From a94554d010844e17ecf674fe738679f09cbc6c21 Mon Sep 17 00:00:00 2001 From: Denis Vlasenko Date: Sat, 23 Sep 2006 17:49:09 +0000 Subject: wget: fix bug where wget creates null file if there is no remote one. add O_LARGEFILE support (not run tested :). --- networking/wget.c | 116 ++++++++++++++++++------------------------------------ 1 file changed, 38 insertions(+), 78 deletions(-) (limited to 'networking/wget.c') diff --git a/networking/wget.c b/networking/wget.c index 1a80972fc..4b55b93f4 100644 --- a/networking/wget.c +++ b/networking/wget.c @@ -9,7 +9,6 @@ #include "busybox.h" #include - struct host_info { char *host; int port; @@ -39,14 +38,6 @@ enum { static void progressmeter(int flag) {} #endif -static void close_and_delete_outfile(FILE* output, char *fname_out, int do_continue) -{ - if (output != stdout && do_continue == 0) { - fclose(output); - unlink(fname_out); - } -} - /* Read NMEMB elements of SIZE bytes into PTR from STREAM. Returns the * number of elements read, and a short count if an eof or non-interrupt * error is encountered. */ @@ -62,21 +53,6 @@ static size_t safe_fread(void *ptr, size_t size, size_t nmemb, FILE *stream) return ret; } -/* Write NMEMB elements of SIZE bytes from PTR to STREAM. Returns the - * number of elements written, and a short count if an eof or non-interrupt - * error is encountered. */ -static size_t safe_fwrite(void *ptr, size_t size, size_t nmemb, FILE *stream) -{ - size_t ret = 0; - - do { - clearerr(stream); - ret += fwrite((char *)ptr + (ret * size), size, nmemb - ret, stream); - } while (ret < nmemb && ferror(stream) && errno == EINTR); - - return ret; -} - /* Read a line or SIZE - 1 bytes into S, whichever is less, from STREAM. * Returns S, or NULL if an eof or non-interrupt error is encountered. */ static char *safe_fgets(char *s, int size, FILE *stream) @@ -91,11 +67,6 @@ static char *safe_fgets(char *s, int size, FILE *stream) return ret; } -#define close_delete_and_die(s...) { \ - close_and_delete_outfile(output, fname_out, do_continue); \ - bb_error_msg_and_die(s); } - - #ifdef CONFIG_FEATURE_WGET_AUTHENTICATION /* * Base64-encode character string and return the string. @@ -138,7 +109,6 @@ int wget_main(int argc, char **argv) char *proxy = 0; char *dir_prefix=NULL; char *s, buf[512]; - struct stat sbuf; char extra_headers[1024]; char *extra_headers_ptr = extra_headers; int extra_headers_left = sizeof(extra_headers); @@ -150,9 +120,9 @@ int wget_main(int argc, char **argv) FILE *dfp = NULL; /* socket to ftp server (data) */ char *fname_out = NULL; /* where to direct output (-O) */ int do_continue = 0; /* continue a prev transfer (-c) */ - long beg_range = 0L; /* range at which continue begins */ + off64_t beg_range = 0; /* range at which continue begins */ int got_clen = 0; /* got content-length: from server */ - FILE *output; /* socket to web server */ + int output_fd = -1; int quiet_flag = FALSE; /* Be verry, verry quiet... */ int use_proxy = 1; /* Use proxies if env vars are set */ char *proxy_flag = "on"; /* Use proxies if env vars are set */ @@ -221,7 +191,7 @@ int wget_main(int argc, char **argv) #endif bb_get_last_path_component(target.path); } - if (fname_out == NULL || strlen(fname_out) < 1) { + if (!fname_out || !fname_out[0]) { fname_out = #ifdef CONFIG_FEATURE_WGET_STATUSBAR curfile = @@ -238,27 +208,22 @@ int wget_main(int argc, char **argv) if (do_continue && !fname_out) bb_error_msg_and_die("cannot specify continue (-c) without a filename (-O)"); - - /* - * Open the output file stream. - */ - if (strcmp(fname_out, "-") == 0) { - output = stdout; - quiet_flag = TRUE; - } else { - output = xfopen(fname_out, (do_continue ? "a" : "w")); - } - /* * Determine where to start transfer. */ - if (do_continue) { - if (fstat(fileno(output), &sbuf) < 0) - bb_perror_msg_and_die("fstat"); - if (sbuf.st_size > 0) - beg_range = sbuf.st_size; - else - do_continue = 0; + if (!strcmp(fname_out, "-")) { + output_fd = 1; + quiet_flag = TRUE; + do_continue = 0; + } else if (do_continue) { + output_fd = open(fname_out, O_WRONLY|O_LARGEFILE); + if (output_fd >= 0) { + beg_range = lseek64(output_fd, 0, SEEK_END); + if (beg_range == (off64_t)-1) + bb_perror_msg_and_die("lseek64"); + } + /* File doesn't exist. We do not create file here yet. + We are not sure it exists on remove side */ } /* We want to do exactly _one_ DNS lookup, since some @@ -279,7 +244,7 @@ int wget_main(int argc, char **argv) got_clen = chunked = 0; if (!--try) - close_delete_and_die("too many redirections"); + bb_error_msg_and_die("too many redirections"); /* * Open socket to http server @@ -317,8 +282,8 @@ int wget_main(int argc, char **argv) } #endif - if (do_continue) - fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range); + if (beg_range) + fprintf(sfp, "Range: bytes=%lld-\r\n", (long long)beg_range); if(extra_headers_left < sizeof(extra_headers)) fputs(extra_headers,sfp); fprintf(sfp,"Connection: close\r\n\r\n"); @@ -328,7 +293,7 @@ int wget_main(int argc, char **argv) */ read_response: if (fgets(buf, sizeof(buf), sfp) == NULL) - close_delete_and_die("no response from server"); + bb_error_msg_and_die("no response from server"); for (s = buf ; *s != '\0' && !isspace(*s) ; ++s) ; @@ -340,9 +305,6 @@ read_response: while (gethdr(buf, sizeof(buf), sfp, &n) != NULL); goto read_response; case 200: - if (do_continue && output != stdout) - output = freopen(fname_out, "w", output); - do_continue = 0; break; case 300: /* redirection */ case 301: @@ -350,12 +312,12 @@ read_response: case 303: break; case 206: - if (do_continue) + if (beg_range) break; /*FALLTHRU*/ default: chomp(buf); - close_delete_and_die("server returned error %d: %s", atoi(s), buf); + bb_error_msg_and_die("server returned error %d: %s", atoi(s), buf); } /* @@ -365,7 +327,7 @@ read_response: if (strcasecmp(buf, "content-length") == 0) { unsigned long value; if (safe_strtoul(s, &value)) { - close_delete_and_die("content-length %s is garbage", s); + bb_error_msg_and_die("content-length %s is garbage", s); } filesize = value; got_clen = 1; @@ -375,7 +337,7 @@ read_response: if (strcasecmp(s, "chunked") == 0) { chunked = got_clen = 1; } else { - close_delete_and_die("server wants to do %s transfer encoding", s); + bb_error_msg_and_die("server wants to do %s transfer encoding", s); } } if (strcasecmp(buf, "location") == 0) { @@ -407,7 +369,7 @@ read_response: sfp = open_socket(&s_in); if (ftpcmd(NULL, NULL, sfp, buf) != 220) - close_delete_and_die("%s", buf+4); + bb_error_msg_and_die("%s", buf+4); /* * Splitting username:password pair, @@ -424,7 +386,7 @@ read_response: break; /* FALLTHRU (failed login) */ default: - close_delete_and_die("ftp login: %s", buf+4); + bb_error_msg_and_die("ftp login: %s", buf+4); } ftpcmd("TYPE I", NULL, sfp, buf); @@ -435,7 +397,7 @@ read_response: if (ftpcmd("SIZE ", target.path, sfp, buf) == 213) { unsigned long value; if (safe_strtoul(buf+4, &value)) { - close_delete_and_die("SIZE value is garbage"); + bb_error_msg_and_die("SIZE value is garbage"); } filesize = value; got_clen = 1; @@ -445,7 +407,7 @@ read_response: * Entering passive mode */ if (ftpcmd("PASV", NULL, sfp, buf) != 227) - close_delete_and_die("PASV: %s", buf+4); + bb_error_msg_and_die("PASV: %s", buf+4); s = strrchr(buf, ','); *s = 0; port = atoi(s+1); @@ -454,18 +416,14 @@ read_response: s_in.sin_port = htons(port); dfp = open_socket(&s_in); - if (do_continue) { - sprintf(buf, "REST %ld", beg_range); - if (ftpcmd(buf, NULL, sfp, buf) != 350) { - if (output != stdout) - output = freopen(fname_out, "w", output); - do_continue = 0; - } else + if (beg_range) { + sprintf(buf, "REST %lld", (long long)beg_range); + if (ftpcmd(buf, NULL, sfp, buf) == 350) filesize -= beg_range; } if (ftpcmd("RETR ", target.path, sfp, buf) > 150) - close_delete_and_die("RETR: %s", buf+4); + bb_error_msg_and_die("RETR: %s", buf+4); } @@ -488,7 +446,9 @@ read_response: n = safe_fread(buf, 1, rdsz, dfp); if (n <= 0) break; - if (safe_fwrite(buf, 1, n, output) != n) { + if (output_fd < 0) + output_fd = xopen3(fname_out, O_WRONLY|O_CREAT|O_EXCL|O_TRUNC|O_LARGEFILE, 0666); + if (full_write(output_fd, buf, n) != n) { bb_perror_msg_and_die(bb_msg_write_error); } #ifdef CONFIG_FEATURE_WGET_STATUSBAR @@ -526,7 +486,7 @@ read_response: } -void parse_url(char *url, struct host_info *h) +static void parse_url(char *url, struct host_info *h) { char *cp, *sp, *up, *pp; @@ -581,7 +541,7 @@ void parse_url(char *url, struct host_info *h) } -FILE *open_socket(struct sockaddr_in *s_in) +static FILE *open_socket(struct sockaddr_in *s_in) { FILE *fp; @@ -593,7 +553,7 @@ FILE *open_socket(struct sockaddr_in *s_in) } -char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc) +static char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc) { char *s, *hdrval; int c; -- cgit v1.2.3