usr/src/usr.sbin/mtree/spec.c

/*-
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. 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.
 */

#ifndef lint
static char sccsid[] = "@(#)spec.c      5.14 (Berkeley) 3/2/91";
#endif /* not lint */

#include <sys/types.h>
#include <pwd.h>
#include <grp.h>
#include <stdio.h>
#include <errno.h>
#include <ctype.h>
#include "mtree.h"

extern NODE *root;                      /* root of the tree */

static int lineno;                      /* current spec line number */

spec()
{
        register NODE *centry, *last;
        register char *p;
        NODE ginfo, *emalloc();
        char buf[2048];

        bzero((void *)&ginfo, sizeof(ginfo));
        for (lineno = 1; fgets(buf, sizeof(buf), stdin); ++lineno) {
                if (!(p = index(buf, '\n'))) {
                        (void)fprintf(stderr,
                            "mtree: line %d too long.\n", lineno);
                        exit(1);
                }
                *p = '\0';
                for (p = buf; *p && isspace(*p); ++p);
                if (!*p || *p == '#')
                        continue;

                /* grab file name, "$", "set", or "unset" */
                if (!(p = strtok(p, "\n\t ")))
                        specerr();

                if (p[0] == '/')
                        switch(p[1]) {
                        case 's':
                                if (strcmp(p + 1, "set"))
                                        break;
                                set(&ginfo);
                                continue;
                        case 'u':
                                if (strcmp(p + 1, "unset"))
                                        break;
                                unset(&ginfo);
                                continue;
                        }

                if (index(p, '/')) {
                        (void)fprintf(stderr,
                            "mtree: file names may not contain slashes.\n");
                        specerr();
                }

                if (!strcmp(p, "..")) {
                        /* don't go up, if haven't gone down */
                        if (!root)
                                noparent();
                        if (last->type != F_DIR || last->flags & F_DONE) {
                                if (last == root)
                                        noparent();
                                last = last->parent;
                        }
                        last->flags |= F_DONE;
                        continue;
                }

                centry = emalloc(sizeof(NODE) + strlen(p));
                *centry = ginfo;
                (void)strcpy(centry->name, p);
#define MAGIC   "?*["
                if (strpbrk(p, MAGIC))
                        centry->flags |= F_MAGIC;
                set(centry);

                if (!root) {
                        last = root = centry;
                        root->parent = root;
                } else if (last->type == F_DIR && !(last->flags & F_DONE)) {
                        centry->parent = last;
                        last = last->child = centry;
                } else {
                        centry->parent = last->parent;
                        centry->prev = last;
                        last = last->next = centry;
                }
        }
}

set(ip)
        register NODE *ip;
{
        register int type;
        register char *kw, *val;
        gid_t getgroup();
        uid_t getowner();
        long atol(), strtol();

        while (kw = strtok((char *)NULL, "= \t\n")) {
                ip->flags |= type = key(kw);
                val = strtok((char *)NULL, " \t\n");
                if (!val)
                        specerr();
                switch(type) {
                case F_CKSUM:
                        ip->cksum = atol(val);
                        break;
                case F_GROUP:
                        ip->st_gid = getgroup(val);
                        break;
                case F_IGN:
                        /* just set flag bit */
                        break;
                case F_MODE: {
                        mode_t *m, *setmode();

                        if (!(m = setmode(val))) {
                                (void)fprintf(stderr,
                                    "mtree: invalid file mode %s.\n", val);
                                specerr();
                        }
                        ip->st_mode = getmode(m, 0);
                        break;
                }
                case F_NLINK:
                        ip->st_nlink = atoi(val);
                        break;
                case F_OWNER:
                        ip->st_uid = getowner(val);
                        break;
                case F_SIZE:
                        ip->st_size = atol(val);
                        break;
                case F_SLINK:
                        if (!(ip->slink = strdup(val)))
                                nomem();
                        break;
                case F_TIME:
                        ip->st_mtime = atol(val);
                        break;
                case F_TYPE:
                        switch(*val) {
                        case 'b':
                                if (!strcmp(val, "block"))
                                        ip->type = F_BLOCK;
                                break;
                        case 'c':
                                if (!strcmp(val, "char"))
                                        ip->type = F_CHAR;
                                break;
                        case 'd':
                                if (!strcmp(val, "dir"))
                                        ip->type = F_DIR;
                                break;
                        case 'f':
                                if (!strcmp(val, "file"))
                                        ip->type = F_FILE;
                                if (!strcmp(val, "fifo"))
                                        ip->type = F_FIFO;
                                break;
                        case 'l':
                                if (!strcmp(val, "link"))
                                        ip->type = F_LINK;
                                break;
                        case 's':
                                if (!strcmp(val, "socket"))
                                        ip->type = F_SOCK;
                                break;
                        default:
                                (void)fprintf(stderr,
                                    "mtree: unknown file type %s.\n", val);
                                specerr();
                        }
                        break;
                }
        }
}

unset(ip)
        register NODE *ip;
{
        register char *p;

        while (p = strtok((char *)NULL, "\n\t "))
                ip->flags &= ~key(p);
}

key(p)
        char *p;
{
        switch(*p) {
        case 'c':
                if (!strcmp(p, "cksum"))
                        return(F_CKSUM);
                break;
        case 'g':
                if (!strcmp(p, "group"))
                        return(F_GROUP);
                break;
        case 'i':
                if (!strcmp(p, "ignore"))
                        return(F_IGN);
                break;
        case 'l':
                if (!strcmp(p, "link"))
                        return(F_SLINK);
                break;
        case 'm':
                if (!strcmp(p, "mode"))
                        return(F_MODE);
                break;
        case 'n':
                if (!strcmp(p, "nlink"))
                        return(F_NLINK);
                break;
        case 'o':
                if (!strcmp(p, "owner"))
                        return(F_OWNER);
                break;
        case 's':
                if (!strcmp(p, "size"))
                        return(F_SIZE);
                break;
        case 't':
                if (!strcmp(p, "type"))
                        return(F_TYPE);
                if (!strcmp(p, "time"))
                        return(F_TIME);
                break;
        }
        (void)fprintf(stderr, "mtree: unknown keyword %s.\n", p);
        specerr();
        /* NOTREACHED */
}


uid_t
getowner(p)
        register char *p;
{
        struct passwd *pw;
        int val;

        if (isdigit(*p)) {
                if ((val = atoi(p)) >= 0)
                        return((uid_t)val);
                (void)fprintf(stderr, "mtree: illegal uid value %s.\n", p);
        } else if (pw = getpwnam(p))
                return(pw->pw_uid);
        else
                (void)fprintf(stderr, "mtree: unknown user %s.\n", p);
        specerr();
        /* NOTREACHED */
}

gid_t
getgroup(p)
        register char *p;
{
        struct group *gr;
        int val;

        if (isdigit(*p)) {
                if ((val = atoi(p)) >= 0)
                        return((gid_t)val);
                (void)fprintf(stderr, "mtree: illegal gid value %s.\n", p);
        } else if (gr = getgrnam(p))
                return(gr->gr_gid);
        else
                (void)fprintf(stderr, "mtree: unknown group %s.\n", p);
        specerr();
        /* NOTREACHED */
}

noparent()
{
        (void)fprintf(stderr, "mtree: no parent node.\n");
        specerr();
}

specerr()
{
        (void)fprintf(stderr,
            "mtree: line %d of the specification is incorrect.\n", lineno);
        exit(1);
}

NODE *
emalloc(size)
        int size;
{
        void *p;

        /* NOSTRICT */
        if (!(p = malloc((u_int)size)))
                nomem();
        bzero(p, size);
        return((NODE *)p);
}

nomem()
{
        (void)fprintf(stderr, "mtree: %s.\n", strerror(ENOMEM));
        exit(1);
}