s2 == NULL)) || \
            ((s1 != NULL) && (s2 != NULL) && \
            (strcmp(s1, s2) == 0)))

static void sortnames();
int numcompare(const void *, const void *);
int boolcompare(const void *, const void *);
int strcompare(const void *, const void *);
static void check_nth_terminal(char *, int);

void
badmalloc()
{
    (void) fprintf(stderr, "%s: malloc is out of space!\n", progname);
    exit(-1);
}

/*
    Allocate and initialize the global data structures and variables.
*/
void
allocvariables(int argc, int firstoptind)
{
    register int i, nullseen;

    /* find out how many names we are dealing with */
    for (numbools = 0; boolnames[numbools]; numbools++)
        ;
    for (numnums = 0; numnames[numnums]; numnums++)
        ;
    for (numstrs = 0; strnames[numstrs]; numstrs++)
        ;

    if (verbose) {
        (void) fprintf(trace, "There are %d boolean capabilities.\n",
            numbools);
        (void) fprintf(trace, "There are %d numeric capabilities.\n",
            numnums);
        (void) fprintf(trace, "There are %d string capabilities.\n",
            numstrs);
    }

    /* Allocate storage for the names and their values */
    ibool = (struct boolstruct  *) malloc((unsigned) numbools *
        sizeof (struct boolstruct));
    num = (struct numstruct *) malloc((unsigned) numnums *
        sizeof (struct numstruct));
    str = (struct strstruct *) malloc((unsigned) numstrs *
        sizeof (struct strstruct));

    /* Allocate array to keep track of which names have been used. */
    if (use)
        used = (char *) malloc((unsigned) (argc - firstoptind) *
            sizeof (char));

    if ((ibool == NULL) || (num == NULL) || (str == NULL) ||
        (use && (used == NULL)))
        badmalloc();

    /* Fill in the names and initialize the structures. */
    nullseen = FALSE;
    for (i = 0; i < numbools; i++) {
        ibool[i].infoname = boolnames[i];
        ibool[i].capname = boolcodes[i];
        /* This is necessary until fnames.c is */
        /* incorporated into standard curses. */
        if (nullseen || (boolfnames[i] == NULL)) {
            ibool[i].fullname = "unknown_boolean";
            nullseen = TRUE;
        } else
            ibool[i].fullname = boolfnames[i];
        ibool[i].changed = FALSE;
        ibool[i].seenagain = FALSE;
    }
    nullseen = 0;
    for (i = 0; i < numnums; i++) {
        num[i].infoname = numnames[i];
        num[i].capname = numcodes[i];
        if (nullseen || (numfnames[i] == NULL)) {
            ibool[i].fullname = "unknown_number";
            nullseen = TRUE;
        } else
            num[i].fullname = numfnames[i];
        num[i].changed = FALSE;
        num[i].seenagain = FALSE;
    }
    nullseen = 0;
    for (i = 0; i < numstrs; i++) {
        str[i].infoname = strnames[i];
        str[i].capname = strcodes[i];
        if (nullseen || (strfnames[i] == NULL)) {
            str[i].fullname = "unknown_string";
            nullseen = TRUE;
        } else
            str[i].fullname = strfnames[i];
        str[i].changed = FALSE;
        str[i].seenagain = FALSE;
    }
}

/*
    Routines to be passed to qsort(3) for comparison of the structures.
*/
int
boolcompare(const void *x, const void *y)
{
    struct boolstruct *a;
    struct boolstruct *b;

    a = (struct boolstruct *)x;
    b = (struct boolstruct *)y;

    switch ((int) sortorder) {
        case (int) by_terminfo:
            return (strcmp(a->infoname, b->infoname));
        case (int) by_cap:
            return (strcmp(a->capname, b->capname));
        case (int) by_longnames:
            return (strcmp(a->fullname, b->fullname));
        default:
            return (0);
    }
}

int
numcompare(const void *x, const void *y)
{
    struct numstruct *a;
    struct numstruct *b;

    a = (struct numstruct *)x;
    b = (struct numstruct *)y;
    switch ((int) sortorder) {
        case (int) by_terminfo:
            return (strcmp(a->infoname, b->infoname));
        case (int) by_cap:
            return (strcmp(a->capname, b->capname));
        case (int) by_longnames:
            return (strcmp(a->fullname, b->fullname));
        default:
            return (0);
    }
}

int
strcompare(const void *x, const void *y)
{
    struct strstruct *a;
    struct strstruct *b;

    a = (struct strstruct *)x;
    b = (struct strstruct *)y;

    switch ((int) sortorder) {
        case (int) by_terminfo:
            return (strcmp(a->infoname, b->infoname));
        case (int) by_cap:
            return (strcmp(a->capname, b->capname));
        case (int) by_longnames:
            return (strcmp(a->fullname, b->fullname));
        default:
            return (0);
    }
}

/*
    Sort the entries by their terminfo name.
*/
static void
sortnames()
{
    if (sortorder != by_database) {
        qsort((char *) ibool, (unsigned) numbools,
            sizeof (struct boolstruct), boolcompare);
        qsort((char *) num, (unsigned) numnums,
            sizeof (struct numstruct), numcompare);
        qsort((char *) str, (unsigned) numstrs,
            sizeof (struct strstruct), strcompare);
    }
    return;
}

/*
    Print out a string, or "NULL" if it's not defined.
*/
void
PR(FILE *stream, char *string)
{
    if (string == NULL)
        (void) fprintf(stream, "NULL");
    else
        tpr(stream, string);
}

/*
    Output the 'ko' termcap string. This is a list of all of the input
    keys that input the same thing as the corresponding output strings.
*/
int kncounter;
char kobuffer[512];

char
*addko(char *output, char *input, char *koptr)
{
    char *inptr, *outptr, padbuffer[512];
    inptr = tgetstr(input, (char **)0);
    if (inptr == NULL)
        return (koptr);
    outptr = tgetstr(output, (char **)0);
    if (outptr == NULL)
        return (koptr);
    outptr = rmpadding(outptr, padbuffer, (int *) 0);
    if (strcmp(inptr, outptr) == 0) {
        *koptr++ = *output++;
        *koptr++ = *output++;
        *koptr++ = ',';
        kncounter++;
    }
    return (koptr);
}

void
setupknko()
{
    char *koptr;

    kncounter = 0;
    koptr = kobuffer;

    koptr = addko("bs", "kb", koptr);   /* key_backspace */
    koptr = addko("bt", "kB", koptr);   /* key_btab */
    koptr = addko("cl", "kC", koptr);   /* key_clear */
    koptr = addko("le", "kl", koptr);   /* key_left */
    koptr = addko("do", "kd", koptr);   /* key_down */
    koptr = addko("nd", "kr", koptr);   /* key_right */
    koptr = addko("up", "ku", koptr);   /* key_up */
    koptr = addko("dc", "kD", koptr);   /* key_dc */
    koptr = addko("dl", "kL", koptr);   /* key_dl */
    koptr = addko("cd", "kS", koptr);   /* key_eos */
    koptr = addko("ce", "kE", koptr);   /* key_eol */
    koptr = addko("ho", "kh", koptr);   /* key_home */
    koptr = addko("st", "kT", koptr);   /* key_stab */
    koptr = addko("ic", "kI", koptr);   /* key_ic */
    koptr = addko("im", "kI", koptr);   /* key_ic */
    koptr = addko("al", "kA", koptr);   /* key_il */
    koptr = addko("sf", "kF", koptr);   /* key_sf */
    koptr = addko("ll", "kH", koptr);   /* key_ll */
    koptr = addko("sr", "kR", koptr);   /* key_sr */
    koptr = addko("ei", "kM", koptr);   /* key_eic */
    koptr = addko("ct", "ka", koptr);   /* key_catab */

    /* get rid of comma */
    if (koptr != kobuffer)
        *(--koptr) = '\0';
}

void
pr_kn()
{
    if (kncounter > 0)
        pr_number((char *)0, "kn", (char *)0, kncounter);
}

void
pr_ko()
{
    if (kncounter > 0)
        pr_string((char *)0, "ko", (char *)0, kobuffer);
}

void
pr_bcaps()
{
    char *retptr;
    char padbuffer[512];

    if (verbose)
        (void) fprintf(trace, "looking at 'bs'\n");
    retptr = cconvert(rmpadding(cursor_left, padbuffer, (int *) 0));
    if (strcmp("\\b", retptr) == 0)
        pr_boolean((char *)0, "bs", (char *)0, 1);

    if (verbose)
        (void) fprintf(trace, "looking at 'pt'\n");
    retptr = cconvert(rmpadding(tab, padbuffer, (int *) 0));
    if (strcmp("\\t", retptr) == 0)
        pr_boolean((char *)0, "pt", (char *)0, 1);

    if (verbose)
        (void) fprintf(trace, "looking at 'nc'\n");
    retptr = cconvert(rmpadding(carriage_return, padbuffer, (int *) 0));
    if (strcmp("\\r", retptr) != 0)
        pr_boolean((char *)0, "nc", (char *)0, 1);

    if (verbose)
        (void) fprintf(trace, "looking at 'ns'\n");
    if (scroll_forward == NULL)
        pr_boolean((char *)0, "ns", (char *)0, 1);

    /* Ignore "xr": Return acts like ce \r \n (Delta Data) */
}

void
pr_ncaps()
{
    char padbuffer[512];
    int padding;

    if (verbose)
        (void) fprintf(trace, "looking at 'ug'\n");
    /* Duplicate sg for ug: Number of blank chars left by us or ue */
    if (magic_cookie_glitch > -1)
        pr_number((char *)0, "ug", (char *)0, magic_cookie_glitch);

    if (verbose)
        (void) fprintf(trace, "looking at 'dB'\n");
    /* Number of millisec of bs delay needed */
    (void) rmpadding(cursor_left, padbuffer, &padding);
    if (padding > 0)
        pr_number((char *)0, "dB", (char *)0, padding);

    if (verbose)
        (void) fprintf(trace, "looking at 'dC'\n");
    /* Number of millisec of cr delay needed */
    (void) rmpadding(carriage_return, padbuffer, &padding);
    if (padding > 0)
        pr_number((char *)0, "dC", (char *)0, padding);

    if (verbose)
        (void) fprintf(trace, "looking at 'dF'\n");
    /* Number of millisec of ff delay needed */
    (void) rmpadding(form_feed, padbuffer, &padding);
    if (padding > 0)
        pr_number((char *)0, "dF", (char *)0, padding);

    if (verbose)
        (void) fprintf(trace, "looking at 'dN'\n");
    /* Number of millisec of nl delay needed */
    (void) rmpadding(cursor_down, padbuffer, &padding);
    if (padding > 0)
        pr_number((char *)0, "dN", (char *)0, padding);

    if (verbose)
        (void) fprintf(trace, "looking at 'dT'\n");
    /* Number of millisec of tab delay needed */
    (void) rmpadding(tab, padbuffer, &padding);
    if (padding > 0)
        pr_number((char *)0, "dT", (char *)0, padding);

    /* Handle "kn": Number of "other" keys */
    setupknko();
    pr_kn();
}

void
pr_scaps()
{
    char *retptr;
    char padbuffer[512];

    /* Backspace if not "^H" */
    if (verbose)
        (void) fprintf(trace, "looking at 'bc'\n");
    retptr = cconvert(rmpadding(cursor_left, padbuffer, (int *) 0));
    if (strcmp("\\b", retptr) != 0)
        pr_string((char *)0, "bc", (char *)0, cursor_left);

    /* Newline character (default "\n") */
    if (verbose)
        (void) fprintf(trace, "looking at 'nl'\n");
    retptr = cconvert(rmpadding(cursor_down, padbuffer, (int *) 0));
    if (strcmp("\\n", retptr) != 0)
        pr_string((char *)0, "nl", (char *)0, cursor_down);

    /* Handle "ko" here: Termcap entries for other non-function keys */
    pr_ko();

    /* Ignore "ma": Arrow key map, used by vi version 2 only */
}

/*
    Set up the first terminal and save the values from it.
*/
void
initfirstterm(char *term)
{
    register int i;

    if (verbose)
        (void) fprintf(trace, "setting up terminal type '%s'.\n",
            term);

    (void) setupterm(term, devnull, (int *) 0);

    /* Save the name for later use. */
    if (use) {
        register unsigned int length;
        savettytype = _savettytype;
        if ((length = strlen(ttytype)) >= TTYLEN) {
            savettytype = malloc(length);
            if (savettytype == NULL) {
                (void) fprintf(stderr, "%s: malloc is out "
                    "of space\n", progname);
                (void) strncpy(_savettytype, ttytype,
                    TTYLEN-1);
                _savettytype[TTYLEN] = '\0';
                savettytype = _savettytype;
            }
        } else
            (void) strcpy(_savettytype, ttytype);
    }

    if (printing != pr_none) {
        pr_heading(term, ttytype);
        pr_bheading();
    }

    /* Save the values for the first terminal. */
    for (i = 0; i < numbools; i++) {
        if ((ibool[i].val = tgetflag(ibool[i].capname)) &&
            printing != pr_none)
            pr_boolean(ibool[i].infoname, ibool[i].capname,
                ibool[i].fullname, 1);
        if (verbose)
            (void) fprintf(trace, "%s=%d.\n", ibool[i].infoname,
                ibool[i].val);
    }

    if (printing != pr_none) {
        if (printing == pr_cap)
            pr_bcaps();
        pr_bfooting();
        pr_nheading();
    }

    for (i = 0; i < numnums; i++) {
        if (((num[i].val = tgetnum(num[i].capname)) > -1) &&
            printing != pr_none)
            pr_number(num[i].infoname, num[i].capname,
                num[i].fullname, num[i].val);
        if (verbose)
            (void) fprintf(trace, "%s=%d.\n", num[i].infoname,
                num[i].val);
    }

    if (printing != pr_none) {
        if (printing == pr_cap)
            pr_ncaps();
        pr_nfooting();
        pr_sheading();
    }

    for (i = 0; i < numstrs; i++) {
        str[i].val = tgetstr(str[i].capname, (char **)0);
        if ((str[i].val != NULL) && printing != pr_none)
            pr_string(str[i].infoname, str[i].capname,
                str[i].fullname, str[i].val);
        if (verbose) {
            (void) fprintf(trace, "%s='", str[i].infoname);
            PR(trace, str[i].val);
            (void) fprintf(trace, "'.\n");
        }
    }

    if (printing == pr_cap)
        pr_scaps();

    if (printing != pr_none)
        pr_sfooting();
}

/*
    Set up the n'th terminal.
*/
static void
check_nth_terminal(char *nterm, int n)
{
    register char boolval;
    register short numval;
    register char *strval;
    register int i;

    if (use)
        used[n] = FALSE;

    if (verbose)
        (void) fprintf(trace, "adding in terminal type '%s'.\n",
            nterm);

    (void) setupterm(nterm, devnull, (int *) 0);

    if (printing != pr_none) {
        pr_heading(nterm, ttytype);
        pr_bheading();
    }

    if (diff || common || neither) {
        if (Aflag && Bflag)
            (void) printf("comparing %s (TERMINFO=%s) to %s "
                "(TERMINFO=%s).\n",
            firstterm, term1info, nterm, term2info);
        else if (Aflag)
            (void) printf("comparing %s (TERMINFO=%s) to %s.\n",
                firstterm, term1info, nterm);
        else if (Bflag)
            (void) printf("comparing %s to %s (TERMINFO=%s).\n",
                firstterm, nterm, term2info);
        else
            (void) printf("comparing %s to %s.\n",
                firstterm, nterm);
        (void) printf("    comparing booleans.\n");
    }

    /* save away the values for the nth terminal */
    for (i = 0; i < numbools; i++) {
        boolval = tgetflag(ibool[i].capname);
        if (use) {
            if (ibool[i].seenagain) {
            /*
            ** We do not have to worry about this impossible case
            ** since booleans can have only two values: true and
            ** false.
            ** if (boolval && (boolval != ibool[i].secondval))
            **  {
            **  (void) fprintf(trace, "use= order dependency"
            **  "found:\n");
            **  (void) fprintf(trace, "    %s: %s has %d, %s has"
            **   " %d.\n",
            **  ibool[i].capname, ibool[i].secondname,
            **  ibool[i].secondval, nterm, boolval);
            **  }
            */
            } else {
                if (boolval == TRUE) {
                    ibool[i].seenagain = TRUE;
                    ibool[i].secondval = boolval;
                    ibool[i].secondname = nterm;
                    if (ibool[i].val != boolval)
                        ibool[i].changed = TRUE;
                    else
                        used[n] = TRUE;
                }
            }
        }
        if (boolval) {
            if (printing != pr_none)
                pr_boolean(ibool[i].infoname, ibool[i].capname,
                    ibool[i].fullname, 1);
            if (common && (ibool[i].val == boolval))
                (void) printf("\t%s= T.\n", ibool[i].infoname);
        } else if (neither && !ibool[i].val)
            (void) printf("\t!%s.\n", ibool[i].infoname);
        if (diff && (ibool[i].val != boolval))
            (void) printf("\t%s: %c:%c.\n", ibool[i].infoname,
                ibool[i].val?'T':'F', boolval?'T':'F');
        if (verbose)
            (void) fprintf(trace, "%s: %d:%d, changed=%d, "
                "seen=%d.\n", ibool[i].infoname, ibool[i].val,
                boolval, ibool[i].changed, ibool[i].seenagain);
    }

    if (printing != pr_none) {
        if (printing == pr_cap)
            pr_bcaps();
        pr_bfooting();
        pr_nheading();
    }

    if (diff || common || neither)
        (void) printf("    comparing numbers.\n");

    for (i = 0; i < numnums; i++) {
        numval = tgetnum(num[i].capname);
        if (use) {
            if (num[i].seenagain) {
                if ((numval > -1) &&
                    (numval != num[i].secondval)) {
                    (void) fprintf(stderr,
                        "%s: use = order dependency "
                        "found:\n", progname);
                    (void) fprintf(stderr, "    %s: %s "
                        "has %d, %s has %d.\n",
                        num[i].capname, num[i].secondname,
                        num[i].secondval, nterm, numval);
                }
            } else {
                if (numval > -1) {
                    num[i].seenagain = TRUE;
                    num[i].secondval = numval;
                    num[i].secondname = nterm;
                    if ((numval > -1) &&
                        (num[i].val != numval))
                        num[i].changed = TRUE;
                    else
                        used[n] = TRUE;
                }
            }
        }
        if (numval > -1) {
            if (printing != pr_none)
                pr_number(num[i].infoname, num[i].capname,
                    num[i].fullname, numval);
            if (common && (num[i].val == numval))
                (void) printf("\t%s= %d.\n", num[i].infoname,
                    numval);
            } else if (neither && (num[i].val == -1))
                (void) printf("\t!%s.\n", num[i].infoname);
            if (diff && (num[i].val != numval))
                (void) printf("\t%s: %d:%d.\n",
                    num[i].infoname, num[i].val, numval);
            if (verbose)
                (void) fprintf(trace, "%s: %d:%d, "
                    "changed = %d, seen = %d.\n",
                    num[i].infoname, num[i].val, numval,
                    num[i].changed, num[i].seenagain);
    }

    if (printing != pr_none) {
        if (printing == pr_cap)
            pr_ncaps();
        pr_nfooting();
        pr_sheading();
    }

    if (diff || common || neither)
        (void) printf("    comparing strings.\n");

    for (i = 0; i < numstrs; i++) {
        strval = tgetstr(str[i].capname, (char **)0);
        if (use) {
            if (str[i].seenagain && (strval != NULL)) {
                if (!EQUAL(strval, str[i].secondval)) {
                    (void) fprintf(stderr,
                        "use= order dependency"
                        "  found:\n");
                    (void) fprintf(stderr,
                        "    %s: %s has '",
                        str[i].capname, str[i].secondname);
                    PR(stderr, str[i].secondval);
                    (void) fprintf(stderr,
                        "', %s has '", nterm);
                    PR(stderr, strval);
                    (void) fprintf(stderr, "'.\n");
                }
            } else {
                if (strval != NULL) {
                    str[i].seenagain = TRUE;
                    str[i].secondval = strval;
                    str[i].secondname = nterm;
                    if (!EQUAL(str[i].val, strval))
                        str[i].changed = TRUE;
                    else
                        used[n] = TRUE;
                }
            }
        }
        if (strval != NULL) {
            if (printing != pr_none)
                pr_string(str[i].infoname, str[i].capname,
                    str[i].fullname, strval);
            if (common && EQUAL(str[i].val, strval)) {
                (void) printf("\t%s= '", str[i].infoname);
                PR(stdout, strval);
                (void) printf("'.\n");
            }
        } else if (neither && (str[i].val == NULL))
            (void) printf("\t!%s.\n", str[i].infoname);
        if (diff && !EQUAL(str[i].val, strval)) {
            (void) printf("\t%s: '", str[i].infoname);
            PR(stdout, str[i].val);
            (void) printf("','");
            PR(stdout, strval);
            (void) printf("'.\n");
        }
        if (verbose) {
            (void) fprintf(trace, "%s: '", str[i].infoname);
            PR(trace, str[i].val);
            (void) fprintf(trace, "':'");
            PR(trace, strval);
            (void) fprintf(trace, "',changed=%d,seen=%d.\n",
                str[i].changed, str[i].seenagain);
        }
    }

    if (printing == pr_cap)
        pr_scaps();

    if (printing != pr_none)
        pr_sfooting();

    return;
}

/*
    A capability gets an at-sign if it no longer exists, but
    one of the relative entries contains a value for it.
    It gets printed if the original value is not seen in ANY
    of the relative entries, or if the FIRST relative entry that has
    the capability gives a DIFFERENT value for the capability.
*/
void
dorelative(int firstoptind, int argc, char **argv)
{
    register int i;

    /* turn off printing of termcap and long names */
    pr_init(pr_terminfo);

    /* print out the entry name */
    pr_heading((char *)0, savettytype);

    pr_bheading();

    /* Print out all bools that are different. */
    for (i = 0; i < numbools; i++)
        if (!ibool[i].val && ibool[i].changed)
            pr_boolean(ibool[i].infoname, (char *)0,
                (char *)0, -1);
        else if (ibool[i].val && (ibool[i].changed ||
            !ibool[i].seenagain))
            pr_boolean(ibool[i].infoname, (char *)0, (char *)0, 1);

    pr_bfooting();
    pr_nheading();

    /* Print out all nums that are different. */
    for (i = 0; i < numnums; i++)
        if (num[i].val < 0 && num[i].changed)
            pr_number(num[i].infoname, (char *)0, (char *)0, -1);
        else if (num[i].val >= 0 && (num[i].changed ||
            !num[i].seenagain))
            pr_number(num[i].infoname, (char *)0,
                (char *)0, num[i].val);

    pr_nfooting();
    pr_sheading();

    /* Print out all strs that are different. */
    for (i = 0; i < numstrs; i++)
        if (str[i].val == NULL && str[i].changed)
            pr_string(str[i].infoname, (char *)0, (char *)0,
                (char *)0);
        else if ((str[i].val != NULL) &&
            (str[i].changed || !str[i].seenagain))
    pr_string(str[i].infoname, (char *)0, (char *)0, str[i].val);

    pr_sfooting();

    /* Finish it up. */
    for (i = firstoptind; i < argc; i++)
        if (used[i - firstoptind])
            (void) printf("\tuse=%s,\n", argv[i]);
        else
            (void) fprintf(stderr,
                "%s: 'use=%s' did not add anything to the "
                "description.\n", progname, argv[i]);
}

void
local_setenv(char *termNinfo)
{
    extern char **environ;
    static char *newenviron[2] = { 0, 0 };
    static unsigned int termsize = BUFSIZ;
    static char _terminfo[BUFSIZ];
    static char *terminfo = &_terminfo[0];
    register int termlen;

    if (termNinfo && *termNinfo) {
        if (verbose)
            (void) fprintf(trace, "setting TERMINFO=%s.\n",
                termNinfo);
        termlen = strlen(termNinfo);
        if (termlen + 10 > termsize) {
            termsize = termlen + 20;
            terminfo = (char *) malloc(termsize * sizeof (char));
        }
        if (terminfo == (char *) NULL)
            badmalloc();
        (void) sprintf(terminfo, "TERMINFO=%s", termNinfo);
        newenviron[0] = terminfo;
    } else
        newenviron[0] = (char *) 0;
    environ = newenviron;
}

int
main(int argc, char **argv)
{
    int i, c, firstoptind;
    char *tempargv[2];
    char *term = getenv("TERM");

    term1info = term2info = getenv("TERMINFO");
    progname = argv[0];

    /* parse options */
    while ((c = getopt(argc, argv, "ducnILCvV1rw:s:A:B:")) != EOF)
        switch (c) {
            case 'v':   verbose++;
                    break;
            case '1':   pr_onecolumn(1);
                    break;
            case 'w':   pr_width(atoi(optarg));
                    break;
            case 'd':   diff++;
                    break;
            case 'c':   common++;
                    break;
            case 'n':   neither++;
                    break;
            case 'u':   use++;
                    break;
            case 'L':   pr_init(printing = pr_longnames);
                    break;
            case 'I':   pr_init(printing = pr_terminfo);
                    break;
            case 'C':   pr_init(printing = pr_cap);
                    break;
            case 'A':   term1info = optarg; Aflag++;
                    break;
            case 'B':   term2info = optarg; Bflag++;
                    break;
            case 'r':   pr_caprestrict(0);
                    break;
            case 's':
                if (strcmp(optarg, "d") == 0)
                    sortorder = by_database;
                else if (strcmp(optarg, "i") == 0)
                    sortorder = by_terminfo;
                else if (strcmp(optarg, "l") == 0)
                    sortorder = by_longnames;
                else if (strcmp(optarg, "c") == 0)
                    sortorder = by_cap;
                else
                    goto usage;
                break;
            case 'V':
                (void) printf("%s: version %s\n", progname,
                    "@(#)curses:screen/infocmp.c    1.13");
                exit(0);
            case '?':
                usage:
                (void) fprintf(stderr,
                    "usage: %s [-ducn] [-ILC] [-1Vv] "
                    "[-s d|i|l|c] [-A directory] "
                    "[-B directory] term-names ...\n",
                    progname);
                (void) fprintf(stderr, "\t-d\tprint "
                    "differences (the default for >1 "
                    "term-name)\n");
                (void) fprintf(stderr, "\t-u\tproduce "
                    "relative description\n");
                (void) fprintf(stderr, "\t-c\tprint common "
                    "entries\n");
                (void) fprintf(stderr, "\t-n\tprint entries "
                    "in neither\n");
                (void) fprintf(stderr, "\t-I\tprint terminfo "
                    "entries (the default for 1 term-name)\n");
                (void) fprintf(stderr, "\t-C\tprint termcap "
                    "entries\n");
                (void) fprintf(stderr, "\t-L\tprint long C "
                    "variable names\n");
                (void) fprintf(stderr, "\t-1\tsingle column "
                    "output\n");
                (void) fprintf(stderr, "\t-V\tprint program "
                    "version\n");
                (void) fprintf(stderr, "\t-v\tverbose "
                    "debugging output\n");
                (void) fprintf(stderr, "\t-s\tchange sort "
                    "order\n");
                (void) fprintf(stderr, "\t-A\tset $TERMINFO "
                    "for first term-name\n");
                (void) fprintf(stderr, "\t-B\tset $TERMINFO "
                    "for other term-names\n");
                exit(-1);
        }

    argc -= optind;
    argv += optind;
    optind = 0;

    /* Default to $TERM for -n, -I, -C and -L options. */
    /* This is done by faking argv[][], argc and optind. */
    if (neither && (argc == 0 || argc == 1)) {
        if (argc == 0)
            tempargv[0] = term;
        else
            tempargv[0] = argv[optind];
        tempargv[1] = term;
        argc = 2;
        argv = tempargv;
        optind = 0;
    } else if ((printing != pr_none) && (argc == 0)) {
        tempargv[0] = term;
        argc = 1;
        argv = tempargv;
        optind = 0;
    }

    /* Check for enough names. */
    if ((use || diff || common) && (argc <= 1)) {
        (void) fprintf(stderr,
            "%s: must have at least two terminal names for a "
            "comparison to be done.\n", progname);
        goto usage;
    }

    /* Set the default of diff -d or print -I */
    if (!use && (printing == pr_none) && !common && !neither) {
        if (argc == 0 || argc == 1) {
            if (argc == 0) {
                tempargv[0] = term;
                argc = 1;
                argv = tempargv;
                optind = 0;
            }
            pr_init(printing = pr_terminfo);
        } else
            diff++;
    }

    /* Set the default sorting order. */
    if (sortorder == none)
        switch ((int) printing) {
            case (int) pr_cap:
                sortorder = by_cap; break;
            case (int) pr_longnames:
                sortorder = by_longnames; break;
            case (int) pr_terminfo:
            case (int) pr_none:
                sortorder = by_terminfo; break;
        }

    firstterm = argv[optind++];
    firstoptind = optind;

    allocvariables(argc, firstoptind);
    sortnames();

    devnull = open("/dev/null", O_RDWR);
    local_setenv(term1info);
    initfirstterm(firstterm);
    local_setenv(term2info);
    for (i = 0; optind < argc; optind++, i++)
        check_nth_terminal(argv[optind], i);

    if (use)
        dorelative(firstoptind, argc, argv);

    return (0);
}