/* $TOG: checktree.c /main/8 1998/02/06 11:23:04 kaleb $ */

/*

 * Motif
 *
 * Copyright (c) 1987-2012, The Open Group. All rights reserved.
 *
 * These libraries and programs are free software; you can
 * redistribute them and/or modify them under the terms of the GNU
 * Lesser General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * These libraries and programs are distributed in the hope that
 * they will be useful, but WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE. See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with these librararies and programs; if not, write
 * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
 * Floor, Boston, MA 02110-1301 USA

*/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif


#include <X11/Xos.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <errno.h>

#ifndef X_NOT_POSIX
#include <dirent.h>
#else
#ifdef SYSV
#include <dirent.h>
#else
#ifdef USG
#include <dirent.h>
#else
#include <sys/dir.h>
#ifndef dirent
#define dirent direct
#endif
#endif
#endif
#endif

#ifdef S_IFLNK
#define Stat lstat
#else
#define Stat stat
#endif

#define CHARSALLOWED \
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_."

#define fmode_bits_minset 0444
#define fmode_bits_maxset 0777
#define fmode_bits_write  0222
#define dmode_bits_minset 0775

#ifdef X_NOT_STDC_ENV
extern int errno;
#endif

int dorcs = 1;			/* check RCS file */
int do83 = 1;			/* check for 8+3 clash */
int doro = 1;			/* disallow writable (checked out) files */
int dodot = 1;			/* disallow .files */
int dotwiddle = 1;		/* disallow file~ */

int dontcare(fn)
    char *fn;
{
    char *cp;

    if (fn[strlen(fn) - 1] == '~')
	return 1;
    cp = strrchr(fn, '.');
    return cp && (!strcmp(cp + 1, "Z") || !strcmp(cp + 1, "PS"));
}

checkfile(fullname, fn, fs)
    char *fullname, *fn;
    struct stat *fs;
{
    char *cp;
    int maxlen = 12;
    int len, mode;

    if (dodot && fn[0] == '.') {
	printf("dot file: %s\n", fullname);
	return;
    }
    for (len = 0, cp = fn; *cp; len++, cp++) {
	if (!strchr(CHARSALLOWED, *cp)) {
	    if (dotwiddle || *cp != '~' || cp[1])
		printf ("bad character: %s\n", fullname);
	    break;
	}
    }
    if (len > maxlen && !dontcare(fn))
	printf("too long (%d): %s\n", len, fullname);
#ifdef S_IFLNK
    if ((fs->st_mode & S_IFLNK) == S_IFLNK) {
	printf("symbolic link: %s\n", fullname);
	return;
    }
#endif
    mode = fs->st_mode & (~S_IFMT);
    if ((fs->st_mode & S_IFDIR) == S_IFDIR) {
	maxlen = 14;
	if ((mode & dmode_bits_minset) != dmode_bits_minset)
	    printf("directory mode 0%o not minimum 0%o: %s\n",
		   mode, dmode_bits_minset, fullname);
    } else if ((fs->st_mode & S_IFREG) != S_IFREG)
	printf("not a regular file: %s\n", fullname);
    else {
	if ((mode & fmode_bits_minset) != fmode_bits_minset)
	    printf("file mode 0%o not minimum 0%o: %s\n",
		   fs->st_mode, fmode_bits_minset, fullname);
	if (fs->st_nlink != 1)
	    printf("%d links instead of 1: %s\n", fs->st_nlink, fullname);
	if (doro && (mode & fmode_bits_write) && !dontcare(fn))
	    printf("writable: %s\n", fullname);
    }
    if ((mode & ~fmode_bits_maxset) != 0)
	printf("mode 0%o outside maximum set 0%o: %s\n",
	       mode, fmode_bits_maxset, fullname);
}

void
checkrcs(dir, p)
    char *dir;
    char *p;
{
    DIR *df;
    struct dirent *dp;
    struct stat fs;
    int i;

    if (!(df = opendir(dir))) {
	fprintf(stderr, "cannot open: %s\n", dir);
	return;
    }
    while (dp = readdir(df)) {
	i = strlen(dp->d_name);
	if (dp->d_name[i - 1] == 'v' && dp->d_name[i - 2] == ',') {
	    strcpy(p, dp->d_name);
	    p[i - 2] = '\0';
	    if (Stat(dir, &fs) < 0) {
		strcpy(p, "RCS/");
		strcat(p, dp->d_name);
		printf("not used: %s\n", dir);
	    }
	}
    }
    closedir(df);
}

int
Strncmp(cp1, cp2, n)
    char *cp1, *cp2;
    int n;
{
    char c1, c2;

    for (; --n >= 0 && *cp1 && *cp2; cp1++, cp2++) {
	if (*cp1 != *cp2) {
	    c1 = *cp1;
	    c2 = *cp2;
	    if (c1 >= 'A' && c1 <= 'Z')
		c1 += 'a' - 'A';
	    else if (c1 == '-')
		c1 = '_';
	    if (c2 >= 'A' && c2 <= 'Z')
		c2 += 'a' - 'A';
	    else if (c2 == '-')
		c2 = '_';
	    if (c1 != c2)
		return (int)c1 - (int)c2;
	}
    }
    if (n < 0)
	return 0;
    return (int)*cp1 - (int)*cp2;
}

int
fncomp(n1, n2)
    char **n1, **n2;
{
    int i, res;
    char *cp1, *cp2;
    char c1, c2;

    i = Strncmp(*n1, *n2, 8);
    if (!i) {
	cp1 = strrchr(*n1, '.');
	cp2 = strrchr(*n2, '.');
	if (cp1 || cp2) {
	    if (!cp1)
		return -1;
	    if (!cp2)
		return 1;
	    i = Strncmp(cp1 + 1, cp2 + 1, 3);
	}
    }
    return i;
}

void
checkdir(dir)
    char *dir;
{
    DIR *df;
    struct dirent *dp;
    char *p;
    struct stat fs;
    char *s, **names;
    int i, max;

    if (!(df = opendir(dir))) {
	fprintf(stderr, "cannot open: %s\n", dir);
	return;
    }
    p = dir + strlen(dir);
    if (p[-1] != '/')
	*p++ = '/';
    i = 0;
    max = 0;
    names = NULL;
    while (dp = readdir(df)) {
	strcpy(p, dp->d_name);
	if (Stat(dir, &fs) < 0) {
	    perror(dir);
	    continue;
	}
	if ((fs.st_mode & S_IFDIR) == S_IFDIR) {
	    if (dp->d_name[0] == '.' &&
		(dp->d_name[1] == '\0' || (dp->d_name[1] == '.' &&
					   dp->d_name[2] == '\0')))
		continue;
	    if (!strcmp (dp->d_name, "RCS")) {
		if (dorcs)
		    checkrcs(dir, p);
		continue;
	    }
	    if (!strcmp (dp->d_name, "SCCS"))
		continue;
	    if (!strcmp (dp->d_name, "CVS.adm"))
		continue;
	    checkfile(dir, p, &fs);
	    checkdir(dir);
	    continue;
	}
	checkfile(dir, p, &fs);
	if (dorcs && !dontcare(dp->d_name)) {
	    strcpy(p, "RCS/");
	    strcat(p, dp->d_name);
	    strcat(p, ",v");
	    if (Stat(dir, &fs) < 0) {
		strcpy(p, dp->d_name);
		printf("no RCS: %s\n", dir);
	    }
	}
	if (do83) {
	    s = (char *)malloc(strlen(dp->d_name) + 1);
	    strcpy(s, dp->d_name);
	    if (i >= max) {
		max += 25;
		if (names)
		    names = (char **)realloc((char *)names,
					     (max + 1) * sizeof(char *));
		else
		    names = (char **)malloc((max + 1) * sizeof(char *));
	    }
	    names[i++] = s;
	}
    }
    closedir(df);
    if (do83) {
	qsort((char *)names, i, sizeof(char *), fncomp);
	max = i - 1;
	*p = '\0';
	for (i = 0; i < max; i++) {
	    if (!fncomp(&names[i], &names[i + 1]))
		printf("8+3 clash: %s%s and %s\n",
		       dir, names[i], names[i + 1]);
	    free(names[i]);
	}
	if (names) {
	    free(names[i]);
	    free((char *)names);
	}
    }
}

main(argc, argv)
    int argc;
    char **argv;
{
    char buf[2048];

    argc--;
    argv++;
    while (argc > 0) {
	if (!strcmp(*argv, "-rcs")) {
	    dorcs = 0;
	    argc--;
	    argv++;
	} else if (!strcmp(*argv, "-83")) {
	    do83 = 0;
	    argc--;
	    argv++;
	} else if (!strcmp(*argv, "-ro")) {
	    doro = 0;
	    argc--;
	    argv++;
	} else if (!strcmp(*argv, "-dot")) {
	    dodot = 0;
	    argc--;
	    argv++;
	} else if (!strcmp(*argv, "-twiddle")) {
	    dotwiddle = 0;
	    argc--;
	    argv++;
	} else
	    break;
    }
    if (!argc) {
	strcpy(buf, ".");
	checkdir(buf);
    } else
	while (--argc >= 0) {
	    strcpy(buf, *argv++);
	    checkdir(buf);
	}
}