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/* $OpenBSD: main.c,v 1.66 2024/05/09 08:35:40 florian Exp $ */
/* $NetBSD: main.c,v 1.14 1997/06/05 11:13:24 lukem Exp $ */
/*-
* Copyright (c) 1980, 1991, 1993, 1994
* 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> /* MAXBSIZE DEV_BSIZE roundup */
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/disklabel.h>
#include <sys/dkio.h>
#include <ufs/ffs/fs.h>
#include <ufs/ufs/dinode.h>
#include <protocols/dumprestore.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <fstab.h>
#include <paths.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <limits.h>
#include <util.h>
#include "dump.h"
#include "pathnames.h"
int mapsize; /* size of the state maps */
char *usedinomap; /* map of allocated inodes */
char *dumpdirmap; /* map of directories to be dumped */
char *dumpinomap; /* map of files to be dumped */
char *disk; /* name of the disk file */
char *tape; /* name of the tape file */
char level; /* dump level of this dump */
int uflag; /* update flag */
int diskfd; /* disk file descriptor */
int pipeout; /* true => output to standard output */
int density = 0; /* density in bytes/0.1" */
int64_t tapesize; /* estimated tape size, blocks */
int64_t tsize; /* tape size in 0.1" units */
int etapes; /* estimated number of tapes */
int nonodump; /* if set, do not honor UF_NODUMP user flags */
int unlimited; /* if set, write to end of medium */
int notify = 0; /* notify operator flag */
int64_t blockswritten = 0; /* number of blocks written on current tape */
int tapeno = 0; /* current tape number */
int ntrec = NTREC; /* # tape blocks in each tape record */
int64_t blocksperfile; /* output blocks per file */
int cartridge = 0; /* Assume non-cartridge tape */
char *host = NULL; /* remote host (if any) */
time_t tstart_writing; /* when started writing the first tape block */
long xferrate; /* averaged transfer rate of all volumes */
struct fs *sblock; /* the file system super block */
char sblock_buf[MAXBSIZE];
int tp_bshift; /* log2(TP_BSIZE) */
char *duid; /* duid of the disk being dumped */
int maxbsize = 64*1024; /* XXX MAXBSIZE from sys/param.h */
struct disklabel lab;
/*
* Possible superblock locations ordered from most to least likely.
*/
static int sblock_try[] = SBLOCKSEARCH;
static long long numarg(char *, long long, long long);
static void obsolete(int *, char **[]);
static void usage(void);
int
main(int argc, char *argv[])
{
ino_t ino;
int dirty;
union dinode *dp;
struct fstab *dt;
char *map;
int ch, mode;
struct tm then;
struct statfs fsbuf;
int i, anydirskipped, bflag = 0, Tflag = 0, honorlevel = 1;
ino_t maxino;
time_t t;
int dirlist;
char *toplevel, *str, *mount_point = NULL, *realpath, *ct;
int just_estimate = 0;
u_int64_t zero_uid = 0;
spcl.c_date = (int64_t)time(NULL);
tsize = 0; /* Default later, based on 'c' option for cart tapes */
if ((tape = getenv("TAPE")) == NULL)
tape = _PATH_DEFTAPE;
dumpdates = _PATH_DUMPDATES;
if (TP_BSIZE / DEV_BSIZE == 0 || TP_BSIZE % DEV_BSIZE != 0)
quit("TP_BSIZE must be a multiple of DEV_BSIZE\n");
level = '0';
if (argc < 2)
usage();
obsolete(&argc, &argv);
while ((ch = getopt(argc, argv, "0123456789aB:b:cd:f:h:ns:ST:uWw")) != -1)
switch (ch) {
/* dump level */
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
level = ch;
break;
case 'B': /* blocks per output file */
blocksperfile = numarg("blocks per file", 1, 0);
break;
case 'b': /* blocks per tape write */
ntrec = numarg("blocks per write", 1, 1000);
if (ntrec > maxbsize/1024) {
msg("Please choose a blocksize <= %dKB\n",
maxbsize/1024);
exit(X_STARTUP);
}
bflag = 1;
break;
case 'c': /* Tape is cart. not 9-track */
cartridge = 1;
break;
case 'd': /* density, in bits per inch */
density = numarg("density", 10, 327670) / 10;
if (density >= 625 && !bflag)
ntrec = HIGHDENSITYTREC;
break;
case 'f': /* output file */
tape = optarg;
break;
case 'h':
honorlevel = numarg("honor level", 0, 10);
break;
case 'n': /* notify operators */
notify = 1;
break;
case 's': /* tape size, feet */
tsize = numarg("tape size", 1, 0) * 12 * 10;
break;
case 'S': /* estimate blocks and # of tapes */
just_estimate = 1;
break;
case 'T': /* time of last dump */
str = strptime(optarg, "%a %b %e %H:%M:%S %Y", &then);
then.tm_isdst = -1;
if (str == NULL || (*str != '\n' && *str != '\0'))
spcl.c_ddate = -1;
else
spcl.c_ddate = (int64_t)mktime(&then);
if (spcl.c_ddate < 0) {
(void)fprintf(stderr, "bad time \"%s\"\n",
optarg);
exit(X_STARTUP);
}
Tflag = 1;
lastlevel = '?';
break;
case 'u': /* update /etc/dumpdates */
uflag = 1;
break;
case 'W': /* what to do */
case 'w':
lastdump(ch);
exit(X_FINOK); /* do nothing else */
break;
case 'a': /* `auto-size', Write to EOM. */
unlimited = 1;
break;
default:
usage();
}
argc -= optind;
argv += optind;
if (argc < 1) {
(void)fprintf(stderr, "Must specify disk or filesystem\n");
exit(X_STARTUP);
}
/*
* determine if disk is a subdirectory, and setup appropriately
*/
dirlist = 0;
toplevel = NULL;
for (i = 0; i < argc; i++) {
struct stat sb;
/* Convert potential duid into a device name */
if ((diskfd = opendev(argv[i], O_RDONLY | O_NOFOLLOW, 0,
&realpath)) >= 0) {
argv[i] = strdup(realpath);
if (argv[i] == NULL) {
msg("Cannot malloc realpath\n");
exit(X_STARTUP);
}
(void)close(diskfd);
}
if (lstat(argv[i], &sb) == -1) {
msg("Cannot lstat %s: %s\n", argv[i], strerror(errno));
exit(X_STARTUP);
}
if (!S_ISDIR(sb.st_mode) && !S_ISREG(sb.st_mode))
break;
if (statfs(argv[i], &fsbuf) == -1) {
msg("Cannot statfs %s: %s\n", argv[i], strerror(errno));
exit(X_STARTUP);
}
if (strcmp(argv[i], fsbuf.f_mntonname) == 0) {
if (dirlist != 0) {
msg("Can't dump a mountpoint and a filelist\n");
exit(X_STARTUP);
}
break; /* exit if sole mountpoint */
}
if (!disk) {
if ((toplevel = strdup(fsbuf.f_mntonname)) == NULL) {
msg("Cannot malloc diskname\n");
exit(X_STARTUP);
}
disk = toplevel;
if (uflag) {
msg("Ignoring u flag for subdir dump\n");
uflag = 0;
}
if (level > '0') {
msg("Subdir dump is done at level 0\n");
level = '0';
}
msg("Dumping sub files/directories from %s\n", disk);
} else {
if (strcmp(disk, fsbuf.f_mntonname) != 0) {
msg("%s is not on %s\n", argv[i], disk);
exit(X_STARTUP);
}
}
msg("Dumping file/directory %s\n", argv[i]);
dirlist++;
}
if (dirlist == 0) {
disk = *argv++;
if (argc != 1) {
(void)fputs("Excess arguments to dump:", stderr);
while (--argc) {
(void)putc(' ', stderr);
(void)fputs(*argv++, stderr);
}
(void)putc('\n', stderr);
exit(X_STARTUP);
}
}
if (Tflag && uflag) {
(void)fprintf(stderr,
"You cannot use the T and u flags together.\n");
exit(X_STARTUP);
}
if (strcmp(tape, "-") == 0) {
pipeout++;
tape = "standard output";
}
if (blocksperfile)
blocksperfile = blocksperfile / ntrec * ntrec; /* round down */
else if (!unlimited) {
/*
* Determine how to default tape size and density
*
* density tape size
* 9-track 1600 bpi (160 bytes/.1") 2300 ft.
* 9-track 6250 bpi (625 bytes/.1") 2300 ft.
* cartridge 8000 bpi (800 bytes/.1") 1700 ft.
* (450*4 - slop)
*/
if (density == 0)
density = cartridge ? 100 : 160;
if (tsize == 0)
tsize = cartridge ? 1700L*120L : 2300L*120L;
}
if (strchr(tape, ':')) {
host = tape;
tape = strchr(host, ':');
*tape++ = '\0';
#ifdef RDUMP
if (rmthost(host) == 0)
exit(X_STARTUP);
#else
(void)fprintf(stderr, "remote dump not enabled\n");
exit(X_STARTUP);
#endif
}
if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
signal(SIGHUP, sig);
if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
signal(SIGTERM, sig);
if (signal(SIGINT, interrupt) == SIG_IGN)
signal(SIGINT, SIG_IGN);
getfstab(); /* /etc/fstab snarfed */
/*
* disk can be either the full special file name,
* the suffix of the special file name,
* the special name missing the leading '/',
* the file system name with or without the leading '/'.
*/
if (!statfs(disk, &fsbuf) && !strcmp(fsbuf.f_mntonname, disk)) {
/* mounted disk? */
disk = rawname(fsbuf.f_mntfromname);
if (!disk) {
(void)fprintf(stderr, "cannot get raw name for %s\n",
fsbuf.f_mntfromname);
exit(X_STARTUP);
}
mount_point = fsbuf.f_mntonname;
(void)strlcpy(spcl.c_dev, fsbuf.f_mntfromname,
sizeof(spcl.c_dev));
if (dirlist != 0) {
(void)snprintf(spcl.c_filesys, sizeof(spcl.c_filesys),
"a subset of %s", mount_point);
} else {
(void)strlcpy(spcl.c_filesys, mount_point,
sizeof(spcl.c_filesys));
}
} else if ((dt = fstabsearch(disk)) != NULL) {
/* in fstab? */
if (strchr(dt->fs_spec, '/')) {
/* fs_spec is a /dev/something */
disk = rawname(dt->fs_spec);
} else {
/* fs_spec is a DUID */
disk = rawname(disk);
}
mount_point = dt->fs_file;
(void)strlcpy(spcl.c_dev, dt->fs_spec, sizeof(spcl.c_dev));
if (dirlist != 0) {
(void)snprintf(spcl.c_filesys, sizeof(spcl.c_filesys),
"a subset of %s", mount_point);
} else {
(void)strlcpy(spcl.c_filesys, mount_point,
sizeof(spcl.c_filesys));
}
} else {
/* must be a device */
(void)strlcpy(spcl.c_dev, disk, sizeof(spcl.c_dev));
(void)strlcpy(spcl.c_filesys, "an unlisted file system",
sizeof(spcl.c_filesys));
}
(void)strlcpy(spcl.c_label, "none", sizeof(spcl.c_label));
(void)gethostname(spcl.c_host, sizeof(spcl.c_host));
spcl.c_level = level - '0';
spcl.c_type = TS_TAPE;
if ((diskfd = open(disk, O_RDONLY)) == -1) {
msg("Cannot open %s\n", disk);
exit(X_STARTUP);
}
if (ioctl(diskfd, DIOCGDINFO, (char *)&lab) == -1)
err(1, "ioctl (DIOCGDINFO)");
if (memcmp(lab.d_uid, &zero_uid, sizeof(lab.d_uid)) != 0) {
if (asprintf(&duid,
"%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx.%c",
lab.d_uid[0], lab.d_uid[1], lab.d_uid[2], lab.d_uid[3],
lab.d_uid[4], lab.d_uid[5], lab.d_uid[6], lab.d_uid[7],
disk[strlen(disk)-1]) == -1) {
msg("Cannot malloc duid\n");
exit(X_STARTUP);
}
}
if (!Tflag)
getdumptime(); /* /etc/dumpdates snarfed */
t = (time_t)spcl.c_date;
ct = ctime(&t);
msg("Date of this level %c dump: %s", level,
t == 0 ? "the epoch\n" : ct ? ct : "?\n");
t = (time_t)spcl.c_ddate;
ct = ctime(&t);
msg("Date of last level %c dump: %s", lastlevel,
t == 0 ? "the epoch\n" : ct ? ct : "?\n");
msg("Dumping %s ", disk);
if (mount_point != NULL)
msgtail("(%s) ", mount_point);
if (host)
msgtail("to %s on host %s\n", tape, host);
else
msgtail("to %s\n", tape);
if (ioctl(diskfd, DIOCGPDINFO, (char *)&lab) == -1)
err(1, "ioctl (DIOCGPDINFO)");
sync();
sblock = (struct fs *)sblock_buf;
for (i = 0; sblock_try[i] != -1; i++) {
ssize_t n = pread(diskfd, sblock, SBLOCKSIZE,
(off_t)sblock_try[i]);
if (n == SBLOCKSIZE && (sblock->fs_magic == FS_UFS1_MAGIC ||
(sblock->fs_magic == FS_UFS2_MAGIC &&
sblock->fs_sblockloc == sblock_try[i])) &&
sblock->fs_bsize <= MAXBSIZE &&
sblock->fs_bsize >= sizeof(struct fs))
break;
}
if (sblock_try[i] == -1)
quit("Cannot find filesystem superblock\n");
tp_bshift = ffs(TP_BSIZE) - 1;
if (TP_BSIZE != (1 << tp_bshift))
quit("TP_BSIZE (%d) is not a power of 2\n", TP_BSIZE);
if (sblock->fs_magic == FS_UFS2_MAGIC ||
sblock->fs_inodefmt >= FS_44INODEFMT)
spcl.c_flags |= DR_NEWINODEFMT;
maxino = (ino_t)sblock->fs_ipg * sblock->fs_ncg;
mapsize = roundup(howmany(maxino, NBBY), TP_BSIZE);
usedinomap = calloc((unsigned) mapsize, sizeof(char));
dumpdirmap = calloc((unsigned) mapsize, sizeof(char));
dumpinomap = calloc((unsigned) mapsize, sizeof(char));
if (usedinomap == NULL || dumpdirmap == NULL || dumpinomap == NULL)
quit("Failed to allocate tables");
tapesize = 3 * (howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
nonodump = spcl.c_level < honorlevel;
(void)signal(SIGINFO, statussig);
msg("mapping (Pass I) [regular files]\n");
anydirskipped = mapfiles(maxino, &tapesize, toplevel,
(dirlist ? argv : NULL));
msg("mapping (Pass II) [directories]\n");
while (anydirskipped) {
anydirskipped = mapdirs(maxino, &tapesize);
}
if (pipeout || unlimited) {
tapesize += 10; /* 10 trailer blocks */
msg("estimated %lld tape blocks.\n", tapesize);
} else {
double fetapes;
if (blocksperfile)
fetapes = (double) tapesize / blocksperfile;
else if (cartridge) {
/* Estimate number of tapes, assuming streaming stops at
the end of each block written, and not in mid-block.
Assume no erroneous blocks; this can be compensated
for with an artificially low tape size. */
fetapes =
( tapesize /* blocks */
* TP_BSIZE /* bytes/block */
* (1.0/density) /* 0.1" / byte */
+
tapesize /* blocks */
* (1.0/ntrec) /* streaming-stops per block */
* 15.48 /* 0.1" / streaming-stop */
) * (1.0 / tsize ); /* tape / 0.1" */
} else {
/* Estimate number of tapes, for old fashioned 9-track
tape */
int tenthsperirg = (density == 625) ? 3 : 7;
fetapes =
( tapesize /* blocks */
* TP_BSIZE /* bytes / block */
* (1.0/density) /* 0.1" / byte */
+
tapesize /* blocks */
* (1.0/ntrec) /* IRG's / block */
* tenthsperirg /* 0.1" / IRG */
) * (1.0 / tsize ); /* tape / 0.1" */
}
etapes = fetapes; /* truncating assignment */
etapes++;
/* count the dumped inodes map on each additional tape */
tapesize += (etapes - 1) *
(howmany(mapsize * sizeof(char), TP_BSIZE) + 1);
tapesize += etapes + 10; /* headers + 10 trailer blks */
msg("estimated %lld tape blocks on %3.2f tape(s).\n",
tapesize, fetapes);
}
/*
* Exit if user wants an estimate of blocks and # of tapes only.
*/
if (just_estimate)
exit(X_FINOK);
/*
* Allocate tape buffer.
*/
if (!alloctape())
quit("can't allocate tape buffers - try a smaller blocking factor.\n");
startnewtape(1);
(void)time(&tstart_writing);
xferrate = 0;
dumpmap(usedinomap, TS_CLRI, maxino - 1);
msg("dumping (Pass III) [directories]\n");
dirty = 0; /* XXX just to get gcc to shut up */
for (map = dumpdirmap, ino = 1; ino < maxino; ino++) {
if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */
dirty = *map++;
else
dirty >>= 1;
if ((dirty & 1) == 0)
continue;
/*
* Skip directory inodes deleted and maybe reallocated
*/
dp = getino(ino, &mode);
if (mode != IFDIR)
continue;
(void)dumpino(dp, ino);
}
msg("dumping (Pass IV) [regular files]\n");
for (map = dumpinomap, ino = 1; ino < maxino; ino++) {
if (((ino - 1) % NBBY) == 0) /* map is offset by 1 */
dirty = *map++;
else
dirty >>= 1;
if ((dirty & 1) == 0)
continue;
/*
* Skip inodes deleted and reallocated as directories.
*/
dp = getino(ino, &mode);
if (mode == IFDIR)
continue;
(void)dumpino(dp, ino);
}
spcl.c_type = TS_END;
for (i = 0; i < ntrec; i++)
writeheader(maxino - 1);
if (pipeout)
msg("%lld tape blocks\n", spcl.c_tapea);
else
msg("%lld tape blocks on %d volume%s\n",
spcl.c_tapea, spcl.c_volume,
(spcl.c_volume == 1) ? "" : "s");
t = (time_t)spcl.c_date;
ct = ctime(&t);
msg("Date of this level %c dump: %s", level,
t == 0 ? "the epoch\n" : ct ? ct : "?\n");
t = do_stats();
ct = ctime(&t);
msg("Date this dump completed: %s", ct ? ct : "?\n");
msg("Average transfer rate: %ld KB/s\n", xferrate / tapeno);
putdumptime();
trewind();
broadcast("DUMP IS DONE!\7\7\n");
msg("DUMP IS DONE\n");
Exit(X_FINOK);
/* NOTREACHED */
}
static void
usage(void)
{
extern char *__progname;
(void)fprintf(stderr, "usage: %s [-0123456789acnSuWw] [-B records] "
"[-b blocksize] [-d density]\n"
"\t[-f file] [-h level] [-s feet] "
"[-T date] files-to-dump\n",
__progname);
exit(X_STARTUP);
}
/*
* Pick up a numeric argument. It must be nonnegative and in the given
* range (except that a vmax of 0 means unlimited).
*/
static long long
numarg(char *meaning, long long vmin, long long vmax)
{
long long val;
const char *errstr;
if (vmax == 0)
vmax = LLONG_MAX;
val = strtonum(optarg, vmin, vmax, &errstr);
if (errstr)
errx(X_STARTUP, "%s is %s [%lld - %lld]",
meaning, errstr, vmin, vmax);
return (val);
}
void
sig(int signo)
{
switch(signo) {
case SIGALRM:
case SIGHUP:
case SIGTERM:
/* XXX signal race */
if (pipeout)
quit("Signal on pipe: cannot recover\n");
msg("Rewriting attempted as response to unknown signal.\n");
(void)fflush(stderr);
(void)fflush(stdout);
close_rewind();
exit(X_REWRITE);
/* NOTREACHED */
}
}
char *
rawname(char *cp)
{
static char rawbuf[PATH_MAX];
char *dp = strrchr(cp, '/');
char *prefix;
if (dp == NULL)
return (NULL);
prefix = dp[1] == 'r' ? "" : "r";
*dp = '\0';
(void)snprintf(rawbuf, sizeof(rawbuf), "%s/%s%s", cp, prefix, dp + 1);
*dp = '/';
return (rawbuf);
}
char *
getduid(char *path)
{
int fd;
struct disklabel lab;
u_int64_t zero_uid = 0;
char *duid;
if ((fd = opendev(path, O_RDONLY | O_NOFOLLOW, 0, NULL)) >= 0) {
if (ioctl(fd, DIOCGDINFO, (char *)&lab) == -1) {
close(fd);
warn("ioctl(DIOCGDINFO)");
return (NULL);
}
close(fd);
if (memcmp(lab.d_uid, &zero_uid, sizeof(lab.d_uid)) != 0) {
if (asprintf(&duid,
"%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx.%c",
lab.d_uid[0], lab.d_uid[1], lab.d_uid[2],
lab.d_uid[3], lab.d_uid[4], lab.d_uid[5],
lab.d_uid[6], lab.d_uid[7],
path[strlen(path)-1]) == -1) {
warn("Cannot malloc duid");
return (NULL);
}
return (duid);
}
}
return (NULL);
}
/*
* obsolete --
* Change set of key letters and ordered arguments into something
* getopt(3) will like.
*/
static void
obsolete(int *argcp, char **argvp[])
{
int argc, flags;
char *ap, **argv, *flagsp, **nargv, *p;
size_t len;
/* Setup. */
argv = *argvp;
argc = *argcp;
/* Return if no args or first argument has leading dash or a slash. */
ap = argv[1];
if (argc == 1 || *ap == '-' || strchr(ap, '/') != NULL)
return;
/* Allocate space for new arguments. */
if ((*argvp = nargv = calloc(argc + 1, sizeof(char *))) == NULL ||
(p = flagsp = malloc(strlen(ap) + 2)) == NULL)
err(1, NULL);
*nargv++ = *argv;
argv += 2;
for (flags = 0; *ap; ++ap) {
switch (*ap) {
case 'B':
case 'b':
case 'd':
case 'f':
case 'h':
case 's':
case 'T':
if (*argv == NULL) {
warnx("option requires an argument -- %c", *ap);
usage();
}
len = 2 + strlen(*argv) + 1;
if ((nargv[0] = malloc(len)) == NULL)
err(1, NULL);
nargv[0][0] = '-';
nargv[0][1] = *ap;
(void)strlcpy(&nargv[0][2], *argv, len - 2);
++argv;
++nargv;
break;
default:
if (!flags) {
*p++ = '-';
flags = 1;
}
*p++ = *ap;
break;
}
}
/* Terminate flags, or toss the buffer we did not use. */
if (flags) {
*p = '\0';
*nargv++ = flagsp;
} else
free(flagsp);
/* Copy remaining arguments. */
while ((*nargv++ = *argv++))
continue;
/* Update argument count. */
*argcp = nargv - *argvp - 1;
}
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