fetch.c revision 225736
1247841Sbapt/*- 2262401Sbapt * Copyright (c) 2000-2004 Dag-Erling Co��dan Sm��rgrav 3257147Sbdrewery * All rights reserved. 4247841Sbapt * 5247841Sbapt * Redistribution and use in source and binary forms, with or without 6247841Sbapt * modification, are permitted provided that the following conditions 7247841Sbapt * are met: 8247841Sbapt * 1. Redistributions of source code must retain the above copyright 9247841Sbapt * notice, this list of conditions and the following disclaimer 10247841Sbapt * in this position and unchanged. 11247841Sbapt * 2. Redistributions in binary form must reproduce the above copyright 12247841Sbapt * notice, this list of conditions and the following disclaimer in the 13247841Sbapt * documentation and/or other materials provided with the distribution. 14247841Sbapt * 3. The name of the author may not be used to endorse or promote products 15247841Sbapt * derived from this software without specific prior written permission 16247841Sbapt * 17247841Sbapt * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18247841Sbapt * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19247841Sbapt * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20247841Sbapt * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21247841Sbapt * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22247841Sbapt * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23247841Sbapt * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24247841Sbapt * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25247841Sbapt * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26247841Sbapt * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27247841Sbapt */ 28247841Sbapt 29247841Sbapt#include <sys/cdefs.h> 30247841Sbapt__FBSDID("$FreeBSD: stable/9/usr.bin/fetch/fetch.c 225599 2011-09-15 22:50:31Z des $"); 31247841Sbapt 32260942Sbapt#include <sys/param.h> 33247841Sbapt#include <sys/socket.h> 34247841Sbapt#include <sys/stat.h> 35247841Sbapt#include <sys/time.h> 36259266Sbdrewery 37247841Sbapt#include <ctype.h> 38255457Sbapt#include <err.h> 39259266Sbdrewery#include <errno.h> 40262400Sbapt#include <signal.h> 41247841Sbapt#include <stdint.h> 42247841Sbapt#include <stdio.h> 43247841Sbapt#include <stdlib.h> 44247841Sbapt#include <string.h> 45247841Sbapt#include <termios.h> 46247841Sbapt#include <unistd.h> 47247841Sbapt 48247841Sbapt#include <fetch.h> 49247841Sbapt 50247841Sbapt#define MINBUFSIZE 4096 51247841Sbapt#define TIMEOUT 120 52247841Sbapt 53247841Sbapt/* Option flags */ 54247841Sbaptint A_flag; /* -A: do not follow 302 redirects */ 55247841Sbaptint a_flag; /* -a: auto retry */ 56247841Sbaptoff_t B_size; /* -B: buffer size */ 57259266Sbdreweryint b_flag; /*! -b: workaround TCP bug */ 58259266Sbdrewerychar *c_dirname; /* -c: remote directory */ 59259266Sbdreweryint d_flag; /* -d: direct connection */ 60259266Sbdreweryint F_flag; /* -F: restart without checking mtime */ 61259266Sbdrewerychar *f_filename; /* -f: file to fetch */ 62247841Sbaptchar *h_hostname; /* -h: host to fetch from */ 63247841Sbaptint i_flag; /* -i: specify input file for mtime comparison */ 64247841Sbaptchar *i_filename; /* name of input file */ 65247841Sbaptint l_flag; /* -l: link rather than copy file: URLs */ 66247841Sbaptint m_flag; /* -[Mm]: mirror mode */ 67259266Sbdrewerychar *N_filename; /* -N: netrc file name */ 68247841Sbaptint n_flag; /* -n: do not preserve modification time */ 69263180Sbdreweryint o_flag; /* -o: specify output file */ 70247841Sbaptint o_directory; /* output file is a directory */ 71247841Sbaptchar *o_filename; /* name of output file */ 72247841Sbaptint o_stdout; /* output file is stdout */ 73247841Sbaptint once_flag; /* -1: stop at first successful file */ 74247841Sbaptint p_flag; /* -[Pp]: use passive FTP */ 75247841Sbaptint R_flag; /* -R: don't delete partially transferred files */ 76257051Sbdreweryint r_flag; /* -r: restart previously interrupted transfer */ 77247841Sbaptoff_t S_size; /* -S: require size to match */ 78259266Sbdreweryint s_flag; /* -s: show size, don't fetch */ 79247841Sbaptlong T_secs; /* -T: transfer timeout in seconds */ 80263180Sbdreweryint t_flag; /*! -t: workaround TCP bug */ 81247841Sbaptint U_flag; /* -U: do not use high ports */ 82247841Sbaptint v_level = 1; /* -v: verbosity level */ 83247841Sbaptint v_tty; /* stdout is a tty */ 84247841Sbaptpid_t pgrp; /* our process group */ 85247841Sbaptlong w_secs; /* -w: retry delay */ 86247841Sbaptint family = PF_UNSPEC; /* -[46]: address family to use */ 87259266Sbdrewery 88247841Sbaptint sigalrm; /* SIGALRM received */ 89263180Sbdreweryint siginfo; /* SIGINFO received */ 90247841Sbaptint sigint; /* SIGINT received */ 91247841Sbapt 92247841Sbaptlong ftp_timeout = TIMEOUT; /* default timeout for FTP transfers */ 93247841Sbaptlong http_timeout = TIMEOUT; /* default timeout for HTTP transfers */ 94247841Sbaptchar *buf; /* transfer buffer */ 95247841Sbapt 96259266Sbdrewery 97247841Sbapt/* 98263180Sbdrewery * Signal handler 99247841Sbapt */ 100247841Sbaptstatic void 101247841Sbaptsig_handler(int sig) 102247841Sbapt{ 103247841Sbapt switch (sig) { 104247841Sbapt case SIGALRM: 105259266Sbdrewery sigalrm = 1; 106247841Sbapt break; 107263180Sbdrewery case SIGINFO: 108257147Sbdrewery siginfo = 1; 109257147Sbdrewery break; 110257147Sbdrewery case SIGINT: 111257147Sbdrewery sigint = 1; 112257147Sbdrewery break; 113257147Sbdrewery } 114259266Sbdrewery} 115257147Sbdrewery 116263180Sbdrewerystruct xferstat { 117257147Sbdrewery char name[64]; 118257147Sbdrewery struct timeval start; 119257147Sbdrewery struct timeval last; 120257147Sbdrewery off_t size; 121257147Sbdrewery off_t offset; 122257147Sbdrewery off_t rcvd; 123259266Sbdrewery}; 124257147Sbdrewery 125263180Sbdrewery/* 126257147Sbdrewery * Compute and display ETA 127259266Sbdrewery */ 128259266Sbdrewerystatic const char * 129259266Sbdrewerystat_eta(struct xferstat *xs) 130259266Sbdrewery{ 131259266Sbdrewery static char str[16]; 132259266Sbdrewery long elapsed, eta; 133259266Sbdrewery off_t received, expected; 134263180Sbdrewery 135259266Sbdrewery elapsed = xs->last.tv_sec - xs->start.tv_sec; 136247841Sbapt received = xs->rcvd - xs->offset; 137247841Sbapt expected = xs->size - xs->rcvd; 138247841Sbapt eta = (long)((double)elapsed * expected / received); 139247841Sbapt if (eta > 3600) 140247841Sbapt snprintf(str, sizeof str, "%02ldh%02ldm", 141247841Sbapt eta / 3600, (eta % 3600) / 60); 142247841Sbapt else 143247841Sbapt snprintf(str, sizeof str, "%02ldm%02lds", 144247841Sbapt eta / 60, eta % 60); 145247841Sbapt return (str); 146247841Sbapt} 147247841Sbapt 148247841Sbapt/* 149247841Sbapt * Format a number as "xxxx YB" where Y is ' ', 'k', 'M'... 150255457Sbapt */ 151255457Sbaptstatic const char *prefixes = " kMGTP"; 152255457Sbaptstatic const char * 153255457Sbaptstat_bytes(off_t bytes) 154255457Sbapt{ 155255457Sbapt static char str[16]; 156255457Sbapt const char *prefix = prefixes; 157255457Sbapt 158255457Sbapt while (bytes > 9999 && prefix[1] != '\0') { 159255457Sbapt bytes /= 1024; 160255457Sbapt prefix++; 161255457Sbapt } 162255457Sbapt snprintf(str, sizeof str, "%4jd %cB", (intmax_t)bytes, *prefix); 163255457Sbapt return (str); 164255457Sbapt} 165255457Sbapt 166255457Sbapt/* 167255457Sbapt * Compute and display transfer rate 168255457Sbapt */ 169255457Sbaptstatic const char * 170255457Sbaptstat_bps(struct xferstat *xs) 171255457Sbapt{ 172255457Sbapt static char str[16]; 173255457Sbapt double delta, bps; 174255457Sbapt 175255457Sbapt delta = (xs->last.tv_sec + (xs->last.tv_usec / 1.e6)) 176255457Sbapt - (xs->start.tv_sec + (xs->start.tv_usec / 1.e6)); 177255457Sbapt if (delta == 0.0) { 178255457Sbapt snprintf(str, sizeof str, "?? Bps"); 179255457Sbapt } else { 180255457Sbapt bps = (xs->rcvd - xs->offset) / delta; 181255457Sbapt snprintf(str, sizeof str, "%sps", stat_bytes((off_t)bps)); 182255457Sbapt } 183255457Sbapt return (str); 184255457Sbapt} 185255457Sbapt 186255457Sbapt/* 187255457Sbapt * Update the stats display 188255457Sbapt */ 189255457Sbaptstatic void 190255457Sbaptstat_display(struct xferstat *xs, int force) 191255457Sbapt{ 192255457Sbapt struct timeval now; 193255457Sbapt int ctty_pgrp; 194255457Sbapt 195255457Sbapt /* check if we're the foreground process */ 196255457Sbapt if (ioctl(STDERR_FILENO, TIOCGPGRP, &ctty_pgrp) == -1 || 197255457Sbapt (pid_t)ctty_pgrp != pgrp) 198255457Sbapt return; 199255457Sbapt 200255457Sbapt gettimeofday(&now, NULL); 201255457Sbapt if (!force && now.tv_sec <= xs->last.tv_sec) 202255457Sbapt return; 203255457Sbapt xs->last = now; 204255457Sbapt 205255457Sbapt fprintf(stderr, "\r%-46.46s", xs->name); 206255457Sbapt if (xs->size <= 0) { 207255457Sbapt setproctitle("%s [%s]", xs->name, stat_bytes(xs->rcvd)); 208255457Sbapt fprintf(stderr, " %s", stat_bytes(xs->rcvd)); 209255457Sbapt } else { 210255457Sbapt setproctitle("%s [%d%% of %s]", xs->name, 211255457Sbapt (int)((100.0 * xs->rcvd) / xs->size), 212255457Sbapt stat_bytes(xs->size)); 213255457Sbapt fprintf(stderr, "%3d%% of %s", 214255457Sbapt (int)((100.0 * xs->rcvd) / xs->size), 215255457Sbapt stat_bytes(xs->size)); 216255457Sbapt } 217255457Sbapt fprintf(stderr, " %s", stat_bps(xs)); 218255457Sbapt if (xs->size > 0 && xs->rcvd > 0 && 219255457Sbapt xs->last.tv_sec >= xs->start.tv_sec + 10) 220255457Sbapt fprintf(stderr, " %s", stat_eta(xs)); 221255457Sbapt} 222255457Sbapt 223255457Sbapt/* 224255457Sbapt * Initialize the transfer statistics 225255457Sbapt */ 226255457Sbaptstatic void 227255457Sbaptstat_start(struct xferstat *xs, const char *name, off_t size, off_t offset) 228255457Sbapt{ 229255457Sbapt snprintf(xs->name, sizeof xs->name, "%s", name); 230255457Sbapt gettimeofday(&xs->start, NULL); 231255457Sbapt xs->last.tv_sec = xs->last.tv_usec = 0; 232255457Sbapt xs->size = size; 233255457Sbapt xs->offset = offset; 234255457Sbapt xs->rcvd = offset; 235255457Sbapt if (v_tty && v_level > 0) 236255457Sbapt stat_display(xs, 1); 237255457Sbapt else if (v_level > 0) 238255457Sbapt fprintf(stderr, "%-46s", xs->name); 239255457Sbapt} 240255457Sbapt 241255457Sbapt/* 242255457Sbapt * Update the transfer statistics 243255457Sbapt */ 244255457Sbaptstatic void 245255457Sbaptstat_update(struct xferstat *xs, off_t rcvd) 246255457Sbapt{ 247255457Sbapt xs->rcvd = rcvd; 248255457Sbapt if (v_tty && v_level > 0) 249255457Sbapt stat_display(xs, 0); 250255457Sbapt} 251255457Sbapt 252255457Sbapt/* 253255457Sbapt * Finalize the transfer statistics 254255457Sbapt */ 255255457Sbaptstatic void 256255457Sbaptstat_end(struct xferstat *xs) 257255457Sbapt{ 258255457Sbapt gettimeofday(&xs->last, NULL); 259255457Sbapt if (v_tty && v_level > 0) { 260255457Sbapt stat_display(xs, 1); 261255457Sbapt putc('\n', stderr); 262255457Sbapt } else if (v_level > 0) { 263255457Sbapt fprintf(stderr, " %s %s\n", 264255457Sbapt stat_bytes(xs->size), stat_bps(xs)); 265255457Sbapt } 266255457Sbapt} 267255457Sbapt 268255457Sbapt/* 269255457Sbapt * Ask the user for authentication details 270255457Sbapt */ 271255457Sbaptstatic int 272255457Sbaptquery_auth(struct url *URL) 273255457Sbapt{ 274255457Sbapt struct termios tios; 275255457Sbapt tcflag_t saved_flags; 276255457Sbapt int i, nopwd; 277255457Sbapt 278255457Sbapt fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n", 279255457Sbapt URL->scheme, URL->host, URL->port); 280255457Sbapt 281255457Sbapt fprintf(stderr, "Login: "); 282247841Sbapt if (fgets(URL->user, sizeof URL->user, stdin) == NULL) 283247841Sbapt return (-1); 284247841Sbapt for (i = strlen(URL->user); i >= 0; --i) 285247841Sbapt if (URL->user[i] == '\r' || URL->user[i] == '\n') 286247841Sbapt URL->user[i] = '\0'; 287247841Sbapt 288247841Sbapt fprintf(stderr, "Password: "); 289247841Sbapt if (tcgetattr(STDIN_FILENO, &tios) == 0) { 290255457Sbapt saved_flags = tios.c_lflag; 291255457Sbapt tios.c_lflag &= ~ECHO; 292247841Sbapt tios.c_lflag |= ECHONL|ICANON; 293247841Sbapt tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios); 294247841Sbapt nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 295247841Sbapt tios.c_lflag = saved_flags; 296247841Sbapt tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios); 297247841Sbapt } else { 298247841Sbapt nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 299247841Sbapt } 300247841Sbapt if (nopwd) 301247841Sbapt return (-1); 302247841Sbapt for (i = strlen(URL->pwd); i >= 0; --i) 303247841Sbapt if (URL->pwd[i] == '\r' || URL->pwd[i] == '\n') 304247841Sbapt URL->pwd[i] = '\0'; 305247841Sbapt 306247841Sbapt return (0); 307247841Sbapt} 308247841Sbapt 309247841Sbapt/* 310247841Sbapt * Fetch a file 311247841Sbapt */ 312247841Sbaptstatic int 313247841Sbaptfetch(char *URL, const char *path) 314247841Sbapt{ 315247841Sbapt struct url *url; 316247841Sbapt struct url_stat us; 317247841Sbapt struct stat sb, nsb; 318247841Sbapt struct xferstat xs; 319247841Sbapt FILE *f, *of; 320247841Sbapt size_t size, wr; 321247841Sbapt off_t count; 322247841Sbapt char flags[8]; 323247841Sbapt const char *slash; 324247841Sbapt char *tmppath; 325247841Sbapt int r; 326247841Sbapt unsigned timeout; 327247841Sbapt char *ptr; 328247841Sbapt 329247841Sbapt f = of = NULL; 330247841Sbapt tmppath = NULL; 331247841Sbapt 332247841Sbapt timeout = 0; 333247841Sbapt *flags = 0; 334247841Sbapt count = 0; 335247841Sbapt 336247841Sbapt /* set verbosity level */ 337247841Sbapt if (v_level > 1) 338247841Sbapt strcat(flags, "v"); 339247841Sbapt if (v_level > 2) 340247841Sbapt fetchDebug = 1; 341247841Sbapt 342247841Sbapt /* parse URL */ 343247841Sbapt url = NULL; 344247841Sbapt if (*URL == '\0') { 345247841Sbapt warnx("empty URL"); 346247841Sbapt goto failure; 347247841Sbapt } 348247841Sbapt if ((url = fetchParseURL(URL)) == NULL) { 349247841Sbapt warnx("%s: parse error", URL); 350247841Sbapt goto failure; 351247841Sbapt } 352247841Sbapt 353247841Sbapt /* if no scheme was specified, take a guess */ 354247841Sbapt if (!*url->scheme) { 355247841Sbapt if (!*url->host) 356247841Sbapt strcpy(url->scheme, SCHEME_FILE); 357247841Sbapt else if (strncasecmp(url->host, "ftp.", 4) == 0) 358247841Sbapt strcpy(url->scheme, SCHEME_FTP); 359247841Sbapt else if (strncasecmp(url->host, "www.", 4) == 0) 360255457Sbapt strcpy(url->scheme, SCHEME_HTTP); 361255457Sbapt } 362247841Sbapt 363255457Sbapt /* common flags */ 364255457Sbapt switch (family) { 365255457Sbapt case PF_INET: 366255457Sbapt strcat(flags, "4"); 367255457Sbapt break; 368247841Sbapt case PF_INET6: 369247841Sbapt strcat(flags, "6"); 370247841Sbapt break; 371247841Sbapt } 372255457Sbapt 373255457Sbapt /* FTP specific flags */ 374255457Sbapt if (strcmp(url->scheme, SCHEME_FTP) == 0) { 375253755Sbapt if (p_flag) 376253755Sbapt strcat(flags, "p"); 377253755Sbapt if (d_flag) 378255457Sbapt strcat(flags, "d"); 379255457Sbapt if (U_flag) 380255457Sbapt strcat(flags, "l"); 381253755Sbapt timeout = T_secs ? T_secs : ftp_timeout; 382253755Sbapt } 383255457Sbapt 384255457Sbapt /* HTTP specific flags */ 385255457Sbapt if (strcmp(url->scheme, SCHEME_HTTP) == 0 || 386255457Sbapt strcmp(url->scheme, SCHEME_HTTPS) == 0) { 387255457Sbapt if (d_flag) 388255457Sbapt strcat(flags, "d"); 389255457Sbapt if (A_flag) 390255457Sbapt strcat(flags, "A"); 391255457Sbapt timeout = T_secs ? T_secs : http_timeout; 392255457Sbapt if (i_flag) { 393255457Sbapt if (stat(i_filename, &sb)) { 394255457Sbapt warn("%s: stat()", i_filename); 395255457Sbapt goto failure; 396255457Sbapt } 397255457Sbapt url->ims_time = sb.st_mtime; 398255457Sbapt strcat(flags, "i"); 399255457Sbapt } 400255457Sbapt } 401255457Sbapt 402255457Sbapt /* set the protocol timeout. */ 403255457Sbapt fetchTimeout = timeout; 404255457Sbapt 405255457Sbapt /* just print size */ 406255457Sbapt if (s_flag) { 407255457Sbapt if (timeout) 408255457Sbapt alarm(timeout); 409255457Sbapt r = fetchStat(url, &us, flags); 410255457Sbapt if (timeout) 411255457Sbapt alarm(0); 412255457Sbapt if (sigalrm || sigint) 413255457Sbapt goto signal; 414255457Sbapt if (r == -1) { 415255457Sbapt warnx("%s", fetchLastErrString); 416255457Sbapt goto failure; 417255457Sbapt } 418255457Sbapt if (us.size == -1) 419255457Sbapt printf("Unknown\n"); 420255457Sbapt else 421255457Sbapt printf("%jd\n", (intmax_t)us.size); 422255457Sbapt goto success; 423255457Sbapt } 424255457Sbapt 425255457Sbapt /* 426253755Sbapt * If the -r flag was specified, we have to compare the local 427253755Sbapt * and remote files, so we should really do a fetchStat() 428253755Sbapt * first, but I know of at least one HTTP server that only 429253755Sbapt * sends the content size in response to GET requests, and 430253755Sbapt * leaves it out of replies to HEAD requests. Also, in the 431253755Sbapt * (frequent) case that the local and remote files match but 432253755Sbapt * the local file is truncated, we have sufficient information 433253755Sbapt * before the compare to issue a correct request. Therefore, 434255457Sbapt * we always issue a GET request as if we were sure the local 435253755Sbapt * file was a truncated copy of the remote file; we can drop 436253755Sbapt * the connection later if we change our minds. 437247841Sbapt */ 438255457Sbapt sb.st_size = -1; 439255457Sbapt if (!o_stdout) { 440247841Sbapt r = stat(path, &sb); 441247841Sbapt if (r == 0 && r_flag && S_ISREG(sb.st_mode)) { 442247841Sbapt url->offset = sb.st_size; 443247841Sbapt } else if (r == -1 || !S_ISREG(sb.st_mode)) { 444247841Sbapt /* 445247841Sbapt * Whatever value sb.st_size has now is either 446247841Sbapt * wrong (if stat(2) failed) or irrelevant (if the 447247841Sbapt * path does not refer to a regular file) 448247841Sbapt */ 449247841Sbapt sb.st_size = -1; 450247841Sbapt } 451247841Sbapt if (r == -1 && errno != ENOENT) { 452247841Sbapt warnx("%s: stat()", path); 453247841Sbapt goto failure; 454247841Sbapt } 455247841Sbapt } 456247841Sbapt 457247841Sbapt /* start the transfer */ 458247841Sbapt if (timeout) 459247841Sbapt alarm(timeout); 460247841Sbapt f = fetchXGet(url, &us, flags); 461247841Sbapt if (timeout) 462247841Sbapt alarm(0); 463247841Sbapt if (sigalrm || sigint) 464255457Sbapt goto signal; 465255457Sbapt if (f == NULL) { 466255457Sbapt warnx("%s: %s", URL, fetchLastErrString); 467255457Sbapt if (i_flag && strcmp(url->scheme, SCHEME_HTTP) == 0 468255457Sbapt && fetchLastErrCode == FETCH_OK 469247841Sbapt && strcmp(fetchLastErrString, "Not Modified") == 0) { 470255457Sbapt /* HTTP Not Modified Response, return OK. */ 471255457Sbapt r = 0; 472255457Sbapt goto done; 473247841Sbapt } else 474247841Sbapt goto failure; 475247841Sbapt } 476247841Sbapt if (sigint) 477247841Sbapt goto signal; 478247841Sbapt 479247841Sbapt /* check that size is as expected */ 480247841Sbapt if (S_size) { 481247841Sbapt if (us.size == -1) { 482247841Sbapt warnx("%s: size unknown", URL); 483247841Sbapt } else if (us.size != S_size) { 484247841Sbapt warnx("%s: size mismatch: expected %jd, actual %jd", 485247841Sbapt URL, (intmax_t)S_size, (intmax_t)us.size); 486247841Sbapt goto failure; 487247841Sbapt } 488247841Sbapt } 489247841Sbapt 490247841Sbapt /* symlink instead of copy */ 491247841Sbapt if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) { 492247841Sbapt if (symlink(url->doc, path) == -1) { 493247841Sbapt warn("%s: symlink()", path); 494247841Sbapt goto failure; 495247841Sbapt } 496247841Sbapt goto success; 497247841Sbapt } 498247841Sbapt 499247841Sbapt if (us.size == -1 && !o_stdout && v_level > 0) 500247841Sbapt warnx("%s: size of remote file is not known", URL); 501247841Sbapt if (v_level > 1) { 502247841Sbapt if (sb.st_size != -1) 503247841Sbapt fprintf(stderr, "local size / mtime: %jd / %ld\n", 504247841Sbapt (intmax_t)sb.st_size, (long)sb.st_mtime); 505247841Sbapt if (us.size != -1) 506247841Sbapt fprintf(stderr, "remote size / mtime: %jd / %ld\n", 507247841Sbapt (intmax_t)us.size, (long)us.mtime); 508259266Sbdrewery } 509259266Sbdrewery 510259266Sbdrewery /* open output file */ 511259266Sbdrewery if (o_stdout) { 512259266Sbdrewery /* output to stdout */ 513259266Sbdrewery of = stdout; 514259266Sbdrewery } else if (r_flag && sb.st_size != -1) { 515259266Sbdrewery /* resume mode, local file exists */ 516259266Sbdrewery if (!F_flag && us.mtime && sb.st_mtime != us.mtime) { 517259266Sbdrewery /* no match! have to refetch */ 518259266Sbdrewery fclose(f); 519247841Sbapt /* if precious, warn the user and give up */ 520262400Sbapt if (R_flag) { 521247841Sbapt warnx("%s: local modification time " 522247841Sbapt "does not match remote", path); 523262400Sbapt goto failure_keep; 524262400Sbapt } 525259266Sbdrewery } else if (url->offset > sb.st_size) { 526259266Sbdrewery /* gap between what we asked for and what we got */ 527262400Sbapt warnx("%s: gap in resume mode", URL); 528247841Sbapt fclose(of); 529247841Sbapt of = NULL; 530247841Sbapt /* picked up again later */ 531259266Sbdrewery } else if (us.size != -1) { 532259266Sbdrewery if (us.size == sb.st_size) 533259266Sbdrewery /* nothing to do */ 534262400Sbapt goto success; 535262400Sbapt if (sb.st_size > us.size) { 536262400Sbapt /* local file too long! */ 537247841Sbapt warnx("%s: local file (%jd bytes) is longer " 538247841Sbapt "than remote file (%jd bytes)", path, 539247841Sbapt (intmax_t)sb.st_size, (intmax_t)us.size); 540257145Sbdrewery goto failure; 541262400Sbapt } 542262400Sbapt /* we got it, open local file */ 543257145Sbdrewery if ((of = fopen(path, "a")) == NULL) { 544257145Sbdrewery warn("%s: fopen()", path); 545262400Sbapt goto failure; 546257145Sbdrewery } 547262400Sbapt /* check that it didn't move under our feet */ 548257145Sbdrewery if (fstat(fileno(of), &nsb) == -1) { 549262400Sbapt /* can't happen! */ 550257147Sbdrewery warn("%s: fstat()", path); 551262400Sbapt goto failure; 552257147Sbdrewery } 553262400Sbapt if (nsb.st_dev != sb.st_dev || 554262400Sbapt nsb.st_ino != nsb.st_ino || 555262400Sbapt nsb.st_size != sb.st_size) { 556259266Sbdrewery warnx("%s: file has changed", URL); 557262400Sbapt fclose(of); 558257145Sbdrewery of = NULL; 559257145Sbdrewery sb = nsb; 560257145Sbdrewery /* picked up again later */ 561257145Sbdrewery } 562247841Sbapt /* seek to where we left off */ 563247841Sbapt if (of != NULL && fseek(of, url->offset, SEEK_SET) != 0) { 564247841Sbapt warn("%s: fseek()", path); 565247841Sbapt fclose(of); 566247841Sbapt of = NULL; 567257145Sbdrewery /* picked up again later */ 568262400Sbapt } 569247841Sbapt } 570247841Sbapt } else if (m_flag && sb.st_size != -1) { 571247841Sbapt /* mirror mode, local file exists */ 572262400Sbapt if (sb.st_size == us.size && sb.st_mtime == us.mtime) 573247841Sbapt goto success; 574247841Sbapt } 575259266Sbdrewery 576259266Sbdrewery if (of == NULL) { 577259266Sbdrewery /* 578262400Sbapt * We don't yet have an output file; either this is a 579262400Sbapt * vanilla run with no special flags, or the local and 580259266Sbdrewery * remote files didn't match. 581259266Sbdrewery */ 582259266Sbdrewery 583259266Sbdrewery if (url->offset > 0) { 584259266Sbdrewery /* 585259266Sbdrewery * We tried to restart a transfer, but for 586259266Sbdrewery * some reason gave up - so we have to restart 587262400Sbapt * from scratch if we want the whole file 588262400Sbapt */ 589259266Sbdrewery url->offset = 0; 590259266Sbdrewery if ((f = fetchXGet(url, &us, flags)) == NULL) { 591259266Sbdrewery warnx("%s: %s", URL, fetchLastErrString); 592262400Sbapt goto failure; 593259266Sbdrewery } 594259266Sbdrewery if (sigint) 595259266Sbdrewery goto signal; 596259266Sbdrewery } 597263181Sbdrewery 598263181Sbdrewery /* construct a temp file name */ 599263181Sbdrewery if (sb.st_size != -1 && S_ISREG(sb.st_mode)) { 600263181Sbdrewery if ((slash = strrchr(path, '/')) == NULL) 601259266Sbdrewery slash = path; 602259266Sbdrewery else 603262400Sbapt ++slash; 604259266Sbdrewery asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s", 605259266Sbdrewery (int)(slash - path), path, slash); 606247841Sbapt if (tmppath != NULL) { 607247841Sbapt mkstemps(tmppath, strlen(slash) + 1); 608259266Sbdrewery of = fopen(tmppath, "w"); 609259266Sbdrewery chown(tmppath, sb.st_uid, sb.st_gid); 610259266Sbdrewery chmod(tmppath, sb.st_mode & ALLPERMS); 611259266Sbdrewery } 612263180Sbdrewery } 613263180Sbdrewery if (of == NULL) 614263180Sbdrewery of = fopen(path, "w"); 615259266Sbdrewery if (of == NULL) { 616259266Sbdrewery warn("%s: open()", path); 617259266Sbdrewery goto failure; 618259266Sbdrewery } 619259266Sbdrewery } 620259266Sbdrewery count = url->offset; 621259266Sbdrewery 622259266Sbdrewery /* start the counter */ 623259266Sbdrewery stat_start(&xs, path, us.size, count); 624259266Sbdrewery 625259266Sbdrewery sigalrm = siginfo = sigint = 0; 626259266Sbdrewery 627247841Sbapt /* suck in the data */ 628247841Sbapt signal(SIGINFO, sig_handler); 629247841Sbapt while (!sigint) { 630257145Sbdrewery if (us.size != -1 && us.size - count < B_size && 631257145Sbdrewery us.size - count >= 0) 632257145Sbdrewery size = us.size - count; 633257145Sbdrewery else 634257145Sbdrewery size = B_size; 635257145Sbdrewery if (siginfo) { 636257145Sbdrewery stat_end(&xs); 637257145Sbdrewery siginfo = 0; 638262400Sbapt } 639247841Sbapt if ((size = fread(buf, 1, size, f)) == 0) { 640262400Sbapt if (ferror(f) && errno == EINTR && !sigint) 641262400Sbapt clearerr(f); 642262400Sbapt else 643257145Sbdrewery break; 644262400Sbapt } 645262400Sbapt stat_update(&xs, count += size); 646257145Sbdrewery for (ptr = buf; size > 0; ptr += wr, size -= wr) 647262400Sbapt if ((wr = fwrite(ptr, 1, size, of)) < size) { 648257145Sbdrewery if (ferror(of) && errno == EINTR && !sigint) 649257145Sbdrewery clearerr(of); 650262400Sbapt else 651257145Sbdrewery break; 652257145Sbdrewery } 653262400Sbapt if (size != 0) 654257145Sbdrewery break; 655257145Sbdrewery } 656257145Sbdrewery if (!sigalrm) 657257145Sbdrewery sigalrm = ferror(f) && errno == ETIMEDOUT; 658257145Sbdrewery signal(SIGINFO, SIG_DFL); 659257145Sbdrewery 660257145Sbdrewery stat_end(&xs); 661262400Sbapt 662262400Sbapt /* 663247841Sbapt * If the transfer timed out or was interrupted, we still want to 664262400Sbapt * set the mtime in case the file is not removed (-r or -R) and 665262400Sbapt * the user later restarts the transfer. 666262400Sbapt */ 667247841Sbapt signal: 668262400Sbapt /* set mtime of local file */ 669262400Sbapt if (!n_flag && us.mtime && !o_stdout && of != NULL && 670262400Sbapt (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 671247841Sbapt struct timeval tv[2]; 672257145Sbdrewery 673247841Sbapt fflush(of); 674247841Sbapt tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 675262400Sbapt tv[1].tv_sec = (long)us.mtime; 676262400Sbapt tv[0].tv_usec = tv[1].tv_usec = 0; 677257142Sbdrewery if (utimes(tmppath ? tmppath : path, tv)) 678257145Sbdrewery warn("%s: utimes()", tmppath ? tmppath : path); 679257145Sbdrewery } 680257145Sbdrewery 681262400Sbapt /* timed out or interrupted? */ 682257145Sbdrewery if (sigalrm) 683262400Sbapt warnx("transfer timed out"); 684247841Sbapt if (sigint) { 685247841Sbapt warnx("transfer interrupted"); 686262400Sbapt goto failure; 687262400Sbapt } 688247841Sbapt 689257145Sbdrewery /* timeout / interrupt before connection completley established? */ 690257145Sbdrewery if (f == NULL) 691257145Sbdrewery goto failure; 692259266Sbdrewery 693259266Sbdrewery if (!sigalrm) { 694259266Sbdrewery /* check the status of our files */ 695259266Sbdrewery if (ferror(f)) 696259266Sbdrewery warn("%s", URL); 697259266Sbdrewery if (ferror(of)) 698259266Sbdrewery warn("%s", path); 699259266Sbdrewery if (ferror(f) || ferror(of)) 700259266Sbdrewery goto failure; 701259266Sbdrewery } 702259266Sbdrewery 703259266Sbdrewery /* did the transfer complete normally? */ 704259266Sbdrewery if (us.size != -1 && count < us.size) { 705259266Sbdrewery warnx("%s appears to be truncated: %jd/%jd bytes", 706259266Sbdrewery path, (intmax_t)count, (intmax_t)us.size); 707259266Sbdrewery goto failure_keep; 708259266Sbdrewery } 709259266Sbdrewery 710259266Sbdrewery /* 711259266Sbdrewery * If the transfer timed out and we didn't know how much to 712259266Sbdrewery * expect, assume the worst (i.e. we didn't get all of it) 713259266Sbdrewery */ 714259266Sbdrewery if (sigalrm && us.size == -1) { 715259266Sbdrewery warnx("%s may be truncated", path); 716259266Sbdrewery goto failure_keep; 717259266Sbdrewery } 718259266Sbdrewery 719259266Sbdrewery success: 720259266Sbdrewery r = 0; 721259266Sbdrewery if (tmppath != NULL && rename(tmppath, path) == -1) { 722259266Sbdrewery warn("%s: rename()", path); 723259266Sbdrewery goto failure_keep; 724259266Sbdrewery } 725259266Sbdrewery goto done; 726259266Sbdrewery failure: 727259266Sbdrewery if (of && of != stdout && !R_flag && !r_flag) 728259266Sbdrewery if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) 729259266Sbdrewery unlink(tmppath ? tmppath : path); 730259266Sbdrewery if (R_flag && tmppath != NULL && sb.st_size == -1) 731257145Sbdrewery rename(tmppath, path); /* ignore errors here */ 732257145Sbdrewery failure_keep: 733257145Sbdrewery r = -1; 734259266Sbdrewery goto done; 735257145Sbdrewery done: 736257145Sbdrewery if (f) 737259266Sbdrewery fclose(f); 738257145Sbdrewery if (of && of != stdout) 739259266Sbdrewery fclose(of); 740257145Sbdrewery if (url) 741257145Sbdrewery fetchFreeURL(url); 742257145Sbdrewery if (tmppath != NULL) 743257145Sbdrewery free(tmppath); 744257145Sbdrewery return (r); 745257145Sbdrewery} 746259266Sbdrewery 747259266Sbdrewerystatic void 748259266Sbdreweryusage(void) 749259266Sbdrewery{ 750259266Sbdrewery fprintf(stderr, "%s\n%s\n%s\n%s\n", 751259266Sbdrewery"usage: fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [-N file] [-o file] [-S bytes]", 752259266Sbdrewery" [-T seconds] [-w seconds] [-i file] URL ...", 753259266Sbdrewery" fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [-N file] [-o file] [-S bytes]", 754259266Sbdrewery" [-T seconds] [-w seconds] [-i file] -h host -f file [-c dir]"); 755259266Sbdrewery} 756259266Sbdrewery 757259266Sbdrewery 758259266Sbdrewery/* 759259266Sbdrewery * Entry point 760259266Sbdrewery */ 761259266Sbdreweryint 762259266Sbdrewerymain(int argc, char *argv[]) 763259266Sbdrewery{ 764259266Sbdrewery struct stat sb; 765259266Sbdrewery struct sigaction sa; 766257145Sbdrewery const char *p, *s; 767257145Sbdrewery char *end, *q; 768257145Sbdrewery int c, e, r; 769259266Sbdrewery 770257145Sbdrewery while ((c = getopt(argc, argv, 771257145Sbdrewery "146AaB:bc:dFf:Hh:i:lMmN:nPpo:qRrS:sT:tUvw:")) != -1) 772257145Sbdrewery switch (c) { 773257145Sbdrewery case '1': 774257145Sbdrewery once_flag = 1; 775257145Sbdrewery break; 776257145Sbdrewery case '4': 777257145Sbdrewery family = PF_INET; 778259266Sbdrewery break; 779259266Sbdrewery case '6': 780259266Sbdrewery family = PF_INET6; 781259266Sbdrewery break; 782259266Sbdrewery case 'A': 783259266Sbdrewery A_flag = 1; 784259266Sbdrewery break; 785259266Sbdrewery case 'a': 786259266Sbdrewery a_flag = 1; 787259266Sbdrewery break; 788259266Sbdrewery case 'B': 789259266Sbdrewery B_size = (off_t)strtol(optarg, &end, 10); 790257145Sbdrewery if (*optarg == '\0' || *end != '\0') 791259266Sbdrewery errx(1, "invalid buffer size (%s)", optarg); 792259266Sbdrewery break; 793259266Sbdrewery case 'b': 794259266Sbdrewery warnx("warning: the -b option is deprecated"); 795247841Sbapt b_flag = 1; 796247841Sbapt break; 797247841Sbapt case 'c': 798257142Sbdrewery c_dirname = optarg; 799257142Sbdrewery break; 800247841Sbapt case 'd': 801247841Sbapt d_flag = 1; 802247841Sbapt break; 803247843Sbapt case 'F': 804247841Sbapt F_flag = 1; 805247841Sbapt break; 806247841Sbapt case 'f': 807247841Sbapt f_filename = optarg; 808247841Sbapt break; 809247841Sbapt case 'H': 810247841Sbapt warnx("the -H option is now implicit, " 811247841Sbapt "use -U to disable"); 812247841Sbapt break; 813247841Sbapt case 'h': 814247841Sbapt h_hostname = optarg; 815247841Sbapt break; 816247841Sbapt case 'i': 817247841Sbapt i_flag = 1; 818247841Sbapt i_filename = optarg; 819247841Sbapt break; 820247841Sbapt case 'l': 821247841Sbapt l_flag = 1; 822247841Sbapt break; 823247841Sbapt case 'o': 824247841Sbapt o_flag = 1; 825247841Sbapt o_filename = optarg; 826247841Sbapt break; 827247841Sbapt case 'M': 828247841Sbapt case 'm': 829247841Sbapt if (r_flag) 830247841Sbapt errx(1, "the -m and -r flags " 831247841Sbapt "are mutually exclusive"); 832247841Sbapt m_flag = 1; 833247841Sbapt break; 834247841Sbapt case 'N': 835247841Sbapt N_filename = optarg; 836247841Sbapt break; 837259266Sbdrewery case 'n': 838247841Sbapt n_flag = 1; 839247841Sbapt break; 840247841Sbapt case 'P': 841247841Sbapt case 'p': 842247841Sbapt p_flag = 1; 843247841Sbapt break; 844247841Sbapt case 'q': 845247841Sbapt v_level = 0; 846247841Sbapt break; 847247841Sbapt case 'R': 848247841Sbapt R_flag = 1; 849247841Sbapt break; 850 case 'r': 851 if (m_flag) 852 errx(1, "the -m and -r flags " 853 "are mutually exclusive"); 854 r_flag = 1; 855 break; 856 case 'S': 857 S_size = (off_t)strtol(optarg, &end, 10); 858 if (*optarg == '\0' || *end != '\0') 859 errx(1, "invalid size (%s)", optarg); 860 break; 861 case 's': 862 s_flag = 1; 863 break; 864 case 'T': 865 T_secs = strtol(optarg, &end, 10); 866 if (*optarg == '\0' || *end != '\0') 867 errx(1, "invalid timeout (%s)", optarg); 868 break; 869 case 't': 870 t_flag = 1; 871 warnx("warning: the -t option is deprecated"); 872 break; 873 case 'U': 874 U_flag = 1; 875 break; 876 case 'v': 877 v_level++; 878 break; 879 case 'w': 880 a_flag = 1; 881 w_secs = strtol(optarg, &end, 10); 882 if (*optarg == '\0' || *end != '\0') 883 errx(1, "invalid delay (%s)", optarg); 884 break; 885 default: 886 usage(); 887 exit(1); 888 } 889 890 argc -= optind; 891 argv += optind; 892 893 if (h_hostname || f_filename || c_dirname) { 894 if (!h_hostname || !f_filename || argc) { 895 usage(); 896 exit(1); 897 } 898 /* XXX this is a hack. */ 899 if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) 900 errx(1, "invalid hostname"); 901 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, 902 c_dirname ? c_dirname : "", f_filename) == -1) 903 errx(1, "%s", strerror(ENOMEM)); 904 argc++; 905 } 906 907 if (!argc) { 908 usage(); 909 exit(1); 910 } 911 912 /* allocate buffer */ 913 if (B_size < MINBUFSIZE) 914 B_size = MINBUFSIZE; 915 if ((buf = malloc(B_size)) == NULL) 916 errx(1, "%s", strerror(ENOMEM)); 917 918 /* timeouts */ 919 if ((s = getenv("FTP_TIMEOUT")) != NULL) { 920 ftp_timeout = strtol(s, &end, 10); 921 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) { 922 warnx("FTP_TIMEOUT (%s) is not a positive integer", s); 923 ftp_timeout = 0; 924 } 925 } 926 if ((s = getenv("HTTP_TIMEOUT")) != NULL) { 927 http_timeout = strtol(s, &end, 10); 928 if (*s == '\0' || *end != '\0' || http_timeout < 0) { 929 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s); 930 http_timeout = 0; 931 } 932 } 933 934 /* signal handling */ 935 sa.sa_flags = 0; 936 sa.sa_handler = sig_handler; 937 sigemptyset(&sa.sa_mask); 938 sigaction(SIGALRM, &sa, NULL); 939 sa.sa_flags = SA_RESETHAND; 940 sigaction(SIGINT, &sa, NULL); 941 fetchRestartCalls = 0; 942 943 /* output file */ 944 if (o_flag) { 945 if (strcmp(o_filename, "-") == 0) { 946 o_stdout = 1; 947 } else if (stat(o_filename, &sb) == -1) { 948 if (errno == ENOENT) { 949 if (argc > 1) 950 errx(1, "%s is not a directory", 951 o_filename); 952 } else { 953 err(1, "%s", o_filename); 954 } 955 } else { 956 if (sb.st_mode & S_IFDIR) 957 o_directory = 1; 958 } 959 } 960 961 /* check if output is to a tty (for progress report) */ 962 v_tty = isatty(STDERR_FILENO); 963 if (v_tty) 964 pgrp = getpgrp(); 965 966 r = 0; 967 968 /* authentication */ 969 if (v_tty) 970 fetchAuthMethod = query_auth; 971 if (N_filename != NULL) 972 setenv("NETRC", N_filename, 1); 973 974 while (argc) { 975 if ((p = strrchr(*argv, '/')) == NULL) 976 p = *argv; 977 else 978 p++; 979 980 if (!*p) 981 p = "fetch.out"; 982 983 fetchLastErrCode = 0; 984 985 if (o_flag) { 986 if (o_stdout) { 987 e = fetch(*argv, "-"); 988 } else if (o_directory) { 989 asprintf(&q, "%s/%s", o_filename, p); 990 e = fetch(*argv, q); 991 free(q); 992 } else { 993 e = fetch(*argv, o_filename); 994 } 995 } else { 996 e = fetch(*argv, p); 997 } 998 999 if (sigint) 1000 kill(getpid(), SIGINT); 1001 1002 if (e == 0 && once_flag) 1003 exit(0); 1004 1005 if (e) { 1006 r = 1; 1007 if ((fetchLastErrCode 1008 && fetchLastErrCode != FETCH_UNAVAIL 1009 && fetchLastErrCode != FETCH_MOVED 1010 && fetchLastErrCode != FETCH_URL 1011 && fetchLastErrCode != FETCH_RESOLV 1012 && fetchLastErrCode != FETCH_UNKNOWN)) { 1013 if (w_secs && v_level) 1014 fprintf(stderr, "Waiting %ld seconds " 1015 "before retrying\n", w_secs); 1016 if (w_secs) 1017 sleep(w_secs); 1018 if (a_flag) 1019 continue; 1020 } 1021 } 1022 1023 argc--, argv++; 1024 } 1025 1026 exit(r); 1027} 1028