fetch.c revision 187361
111499Sjkh/*- 211499Sjkh * Copyright (c) 2000-2004 Dag-Erling Co��dan Sm��rgrav 311499Sjkh * All rights reserved. 411499Sjkh * 511499Sjkh * Redistribution and use in source and binary forms, with or without 611499Sjkh * modification, are permitted provided that the following conditions 742520Sasami * are met: 811499Sjkh * 1. Redistributions of source code must retain the above copyright 911499Sjkh * notice, this list of conditions and the following disclaimer 1011499Sjkh * in this position and unchanged. 1111499Sjkh * 2. Redistributions in binary form must reproduce the above copyright 1211499Sjkh * notice, this list of conditions and the following disclaimer in the 1311499Sjkh * documentation and/or other materials provided with the distribution. 1411499Sjkh * 3. The name of the author may not be used to endorse or promote products 1511499Sjkh * derived from this software without specific prior written permission 1611499Sjkh * 1711499Sjkh * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1811499Sjkh * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1911499Sjkh * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2011499Sjkh * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2111499Sjkh * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2211499Sjkh * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2311499Sjkh * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2411499Sjkh * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2511499Sjkh * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2611499Sjkh * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2711499Sjkh */ 2811499Sjkh 2911499Sjkh#include <sys/cdefs.h> 3011499Sjkh__FBSDID("$FreeBSD: head/usr.bin/fetch/fetch.c 187361 2009-01-17 13:34:56Z des $"); 3111499Sjkh 3211499Sjkh#include <sys/param.h> 3311499Sjkh#include <sys/socket.h> 3411499Sjkh#include <sys/stat.h> 3511499Sjkh#include <sys/time.h> 3611499Sjkh 3711532Sjkh#include <ctype.h> 3811303Sjkh#include <err.h> 3911303Sjkh#include <errno.h> 4011303Sjkh#include <signal.h> 4111303Sjkh#include <stdint.h> 4211303Sjkh#include <stdio.h> 4311303Sjkh#include <stdlib.h> 4411303Sjkh#include <string.h> 4511303Sjkh#include <termios.h> 4616366Sjkh#include <unistd.h> 4717377Sjkh 4811303Sjkh#include <fetch.h> 4914738Sjkh 5014670Sjkh#define MINBUFSIZE 4096 5111303Sjkh#define TIMEOUT 120 5211303Sjkh 5311303Sjkh/* Option flags */ 5411303Sjkhint A_flag; /* -A: do not follow 302 redirects */ 5511593Sjkhint a_flag; /* -a: auto retry */ 5611303Sjkhoff_t B_size; /* -B: buffer size */ 5711303Sjkhint b_flag; /*! -b: workaround TCP bug */ 5811303Sjkhchar *c_dirname; /* -c: remote directory */ 5924235Sjkhint d_flag; /* -d: direct connection */ 6024235Sjkhint F_flag; /* -F: restart without checking mtime */ 6124235Sjkhchar *f_filename; /* -f: file to fetch */ 6224235Sjkhchar *h_hostname; /* -h: host to fetch from */ 6324235Sjkhint i_flag; /* -i: specify input file for mtime comparison */ 6411479Sjkhchar *i_filename; /* name of input file */ 6512245Sjkhint l_flag; /* -l: link rather than copy file: URLs */ 6612245Sjkhint m_flag; /* -[Mm]: mirror mode */ 6711303Sjkhchar *N_filename; /* -N: netrc file name */ 6842520Sasamiint n_flag; /* -n: do not preserve modification time */ 6911303Sjkhint o_flag; /* -o: specify output file */ 7021132Sobrienint o_directory; /* output file is a directory */ 7111303Sjkhchar *o_filename; /* name of output file */ 7211303Sjkhint o_stdout; /* output file is stdout */ 7341752Ssteveint once_flag; /* -1: stop at first successful file */ 7411303Sjkhint p_flag; /* -[Pp]: use passive FTP */ 7511303Sjkhint R_flag; /* -R: don't delete partially transferred files */ 7621132Sobrienint r_flag; /* -r: restart previously interrupted transfer */ 7711303Sjkhoff_t S_size; /* -S: require size to match */ 7841752Ssteveint s_flag; /* -s: show size, don't fetch */ 7911303Sjkhlong T_secs; /* -T: transfer timeout in seconds */ 8011303Sjkhint t_flag; /*! -t: workaround TCP bug */ 8140281Sjkhint U_flag; /* -U: do not use high ports */ 8211303Sjkhint v_level = 1; /* -v: verbosity level */ 8311303Sjkhint v_tty; /* stdout is a tty */ 8442005Sjkhpid_t pgrp; /* our process group */ 8542520Sasamilong w_secs; /* -w: retry delay */ 8611303Sjkhint family = PF_UNSPEC; /* -[46]: address family to use */ 8711303Sjkh 8834792Sjkhint sigalrm; /* SIGALRM received */ 8911303Sjkhint siginfo; /* SIGINFO received */ 9011303Sjkhint sigint; /* SIGINT received */ 9134867Sjkh 9224235Sjkhlong ftp_timeout = TIMEOUT; /* default timeout for FTP transfers */ 9311303Sjkhlong http_timeout = TIMEOUT; /* default timeout for HTTP transfers */ 9411303Sjkhchar *buf; /* transfer buffer */ 9511303Sjkh 9611303Sjkh 9711303Sjkh/* 9841752Ssteve * Signal handler 9914670Sjkh */ 10011303Sjkhstatic void 10111303Sjkhsig_handler(int sig) 10211303Sjkh{ 10339595Sjkh switch (sig) { 10411303Sjkh case SIGALRM: 10542520Sasami sigalrm = 1; 10641752Ssteve break; 10741752Ssteve case SIGINFO: 10811303Sjkh siginfo = 1; 10911303Sjkh break; 11011303Sjkh case SIGINT: 11141752Ssteve sigint = 1; 11211303Sjkh break; 11311303Sjkh } 11411303Sjkh} 11511303Sjkh 11625481Sjkhstruct xferstat { 11741752Ssteve char name[64]; 11841752Ssteve struct timeval start; 11941752Ssteve struct timeval last; 12041752Ssteve off_t size; 12141752Ssteve off_t offset; 12241752Ssteve off_t rcvd; 12341752Ssteve}; 12441752Ssteve 12541752Ssteve/* 12621132Sobrien * Compute and display ETA 12742520Sasami */ 12825481Sjkhstatic const char * 12911303Sjkhstat_eta(struct xferstat *xs) 13040281Sjkh{ 13140281Sjkh static char str[16]; 13242520Sasami long elapsed, eta; 13340281Sjkh off_t received, expected; 13441752Ssteve 13511303Sjkh elapsed = xs->last.tv_sec - xs->start.tv_sec; 13611303Sjkh received = xs->rcvd - xs->offset; 13711303Sjkh expected = xs->size - xs->rcvd; 13811303Sjkh eta = (long)((double)elapsed * expected / received); 13911303Sjkh if (eta > 3600) 14011303Sjkh snprintf(str, sizeof str, "%02ldh%02ldm", 14111303Sjkh eta / 3600, (eta % 3600) / 60); 14211303Sjkh else 14311303Sjkh snprintf(str, sizeof str, "%02ldm%02lds", 14411303Sjkh eta / 60, eta % 60); 14511303Sjkh return (str); 14611303Sjkh} 14711303Sjkh 14811303Sjkh/* 14911303Sjkh * Format a number as "xxxx YB" where Y is ' ', 'k', 'M'... 15011303Sjkh */ 15111303Sjkhstatic const char *prefixes = " kMGTP"; 15211303Sjkhstatic const char * 15311579Sjkhstat_bytes(off_t bytes) 15411303Sjkh{ 15511303Sjkh static char str[16]; 15611303Sjkh const char *prefix = prefixes; 15711303Sjkh 15811303Sjkh while (bytes > 9999 && prefix[1] != '\0') { 15911303Sjkh bytes /= 1024; 16016688Sjkh prefix++; 16116688Sjkh } 16216688Sjkh snprintf(str, sizeof str, "%4jd %cB", (intmax_t)bytes, *prefix); 16316688Sjkh return (str); 16416688Sjkh} 16516688Sjkh 16616688Sjkh/* 16716688Sjkh * Compute and display transfer rate 16816688Sjkh */ 16916688Sjkhstatic const char * 17016688Sjkhstat_bps(struct xferstat *xs) 17111303Sjkh{ 17214670Sjkh static char str[16]; 17311303Sjkh double delta, bps; 17411579Sjkh 17511303Sjkh delta = (xs->last.tv_sec + (xs->last.tv_usec / 1.e6)) 17611303Sjkh - (xs->start.tv_sec + (xs->start.tv_usec / 1.e6)); 17711303Sjkh if (delta == 0.0) { 17811303Sjkh snprintf(str, sizeof str, "?? Bps"); 17911303Sjkh } else { 18016688Sjkh bps = (xs->rcvd - xs->offset) / delta; 18111303Sjkh snprintf(str, sizeof str, "%sps", stat_bytes((off_t)bps)); 18214670Sjkh } 18311303Sjkh return (str); 18411303Sjkh} 18511303Sjkh 18611303Sjkh/* 18711303Sjkh * Update the stats display 18811303Sjkh */ 18911303Sjkhstatic void 19011303Sjkhstat_display(struct xferstat *xs, int force) 19111593Sjkh{ 19211303Sjkh struct timeval now; 19311303Sjkh int ctty_pgrp; 19411303Sjkh 19511303Sjkh /* check if we're the foreground process */ 19611303Sjkh if (ioctl(STDERR_FILENO, TIOCGPGRP, &ctty_pgrp) == -1 || 19711303Sjkh (pid_t)ctty_pgrp != pgrp) 19811303Sjkh return; 19911303Sjkh 20011303Sjkh gettimeofday(&now, NULL); 20111303Sjkh if (!force && now.tv_sec <= xs->last.tv_sec) 20211303Sjkh return; 20311303Sjkh xs->last = now; 20411303Sjkh 20511528Sjkh fprintf(stderr, "\r%-46.46s", xs->name); 20611303Sjkh if (xs->size <= 0) { 20711303Sjkh setproctitle("%s [%s]", xs->name, stat_bytes(xs->rcvd)); 20811303Sjkh fprintf(stderr, " %s", stat_bytes(xs->rcvd)); 20911303Sjkh } else { 21011303Sjkh setproctitle("%s [%d%% of %s]", xs->name, 21111303Sjkh (int)((100.0 * xs->rcvd) / xs->size), 21211303Sjkh stat_bytes(xs->size)); 21311303Sjkh fprintf(stderr, "%3d%% of %s", 21411303Sjkh (int)((100.0 * xs->rcvd) / xs->size), 21511303Sjkh stat_bytes(xs->size)); 21611303Sjkh } 21711303Sjkh fprintf(stderr, " %s", stat_bps(xs)); 21811303Sjkh if (xs->size > 0 && xs->rcvd > 0 && 21911303Sjkh xs->last.tv_sec >= xs->start.tv_sec + 10) 22011303Sjkh fprintf(stderr, " %s", stat_eta(xs)); 22111303Sjkh} 22211303Sjkh 22311303Sjkh/* 22411303Sjkh * Initialize the transfer statistics 22511303Sjkh */ 22611532Sjkhstatic void 22720315Sjkhstat_start(struct xferstat *xs, const char *name, off_t size, off_t offset) 22811532Sjkh{ 22911532Sjkh snprintf(xs->name, sizeof xs->name, "%s", name); 23011532Sjkh gettimeofday(&xs->start, NULL); 23111532Sjkh xs->last.tv_sec = xs->last.tv_usec = 0; 23220315Sjkh xs->size = size; 23311532Sjkh xs->offset = offset; 23411532Sjkh xs->rcvd = offset; 23511532Sjkh if (v_tty && v_level > 0) 23611532Sjkh stat_display(xs, 1); 23711532Sjkh else if (v_level > 0) 23811532Sjkh fprintf(stderr, "%-46s", xs->name); 23911303Sjkh} 24024364Sjkh 24111303Sjkh/* 24211303Sjkh * Update the transfer statistics 24324364Sjkh */ 24411303Sjkhstatic void 24511532Sjkhstat_update(struct xferstat *xs, off_t rcvd) 24611303Sjkh{ 24720315Sjkh xs->rcvd = rcvd; 24811532Sjkh if (v_tty && v_level > 0) 24911532Sjkh stat_display(xs, 0); 25011303Sjkh} 25111303Sjkh 25211303Sjkh/* 25311303Sjkh * Finalize the transfer statistics 25411303Sjkh */ 25511303Sjkhstatic void 25611303Sjkhstat_end(struct xferstat *xs) 25711303Sjkh{ 25824364Sjkh gettimeofday(&xs->last, NULL); 25924645Sjkh if (v_tty && v_level > 0) { 26024645Sjkh stat_display(xs, 1); 26124645Sjkh putc('\n', stderr); 26224645Sjkh } else if (v_level > 0) { 26311303Sjkh fprintf(stderr, " %s %s\n", 26411303Sjkh stat_bytes(xs->size), stat_bps(xs)); 26511303Sjkh } 26611303Sjkh} 26720315Sjkh 26811303Sjkh/* 26914670Sjkh * Ask the user for authentication details 27011303Sjkh */ 27120315Sjkhstatic int 27211303Sjkhquery_auth(struct url *URL) 27311303Sjkh{ 27411303Sjkh struct termios tios; 27514670Sjkh tcflag_t saved_flags; 27611303Sjkh int i, nopwd; 27711593Sjkh 27811303Sjkh fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n", 27911303Sjkh URL->scheme, URL->host, URL->port); 28011303Sjkh 28111303Sjkh fprintf(stderr, "Login: "); 28211303Sjkh if (fgets(URL->user, sizeof URL->user, stdin) == NULL) 28311303Sjkh return (-1); 28411303Sjkh for (i = strlen(URL->user); i >= 0; --i) 28511303Sjkh if (URL->user[i] == '\r' || URL->user[i] == '\n') 28611303Sjkh URL->user[i] = '\0'; 28711303Sjkh 28811303Sjkh fprintf(stderr, "Password: "); 28911303Sjkh if (tcgetattr(STDIN_FILENO, &tios) == 0) { 29011303Sjkh saved_flags = tios.c_lflag; 29111303Sjkh tios.c_lflag &= ~ECHO; 29214738Sjkh tios.c_lflag |= ECHONL|ICANON; 29314738Sjkh tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios); 29414738Sjkh nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 29514738Sjkh tios.c_lflag = saved_flags; 29614738Sjkh tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios); 29714738Sjkh } else { 29811303Sjkh nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL); 29914738Sjkh } 30014738Sjkh if (nopwd) 30114738Sjkh return (-1); 30214738Sjkh for (i = strlen(URL->pwd); i >= 0; --i) 30314738Sjkh if (URL->pwd[i] == '\r' || URL->pwd[i] == '\n') 30414738Sjkh URL->pwd[i] = '\0'; 30511303Sjkh 30611303Sjkh return (0); 30714738Sjkh} 30811303Sjkh 30911303Sjkh/* 31011303Sjkh * Fetch a file 31111303Sjkh */ 31211303Sjkhstatic int 31311303Sjkhfetch(char *URL, const char *path) 31411303Sjkh{ 31511303Sjkh struct url *url; 31611303Sjkh struct url_stat us; 31711303Sjkh struct stat sb, nsb; 31811303Sjkh struct xferstat xs; 31911303Sjkh FILE *f, *of; 32011303Sjkh size_t size, wr; 32111303Sjkh off_t count; 32211303Sjkh char flags[8]; 32311303Sjkh const char *slash; 32411303Sjkh char *tmppath; 32511303Sjkh int r; 32611303Sjkh unsigned timeout; 32711303Sjkh char *ptr; 32811303Sjkh 32911303Sjkh f = of = NULL; 33011303Sjkh tmppath = NULL; 33111303Sjkh 33211303Sjkh timeout = 0; 33311303Sjkh *flags = 0; 33411303Sjkh count = 0; 33511303Sjkh 33611303Sjkh /* set verbosity level */ 33711303Sjkh if (v_level > 1) 33811303Sjkh strcat(flags, "v"); 33911303Sjkh if (v_level > 2) 34011303Sjkh fetchDebug = 1; 34111303Sjkh 34211303Sjkh /* parse URL */ 34311303Sjkh if ((url = fetchParseURL(URL)) == NULL) { 34411593Sjkh warnx("%s: parse error", URL); 34511593Sjkh goto failure; 34611303Sjkh } 34711303Sjkh 34811303Sjkh /* if no scheme was specified, take a guess */ 34911303Sjkh if (!*url->scheme) { 35011303Sjkh if (!*url->host) 35111303Sjkh strcpy(url->scheme, SCHEME_FILE); 35211593Sjkh else if (strncasecmp(url->host, "ftp.", 4) == 0) 35311593Sjkh strcpy(url->scheme, SCHEME_FTP); 35411303Sjkh else if (strncasecmp(url->host, "www.", 4) == 0) 35511303Sjkh strcpy(url->scheme, SCHEME_HTTP); 35611303Sjkh } 35711303Sjkh 35811303Sjkh /* common flags */ 35915788Sjkh switch (family) { 36011303Sjkh case PF_INET: 36111303Sjkh strcat(flags, "4"); 36211303Sjkh break; 36315788Sjkh case PF_INET6: 36415788Sjkh strcat(flags, "6"); 36515788Sjkh break; 36611303Sjkh } 36715788Sjkh 36815788Sjkh /* FTP specific flags */ 36911303Sjkh if (strcmp(url->scheme, SCHEME_FTP) == 0) { 37011303Sjkh if (p_flag) 37111303Sjkh strcat(flags, "p"); 37211303Sjkh if (d_flag) 37315242Sjkh strcat(flags, "d"); 37415242Sjkh if (U_flag) 37515242Sjkh strcat(flags, "l"); 37615242Sjkh timeout = T_secs ? T_secs : ftp_timeout; 37711303Sjkh } 37811303Sjkh 37911303Sjkh /* HTTP specific flags */ 38011303Sjkh if (strcmp(url->scheme, SCHEME_HTTP) == 0 || 38111303Sjkh strcmp(url->scheme, SCHEME_HTTPS) == 0) { 38211303Sjkh if (d_flag) 38311303Sjkh strcat(flags, "d"); 38411303Sjkh if (A_flag) 38511303Sjkh strcat(flags, "A"); 38611303Sjkh timeout = T_secs ? T_secs : http_timeout; 38711303Sjkh if (i_flag) { 38815468Sjkh if (stat(i_filename, &sb)) { 38911303Sjkh warn("%s: stat()", i_filename); 39011303Sjkh goto failure; 39111303Sjkh } 39215468Sjkh url->ims_time = sb.st_mtime; 39311303Sjkh strcat(flags, "i"); 39411303Sjkh } 39511303Sjkh } 39611303Sjkh 39711303Sjkh /* set the protocol timeout. */ 39811303Sjkh fetchTimeout = timeout; 39911303Sjkh 40011303Sjkh /* just print size */ 40111303Sjkh if (s_flag) { 40211303Sjkh if (timeout) 40311303Sjkh alarm(timeout); 40411303Sjkh r = fetchStat(url, &us, flags); 40511303Sjkh if (timeout) 40611303Sjkh alarm(0); 40715242Sjkh if (sigalrm || sigint) 40815242Sjkh goto signal; 40911479Sjkh if (r == -1) { 41015242Sjkh warnx("%s", fetchLastErrString); 41116204Sjkh goto failure; 41211520Sjkh } 41316204Sjkh if (us.size == -1) 41416203Sjkh printf("Unknown\n"); 41516688Sjkh else 41615242Sjkh printf("%jd\n", (intmax_t)us.size); 41715242Sjkh goto success; 41815242Sjkh } 41911479Sjkh 42015242Sjkh /* 42115242Sjkh * If the -r flag was specified, we have to compare the local 42215242Sjkh * and remote files, so we should really do a fetchStat() 42315477Sjkh * first, but I know of at least one HTTP server that only 42415242Sjkh * sends the content size in response to GET requests, and 42515242Sjkh * leaves it out of replies to HEAD requests. Also, in the 42615242Sjkh * (frequent) case that the local and remote files match but 42715477Sjkh * the local file is truncated, we have sufficient information 42815477Sjkh * before the compare to issue a correct request. Therefore, 42915242Sjkh * we always issue a GET request as if we were sure the local 43015242Sjkh * file was a truncated copy of the remote file; we can drop 43115242Sjkh * the connection later if we change our minds. 43216688Sjkh */ 43316204Sjkh sb.st_size = -1; 43415242Sjkh if (!o_stdout) { 43516204Sjkh r = stat(path, &sb); 43616204Sjkh if (r == 0 && r_flag && S_ISREG(sb.st_mode)) { 43716204Sjkh url->offset = sb.st_size; 43816204Sjkh } else if (r == -1 || !S_ISREG(sb.st_mode)) { 43916204Sjkh /* 44022105Sjkh * Whatever value sb.st_size has now is either 44122105Sjkh * wrong (if stat(2) failed) or irrelevant (if the 44222105Sjkh * path does not refer to a regular file) 44322105Sjkh */ 44422105Sjkh sb.st_size = -1; 44522105Sjkh } 44622105Sjkh if (r == -1 && errno != ENOENT) { 44722105Sjkh warnx("%s: stat()", path); 44811520Sjkh goto failure; 44922102Sjkh } 45015468Sjkh } 45115242Sjkh 45211520Sjkh /* start the transfer */ 45315477Sjkh if (timeout) 45411479Sjkh alarm(timeout); 45515242Sjkh f = fetchXGet(url, &us, flags); 45615242Sjkh if (timeout) 45715242Sjkh alarm(0); 45815242Sjkh if (sigalrm || sigint) 45915242Sjkh goto signal; 46015477Sjkh if (f == NULL) { 46115242Sjkh warnx("%s: %s", URL, fetchLastErrString); 46215477Sjkh if (i_flag && strcmp(url->scheme, SCHEME_HTTP) == 0 46311479Sjkh && fetchLastErrCode == FETCH_OK 46411479Sjkh && strcmp(fetchLastErrString, "Not Modified") == 0) { 46515242Sjkh /* HTTP Not Modified Response, return OK. */ 46615242Sjkh r = 0; 46715242Sjkh goto done; 46816688Sjkh } else 46916688Sjkh goto failure; 47016688Sjkh } 47116688Sjkh if (sigint) 47216688Sjkh goto signal; 47315242Sjkh 47415242Sjkh /* check that size is as expected */ 47511303Sjkh if (S_size) { 47611303Sjkh if (us.size == -1) { 47711303Sjkh warnx("%s: size unknown", URL); 47811593Sjkh } else if (us.size != S_size) { 47911303Sjkh warnx("%s: size mismatch: expected %jd, actual %jd", 48015242Sjkh URL, (intmax_t)S_size, (intmax_t)us.size); 48115242Sjkh goto failure; 48211479Sjkh } 48315355Sjkh } 48411303Sjkh 48511479Sjkh /* symlink instead of copy */ 48611479Sjkh if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) { 48711479Sjkh if (symlink(url->doc, path) == -1) { 48815355Sjkh warn("%s: symlink()", path); 48911593Sjkh goto failure; 49011479Sjkh } 49111593Sjkh goto success; 49211593Sjkh } 49316688Sjkh 49411303Sjkh if (us.size == -1 && !o_stdout && v_level > 0) 49511593Sjkh warnx("%s: size of remote file is not known", URL); 49611479Sjkh if (v_level > 1) { 49711593Sjkh if (sb.st_size != -1) 49811593Sjkh fprintf(stderr, "local size / mtime: %jd / %ld\n", 49911479Sjkh (intmax_t)sb.st_size, (long)sb.st_mtime); 50011303Sjkh if (us.size != -1) 50111593Sjkh fprintf(stderr, "remote size / mtime: %jd / %ld\n", 50211303Sjkh (intmax_t)us.size, (long)us.mtime); 50315355Sjkh } 50415242Sjkh 50511303Sjkh /* open output file */ 50611479Sjkh if (o_stdout) { 50711303Sjkh /* output to stdout */ 50811479Sjkh of = stdout; 50912129Sjkh } else if (r_flag && sb.st_size != -1) { 51024235Sjkh /* resume mode, local file exists */ 51124235Sjkh if (!F_flag && us.mtime && sb.st_mtime != us.mtime) { 51211479Sjkh /* no match! have to refetch */ 51324235Sjkh fclose(f); 51424311Sjkh /* if precious, warn the user and give up */ 51524311Sjkh if (R_flag) { 51624235Sjkh warnx("%s: local modification time " 51711479Sjkh "does not match remote", path); 51815242Sjkh goto failure_keep; 51924235Sjkh } 52015242Sjkh } else if (us.size != -1) { 52111593Sjkh if (us.size == sb.st_size) 52224235Sjkh /* nothing to do */ 52324235Sjkh goto success; 52424235Sjkh if (sb.st_size > us.size) { 52524235Sjkh /* local file too long! */ 52615242Sjkh warnx("%s: local file (%jd bytes) is longer " 52715242Sjkh "than remote file (%jd bytes)", path, 52815242Sjkh (intmax_t)sb.st_size, (intmax_t)us.size); 52911479Sjkh goto failure; 53011479Sjkh } 53111479Sjkh /* we got it, open local file */ 53215242Sjkh if ((of = fopen(path, "a")) == NULL) { 53315242Sjkh warn("%s: fopen()", path); 53411479Sjkh goto failure; 53516366Sjkh } 53617404Sjkh /* check that it didn't move under our feet */ 53711479Sjkh if (fstat(fileno(of), &nsb) == -1) { 53815242Sjkh /* can't happen! */ 53924235Sjkh warn("%s: fstat()", path); 54024235Sjkh goto failure; 54115242Sjkh } 54211303Sjkh if (nsb.st_dev != sb.st_dev || 54311303Sjkh nsb.st_ino != nsb.st_ino || 54411303Sjkh nsb.st_size != sb.st_size) { 54511303Sjkh warnx("%s: file has changed", URL); 54611303Sjkh fclose(of); 54711303Sjkh of = NULL; 54811303Sjkh sb = nsb; 54911303Sjkh } 55011303Sjkh } 55111303Sjkh } else if (m_flag && sb.st_size != -1) { 55211303Sjkh /* mirror mode, local file exists */ 55311303Sjkh if (sb.st_size == us.size && sb.st_mtime == us.mtime) 55411303Sjkh goto success; 55511303Sjkh } 55615355Sjkh 55711303Sjkh if (of == NULL) { 55811303Sjkh /* 55916366Sjkh * We don't yet have an output file; either this is a 56011303Sjkh * vanilla run with no special flags, or the local and 56115512Sjkh * remote files didn't match. 56215512Sjkh */ 56315512Sjkh 56411303Sjkh if (url->offset > 0) { 56511303Sjkh /* 56611303Sjkh * We tried to restart a transfer, but for 56711487Sjkh * some reason gave up - so we have to restart 56814670Sjkh * from scratch if we want the whole file 56911303Sjkh */ 57011303Sjkh url->offset = 0; 57115242Sjkh if ((f = fetchXGet(url, &us, flags)) == NULL) { 57211303Sjkh warnx("%s: %s", URL, fetchLastErrString); 57315883Sjkh goto failure; 57414738Sjkh } 57514670Sjkh if (sigint) 57614670Sjkh goto signal; 57714670Sjkh } 57814670Sjkh 57914738Sjkh /* construct a temp file name */ 58014670Sjkh if (sb.st_size != -1 && S_ISREG(sb.st_mode)) { 58115242Sjkh if ((slash = strrchr(path, '/')) == NULL) 58214670Sjkh slash = path; 58314738Sjkh else 58414670Sjkh ++slash; 58514738Sjkh asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s", 58614670Sjkh (int)(slash - path), path, slash); 58714670Sjkh if (tmppath != NULL) { 58820247Sjkh mkstemps(tmppath, strlen(slash) + 1); 58914670Sjkh of = fopen(tmppath, "w"); 59015419Sjkh chown(tmppath, sb.st_uid, sb.st_gid); 59114670Sjkh chmod(tmppath, sb.st_mode & ALLPERMS); 59214670Sjkh } 59314738Sjkh } 59414738Sjkh if (of == NULL) 59515419Sjkh of = fopen(path, "w"); 59614738Sjkh if (of == NULL) { 59714738Sjkh warn("%s: open()", path); 59814738Sjkh goto failure; 59914738Sjkh } 60014670Sjkh } 60114670Sjkh count = url->offset; 60240372Sjkh 60331150Sjkh /* start the counter */ 60431150Sjkh stat_start(&xs, path, us.size, count); 60531150Sjkh 60631150Sjkh sigalrm = siginfo = sigint = 0; 60731150Sjkh 60825481Sjkh /* suck in the data */ 60925481Sjkh signal(SIGINFO, sig_handler); 61025481Sjkh while (!sigint) { 61125481Sjkh if (us.size != -1 && us.size - count < B_size && 61214670Sjkh us.size - count >= 0) 61311303Sjkh size = us.size - count; 61414670Sjkh else 61515419Sjkh size = B_size; 61614738Sjkh if (siginfo) { 61711593Sjkh stat_end(&xs); 61811303Sjkh siginfo = 0; 619 } 620 if ((size = fread(buf, 1, size, f)) == 0) { 621 if (ferror(f) && errno == EINTR && !sigint) 622 clearerr(f); 623 else 624 break; 625 } 626 stat_update(&xs, count += size); 627 for (ptr = buf; size > 0; ptr += wr, size -= wr) 628 if ((wr = fwrite(ptr, 1, size, of)) < size) { 629 if (ferror(of) && errno == EINTR && !sigint) 630 clearerr(of); 631 else 632 break; 633 } 634 if (size != 0) 635 break; 636 } 637 if (!sigalrm) 638 sigalrm = ferror(f) && errno == ETIMEDOUT; 639 signal(SIGINFO, SIG_DFL); 640 641 stat_end(&xs); 642 643 /* 644 * If the transfer timed out or was interrupted, we still want to 645 * set the mtime in case the file is not removed (-r or -R) and 646 * the user later restarts the transfer. 647 */ 648 signal: 649 /* set mtime of local file */ 650 if (!n_flag && us.mtime && !o_stdout && of != NULL && 651 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) { 652 struct timeval tv[2]; 653 654 fflush(of); 655 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime); 656 tv[1].tv_sec = (long)us.mtime; 657 tv[0].tv_usec = tv[1].tv_usec = 0; 658 if (utimes(tmppath ? tmppath : path, tv)) 659 warn("%s: utimes()", tmppath ? tmppath : path); 660 } 661 662 /* timed out or interrupted? */ 663 if (sigalrm) 664 warnx("transfer timed out"); 665 if (sigint) { 666 warnx("transfer interrupted"); 667 goto failure; 668 } 669 670 /* timeout / interrupt before connection completley established? */ 671 if (f == NULL) 672 goto failure; 673 674 if (!sigalrm) { 675 /* check the status of our files */ 676 if (ferror(f)) 677 warn("%s", URL); 678 if (ferror(of)) 679 warn("%s", path); 680 if (ferror(f) || ferror(of)) 681 goto failure; 682 } 683 684 /* did the transfer complete normally? */ 685 if (us.size != -1 && count < us.size) { 686 warnx("%s appears to be truncated: %jd/%jd bytes", 687 path, (intmax_t)count, (intmax_t)us.size); 688 goto failure_keep; 689 } 690 691 /* 692 * If the transfer timed out and we didn't know how much to 693 * expect, assume the worst (i.e. we didn't get all of it) 694 */ 695 if (sigalrm && us.size == -1) { 696 warnx("%s may be truncated", path); 697 goto failure_keep; 698 } 699 700 success: 701 r = 0; 702 if (tmppath != NULL && rename(tmppath, path) == -1) { 703 warn("%s: rename()", path); 704 goto failure_keep; 705 } 706 goto done; 707 failure: 708 if (of && of != stdout && !R_flag && !r_flag) 709 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG)) 710 unlink(tmppath ? tmppath : path); 711 if (R_flag && tmppath != NULL && sb.st_size == -1) 712 rename(tmppath, path); /* ignore errors here */ 713 failure_keep: 714 r = -1; 715 goto done; 716 done: 717 if (f) 718 fclose(f); 719 if (of && of != stdout) 720 fclose(of); 721 if (url) 722 fetchFreeURL(url); 723 if (tmppath != NULL) 724 free(tmppath); 725 return (r); 726} 727 728static void 729usage(void) 730{ 731 fprintf(stderr, "%s\n%s\n%s\n%s\n", 732"usage: fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [-N file] [-o file] [-S bytes]", 733" [-T seconds] [-w seconds] [-i file] URL ...", 734" fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [-N file] [-o file] [-S bytes]", 735" [-T seconds] [-w seconds] [-i file] -h host -f file [-c dir]"); 736} 737 738 739/* 740 * Entry point 741 */ 742int 743main(int argc, char *argv[]) 744{ 745 struct stat sb; 746 struct sigaction sa; 747 const char *p, *s; 748 char *end, *q; 749 int c, e, r; 750 751 while ((c = getopt(argc, argv, 752 "146AaB:bc:dFf:Hh:i:lMmN:nPpo:qRrS:sT:tUvw:")) != -1) 753 switch (c) { 754 case '1': 755 once_flag = 1; 756 break; 757 case '4': 758 family = PF_INET; 759 break; 760 case '6': 761 family = PF_INET6; 762 break; 763 case 'A': 764 A_flag = 1; 765 break; 766 case 'a': 767 a_flag = 1; 768 break; 769 case 'B': 770 B_size = (off_t)strtol(optarg, &end, 10); 771 if (*optarg == '\0' || *end != '\0') 772 errx(1, "invalid buffer size (%s)", optarg); 773 break; 774 case 'b': 775 warnx("warning: the -b option is deprecated"); 776 b_flag = 1; 777 break; 778 case 'c': 779 c_dirname = optarg; 780 break; 781 case 'd': 782 d_flag = 1; 783 break; 784 case 'F': 785 F_flag = 1; 786 break; 787 case 'f': 788 f_filename = optarg; 789 break; 790 case 'H': 791 warnx("the -H option is now implicit, " 792 "use -U to disable"); 793 break; 794 case 'h': 795 h_hostname = optarg; 796 break; 797 case 'i': 798 i_flag = 1; 799 i_filename = optarg; 800 break; 801 case 'l': 802 l_flag = 1; 803 break; 804 case 'o': 805 o_flag = 1; 806 o_filename = optarg; 807 break; 808 case 'M': 809 case 'm': 810 if (r_flag) 811 errx(1, "the -m and -r flags " 812 "are mutually exclusive"); 813 m_flag = 1; 814 break; 815 case 'N': 816 N_filename = optarg; 817 break; 818 case 'n': 819 n_flag = 1; 820 break; 821 case 'P': 822 case 'p': 823 p_flag = 1; 824 break; 825 case 'q': 826 v_level = 0; 827 break; 828 case 'R': 829 R_flag = 1; 830 break; 831 case 'r': 832 if (m_flag) 833 errx(1, "the -m and -r flags " 834 "are mutually exclusive"); 835 r_flag = 1; 836 break; 837 case 'S': 838 S_size = (off_t)strtol(optarg, &end, 10); 839 if (*optarg == '\0' || *end != '\0') 840 errx(1, "invalid size (%s)", optarg); 841 break; 842 case 's': 843 s_flag = 1; 844 break; 845 case 'T': 846 T_secs = strtol(optarg, &end, 10); 847 if (*optarg == '\0' || *end != '\0') 848 errx(1, "invalid timeout (%s)", optarg); 849 break; 850 case 't': 851 t_flag = 1; 852 warnx("warning: the -t option is deprecated"); 853 break; 854 case 'U': 855 U_flag = 1; 856 break; 857 case 'v': 858 v_level++; 859 break; 860 case 'w': 861 a_flag = 1; 862 w_secs = strtol(optarg, &end, 10); 863 if (*optarg == '\0' || *end != '\0') 864 errx(1, "invalid delay (%s)", optarg); 865 break; 866 default: 867 usage(); 868 exit(1); 869 } 870 871 argc -= optind; 872 argv += optind; 873 874 if (h_hostname || f_filename || c_dirname) { 875 if (!h_hostname || !f_filename || argc) { 876 usage(); 877 exit(1); 878 } 879 /* XXX this is a hack. */ 880 if (strcspn(h_hostname, "@:/") != strlen(h_hostname)) 881 errx(1, "invalid hostname"); 882 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname, 883 c_dirname ? c_dirname : "", f_filename) == -1) 884 errx(1, "%s", strerror(ENOMEM)); 885 argc++; 886 } 887 888 if (!argc) { 889 usage(); 890 exit(1); 891 } 892 893 /* allocate buffer */ 894 if (B_size < MINBUFSIZE) 895 B_size = MINBUFSIZE; 896 if ((buf = malloc(B_size)) == NULL) 897 errx(1, "%s", strerror(ENOMEM)); 898 899 /* timeouts */ 900 if ((s = getenv("FTP_TIMEOUT")) != NULL) { 901 ftp_timeout = strtol(s, &end, 10); 902 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) { 903 warnx("FTP_TIMEOUT (%s) is not a positive integer", s); 904 ftp_timeout = 0; 905 } 906 } 907 if ((s = getenv("HTTP_TIMEOUT")) != NULL) { 908 http_timeout = strtol(s, &end, 10); 909 if (*s == '\0' || *end != '\0' || http_timeout < 0) { 910 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s); 911 http_timeout = 0; 912 } 913 } 914 915 /* signal handling */ 916 sa.sa_flags = 0; 917 sa.sa_handler = sig_handler; 918 sigemptyset(&sa.sa_mask); 919 sigaction(SIGALRM, &sa, NULL); 920 sa.sa_flags = SA_RESETHAND; 921 sigaction(SIGINT, &sa, NULL); 922 fetchRestartCalls = 0; 923 924 /* output file */ 925 if (o_flag) { 926 if (strcmp(o_filename, "-") == 0) { 927 o_stdout = 1; 928 } else if (stat(o_filename, &sb) == -1) { 929 if (errno == ENOENT) { 930 if (argc > 1) 931 errx(1, "%s is not a directory", 932 o_filename); 933 } else { 934 err(1, "%s", o_filename); 935 } 936 } else { 937 if (sb.st_mode & S_IFDIR) 938 o_directory = 1; 939 } 940 } 941 942 /* check if output is to a tty (for progress report) */ 943 v_tty = isatty(STDERR_FILENO); 944 if (v_tty) 945 pgrp = getpgrp(); 946 947 r = 0; 948 949 /* authentication */ 950 if (v_tty) 951 fetchAuthMethod = query_auth; 952 if (N_filename != NULL) 953 setenv("NETRC", N_filename, 1); 954 955 while (argc) { 956 if ((p = strrchr(*argv, '/')) == NULL) 957 p = *argv; 958 else 959 p++; 960 961 if (!*p) 962 p = "fetch.out"; 963 964 fetchLastErrCode = 0; 965 966 if (o_flag) { 967 if (o_stdout) { 968 e = fetch(*argv, "-"); 969 } else if (o_directory) { 970 asprintf(&q, "%s/%s", o_filename, p); 971 e = fetch(*argv, q); 972 free(q); 973 } else { 974 e = fetch(*argv, o_filename); 975 } 976 } else { 977 e = fetch(*argv, p); 978 } 979 980 if (sigint) 981 kill(getpid(), SIGINT); 982 983 if (e == 0 && once_flag) 984 exit(0); 985 986 if (e) { 987 r = 1; 988 if ((fetchLastErrCode 989 && fetchLastErrCode != FETCH_UNAVAIL 990 && fetchLastErrCode != FETCH_MOVED 991 && fetchLastErrCode != FETCH_URL 992 && fetchLastErrCode != FETCH_RESOLV 993 && fetchLastErrCode != FETCH_UNKNOWN)) { 994 if (w_secs && v_level) 995 fprintf(stderr, "Waiting %ld seconds " 996 "before retrying\n", w_secs); 997 if (w_secs) 998 sleep(w_secs); 999 if (a_flag) 1000 continue; 1001 } 1002 } 1003 1004 argc--, argv++; 1005 } 1006 1007 exit(r); 1008} 1009