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freebsd-skq/usr.sbin/fmtree/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

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/*-
* 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 0
#ifndef lint
static char sccsid[] = "@(#)create.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/stat.h>
#include <dirent.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <fts.h>
#include <grp.h>
#ifdef MD5
#include <md5.h>
#endif
#ifdef SHA1
#include <sha.h>
#endif
#ifdef RMD160
#include <ripemd.h>
#endif
#ifdef SHA256
#include <sha256.h>
#endif
#include <pwd.h>
#include <stdint.h>
#include <stdio.h>
#include <time.h>
#include <unistd.h>
#include <vis.h>
#include "mtree.h"
#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 = 0xffffffff;
static int dsort(const FTSENT * const *, const FTSENT * const *);
static void output(int, int *, const char *, ...) __printflike(3, 4);
static int statd(FTS *, FTSENT *, uid_t *, gid_t *, mode_t *, u_long *);
static void statf(int, FTSENT *);
void
cwalk(void)
{
FTS *t;
FTSENT *p;
time_t cl;
char *argv[2], host[MAXHOSTNAMELEN];
char dot[] = ".";
int indent = 0;
if (!nflag) {
(void)time(&cl);
(void)gethostname(host, sizeof(host));
(void)printf(
"#\t user: %s\n#\tmachine: %s\n",
getlogin(), host);
(void)printf(
"#\t tree: %s\n#\t date: %s",
fullpath, ctime(&cl));
}
argv[0] = dot;
argv[1] = NULL;
if ((t = fts_open(argv, ftsoptions, dsort)) == NULL)
err(1, "fts_open()");
while (errno = 0, (p = fts_read(t))) {
if (iflag)
indent = p->fts_level * 4;
if (check_excludes(p->fts_name, p->fts_path)) {
fts_set(t, p, FTS_SKIP);
continue;
}
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, &flags);
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:
warnx("%s: %s", p->fts_path, strerror(p->fts_errno));
break;
default:
if (!dflag)
statf(indent, p);
break;
}
}
if (errno != 0)
err(1, "fts_read()");
(void)fts_close(t);
if (sflag && keys & F_CKSUM)
warnx("%s checksum: %lu", fullpath, (unsigned long)crc_total);
}
static void
statf(int indent, FTSENT *p)
{
struct group *gr;
struct passwd *pw;
uint32_t val;
off_t len;
int fd, offset;
char *fflags;
char *escaped_name;
escaped_name = calloc(1, p->fts_namelen * 4 + 1);
if (escaped_name == NULL)
errx(1, "statf(): calloc() failed");
strvis(escaped_name, p->fts_name, VIS_WHITE | VIS_OCTAL | VIS_GLOB);
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) {
pw = getpwuid(p->fts_statp->st_uid);
if (pw != NULL)
output(indent, &offset, "uname=%s", pw->pw_name);
else if (wflag)
warnx("Could not get uname for uid=%u",
p->fts_statp->st_uid);
else
errx(1,
"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) {
gr = getgrgid(p->fts_statp->st_gid);
if (gr != NULL)
output(indent, &offset, "gname=%s", gr->gr_name);
else if (wflag)
warnx("Could not get gname for gid=%u",
p->fts_statp->st_gid);
else
errx(1,
"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=%ju",
(uintmax_t)p->fts_statp->st_nlink);
if (keys & F_SIZE && S_ISREG(p->fts_statp->st_mode))
output(indent, &offset, "size=%jd",
(intmax_t)p->fts_statp->st_size);
if (keys & F_TIME)
output(indent, &offset, "time=%ld.%09ld",
(long)p->fts_statp->st_mtim.tv_sec,
p->fts_statp->st_mtim.tv_nsec);
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))
err(1, "%s", p->fts_accpath);
(void)close(fd);
output(indent, &offset, "cksum=%lu", (unsigned long)val);
}
#ifdef MD5
if (keys & F_MD5 && S_ISREG(p->fts_statp->st_mode)) {
char *digest, buf[33];
digest = MD5File(p->fts_accpath, buf);
if (!digest)
err(1, "%s", p->fts_accpath);
output(indent, &offset, "md5digest=%s", digest);
}
#endif /* MD5 */
#ifdef SHA1
if (keys & F_SHA1 && S_ISREG(p->fts_statp->st_mode)) {
char *digest, buf[41];
digest = SHA1_File(p->fts_accpath, buf);
if (!digest)
err(1, "%s", p->fts_accpath);
output(indent, &offset, "sha1digest=%s", digest);
}
#endif /* SHA1 */
#ifdef RMD160
if (keys & F_RMD160 && S_ISREG(p->fts_statp->st_mode)) {
char *digest, buf[41];
digest = RIPEMD160_File(p->fts_accpath, buf);
if (!digest)
err(1, "%s", p->fts_accpath);
output(indent, &offset, "ripemd160digest=%s", digest);
}
#endif /* RMD160 */
#ifdef SHA256
if (keys & F_SHA256 && S_ISREG(p->fts_statp->st_mode)) {
char *digest, buf[65];
digest = SHA256_File(p->fts_accpath, buf);
if (!digest)
err(1, "%s", p->fts_accpath);
output(indent, &offset, "sha256digest=%s", digest);
}
#endif /* SHA256 */
if (keys & F_SLINK &&
(p->fts_info == FTS_SL || p->fts_info == FTS_SLNONE))
output(indent, &offset, "link=%s", rlink(p->fts_accpath));
if (keys & F_FLAGS && p->fts_statp->st_flags != flags) {
fflags = flags_to_string(p->fts_statp->st_flags);
output(indent, &offset, "flags=%s", fflags);
free(fflags);
}
(void)putchar('\n');
}
#define MAXGID 5000
#define MAXUID 5000
#define MAXMODE MBITS + 1
#define MAXFLAGS 256
#define MAXS 16
static int
statd(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;
struct group *gr;
struct passwd *pw;
gid_t savegid = *pgid;
uid_t saveuid = *puid;
mode_t savemode = *pmode;
u_long saveflags = *pflags;
u_short maxgid, maxuid, maxmode, maxflags;
u_short g[MAXGID], u[MAXUID], m[MAXMODE], f[MAXFLAGS];
char *fflags;
static int first = 1;
if ((p = fts_children(t, 0)) == NULL) {
if (errno)
err(1, "%s", RP(parent));
return (1);
}
bzero(g, sizeof(g));
bzero(u, sizeof(u));
bzero(m, sizeof(m));
bzero(f, sizeof(f));
maxuid = maxgid = maxmode = maxflags = 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];
}
/*
* XXX
* note that the below will break when file flags
* are extended beyond the first 4 bytes of each
* half word of the flags
*/
#define FLAGS2IDX(f) ((f & 0xf) | ((f >> 12) & 0xf0))
sflags = p->fts_statp->st_flags;
if (FLAGS2IDX(sflags) < MAXFLAGS &&
++f[FLAGS2IDX(sflags)] > maxflags) {
saveflags = sflags;
maxflags = f[FLAGS2IDX(sflags)];
}
}
}
/*
* 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)) ||
((keys & F_FLAGS) && (*pflags != saveflags)) ||
(first)) {
first = 0;
if (dflag)
(void)printf("/set type=dir");
else
(void)printf("/set type=file");
if (keys & F_UNAME) {
pw = getpwuid(saveuid);
if (pw != NULL)
(void)printf(" uname=%s", pw->pw_name);
else if (wflag)
warnx( "Could not get uname for uid=%u", saveuid);
else
errx(1, "Could not get uname for uid=%u", saveuid);
}
if (keys & F_UID)
(void)printf(" uid=%lu", (u_long)saveuid);
if (keys & F_GNAME) {
gr = getgrgid(savegid);
if (gr != NULL)
(void)printf(" gname=%s", gr->gr_name);
else if (wflag)
warnx("Could not get gname for gid=%u", savegid);
else
errx(1, "Could not get gname for gid=%u", savegid);
}
if (keys & F_GID)
(void)printf(" gid=%lu", (u_long)savegid);
if (keys & F_MODE)
(void)printf(" mode=%#o", savemode);
if (keys & F_NLINK)
(void)printf(" nlink=1");
if (keys & F_FLAGS) {
fflags = flags_to_string(saveflags);
(void)printf(" flags=%s", fflags);
free(fflags);
}
(void)printf("\n");
*puid = saveuid;
*pgid = savegid;
*pmode = savemode;
*pflags = saveflags;
}
return (0);
}
static int
dsort(const FTSENT * const *a, const FTSENT * 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));
}
#include <stdarg.h>
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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