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create.c

/**   $MirOS: src/usr.sbin/mtree/create.c,v 1.3 2005/04/13 20:32:24 tg Exp $ */
/*    $NetBSD: create.c,v 1.11 1996/09/05 09:24:19 mycroft Exp $  */
/*    $OpenBSD: create.c,v 1.24 2004/11/21 19:36:04 otto Exp $    */

/*-
 * Copyright (c) 1989, 1993
 *    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. 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/param.h>
#include <sys/stat.h>
#include <time.h>
#include <fcntl.h>
#include <fts.h>
#include <dirent.h>
#include <grp.h>
#include <pwd.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <stdarg.h>
#include <vis.h>
#include <md5.h>
#include <sha1.h>
#include <rmd160.h>
#include "mtree.h"
#include "extern.h"

__SCCSID("@(#)create.c  8.1 (Berkeley) 6/6/93");
__RCSID("$MirOS: src/usr.sbin/mtree/create.c,v 1.3 2005/04/13 20:32:24 tg Exp $");

#define     INDENTNAMELEN     15
#define     MAXLINELEN  80

extern u_int32_t crc_total;
extern int ftsoptions;
extern int dflag, iflag, nflag, sflag;
extern u_int keys;
extern char fullpath[MAXPATHLEN];

static gid_t gid;
static uid_t uid;
static mode_t mode;

static void output(int, int *, const char *, ...);
static int  statd(FTS *, FTSENT *, uid_t *, gid_t *, mode_t *);
static void statf(int, FTSENT *);

void
cwalk(void)
{
      FTS *t;
      FTSENT *p;
      time_t clock;
      char *argv[2], host[MAXHOSTNAMELEN];
      int indent = 0;

      (void)time(&clock);
      (void)gethostname(host, sizeof(host));
      (void)printf(
          "#\t   user: %s\n#\tmachine: %s\n#\t   tree: %s\n#\t   date: %s",
          getlogin(), host, fullpath, ctime(&clock));

      argv[0] = ".";
      argv[1] = NULL;
      if ((t = fts_open(argv, ftsoptions, dsort)) == NULL)
            error("fts_open: %s", strerror(errno));
      while ((p = fts_read(t))) {
            if (iflag)
                  indent = p->fts_level * 4;
            switch(p->fts_info) {
            case FTS_D:
                  if (!dflag)
                        (void)printf("\n");
                  if (!nflag)
                        (void)printf("# %s\n", p->fts_path);
                  statd(t, p, &uid, &gid, &mode);
                  statf(indent, p);
                  break;
            case FTS_DP:
                  if (!nflag && (p->fts_level > 0))
                        (void)printf("%*s# %s\n", indent, "", p->fts_path);
                  (void)printf("%*s..\n", indent, "");
                  if (!dflag)
                        (void)printf("\n");
                  break;
            case FTS_DNR:
            case FTS_ERR:
            case FTS_NS:
                  (void)fprintf(stderr, "mtree: %s: %s\n",
                      p->fts_path, strerror(p->fts_errno));
                  break;
            default:
                  if (!dflag)
                        statf(indent, p);
                  break;

            }
      }
      (void)fts_close(t);
      if (sflag && keys & F_CKSUM)
            (void)fprintf(stderr,
                "mtree: %s checksum: %u\n", fullpath, crc_total);
}

static void
statf(int indent, FTSENT *p)
{
      struct group *gr;
      struct passwd *pw;
      u_int32_t len, val;
      int fd, offset;
      char *name, *escaped_name;
      size_t esc_len;

      esc_len = p->fts_namelen * 4 + 1;
      escaped_name = malloc(esc_len);
      if (escaped_name == NULL)
            error("statf: %s", strerror(errno));
      strnvis(escaped_name, p->fts_name, esc_len, VIS_WHITE | VIS_OCTAL);

      if (iflag || S_ISDIR(p->fts_statp->st_mode))
            offset = printf("%*s%s", indent, "", escaped_name);
      else
            offset = printf("%*s    %s", indent, "", escaped_name);

      free(escaped_name);

      if (offset > (INDENTNAMELEN + indent))
            offset = MAXLINELEN;
      else
            offset += printf("%*s", (INDENTNAMELEN + indent) - offset, "");

      if (!S_ISREG(p->fts_statp->st_mode) && !dflag)
            output(indent, &offset, "type=%s", inotype(p->fts_statp->st_mode));
      if (p->fts_statp->st_uid != uid) {
            if (keys & F_UNAME) {
                  if ((pw = getpwuid(p->fts_statp->st_uid)) != NULL) {
                        output(indent, &offset, "uname=%s", pw->pw_name);
                  } else {
                        error("could not get uname for uid=%u",
                            p->fts_statp->st_uid);
                  }
            }
            if (keys & F_UID)
                  output(indent, &offset, "uid=%u", p->fts_statp->st_uid);
      }
      if (p->fts_statp->st_gid != gid) {
            if (keys & F_GNAME) {
                  if ((gr = getgrgid(p->fts_statp->st_gid)) != NULL) {
                        output(indent, &offset, "gname=%s", gr->gr_name);
                  } else {
                        error("could not get gname for gid=%u",
                            p->fts_statp->st_gid);
                  }
            }
            if (keys & F_GID)
                  output(indent, &offset, "gid=%u", p->fts_statp->st_gid);
      }
      if (keys & F_MODE && (p->fts_statp->st_mode & MBITS) != mode)
            output(indent, &offset, "mode=%#o", p->fts_statp->st_mode & MBITS);
      if (keys & F_NLINK && p->fts_statp->st_nlink != 1)
            output(indent, &offset, "nlink=%u", p->fts_statp->st_nlink);
      if (keys & F_SIZE && S_ISREG(p->fts_statp->st_mode))
            output(indent, &offset, "size=%qd", p->fts_statp->st_size);
      if (keys & F_TIME)
#ifdef __INTERIX
            output(indent, &offset, "time=%ld.0",
                p->fts_statp->st_mtime);
#else
            output(indent, &offset, "time=%ld.%ld",
                p->fts_statp->st_mtimespec.tv_sec,
                p->fts_statp->st_mtimespec.tv_nsec);
#endif
      if (keys & F_CKSUM && S_ISREG(p->fts_statp->st_mode)) {
            if ((fd = open(p->fts_accpath, O_RDONLY, 0)) < 0 ||
                crc(fd, &val, &len))
                  error("%s: %s", p->fts_accpath, strerror(errno));
            (void)close(fd);
            output(indent, &offset, "cksum=%lu", val);
      }
      if (keys & F_MD5 && S_ISREG(p->fts_statp->st_mode)) {
            char *md5digest, buf[MD5_DIGEST_STRING_LENGTH];

            md5digest = MD5File(p->fts_accpath,buf);
            if (!md5digest)
                  error("%s: %s", p->fts_accpath, strerror(errno));
            else
                  output(indent, &offset, "md5digest=%s", md5digest);
      }
      if (keys & F_RMD160 && S_ISREG(p->fts_statp->st_mode)) {
            char *rmd160digest, buf[RMD160_DIGEST_STRING_LENGTH];

            rmd160digest = RMD160File(p->fts_accpath,buf);
            if (!rmd160digest)
                  error("%s: %s", p->fts_accpath, strerror(errno));
            else
                  output(indent, &offset, "rmd160digest=%s", rmd160digest);
      }
      if (keys & F_SHA1 && S_ISREG(p->fts_statp->st_mode)) {
            char *sha1digest, buf[SHA1_DIGEST_STRING_LENGTH];

            sha1digest = SHA1File(p->fts_accpath,buf);
            if (!sha1digest)
                  error("%s: %s", p->fts_accpath, strerror(errno));
            else
                  output(indent, &offset, "sha1digest=%s", sha1digest);
      }
      if (keys & F_SLINK &&
          (p->fts_info == FTS_SL || p->fts_info == FTS_SLNONE)) {
            name = rlink(p->fts_accpath);
            esc_len = strlen(name) * 4 + 1;
            escaped_name = malloc(esc_len);
            if (escaped_name == NULL)
                  error("statf: %s", strerror(errno));
            strnvis(escaped_name, name, esc_len, VIS_WHITE | VIS_OCTAL);
            output(indent, &offset, "link=%s", escaped_name);
            free(escaped_name);
      }
#ifndef __INTERIX
      if (keys & F_FLAGS && !S_ISLNK(p->fts_statp->st_mode)) {
            char *file_flags;

            file_flags = fflagstostr(p->fts_statp->st_flags);
            if (file_flags == NULL)
                  error("%s", strerror(errno));
            if (*file_flags != '\0')
                  output(indent, &offset, "flags=%s", file_flags);
            else
                  output(indent, &offset, "flags=none");
            free(file_flags);
      }
#endif
      (void)putchar('\n');
}

#define     MAXGID      5000
#define     MAXUID      5000
#define     MAXMODE     MBITS + 1

static int
statd(FTS *t, FTSENT *parent, uid_t *puid, gid_t *pgid, mode_t *pmode)
{
      FTSENT *p;
      gid_t sgid;
      uid_t suid;
      mode_t smode;
      struct group *gr;
      struct passwd *pw;
      gid_t savegid = *pgid;
      uid_t saveuid = *puid;
      mode_t savemode = *pmode;
      int maxgid;
      int maxuid;
      u_short maxmode;
      gid_t g[MAXGID];
      uid_t u[MAXUID];
      mode_t m[MAXMODE];
      static int first = 1;

      if ((p = fts_children(t, 0)) == NULL) {
            if (errno)
                  error("%s: %s", RP(parent), strerror(errno));
            return (1);
      }

      bzero(g, sizeof(g));
      bzero(u, sizeof(u));
      bzero(m, sizeof(m));

      maxuid = maxgid = maxmode = 0;
      for (; p; p = p->fts_link) {
            if (!dflag || (dflag && S_ISDIR(p->fts_statp->st_mode))) {
                  smode = p->fts_statp->st_mode & MBITS;
                  if (smode < MAXMODE && ++m[smode] > maxmode) {
                        savemode = smode;
                        maxmode = m[smode];
                  }
                  sgid = p->fts_statp->st_gid;
                  if (sgid < MAXGID && ++g[sgid] > maxgid) {
                        savegid = sgid;
                        maxgid = g[sgid];
                  }
                  suid = p->fts_statp->st_uid;
                  if (suid < MAXUID && ++u[suid] > maxuid) {
                        saveuid = suid;
                        maxuid = u[suid];
                  }
            }
      }
      /*
       * If the /set record is the same as the last one we do not need to output
       * a new one.  So first we check to see if anything changed.  Note that we
       * always output a /set record for the first directory.
       */
      if ((((keys & F_UNAME) | (keys & F_UID)) && (*puid != saveuid)) ||
          (((keys & F_GNAME) | (keys & F_GID)) && (*pgid != savegid)) ||
          ((keys & F_MODE) && (*pmode != savemode)) || (first)) {
            first = 0;
            if (dflag)
                  (void)printf("/set type=dir");
            else
                  (void)printf("/set type=file");
            if (keys & F_UNAME) {
                  if ((pw = getpwuid(saveuid)) != NULL)
                        (void)printf(" uname=%s", pw->pw_name);
                  else
                        error("could not get uname for uid=%u", saveuid);
            }
            if (keys & F_UID)
                  (void)printf(" uid=%u", (unsigned)saveuid);
            if (keys & F_GNAME) {
                  if ((gr = getgrgid(savegid)) != NULL)
                        (void)printf(" gname=%s", gr->gr_name);
                  else
                        error("could not get gname for gid=%u", savegid);
            }
            if (keys & F_GID)
                  (void)printf(" gid=%u", (unsigned)savegid);
            if (keys & F_MODE)
                  (void)printf(" mode=%#o", (unsigned)savemode);
            if (keys & F_NLINK)
                  (void)printf(" nlink=1");
            (void)printf("\n");
            *puid = saveuid;
            *pgid = savegid;
            *pmode = savemode;
      }
      return (0);
}

int
dsort(const FTSENT **a, const FTSENT **b)
{
      if (S_ISDIR((*a)->fts_statp->st_mode)) {
            if (!S_ISDIR((*b)->fts_statp->st_mode))
                  return (1);
      } else if (S_ISDIR((*b)->fts_statp->st_mode))
            return (-1);
      return (strcmp((*a)->fts_name, (*b)->fts_name));
}

void
output(int indent, int *offset, const char *fmt, ...)
{
      va_list ap;
      char buf[1024];

      va_start(ap, fmt);
      (void)vsnprintf(buf, sizeof(buf), fmt, ap);
      va_end(ap);

      if (*offset + strlen(buf) > MAXLINELEN - 3) {
            (void)printf(" \\\n%*s", INDENTNAMELEN + indent, "");
            *offset = INDENTNAMELEN + indent;
      }
      *offset += printf(" %s", buf) + 1;
}

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