/*      $NetBSD: rcp.c,v 1.53 2023/08/01 08:47:24 mrg Exp $     */

/*
 * Copyright (c) 1983, 1990, 1992, 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/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1983, 1990, 1992, 1993\
 The Regents of the University of California.  All rights reserved.");
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)rcp.c       8.2 (Berkeley) 4/2/94";
#else
__RCSID("$NetBSD: rcp.c,v 1.53 2023/08/01 08:47:24 mrg Exp $");
#endif
#endif /* not lint */

#include <sys/param.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>

#include <ctype.h>
#include <dirent.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <locale.h>
#include <netdb.h>
#include <paths.h>
#include <pwd.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "pathnames.h"
#include "extern.h"

#define OPTIONS "46dfprt"

struct passwd *pwd;
char *pwname;
u_short port;
uid_t   userid;
int errs, rem;
int pflag, iamremote, iamrecursive, targetshouldbedirectory;
int family = AF_UNSPEC;
static char dot[] = ".";

static sig_atomic_t print_info = 0;

#define CMDNEEDS        64
char cmd[CMDNEEDS];             /* must hold "rcp -r -p -d\0" */

int      response(void);
void     rsource(char *, struct stat *);
void     sink(int, char *[]);
void     source(int, char *[]);
void     tolocal(int, char *[]);
void     toremote(char *, int, char *[]);
void     usage(void);
static void     got_siginfo(int);
static void     progress(const char *, uintmax_t, uintmax_t);

int
main(int argc, char *argv[])
{
        struct servent *sp;
        int ch, fflag, tflag;
        char *targ;
        const char *shell;

        setprogname(argv[0]);
        (void)setlocale(LC_ALL, "");

        fflag = tflag = 0;
        while ((ch = getopt(argc, argv, OPTIONS)) != -1)
                switch(ch) {                    /* User-visible flags. */
                case '4':
                        family = AF_INET;
                        break;
                case '6':
                        family = AF_INET6;
                        break;
                case 'K':
                        break;
                case 'p':
                        pflag = 1;
                        break;
                case 'r':
                        iamrecursive = 1;
                        break;
                                                /* Server options. */
                case 'd':
                        targetshouldbedirectory = 1;
                        break;
                case 'f':                       /* "from" */
                        iamremote = 1;
                        fflag = 1;
                        break;
                case 't':                       /* "to" */
                        iamremote = 1;
                        tflag = 1;
                        break;
                case '?':
                default:
                        usage();
                }
        argc -= optind;
        argv += optind;

        sp = getservbyname(shell = "shell", "tcp");
        if (sp == NULL)
                errx(1, "%s/tcp: unknown service", shell);
        port = sp->s_port;

        if ((pwd = getpwuid(userid = getuid())) == NULL)
                errx(1, "unknown user %d", (int)userid);

        if ((pwname = strdup(pwd->pw_name)) == NULL)
                err(1, NULL);

        rem = STDIN_FILENO;             /* XXX */

        if (fflag) {                    /* Follow "protocol", send data. */
                (void)response();
                source(argc, argv);
                exit(errs);
        }

        if (tflag) {                    /* Receive data. */
                sink(argc, argv);
                exit(errs);
        }

        if (argc < 2)
                usage();
        if (argc > 2)
                targetshouldbedirectory = 1;

        rem = -1;
        /* Command to be executed on remote system using "rsh". */
        (void)snprintf(cmd, sizeof(cmd), "rcp%s%s%s",
            iamrecursive ? " -r" : "", pflag ? " -p" : "",
            targetshouldbedirectory ? " -d" : "");

        (void)signal(SIGPIPE, lostconn);
        (void)signal(SIGINFO, got_siginfo);

        if ((targ = colon(argv[argc - 1])) != NULL)/* Dest is remote host. */
                toremote(targ, argc, argv);
        else {
                tolocal(argc, argv);            /* Dest is local host. */
                if (targetshouldbedirectory)
                        verifydir(argv[argc - 1]);
        }
        exit(errs);
        /* NOTREACHED */
}

void
toremote(char *targ, int argc, char *argv[])
{
        int i;
        size_t len;
        char *bp, *host, *src, *suser, *thost, *tuser;

        *targ++ = 0;
        if (*targ == 0)
                targ = dot;

        if ((thost = strchr(argv[argc - 1], '@')) != NULL) {
                /* user@host */
                *thost++ = 0;
                tuser = argv[argc - 1];
                if (*tuser == '\0')
                        tuser = NULL;
                else if (!okname(tuser))
                        exit(1);
        } else {
                thost = argv[argc - 1];
                tuser = NULL;
        }
        thost = unbracket(thost);

        for (i = 0; i < argc - 1; i++) {
                src = colon(argv[i]);
                if (src) {                      /* remote to remote */
                        *src++ = 0;
                        if (*src == 0)
                                src = dot;
                        host = strchr(argv[i], '@');
                        len = strlen(_PATH_RSH) + strlen(argv[i]) +
                            strlen(src) + (tuser ? strlen(tuser) : 0) +
                            strlen(thost) + strlen(targ) + CMDNEEDS + 20;
                        if (!(bp = malloc(len)))
                                err(1, NULL);
                        if (host) {
                                *host++ = 0;
                                host = unbracket(host);
                                suser = argv[i];
                                if (*suser == '\0')
                                        suser = pwname;
                                else if (!okname(suser)) {
                                        (void)free(bp);
                                        continue;
                                }
                                (void)snprintf(bp, len,
                                    "%s %s -l %s -n %s %s '%s%s%s:%s'",
                                    _PATH_RSH, host, suser, cmd, src,
                                    tuser ? tuser : "", tuser ? "@" : "",
                                    thost, targ);
                        } else {
                                host = unbracket(argv[i]);
                                (void)snprintf(bp, len,
                                    "exec %s %s -n %s %s '%s%s%s:%s'",
                                    _PATH_RSH, argv[i], cmd, src,
                                    tuser ? tuser : "", tuser ? "@" : "",
                                    thost, targ);
                        }
                        (void)susystem(bp);
                        (void)free(bp);
                } else {                        /* local to remote */
                        if (rem == -1) {
                                len = strlen(targ) + CMDNEEDS + 20;
                                if (!(bp = malloc(len)))
                                        err(1, NULL);
                                (void)snprintf(bp, len, "%s -t %s", cmd, targ);
                                host = thost;
                                        rem = rcmd_af(&host, port, pwname,
                                            tuser ? tuser : pwname,
                                            bp, NULL, family);
                                if (rem < 0)
                                        exit(1);
                                if (response() < 0)
                                        exit(1);
                                (void)free(bp);
                        }
                        source(1, argv+i);
                }
        }
}

void
tolocal(int argc, char *argv[])
{
        int i;
        size_t len;
        char *bp, *host, *src, *suser;

        for (i = 0; i < argc - 1; i++) {
                if (!(src = colon(argv[i]))) {          /* Local to local. */
                        len = strlen(_PATH_CP) + strlen(argv[i]) +
                            strlen(argv[argc - 1]) + 20;
                        if (!(bp = malloc(len)))
                                err(1, NULL);
                        (void)snprintf(bp, len, "exec %s%s%s %s %s", _PATH_CP,
                            iamrecursive ? " -r" : "", pflag ? " -p" : "",
                            argv[i], argv[argc - 1]);
                        if (susystem(bp))
                                ++errs;
                        (void)free(bp);
                        continue;
                }
                *src++ = 0;
                if (*src == 0)
                        src = dot;
                if ((host = strchr(argv[i], '@')) == NULL) {
                        host = argv[i];
                        suser = pwname;
                } else {
                        *host++ = 0;
                        suser = argv[i];
                        if (*suser == '\0')
                                suser = pwname;
                        else if (!okname(suser))
                                continue;
                }
                host = unbracket(host);
                len = strlen(src) + CMDNEEDS + 20;
                if ((bp = malloc(len)) == NULL)
                        err(1, NULL);
                (void)snprintf(bp, len, "%s -f %s", cmd, src);
                rem = 
                        rcmd_af(&host, port, pwname, suser, bp, NULL, family);
                (void)free(bp);
                if (rem < 0) {
                        ++errs;
                        continue;
                }
                sink(1, argv + argc - 1);
                (void)close(rem);
                rem = -1;
        }
}

void
source(int argc, char *argv[])
{
        struct stat stb;
        static BUF buffer;
        BUF *bp;
        off_t i;
        off_t amt;
        size_t resid;
        ssize_t result;
        int fd, haderr, indx;
        char *last, *name, *cp, buf[BUFSIZ];

        for (indx = 0; indx < argc; ++indx) {
                name = argv[indx];
                if ((fd = open(name, O_RDONLY, 0)) < 0)
                        goto syserr;
                if (fstat(fd, &stb)) {
syserr:                 run_err("%s: %s", name, strerror(errno));
                        goto next;
                }
                switch (stb.st_mode & S_IFMT) {
                case S_IFREG:
                        break;
                case S_IFDIR:
                        if (iamrecursive) {
                                rsource(name, &stb);
                                goto next;
                        }
                        /* FALLTHROUGH */
                default:
                        run_err("%s: not a regular file", name);
                        goto next;
                }
                if ((last = strrchr(name, '/')) == NULL)
                        last = name;
                else
                        ++last;
                if (pflag) {
                        /*
                         * Make it compatible with possible future
                         * versions expecting microseconds.
                         */
                        (void)snprintf(buf, sizeof(buf), "T%lld %ld %lld %ld\n",
                            (long long)stb.st_mtimespec.tv_sec,
                            (long)stb.st_mtimespec.tv_nsec / 1000,
                            (long long)stb.st_atimespec.tv_sec,
                            (long)stb.st_atimespec.tv_nsec / 1000);
                        (void)write(rem, buf, strlen(buf));
                        if (response() < 0)
                                goto next;
                }
#define RCPMODEMASK     (S_ISUID|S_ISGID|S_ISTXT|S_IRWXU|S_IRWXG|S_IRWXO)
                (void)snprintf(buf, sizeof(buf), "C%04o %lld %s\n",
                    stb.st_mode & RCPMODEMASK, (long long)stb.st_size, last);
                (void)write(rem, buf, strlen(buf));
                if (response() < 0)
                        goto next;
                if ((bp = allocbuf(&buffer, fd, BUFSIZ)) == NULL) {
next:                   (void)close(fd);
                        continue;
                }

                /* Keep writing after an error so that we stay sync'd up. */
                haderr = 0;
                for (i = 0; i < stb.st_size; i += bp->cnt) {
                        if (print_info)
                                progress(name, i, stb.st_size);
                        amt = bp->cnt;
                        if (i + amt > stb.st_size)
                                amt = stb.st_size - i;
                        for (resid = (size_t)amt, cp = bp->buf; resid > 0;
                            resid -= result, cp += result) {
                                result = read(fd, cp, resid);
                                if (result == -1) {
                                        haderr = errno;
                                        goto error;
                                }
                        }
                        for (resid = (size_t)amt, cp = bp->buf; resid > 0;
                            resid -= result, cp += result) {
                                result = write(rem, cp, resid);
                                if (result == -1) {
                                        haderr = errno;
                                        goto error;
                                }
                        }
                }
 error:
                if (close(fd) && !haderr)
                        haderr = errno;
                if (!haderr)
                        (void)write(rem, "", 1);
                else
                        run_err("%s: %s", name, strerror(haderr));
                (void)response();
        }
}

void
rsource(char *name, struct stat *statp)
{
        DIR *dirp;
        struct dirent *dp;
        char *last, *vect[1], path[MAXPATHLEN];

        if (!(dirp = opendir(name))) {
                run_err("%s: %s", name, strerror(errno));
                return;
        }
        last = strrchr(name, '/');
        if (last == 0)
                last = name;
        else
                last++;
        if (pflag) {
                (void)snprintf(path, sizeof(path), "T%lld %ld %lld %ld\n",
                    (long long)statp->st_mtimespec.tv_sec,
                    (long)statp->st_mtimespec.tv_nsec / 1000,
                    (long long)statp->st_atimespec.tv_sec,
                    (long)statp->st_atimespec.tv_nsec / 1000);
                (void)write(rem, path, strlen(path));
                if (response() < 0) {
                        (void)closedir(dirp);
                        return;
                }
        }
        (void)snprintf(path, sizeof(path),
            "D%04o %d %s\n", statp->st_mode & RCPMODEMASK, 0, last);
        (void)write(rem, path, strlen(path));
        if (response() < 0) {
                (void)closedir(dirp);
                return;
        }
        while ((dp = readdir(dirp)) != NULL) {
                if (dp->d_ino == 0)
                        continue;
                if (!strcmp(dp->d_name, dot) || !strcmp(dp->d_name, ".."))
                        continue;
                if (snprintf(path, sizeof(path), "%s/%s", name, dp->d_name) >=
                    sizeof(path)) {
                        run_err("%s/%s: name too long", name, dp->d_name);
                        continue;
                }
                vect[0] = path;
                source(1, vect);
        }
        (void)closedir(dirp);
        (void)write(rem, "E\n", 2);
        (void)response();
}

void
sink(int argc, char *argv[])
{
        static BUF buffer;
        struct stat stb;
        struct timeval tv[2];
        BUF *bp;
        size_t resid;
        ssize_t result;
        off_t i;
        off_t amt;
        int exists, first, ofd;
        mode_t mask;
        mode_t mode;
        mode_t omode;
        int setimes, targisdir, wrerr;
        int wrerrno = 0;        /* pacify gcc */
        const char *wrcontext = NULL;
        char ch, *cp, *np, *targ, *vect[1], buf[BUFSIZ];
        const char *why;
        off_t size;
        char *namebuf = NULL;
        size_t cursize = 0;

#define atime   tv[0]
#define mtime   tv[1]
#define SCREWUP(str)    { why = str; goto screwup; }

        setimes = targisdir = 0;
        mask = umask(0);
        if (!pflag)
                (void)umask(mask);
        if (argc != 1) {
                run_err("ambiguous target");
                exit(1);
        }
        targ = *argv;
        if (targetshouldbedirectory)
                verifydir(targ);
        (void)write(rem, "", 1);
        if (stat(targ, &stb) == 0 && S_ISDIR(stb.st_mode))
                targisdir = 1;
        for (first = 1;; first = 0) {
                cp = buf;
                if (read(rem, cp, 1) <= 0)
                        goto out;
                if (*cp++ == '\n')
                        SCREWUP("unexpected <newline>");
                do {
                        if (read(rem, &ch, sizeof(ch)) != sizeof(ch))
                                SCREWUP("lost connection");
                        *cp++ = ch;
                } while (cp < &buf[BUFSIZ - 1] && ch != '\n');
                *cp = 0;

                if (buf[0] == '\01' || buf[0] == '\02') {
                        if (iamremote == 0)
                                (void)write(STDERR_FILENO,
                                    buf + 1, strlen(buf + 1));
                        if (buf[0] == '\02')
                                exit(1);
                        ++errs;
                        continue;
                }
                if (buf[0] == 'E') {
                        (void)write(rem, "", 1);
                        goto out;
                }

                if (ch == '\n')
                        *--cp = 0;

#define getnum(t) (t) = 0; while (isdigit((unsigned char)*cp)) (t) = (t) * 10 + (*cp++ - '0');
                cp = buf;
                if (*cp == 'T') {
                        setimes++;
                        cp++;
                        getnum(mtime.tv_sec);
                        if (*cp++ != ' ')
                                SCREWUP("mtime.sec not delimited");
                        getnum(mtime.tv_usec);
                        if (*cp++ != ' ')
                                SCREWUP("mtime.usec not delimited");
                        getnum(atime.tv_sec);
                        if (*cp++ != ' ')
                                SCREWUP("atime.sec not delimited");
                        getnum(atime.tv_usec);
                        if (*cp++ != '\0')
                                SCREWUP("atime.usec not delimited");
                        (void)write(rem, "", 1);
                        continue;
                }
                if (*cp != 'C' && *cp != 'D') {
                        /*
                         * Check for the case "rcp remote:foo\* local:bar".
                         * In this case, the line "No match." can be returned
                         * by the shell before the rcp command on the remote is
                         * executed so the ^Aerror_message convention isn't
                         * followed.
                         */
                        if (first) {
                                run_err("%s", cp);
                                exit(1);
                        }
                        SCREWUP("expected control record");
                }
                mode = 0;
                for (++cp; cp < buf + 5; cp++) {
                        if (*cp < '0' || *cp > '7')
                                SCREWUP("bad mode");
                        mode = (mode << 3) | (*cp - '0');
                }
                if (*cp++ != ' ')
                        SCREWUP("mode not delimited");

                for (size = 0; isdigit((unsigned char)*cp);)
                        size = size * 10 + (*cp++ - '0');
                if (*cp++ != ' ')
                        SCREWUP("size not delimited");
                if (targisdir) {
                        char *newnamebuf;
                        size_t need;

                        need = strlen(targ) + strlen(cp) + 2;
                        if (need > cursize) {
                                need += 256;
                                newnamebuf = realloc(namebuf, need);
                                if (newnamebuf != NULL) {
                                        namebuf = newnamebuf;
                                        cursize = need;
                                } else {
                                        run_err("%s", strerror(errno));
                                        exit(1);
                                }
                        }
                        (void)snprintf(namebuf, cursize, "%s%s%s", targ,
                            *targ ? "/" : "", cp);
                        np = namebuf;
                } else
                        np = targ;
                exists = stat(np, &stb) == 0;
                if (buf[0] == 'D') {
                        int mod_flag = pflag;
                        if (exists) {
                                if (!S_ISDIR(stb.st_mode)) {
                                        errno = ENOTDIR;
                                        goto bad;
                                }
                                if (pflag)
                                        (void)chmod(np, mode);
                        } else {
                                /* Handle copying from a read-only directory */
                                mod_flag = 1;
                                if (mkdir(np, mode | S_IRWXU) < 0)
                                        goto bad;
                        }
                        vect[0] = np;
                        sink(1, vect);
                        if (setimes) {
                                setimes = 0;
                                (void) utimes(np, tv);
                        }
                        if (mod_flag)
                                (void)chmod(np, mode);
                        continue;
                }
                omode = mode;
                mode |= S_IWRITE;
                if ((ofd = open(np, O_WRONLY|O_CREAT, mode)) < 0) {
bad:                    run_err("%s: %s", np, strerror(errno));
                        continue;
                }
                (void)write(rem, "", 1);
                if ((bp = allocbuf(&buffer, ofd, BUFSIZ)) == NULL) {
                        (void)close(ofd);
                        continue;
                }
                wrerr = 0;

/*
 * Like run_err(), but don't send any message to the remote end.
 * Instead, record the first error and send that in the end.
 */
#define RUN_ERR(w_context) do { \
        if (!wrerr) {                                                   \
                wrerrno = errno;                                        \
                wrcontext = w_context;                                  \
                wrerr = 1;                                              \
        }                                                               \
} while(0)

                for (i = 0; i < size; i += bp->cnt) {
                        if (print_info)
                                progress(np, i, size);
                        amt = bp->cnt;
                        if (i + amt > size)
                                amt = size - i;
                        for (resid = (size_t)amt, cp = bp->buf; resid > 0;
                            resid -= result, cp += result) {
                                result = read(rem, cp, resid);
                                if (result == -1) {
                                        run_err("%s", strerror(errno));
                                        exit(1);
                                }
                        }
                        for (resid = (size_t)amt, cp = bp->buf; resid > 0;
                            resid -= result, cp += result) {
                                /* Keep reading so we stay sync'd up. */
                                if (!wrerr) {
                                        result = write(ofd, cp, resid);
                                        if (result == -1) {
                                                RUN_ERR("write");
                                                goto error;
                                        }
                                }
                        }
                }
 error:
                if (ftruncate(ofd, size))
                        RUN_ERR("truncate");

                if (pflag) {
                        if (exists || omode != mode)
                                if (fchmod(ofd, omode))
                                        RUN_ERR("set mode");
                } else {
                        if (!exists && omode != mode)
                                if (fchmod(ofd, omode & ~mask))
                                        RUN_ERR("set mode");
                }
#ifndef __SVR4
                if (setimes && !wrerr) {
                        setimes = 0;
                        if (futimes(ofd, tv) < 0)
                                RUN_ERR("set times");
                }
#endif
                (void)close(ofd);
#ifdef __SVR4
                if (setimes && !wrerr) {
                        setimes = 0;
                        if (utimes(np, tv) < 0)
                                RUN_ERR("set times");
                }
#endif
                (void)response();
                if (wrerr)
                        run_err("%s: %s: %s", np, wrcontext, strerror(wrerrno));
                else
                        (void)write(rem, "", 1);
        }

out:
        if (namebuf) {
                free(namebuf);
        }
        return;

screwup:
        run_err("protocol error: %s", why);
        exit(1);
        /* NOTREACHED */
}


int
response(void)
{
        char ch, *cp, resp, rbuf[BUFSIZ];

        if (read(rem, &resp, sizeof(resp)) != sizeof(resp))
                lostconn(0);

        cp = rbuf;
        switch(resp) {
        case 0:                         /* ok */
                return (0);
        default:
                *cp++ = resp;
                /* FALLTHROUGH */
        case 1:                         /* error, followed by error msg */
        case 2:                         /* fatal error, "" */
                do {
                        if (read(rem, &ch, sizeof(ch)) != sizeof(ch))
                                lostconn(0);
                        *cp++ = ch;
                } while (cp < &rbuf[BUFSIZ] && ch != '\n');

                if (!iamremote)
                        (void)write(STDERR_FILENO, rbuf, (size_t)(cp - rbuf));
                ++errs;
                if (resp == 1)
                        return (-1);
                exit(1);
        }
        /* NOTREACHED */
}

void
usage(void)
{
        (void)fprintf(stderr,
            "usage: rcp [-46p] f1 f2; or: rcp [-46pr] f1 ... fn directory\n");
        exit(1);
        /* NOTREACHED */
}

#include <stdarg.h>


void
run_err(const char *fmt, ...)
{
        static FILE *fp;
        va_list ap;

        ++errs;
        if (fp == NULL && !(fp = fdopen(rem, "w")))
                return;

        va_start(ap, fmt);

        (void)fprintf(fp, "%c", 0x01);
        (void)fprintf(fp, "rcp: ");
        (void)vfprintf(fp, fmt, ap);
        (void)fprintf(fp, "\n");
        (void)fflush(fp);
        va_end(ap);

        if (!iamremote) {
                va_start(ap, fmt);
                vwarnx(fmt, ap);
                va_end(ap);
        }
}

static void
got_siginfo(int signo)
{

        print_info = 1;
}

static void
progress(const char *file, uintmax_t done, uintmax_t total)
{
        static int ttyfd = -2;
        const double pcent = (100.0 * done) / total;
        char buf[2048];
        int n;

        if (ttyfd == -2)
                ttyfd = open(_PATH_TTY, O_RDWR | O_CLOEXEC);

        if (ttyfd == -1)
                return;

        n = snprintf(buf, sizeof(buf),
            "%s: %s: %ju/%ju bytes %3.2f%% written\n",
            getprogname(), file, done, total, pcent);

        if (n < 0)
                return;

        write(ttyfd, buf, (size_t)n);

        print_info = 0;
}