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freebsd-nq/contrib/mtree/create.c
Bryan Drewery 2dfa4b66b3 fts_read: Handle error from a NULL return better. 
This is addressing cases such as fts_read(3) encountering an [EIO]
from fchdir(2) when FTS_NOCHDIR is not set.  That would otherwise be
seen as a successful traversal in some of these cases while silently
discarding expected work.

As noted in r264201, fts_read() does not set errno to 0 on a successful
EOF so it needs to be set before calling it.  Otherwise we might see
a random error from one of the iterations.

gzip is ignoring most errors and could be improved separately.

Reviewed by:	vangyzen
Sponsored by:	Dell EMC
Differential Revision:	https://reviews.freebsd.org/D27184
2020-12-08 23:38:26 +00:00

480 lines
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/* $NetBSD: create.c,v 1.73 2014/04/24 17:22:41 christos 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.
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/cdefs.h>
#if defined(__RCSID) && !defined(lint)
#if 0
static char sccsid[] = "@(#)create.c 8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: create.c,v 1.73 2014/04/24 17:22:41 christos Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/stat.h>
#if ! HAVE_NBTOOL_CONFIG_H
#include <dirent.h>
#endif
#include <errno.h>
#include <fcntl.h>
#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#ifndef NO_MD5
#include <md5.h>
#endif
#ifndef NO_RMD160
#include <rmd160.h>
#endif
#ifndef NO_SHA1
#include <sha1.h>
#endif
#ifndef NO_SHA2
#include <sha2.h>
#endif
#include "extern.h"
#define INDENTNAMELEN 15
#define MAXLINELEN 80
static gid_t gid;
static uid_t uid;
static mode_t mode;
static u_long flags;
#ifdef __FreeBSD__
#define FTS_CONST const
#else
#define FTS_CONST
#endif
static int dcmp(const FTSENT *FTS_CONST *, const FTSENT *FTS_CONST *);
static void output(FILE *, int, int *, const char *, ...)
__printflike(4, 5);
static int statd(FILE *, FTS *, FTSENT *, uid_t *, gid_t *, mode_t *,
u_long *);
static void statf(FILE *, int, FTSENT *);
void
cwalk(FILE *fp)
{
FTS *t;
FTSENT *p;
time_t clocktime;
char host[MAXHOSTNAMELEN + 1];
const char *user;
char *argv[2];
char dot[] = ".";
int indent = 0;
argv[0] = dot;
argv[1] = NULL;
time(&clocktime);
gethostname(host, sizeof(host));
host[sizeof(host) - 1] = '\0';
if ((user = getlogin()) == NULL) {
struct passwd *pw;
user = (pw = getpwuid(getuid())) != NULL ? pw->pw_name :
"<unknown>";
}
if (!nflag)
fprintf(fp,
"#\t user: %s\n#\tmachine: %s\n#\t tree: %s\n"
"#\t date: %s",
user, host, fullpath, ctime(&clocktime));
if ((t = fts_open(argv, ftsoptions, dcmp)) == NULL)
mtree_err("fts_open: %s", strerror(errno));
while (errno = 0, (p = fts_read(t)) != NULL) {
if (jflag)
indent = p->fts_level * 4;
if (check_excludes(p->fts_name, p->fts_path)) {
fts_set(t, p, FTS_SKIP);
continue;
}
if (!find_only(p->fts_path)) {
fts_set(t, p, FTS_SKIP);
continue;
}
switch(p->fts_info) {
case FTS_D:
if (!bflag)
fprintf(fp, "\n");
if (!nflag)
fprintf(fp, "# %s\n", p->fts_path);
statd(fp, t, p, &uid, &gid, &mode, &flags);
statf(fp, indent, p);
break;
case FTS_DP:
if (p->fts_level > 0)
if (!nflag)
fprintf(fp, "%*s# %s\n", indent, "",
p->fts_path);
if (p->fts_level > 0 || flavor == F_FREEBSD9) {
fprintf(fp, "%*s..\n", indent, "");
if (!bflag)
fprintf(fp, "\n");
}
break;
case FTS_DNR:
case FTS_ERR:
case FTS_NS:
mtree_err("%s: %s",
p->fts_path, strerror(p->fts_errno));
break;
default:
if (!dflag)
statf(fp, indent, p);
break;
}
}
if (errno != 0)
mtree_err("fts_read: %s", strerror(errno));
fts_close(t);
if (sflag && keys & F_CKSUM)
mtree_err("%s checksum: %u", fullpath, crc_total);
}
static void
statf(FILE *fp, int indent, FTSENT *p)
{
u_int32_t len, val;
int fd, offset;
const char *name = NULL;
#if !defined(NO_MD5) || !defined(NO_RMD160) || !defined(NO_SHA1) || !defined(NO_SHA2)
char *digestbuf;
#endif
offset = fprintf(fp, "%*s%s%s", indent, "",
S_ISDIR(p->fts_statp->st_mode) ? "" : " ", vispath(p->fts_name));
if (offset > (INDENTNAMELEN + indent))
offset = MAXLINELEN;
else
offset += fprintf(fp, "%*s",
(INDENTNAMELEN + indent) - offset, "");
if (!S_ISREG(p->fts_statp->st_mode) && (flavor == F_NETBSD6 || !dflag))
output(fp, indent, &offset, "type=%s",
inotype(p->fts_statp->st_mode));
if (keys & (F_UID | F_UNAME) && p->fts_statp->st_uid != uid) {
if (keys & F_UNAME &&
(name = user_from_uid(p->fts_statp->st_uid, 1)) != NULL)
output(fp, indent, &offset, "uname=%s", name);
if (keys & F_UID || (keys & F_UNAME && name == NULL))
output(fp, indent, &offset, "uid=%u",
p->fts_statp->st_uid);
}
if (keys & (F_GID | F_GNAME) && p->fts_statp->st_gid != gid) {
if (keys & F_GNAME &&
(name = group_from_gid(p->fts_statp->st_gid, 1)) != NULL)
output(fp, indent, &offset, "gname=%s", name);
if (keys & F_GID || (keys & F_GNAME && name == NULL))
output(fp, indent, &offset, "gid=%u",
p->fts_statp->st_gid);
}
if (keys & F_MODE && (p->fts_statp->st_mode & MBITS) != mode)
output(fp, indent, &offset, "mode=%#o",
p->fts_statp->st_mode & MBITS);
if (keys & F_DEV &&
(S_ISBLK(p->fts_statp->st_mode) || S_ISCHR(p->fts_statp->st_mode)))
output(fp, indent, &offset, "device=%#jx",
(uintmax_t)p->fts_statp->st_rdev);
if (keys & F_NLINK && p->fts_statp->st_nlink != 1)
output(fp, indent, &offset, "nlink=%ju",
(uintmax_t)p->fts_statp->st_nlink);
if (keys & F_SIZE &&
(flavor == F_FREEBSD9 || S_ISREG(p->fts_statp->st_mode)))
output(fp, indent, &offset, "size=%ju",
(uintmax_t)p->fts_statp->st_size);
if (keys & F_TIME)
#if defined(BSD4_4) && !defined(HAVE_NBTOOL_CONFIG_H)
output(fp, indent, &offset, "time=%jd.%09ld",
(intmax_t)p->fts_statp->st_mtimespec.tv_sec,
p->fts_statp->st_mtimespec.tv_nsec);
#else
output(fp, indent, &offset, "time=%jd.%09ld",
(intmax_t)p->fts_statp->st_mtime, (long)0);
#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))
mtree_err("%s: %s", p->fts_accpath, strerror(errno));
close(fd);
output(fp, indent, &offset, "cksum=%lu", (long)val);
}
#ifndef NO_MD5
if (keys & F_MD5 && S_ISREG(p->fts_statp->st_mode)) {
if ((digestbuf = MD5File(p->fts_accpath, NULL)) == NULL)
mtree_err("%s: MD5File failed: %s", p->fts_accpath,
strerror(errno));
output(fp, indent, &offset, "%s=%s", MD5KEY, digestbuf);
free(digestbuf);
}
#endif /* ! NO_MD5 */
#ifndef NO_RMD160
if (keys & F_RMD160 && S_ISREG(p->fts_statp->st_mode)) {
if ((digestbuf = RMD160File(p->fts_accpath, NULL)) == NULL)
mtree_err("%s: RMD160File failed: %s", p->fts_accpath,
strerror(errno));
output(fp, indent, &offset, "%s=%s", RMD160KEY, digestbuf);
free(digestbuf);
}
#endif /* ! NO_RMD160 */
#ifndef NO_SHA1
if (keys & F_SHA1 && S_ISREG(p->fts_statp->st_mode)) {
if ((digestbuf = SHA1File(p->fts_accpath, NULL)) == NULL)
mtree_err("%s: SHA1File failed: %s", p->fts_accpath,
strerror(errno));
output(fp, indent, &offset, "%s=%s", SHA1KEY, digestbuf);
free(digestbuf);
}
#endif /* ! NO_SHA1 */
#ifndef NO_SHA2
if (keys & F_SHA256 && S_ISREG(p->fts_statp->st_mode)) {
if ((digestbuf = SHA256_File(p->fts_accpath, NULL)) == NULL)
mtree_err("%s: SHA256_File failed: %s", p->fts_accpath,
strerror(errno));
output(fp, indent, &offset, "%s=%s", SHA256KEY, digestbuf);
free(digestbuf);
}
#ifdef SHA384_BLOCK_LENGTH
if (keys & F_SHA384 && S_ISREG(p->fts_statp->st_mode)) {
if ((digestbuf = SHA384_File(p->fts_accpath, NULL)) == NULL)
mtree_err("%s: SHA384_File failed: %s", p->fts_accpath,
strerror(errno));
output(fp, indent, &offset, "%s=%s", SHA384KEY, digestbuf);
free(digestbuf);
}
#endif
if (keys & F_SHA512 && S_ISREG(p->fts_statp->st_mode)) {
if ((digestbuf = SHA512_File(p->fts_accpath, NULL)) == NULL)
mtree_err("%s: SHA512_File failed: %s", p->fts_accpath,
strerror(errno));
output(fp, indent, &offset, "%s=%s", SHA512KEY, digestbuf);
free(digestbuf);
}
#endif /* ! NO_SHA2 */
if (keys & F_SLINK &&
(p->fts_info == FTS_SL || p->fts_info == FTS_SLNONE))
output(fp, indent, &offset, "link=%s",
vispath(rlink(p->fts_accpath)));
#if HAVE_STRUCT_STAT_ST_FLAGS
if (keys & F_FLAGS && p->fts_statp->st_flags != flags) {
char *str = flags_to_string(p->fts_statp->st_flags, "none");
output(fp, indent, &offset, "flags=%s", str);
free(str);
}
#endif
putchar('\n');
}
/* XXX
* FLAGS2INDEX will fail once the user and system settable bits need more
* than one byte, respectively.
*/
#define FLAGS2INDEX(x) (((x >> 8) & 0x0000ff00) | (x & 0x000000ff))
#define MTREE_MAXGID 5000
#define MTREE_MAXUID 5000
#define MTREE_MAXMODE (MBITS + 1)
#if HAVE_STRUCT_STAT_ST_FLAGS
#define MTREE_MAXFLAGS (FLAGS2INDEX(CH_MASK) + 1) /* 1808 */
#else
#define MTREE_MAXFLAGS 1
#endif
#define MTREE_MAXS 16
static int
statd(FILE *fp, FTS *t, FTSENT *parent, uid_t *puid, gid_t *pgid, mode_t *pmode,
u_long *pflags)
{
FTSENT *p;
gid_t sgid;
uid_t suid;
mode_t smode;
u_long sflags = 0;
const char *name = NULL;
gid_t savegid;
uid_t saveuid;
mode_t savemode;
u_long saveflags;
u_short maxgid, maxuid, maxmode, maxflags;
u_short g[MTREE_MAXGID], u[MTREE_MAXUID],
m[MTREE_MAXMODE], f[MTREE_MAXFLAGS];
static int first = 1;
savegid = *pgid;
saveuid = *puid;
savemode = *pmode;
saveflags = *pflags;
if ((p = fts_children(t, 0)) == NULL) {
if (errno)
mtree_err("%s: %s", RP(parent), strerror(errno));
return (1);
}
memset(g, 0, sizeof(g));
memset(u, 0, sizeof(u));
memset(m, 0, sizeof(m));
memset(f, 0, sizeof(f));
maxuid = maxgid = maxmode = maxflags = 0;
for (; p; p = p->fts_link) {
if (flavor == F_NETBSD6 || !dflag ||
(dflag && S_ISDIR(p->fts_statp->st_mode))) {
smode = p->fts_statp->st_mode & MBITS;
if (smode < MTREE_MAXMODE && ++m[smode] > maxmode) {
savemode = smode;
maxmode = m[smode];
}
sgid = p->fts_statp->st_gid;
if (sgid < MTREE_MAXGID && ++g[sgid] > maxgid) {
savegid = sgid;
maxgid = g[sgid];
}
suid = p->fts_statp->st_uid;
if (suid < MTREE_MAXUID && ++u[suid] > maxuid) {
saveuid = suid;
maxuid = u[suid];
}
#if HAVE_STRUCT_STAT_ST_FLAGS
sflags = FLAGS2INDEX(p->fts_statp->st_flags);
if (sflags < MTREE_MAXFLAGS && ++f[sflags] > maxflags) {
saveflags = p->fts_statp->st_flags;
maxflags = f[sflags];
}
#endif
}
}
/*
* 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 | F_UID)) && (*puid != saveuid)) ||
((keys & (F_GNAME | F_GID)) && (*pgid != savegid)) ||
((keys & F_MODE) && (*pmode != savemode)) ||
((keys & F_FLAGS) && (*pflags != saveflags)) ||
first) {
first = 0;
if (flavor != F_NETBSD6 && dflag)
fprintf(fp, "/set type=dir");
else
fprintf(fp, "/set type=file");
if (keys & (F_UID | F_UNAME)) {
if (keys & F_UNAME &&
(name = user_from_uid(saveuid, 1)) != NULL)
fprintf(fp, " uname=%s", name);
if (keys & F_UID || (keys & F_UNAME && name == NULL))
fprintf(fp, " uid=%lu", (u_long)saveuid);
}
if (keys & (F_GID | F_GNAME)) {
if (keys & F_GNAME &&
(name = group_from_gid(savegid, 1)) != NULL)
fprintf(fp, " gname=%s", name);
if (keys & F_GID || (keys & F_GNAME && name == NULL))
fprintf(fp, " gid=%lu", (u_long)savegid);
}
if (keys & F_MODE)
fprintf(fp, " mode=%#lo", (u_long)savemode);
if (keys & F_NLINK)
fprintf(fp, " nlink=1");
if (keys & F_FLAGS) {
char *str = flags_to_string(saveflags, "none");
fprintf(fp, " flags=%s", str);
free(str);
}
fprintf(fp, "\n");
*puid = saveuid;
*pgid = savegid;
*pmode = savemode;
*pflags = saveflags;
}
return (0);
}
/*
* dcmp --
* used as a comparison function passed to fts_open() to control
* the order in which fts_read() returns results. We make
* directories sort after non-directories, but otherwise sort in
* strcmp() order.
*
* Keep this in sync with nodecmp() in spec.c.
*/
static int
dcmp(const FTSENT *FTS_CONST *a, const FTSENT *FTS_CONST *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(FILE *fp, int indent, int *offset, const char *fmt, ...)
{
va_list ap;
char buf[1024];
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap);
if (*offset + strlen(buf) > MAXLINELEN - 3) {
fprintf(fp, " \\\n%*s", INDENTNAMELEN + indent, "");
*offset = INDENTNAMELEN + indent;
}
*offset += fprintf(fp, " %s", buf) + 1;
}
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