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Editing: fetch.c
/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 2000-2014 Dag-Erling Smørgrav * Copyright (c) 2013 Michael Gmelin <freebsd@grem.de> * 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 * in this position and unchanged. * 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. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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> __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/socket.h> #include <sys/stat.h> #include <sys/time.h> #include <ctype.h> #include <err.h> #include <errno.h> #include <getopt.h> #include <signal.h> #include <stdint.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <termios.h> #include <unistd.h> #include <fetch.h> #define MINBUFSIZE 16384 #define TIMEOUT 120 /* Option flags */ static int A_flag; /* -A: do not follow 302 redirects */ static int a_flag; /* -a: auto retry */ static off_t B_size; /* -B: buffer size */ static int b_flag; /*! -b: workaround TCP bug */ static char *c_dirname; /* -c: remote directory */ static int d_flag; /* -d: direct connection */ static int F_flag; /* -F: restart without checking mtime */ static char *f_filename; /* -f: file to fetch */ static char *h_hostname; /* -h: host to fetch from */ static int i_flag; /* -i: specify file for mtime comparison */ static char *i_filename; /* name of input file */ static int l_flag; /* -l: link rather than copy file: URLs */ static int m_flag; /* -[Mm]: mirror mode */ static char *N_filename; /* -N: netrc file name */ static int n_flag; /* -n: do not preserve modification time */ static int o_flag; /* -o: specify output file */ static int o_directory; /* output file is a directory */ static char *o_filename; /* name of output file */ static int o_stdout; /* output file is stdout */ static int once_flag; /* -1: stop at first successful file */ static int p_flag; /* -[Pp]: use passive FTP */ static int R_flag; /* -R: don't delete partial files */ static int r_flag; /* -r: restart previous transfer */ static off_t S_size; /* -S: require size to match */ static int s_flag; /* -s: show size, don't fetch */ static long T_secs; /* -T: transfer timeout in seconds */ static int t_flag; /*! -t: workaround TCP bug */ static int U_flag; /* -U: do not use high ports */ static int v_level = 1; /* -v: verbosity level */ static int v_tty; /* stdout is a tty */ static int v_progress; /* whether to display progress */ static pid_t pgrp; /* our process group */ static long w_secs; /* -w: retry delay */ static int family = PF_UNSPEC; /* -[46]: address family to use */ static int sigalrm; /* SIGALRM received */ static int siginfo; /* SIGINFO received */ static int sigint; /* SIGINT received */ static long ftp_timeout = TIMEOUT; /* default timeout for FTP transfers */ static long http_timeout = TIMEOUT;/* default timeout for HTTP transfers */ static char *buf; /* transfer buffer */ enum options { OPTION_BIND_ADDRESS, OPTION_NO_FTP_PASSIVE_MODE, OPTION_HTTP_REFERER, OPTION_HTTP_USER_AGENT, OPTION_NO_PROXY, OPTION_SSL_CA_CERT_FILE, OPTION_SSL_CA_CERT_PATH, OPTION_SSL_CLIENT_CERT_FILE, OPTION_SSL_CLIENT_KEY_FILE, OPTION_SSL_CRL_FILE, OPTION_SSL_NO_SSL3, OPTION_SSL_NO_TLS1, OPTION_SSL_NO_VERIFY_HOSTNAME, OPTION_SSL_NO_VERIFY_PEER }; static struct option longopts[] = { /* mapping to single character argument */ { "one-file", no_argument, NULL, '1' }, { "ipv4-only", no_argument, NULL, '4' }, { "ipv6-only", no_argument, NULL, '6' }, { "no-redirect", no_argument, NULL, 'A' }, { "retry", no_argument, NULL, 'a' }, { "buffer-size", required_argument, NULL, 'B' }, /* -c not mapped, since it's deprecated */ { "direct", no_argument, NULL, 'd' }, { "force-restart", no_argument, NULL, 'F' }, /* -f not mapped, since it's deprecated */ /* -h not mapped, since it's deprecated */ { "if-modified-since", required_argument, NULL, 'i' }, { "symlink", no_argument, NULL, 'l' }, /* -M not mapped since it's the same as -m */ { "mirror", no_argument, NULL, 'm' }, { "netrc", required_argument, NULL, 'N' }, { "no-mtime", no_argument, NULL, 'n' }, { "output", required_argument, NULL, 'o' }, /* -P not mapped since it's the same as -p */ { "passive", no_argument, NULL, 'p' }, { "quiet", no_argument, NULL, 'q' }, { "keep-output", no_argument, NULL, 'R' }, { "restart", no_argument, NULL, 'r' }, { "require-size", required_argument, NULL, 'S' }, { "print-size", no_argument, NULL, 's' }, { "timeout", required_argument, NULL, 'T' }, { "passive-portrange-default", no_argument, NULL, 'T' }, { "verbose", no_argument, NULL, 'v' }, { "retry-delay", required_argument, NULL, 'w' }, /* options without a single character equivalent */ { "bind-address", required_argument, NULL, OPTION_BIND_ADDRESS }, { "no-passive", no_argument, NULL, OPTION_NO_FTP_PASSIVE_MODE }, { "referer", required_argument, NULL, OPTION_HTTP_REFERER }, { "user-agent", required_argument, NULL, OPTION_HTTP_USER_AGENT }, { "no-proxy", required_argument, NULL, OPTION_NO_PROXY }, { "ca-cert", required_argument, NULL, OPTION_SSL_CA_CERT_FILE }, { "ca-path", required_argument, NULL, OPTION_SSL_CA_CERT_PATH }, { "cert", required_argument, NULL, OPTION_SSL_CLIENT_CERT_FILE }, { "key", required_argument, NULL, OPTION_SSL_CLIENT_KEY_FILE }, { "crl", required_argument, NULL, OPTION_SSL_CRL_FILE }, { "no-sslv3", no_argument, NULL, OPTION_SSL_NO_SSL3 }, { "no-tlsv1", no_argument, NULL, OPTION_SSL_NO_TLS1 }, { "no-verify-hostname", no_argument, NULL, OPTION_SSL_NO_VERIFY_HOSTNAME }, { "no-verify-peer", no_argument, NULL, OPTION_SSL_NO_VERIFY_PEER }, { NULL, 0, NULL, 0 } }; /* * Signal handler */ static void sig_handler(int sig) { switch (sig) { case SIGALRM: sigalrm = 1; break; case SIGINFO: siginfo = 1; break; case SIGINT: sigint = 1; break; } } struct xferstat { char name[64]; struct timeval start; /* start of transfer */ struct timeval last; /* time of last update */ struct timeval last2; /* time of previous last update */ off_t size; /* size of file per HTTP hdr */ off_t offset; /* starting offset in file */ off_t rcvd; /* bytes already received */ off_t lastrcvd; /* bytes received since last update */ }; /* * Format a number of seconds as either XXdYYh, XXhYYm, XXmYYs, or XXs * depending on its magnitude */ static void stat_seconds(char *str, size_t strsz, long seconds) { if (seconds > 86400) snprintf(str, strsz, "%02ldd%02ldh", seconds / 86400, (seconds % 86400) / 3600); else if (seconds > 3600) snprintf(str, strsz, "%02ldh%02ldm", seconds / 3600, (seconds % 3600) / 60); else if (seconds > 60) snprintf(str, strsz, "%02ldm%02lds", seconds / 60, seconds % 60); else snprintf(str, strsz, " %02lds", seconds); } /* * Compute and display ETA */ static void stat_eta(char *str, size_t strsz, const struct xferstat *xs) { long elapsed, eta; off_t received, expected; elapsed = xs->last.tv_sec - xs->start.tv_sec; received = xs->rcvd - xs->offset; expected = xs->size - xs->rcvd; eta = (long)((double)elapsed * expected / received); if (eta > 0) stat_seconds(str, strsz, eta); else stat_seconds(str, strsz, elapsed); } /* * Format a number as "xxxx YB" where Y is ' ', 'k', 'M'... */ static const char *prefixes = " kMGTP"; static void stat_bytes(char *str, size_t strsz, off_t bytes) { const char *prefix = prefixes; while (bytes > 9999 && prefix[1] != '\0') { bytes /= 1024; prefix++; } snprintf(str, strsz, "%4ju %cB", (uintmax_t)bytes, *prefix); } /* * Compute and display transfer rate */ static void stat_bps(char *str, size_t strsz, struct xferstat *xs) { char bytes[16]; double delta, bps; delta = ((double)xs->last.tv_sec + (xs->last.tv_usec / 1.e6)) - ((double)xs->last2.tv_sec + (xs->last2.tv_usec / 1.e6)); if (delta == 0.0) { snprintf(str, strsz, "?? Bps"); } else { bps = (xs->rcvd - xs->lastrcvd) / delta; stat_bytes(bytes, sizeof bytes, (off_t)bps); snprintf(str, strsz, "%sps", bytes); } } /* * Update the stats display */ static void stat_display(struct xferstat *xs, int force) { char bytes[16], bps[16], eta[16]; struct timeval now; int ctty_pgrp; /* check if we're the foreground process */ if (ioctl(STDERR_FILENO, TIOCGPGRP, &ctty_pgrp) != 0 || (pid_t)ctty_pgrp != pgrp) return; gettimeofday(&now, NULL); if (!force && now.tv_sec <= xs->last.tv_sec) return; xs->last2 = xs->last; xs->last = now; fprintf(stderr, "\r%-46.46s", xs->name); if (xs->rcvd >= xs->size) { stat_bytes(bytes, sizeof bytes, xs->rcvd); setproctitle("%s [%s]", xs->name, bytes); fprintf(stderr, " %s", bytes); } else { stat_bytes(bytes, sizeof bytes, xs->size); setproctitle("%s [%d%% of %s]", xs->name, (int)((100.0 * xs->rcvd) / xs->size), bytes); fprintf(stderr, "%3d%% of %s", (int)((100.0 * xs->rcvd) / xs->size), bytes); } if (force == 2) { xs->lastrcvd = xs->offset; xs->last2 = xs->start; } stat_bps(bps, sizeof bps, xs); fprintf(stderr, " %s", bps); if ((xs->size > 0 && xs->rcvd > 0 && xs->last.tv_sec >= xs->start.tv_sec + 3) || force == 2) { stat_eta(eta, sizeof eta, xs); fprintf(stderr, " %s", eta); } xs->lastrcvd = xs->rcvd; } /* * Initialize the transfer statistics */ static void stat_start(struct xferstat *xs, const char *name, off_t size, off_t offset) { memset(xs, 0, sizeof *xs); snprintf(xs->name, sizeof xs->name, "%s", name); gettimeofday(&xs->start, NULL); xs->last2 = xs->last = xs->start; xs->size = size; xs->offset = offset; xs->rcvd = offset; xs->lastrcvd = offset; if (v_progress) stat_display(xs, 1); else if (v_level > 0) fprintf(stderr, "%-46s", xs->name); } /* * Update the transfer statistics */ static void stat_update(struct xferstat *xs, off_t rcvd) { xs->rcvd = rcvd; if (v_progress) stat_display(xs, 0); } /* * Finalize the transfer statistics */ static void stat_end(struct xferstat *xs) { char bytes[16], bps[16], eta[16]; gettimeofday(&xs->last, NULL); if (v_progress) { stat_display(xs, 2); putc('\n', stderr); } else if (v_level > 0) { stat_bytes(bytes, sizeof bytes, xs->rcvd); stat_bps(bps, sizeof bps, xs); stat_eta(eta, sizeof eta, xs); fprintf(stderr, " %s %s %s\n", bytes, bps, eta); } } /* * Ask the user for authentication details */ static int query_auth(struct url *URL) { struct termios tios; tcflag_t saved_flags; int i, nopwd; fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n", URL->scheme, URL->host, URL->port); fprintf(stderr, "Login: "); if (fgets(URL->user, sizeof URL->user, stdin) == NULL) return (-1); for (i = strlen(URL->user); i >= 0; --i) if (URL->user[i] == '\r' || URL->user[i] == '\n') URL->user[i] = '\0'; fprintf(stderr, "Password: "); if (tcgetattr(STDIN_FILENO, &tios) == 0) { saved_flags = tios.c_lflag; tios.c_lflag &= ~ECHO; tios.c_lflag |= ECHONL|ICANON; tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios); nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); tios.c_lflag = saved_flags; tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios); } else { nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); } if (nopwd) return (-1); for (i = strlen(URL->pwd); i >= 0; --i) if (URL->pwd[i] == '\r' || URL->pwd[i] == '\n') URL->pwd[i] = '\0'; return (0); } /* * Fetch a file */ static int fetch(char *URL, const char *path) { struct url *url; struct url_stat us; struct stat sb, nsb; struct xferstat xs; FILE *f, *of; size_t size, readcnt, wr; off_t count; char flags[8]; const char *slash; char *tmppath; int r; unsigned timeout; char *ptr; f = of = NULL; tmppath = NULL; timeout = 0; *flags = 0; count = 0; /* set verbosity level */ if (v_level > 1) strcat(flags, "v"); if (v_level > 2) fetchDebug = 1; /* parse URL */ url = NULL; if (*URL == '\0') { warnx("empty URL"); goto failure; } if ((url = fetchParseURL(URL)) == NULL) { warnx("%s: parse error", URL); goto failure; } /* if no scheme was specified, take a guess */ if (!*url->scheme) { if (!*url->host) strcpy(url->scheme, SCHEME_FILE); else if (strncasecmp(url->host, "ftp.", 4) == 0) strcpy(url->scheme, SCHEME_FTP); else if (strncasecmp(url->host, "www.", 4) == 0) strcpy(url->scheme, SCHEME_HTTP); } /* common flags */ switch (family) { case PF_INET: strcat(flags, "4"); break; case PF_INET6: strcat(flags, "6"); break; } /* FTP specific flags */ if (strcmp(url->scheme, SCHEME_FTP) == 0) { if (p_flag) strcat(flags, "p"); if (d_flag) strcat(flags, "d"); if (U_flag) strcat(flags, "l"); timeout = T_secs ? T_secs : ftp_timeout; } /* HTTP specific flags */ if (strcmp(url->scheme, SCHEME_HTTP) == 0 || strcmp(url->scheme, SCHEME_HTTPS) == 0) { if (d_flag) strcat(flags, "d"); if (A_flag) strcat(flags, "A"); timeout = T_secs ? T_secs : http_timeout; if (i_flag) { if (stat(i_filename, &sb)) { warn("%s: stat()", i_filename); goto failure; } url->ims_time = sb.st_mtime; strcat(flags, "i"); } } /* set the protocol timeout. */ fetchTimeout = timeout; /* just print size */ if (s_flag) { if (timeout) alarm(timeout); r = fetchStat(url, &us, flags); if (timeout) alarm(0); if (sigalrm || sigint) goto signal; if (r == -1) { warnx("%s", fetchLastErrString); goto failure; } if (us.size == -1) printf("Unknown\n"); else printf("%jd\n", (intmax_t)us.size); goto success; } /* * If the -r flag was specified, we have to compare the local * and remote files, so we should really do a fetchStat() * first, but I know of at least one HTTP server that only * sends the content size in response to GET requests, and * leaves it out of replies to HEAD requests. Also, in the * (frequent) case that the local and remote files match but * the local file is truncated, we have sufficient information * before the compare to issue a correct request. Therefore, * we always issue a GET request as if we were sure the local * file was a truncated copy of the remote file; we can drop * the connection later if we change our minds. */ sb.st_size = -1; if (!o_stdout) { r = stat(path, &sb); if (r == 0 && r_flag && S_ISREG(sb.st_mode)) { url->offset = sb.st_size; } else if (r == -1 || !S_ISREG(sb.st_mode)) { /* * Whatever value sb.st_size has now is either * wrong (if stat(2) failed) or irrelevant (if the * path does not refer to a regular file) */ sb.st_size = -1; } if (r == -1 && errno != ENOENT) { warnx("%s: stat()", path); goto failure; } } /* start the transfer */ if (timeout) alarm(timeout); f = fetchXGet(url, &us, flags); if (timeout) alarm(0); if (sigalrm || sigint) goto signal; if (f == NULL) { warnx("%s: %s", URL, fetchLastErrString); if (i_flag && (strcmp(url->scheme, SCHEME_HTTP) == 0 || strcmp(url->scheme, SCHEME_HTTPS) == 0) && fetchLastErrCode == FETCH_OK && strcmp(fetchLastErrString, "Not Modified") == 0) { /* HTTP Not Modified Response, return OK. */ r = 0; goto done; } else goto failure; } if (sigint) goto signal; /* check that size is as expected */ if (S_size) { if (us.size == -1) { warnx("%s: size unknown", URL); } else if (us.size != S_size) { warnx("%s: size mismatch: expected %jd, actual %jd", URL, (intmax_t)S_size, (intmax_t)us.size); goto failure; } } /* symlink instead of copy */ if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) { if (symlink(url->doc, path) == -1) { warn("%s: symlink()", path); goto failure; } goto success; } if (us.size == -1 && !o_stdout && v_level > 0) warnx("%s: size of remote file is not known", URL); if (v_level > 1) { if (sb.st_size != -1) fprintf(stderr, "local size / mtime: %jd / %ld\n", (intmax_t)sb.st_size, (long)sb.st_mtime); if (us.size != -1) fprintf(stderr, "remote size / mtime: %jd / %ld\n", (intmax_t)us.size, (long)us.mtime); } /* open output file */ if (o_stdout) { /* output to stdout */ of = stdout; } else if (r_flag && sb.st_size != -1) { /* resume mode, local file exists */ if (!F_flag && us.mtime && sb.st_mtime != us.mtime) { /* no match! have to refetch */ fclose(f); /* if precious, warn the user and give up */ if (R_flag) { warnx("%s: local modification time " "does not match remote", path); goto failure_keep; } } else if (url->offset > sb.st_size) { /* gap between what we asked for and what we got */ warnx("%s: gap in resume mode", URL); fclose(of); of = NULL; /* picked up again later */ } else if (us.size != -1) { if (us.size == sb.st_size) /* nothing to do */ goto success; if (sb.st_size > us.size) { /* local file too long! */ warnx("%s: local file (%jd bytes) is longer " "than remote file (%jd bytes)", path, (intmax_t)sb.st_size, (intmax_t)us.size); goto failure; } /* we got it, open local file */ if ((of = fopen(path, "r+")) == NULL) { warn("%s: fopen()", path); goto failure; } /* check that it didn't move under our feet */ if (fstat(fileno(of), &nsb) == -1) { /* can't happen! */ warn("%s: fstat()", path); goto failure; } if (nsb.st_dev != sb.st_dev || nsb.st_ino != sb.st_ino || nsb.st_size != sb.st_size) { warnx("%s: file has changed", URL); fclose(of); of = NULL; sb = nsb; /* picked up again later */ } } /* seek to where we left off */ if (of != NULL && fseeko(of, url->offset, SEEK_SET) != 0) { warn("%s: fseeko()", path); fclose(of); of = NULL; /* picked up again later */ } } else if (m_flag && sb.st_size != -1) { /* mirror mode, local file exists */ if (sb.st_size == us.size && sb.st_mtime == us.mtime) goto success; } if (of == NULL) { /* * We don't yet have an output file; either this is a * vanilla run with no special flags, or the local and * remote files didn't match. */ if (url->offset > 0) { /* * We tried to restart a transfer, but for * some reason gave up - so we have to restart * from scratch if we want the whole file */ url->offset = 0; if ((f = fetchXGet(url, &us, flags)) == NULL) { warnx("%s: %s", URL, fetchLastErrString); goto failure; } if (sigint) goto signal; } /* construct a temp file name */ if (sb.st_size != -1 && S_ISREG(sb.st_mode)) { if ((slash = strrchr(path, '/')) == NULL) slash = path; else ++slash; asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s", (int)(slash - path), path, slash); if (tmppath != NULL) { if (mkstemps(tmppath, strlen(slash) + 1) == -1) { warn("%s: mkstemps()", path); goto failure; } of = fopen(tmppath, "w"); chown(tmppath, sb.st_uid, sb.st_gid); chmod(tmppath, sb.st_mode & ALLPERMS); } } if (of == NULL) of = fopen(path, "w"); if (of == NULL) { warn("%s: open()", path); goto failure; } } count = url->offset; /* start the counter */ stat_start(&xs, path, us.size, count); sigalrm = siginfo = sigint = 0; /* suck in the data */ setvbuf(f, NULL, _IOFBF, B_size); signal(SIGINFO, sig_handler); while (!sigint) { if (us.size != -1 && us.size - count < B_size && us.size - count >= 0) size = us.size - count; else size = B_size; if (siginfo) { stat_end(&xs); siginfo = 0; } if (size == 0) break; if ((readcnt = fread(buf, 1, size, f)) < size) { if (ferror(f) && errno == EINTR && !sigint) clearerr(f); else if (readcnt == 0) break; } stat_update(&xs, count += readcnt); for (ptr = buf; readcnt > 0; ptr += wr, readcnt -= wr) if ((wr = fwrite(ptr, 1, readcnt, of)) < readcnt) { if (ferror(of) && errno == EINTR && !sigint) clearerr(of); else break; } if (readcnt != 0) break; } if (!sigalrm) sigalrm = ferror(f) && errno == ETIMEDOUT; signal(SIGINFO, SIG_DFL); stat_end(&xs); /* * If the transfer timed out or was interrupted, we still want to * set the mtime in case the file is not removed (-r or -R) and * the user later restarts the transfer. */ signal: /* set mtime of local file */ if (!n_flag && us.mtime && !o_stdout && of != NULL && (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { struct timeval tv[2]; fflush(of); tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); tv[1].tv_sec = (long)us.mtime; tv[0].tv_usec = tv[1].tv_usec = 0; if (utimes(tmppath ? tmppath : path, tv)) warn("%s: utimes()", tmppath ? tmppath : path); } /* timed out or interrupted? */ if (sigalrm) warnx("transfer timed out"); if (sigint) { warnx("transfer interrupted"); goto failure; } /* timeout / interrupt before connection completley established? */ if (f == NULL) goto failure; if (!sigalrm) { /* check the status of our files */ if (ferror(f)) warn("%s", URL); if (ferror(of)) warn("%s", path); if (ferror(f) || ferror(of)) goto failure; } /* did the transfer complete normally? */ if (us.size != -1 && count < us.size) { warnx("%s appears to be truncated: %jd/%jd bytes", path, (intmax_t)count, (intmax_t)us.size); goto failure_keep; } /* * If the transfer timed out and we didn't know how much to * expect, assume the worst (i.e. we didn't get all of it) */ if (sigalrm && us.size == -1) { warnx("%s may be truncated", path); goto failure_keep; } success: r = 0; if (tmppath != NULL && rename(tmppath, path) == -1) { warn("%s: rename()", path); goto failure_keep; } goto done; failure: if (of && of != stdout && !R_flag && !r_flag) if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) unlink(tmppath ? tmppath : path); if (R_flag && tmppath != NULL && sb.st_size == -1) rename(tmppath, path); /* ignore errors here */ failure_keep: r = -1; goto done; done: if (f) fclose(f); if (of && of != stdout) fclose(of); if (url) fetchFreeURL(url); if (tmppath != NULL) free(tmppath); return (r); } static void usage(void) { fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", "usage: fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [--bind-address=host]", " [--ca-cert=file] [--ca-path=dir] [--cert=file] [--crl=file]", " [-i file] [--key=file] [-N file] [--no-passive] [--no-proxy=list]", " [--no-sslv3] [--no-tlsv1] [--no-verify-hostname] [--no-verify-peer]", " [-o file] [--referer=URL] [-S bytes] [-T seconds]", " [--user-agent=agent-string] [-w seconds] URL ...", " fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [--bind-address=host]", " [--ca-cert=file] [--ca-path=dir] [--cert=file] [--crl=file]", " [-i file] [--key=file] [-N file] [--no-passive] [--no-proxy=list]", " [--no-sslv3] [--no-tlsv1] [--no-verify-hostname] [--no-verify-peer]", " [-o file] [--referer=URL] [-S bytes] [-T seconds]", " [--user-agent=agent-string] [-w seconds] -h host -f file [-c dir]"); } /* * Entry point */ int main(int argc, char *argv[]) { struct stat sb; struct sigaction sa; const char *p, *s; char *end, *q; int c, e, r; while ((c = getopt_long(argc, argv, "146AaB:bc:dFf:Hh:i:lMmN:nPpo:qRrS:sT:tUvw:", longopts, NULL)) != -1) switch (c) { case '1': once_flag = 1; break; case '4': family = PF_INET; break; case '6': family = PF_INET6; break; case 'A': A_flag = 1; break; case 'a': a_flag = 1; break; case 'B': B_size = (off_t)strtol(optarg, &end, 10); if (*optarg == '\0' || *end != '\0') errx(1, "invalid buffer size (%s)", optarg); break; case 'b': warnx("warning: the -b option is deprecated"); b_flag = 1; break; case 'c': c_dirname = optarg; break; case 'd': d_flag = 1; break; case 'F': F_flag = 1; break; case 'f': f_filename = optarg; break; case 'H': warnx("the -H option is now implicit, " "use -U to disable"); break; case 'h': h_hostname = optarg; break; case 'i': i_flag = 1; i_filename = optarg; break; case 'l': l_flag = 1; break; case 'o': o_flag = 1; o_filename = optarg; break; case 'M': case 'm': if (r_flag) errx(1, "the -m and -r flags " "are mutually exclusive"); m_flag = 1; break; case 'N': N_filename = optarg; break; case 'n': n_flag = 1; break; case 'P': case 'p': p_flag = 1; break; case 'q': v_level = 0; break; case 'R': R_flag = 1; break; case 'r': if (m_flag) errx(1, "the -m and -r flags " "are mutually exclusive"); r_flag = 1; break; case 'S': S_size = (off_t)strtol(optarg, &end, 10); if (*optarg == '\0' || *end != '\0') errx(1, "invalid size (%s)", optarg); break; case 's': s_flag = 1; break; case 'T': T_secs = strtol(optarg, &end, 10); if (*optarg == '\0' || *end != '\0') errx(1, "invalid timeout (%s)", optarg); break; case 't': t_flag = 1; warnx("warning: the -t option is deprecated"); break; case 'U': U_flag = 1; break; case 'v': v_level++; break; case 'w': a_flag = 1; w_secs = strtol(optarg, &end, 10); if (*optarg == '\0' || *end != '\0') errx(1, "invalid delay (%s)", optarg); break; case OPTION_BIND_ADDRESS: setenv("FETCH_BIND_ADDRESS", optarg, 1); break; case OPTION_NO_FTP_PASSIVE_MODE: setenv("FTP_PASSIVE_MODE", "no", 1); break; case OPTION_HTTP_REFERER: setenv("HTTP_REFERER", optarg, 1); break; case OPTION_HTTP_USER_AGENT: setenv("HTTP_USER_AGENT", optarg, 1); break; case OPTION_NO_PROXY: setenv("NO_PROXY", optarg, 1); break; case OPTION_SSL_CA_CERT_FILE: setenv("SSL_CA_CERT_FILE", optarg, 1); break; case OPTION_SSL_CA_CERT_PATH: setenv("SSL_CA_CERT_PATH", optarg, 1); break; case OPTION_SSL_CLIENT_CERT_FILE: setenv("SSL_CLIENT_CERT_FILE", optarg, 1); break; case OPTION_SSL_CLIENT_KEY_FILE: setenv("SSL_CLIENT_KEY_FILE", optarg, 1); break; case OPTION_SSL_CRL_FILE: setenv("SSL_CLIENT_CRL_FILE", optarg, 1); break; case OPTION_SSL_NO_SSL3: setenv("SSL_NO_SSL3", "", 1); break; case OPTION_SSL_NO_TLS1: setenv("SSL_NO_TLS1", "", 1); break; case OPTION_SSL_NO_VERIFY_HOSTNAME: setenv("SSL_NO_VERIFY_HOSTNAME", "", 1); break; case OPTION_SSL_NO_VERIFY_PEER: setenv("SSL_NO_VERIFY_PEER", "", 1); break; default: usage(); exit(1); } argc -= optind; argv += optind; if (h_hostname || f_filename || c_dirname) { if (!h_hostname || !f_filename || argc) { usage(); exit(1); } /* XXX this is a hack. */ if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) errx(1, "invalid hostname"); if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, c_dirname ? c_dirname : "", f_filename) == -1) errx(1, "%s", strerror(ENOMEM)); argc++; } if (!argc) { usage(); exit(1); } /* allocate buffer */ if (B_size < MINBUFSIZE) B_size = MINBUFSIZE; if ((buf = malloc(B_size)) == NULL) errx(1, "%s", strerror(ENOMEM)); /* timeouts */ if ((s = getenv("FTP_TIMEOUT")) != NULL) { ftp_timeout = strtol(s, &end, 10); if (*s == '\0' || *end != '\0' || ftp_timeout < 0) { warnx("FTP_TIMEOUT (%s) is not a positive integer", s); ftp_timeout = 0; } } if ((s = getenv("HTTP_TIMEOUT")) != NULL) { http_timeout = strtol(s, &end, 10); if (*s == '\0' || *end != '\0' || http_timeout < 0) { warnx("HTTP_TIMEOUT (%s) is not a positive integer", s); http_timeout = 0; } } /* signal handling */ sa.sa_flags = 0; sa.sa_handler = sig_handler; sigemptyset(&sa.sa_mask); sigaction(SIGALRM, &sa, NULL); sa.sa_flags = SA_RESETHAND; sigaction(SIGINT, &sa, NULL); fetchRestartCalls = 0; /* output file */ if (o_flag) { if (strcmp(o_filename, "-") == 0) { o_stdout = 1; } else if (stat(o_filename, &sb) == -1) { if (errno == ENOENT) { if (argc > 1) errx(1, "%s is not a directory", o_filename); } else { err(1, "%s", o_filename); } } else { if (sb.st_mode & S_IFDIR) o_directory = 1; } } /* check if output is to a tty (for progress report) */ v_tty = isatty(STDERR_FILENO); v_progress = v_tty && v_level > 0; if (v_progress) pgrp = getpgrp(); r = 0; /* authentication */ if (v_tty) fetchAuthMethod = query_auth; if (N_filename != NULL) if (setenv("NETRC", N_filename, 1) == -1) err(1, "setenv: cannot set NETRC=%s", N_filename); while (argc) { if ((p = strrchr(*argv, '/')) == NULL) p = *argv; else p++; if (!*p) p = "fetch.out"; fetchLastErrCode = 0; if (o_flag) { if (o_stdout) { e = fetch(*argv, "-"); } else if (o_directory) { asprintf(&q, "%s/%s", o_filename, p); e = fetch(*argv, q); free(q); } else { e = fetch(*argv, o_filename); } } else { e = fetch(*argv, p); } if (sigint) kill(getpid(), SIGINT); if (e == 0 && once_flag) exit(0); if (e) { r = 1; if ((fetchLastErrCode && fetchLastErrCode != FETCH_UNAVAIL && fetchLastErrCode != FETCH_MOVED && fetchLastErrCode != FETCH_URL && fetchLastErrCode != FETCH_RESOLV && fetchLastErrCode != FETCH_UNKNOWN)) { if (w_secs && v_level) fprintf(stderr, "Waiting %ld seconds " "before retrying\n", w_secs); if (w_secs) sleep(w_secs); if (a_flag) continue; } } argc--, argv++; } exit(r); }
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