754 lines
16 KiB
C
754 lines
16 KiB
C
/* $NetBSD: ftpio.c,v 1.9 2000/01/26 02:12:14 hubertf Exp $ */
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/* Id: foo2.c,v 1.12 1999/12/17 02:31:57 feyrer Exp feyrer */
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/*
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* Work to implement wildcard dependency processing via FTP for the
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* NetBSD pkg_* package tools.
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*
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* Copyright (c) 1999 Hubert Feyrer <hubertf@netbsd.org>
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*/
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/signal.h>
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#include <assert.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <regex.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <vis.h>
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#include "../lib/lib.h"
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/*
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* Names of environment variables used to pass things to
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* subprocesses, for connection caching.
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*/
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#define PKG_FTPIO_COMMAND "PKG_FTPIO_COMMAND"
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#define PKG_FTPIO_ANSWER "PKG_FTPIO_ANSWER"
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#define PKG_FTPIO_CNT "PKG_FTPIO_CNT"
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#define PKG_FTPIO_CURRENTHOST "PKG_FTPIO_CURRENTHOST"
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#define PKG_FTPIO_CURRENTDIR "PKG_FTPIO_CURRENTDIR"
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#undef STANDALONE /* define for standalone debugging */
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/* File descriptors */
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typedef struct {
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int command;
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int answer;
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} fds;
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#if EXPECT_DEBUG
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static int expect_debug = 1;
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#endif /* EXPECT_DEBUG */
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#ifdef STANDALONE
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int Verbose=1;
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#endif
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static int needclose=0;
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static int ftp_started=0;
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static fds ftpio;
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/*
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* expect "str" (a regular expression) on file descriptor "fd", storing
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* the FTP return code of the command in the integer "ftprc". The "str"
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* string is expected to match some FTP return codes after a '\n', e.g.
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* "\n(550|226).*\n"
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*/
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static int
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expect(int fd, const char *str, int *ftprc)
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{
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int rc;
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char buf[90];
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#if EXPECT_DEBUG
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char *vstr;
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#endif /* EXPECT_DEBUG */
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regex_t rstr;
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int done;
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struct timeval timeout;
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int retval;
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regmatch_t pmatch;
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int verbose_expect=0;
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#if EXPECT_DEBUG
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vstr=malloc(2*sizeof(buf));
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if (vstr == NULL)
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err(1, "expect: malloc() failed");
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strvis(vstr, str, VIS_NL|VIS_SAFE|VIS_CSTYLE);
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#endif /* EXPECT_DEBUG */
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if (regcomp(&rstr, str, REG_EXTENDED) != 0)
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err(1, "expect: regcomp() failed");
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#if EXPECT_DEBUG
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if (expect_debug)
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printf("expecting \"%s\" on fd %d ...\n", vstr, fd);
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#endif /* EXPECT_DEBUG */
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if(0) setbuf(stdout, NULL);
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memset(buf, '#', sizeof(buf));
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timeout.tv_sec=5*60;
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timeout.tv_usec=0;
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done=0;
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retval=0;
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while(!done) {
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fd_set fdset;
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FD_ZERO(&fdset);
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FD_SET(fd, &fdset);
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rc = select(FD_SETSIZE, &fdset, NULL, NULL, &timeout);
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switch (rc) {
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case -1:
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warn("expect: select() failed (probably ftp died because of bad args)");
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done = 1;
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retval = -1;
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break;
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case 0:
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warnx("expect: select() timeout!");
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done = 1; /* hope that's ok */
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retval = -1;
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break;
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default:
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rc=read(fd,&buf[sizeof(buf)-1],1);
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if (verbose_expect)
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putchar(buf[sizeof(buf)-1]);
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#if EXPECT_DEBUG
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{
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char *v=malloc(2*sizeof(buf));
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strvis(v, buf, VIS_NL|VIS_SAFE|VIS_CSTYLE);
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if (expect_debug)
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printf("expect=<%s>, buf=<%*s>\n", vstr, strlen(v), v);
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free(v);
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}
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#endif /* EXPECT_DEBUG */
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if (regexec(&rstr, buf, 1, &pmatch, 0) == 0) {
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#if EXPECT_DEBUG
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if (expect_debug)
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printf("Gotcha -> %s!\n", buf+pmatch.rm_so+1);
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fflush(stdout);
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#endif /* EXPECT_DEBUG */
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if (ftprc && isdigit(buf[pmatch.rm_so+1]))
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*ftprc = atoi(buf+pmatch.rm_so+1);
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done=1;
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retval=0;
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}
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memmove(buf, buf+1, sizeof(buf)-1); /* yes, this is non-performant */
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break;
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}
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}
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#if EXPECT_DEBUG
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printf("done.\n");
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if (str)
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free(vstr);
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#endif /* EXPECT_DEBUG */
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return retval;
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}
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/*
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* send a certain ftp-command "cmd" to our FTP coprocess, and wait for
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* "expectstr" to be returned. Return numeric FTP return code.
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*/
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static int
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ftp_cmd(const char *cmd, const char *expectstr)
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{
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int rc=0, verbose_ftp=0;
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if (Verbose)
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verbose_ftp=1;
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if (verbose_ftp)
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fprintf(stderr, "\n[1mftp> %s[0m", cmd);
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fflush(stdout);
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rc=write(ftpio.command, cmd, strlen(cmd));
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if (rc == strlen(cmd)) {
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if (expectstr) {
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expect(ftpio.answer, expectstr, &rc);
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}
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} else {
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if (Verbose)
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warn("short write");
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}
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return rc;
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}
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/*
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* Really fire up FTP coprocess
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*/
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static int
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setupCoproc(const char *base)
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{
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int command_pipe[2];
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int answer_pipe[2];
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int rc1, rc2;
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char buf[20];
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rc1 = pipe(command_pipe);
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rc2 = pipe(answer_pipe);
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if(rc1==-1 || rc2==-1) {
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warn("setupCoproc: pipe() failed");
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return -1;
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}
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rc1=fork();
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switch (rc1) {
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case -1:
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/* Error */
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warn("setupCoproc: fork() failed");
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return -1;
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break;
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case 0:
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/* Child */
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close(command_pipe[1]);
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dup2(command_pipe[0], 0);
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close(command_pipe[0]);
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close(answer_pipe[0]);
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dup2(answer_pipe[1], 1);
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close(answer_pipe[1]);
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setbuf(stdout, NULL);
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if (Verbose)
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fprintf(stderr, "[1mftp -detv %s[0m\n", base);
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rc1 = execl("/usr/bin/ftp", "ftp", "-detv", base, NULL);
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warn("setupCoproc: execl() failed");
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exit(-1);
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break;
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default:
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/* Parent */
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close(command_pipe[0]);
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close(answer_pipe[1]);
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snprintf(buf, sizeof(buf), "%d", command_pipe[1]);
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setenv(PKG_FTPIO_COMMAND, buf, 1);
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snprintf(buf, sizeof(buf), "%d", answer_pipe[0]);
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setenv(PKG_FTPIO_ANSWER, buf, 1);
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ftpio.command = command_pipe[1];
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ftpio.answer = answer_pipe[0];
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fcntl(ftpio.command, F_SETFL, O_NONBLOCK);
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fcntl(ftpio.answer , F_SETFL, O_NONBLOCK);
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break;
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}
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return 0;
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}
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/*
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* SIGPIPE only happens when there's something wrong with the FTP
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* coprocess. In that case, set mark to not try to close shut down
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* the coprocess.
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*/
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static void
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sigpipe_handler(int n)
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{
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/* aparently our ftp companion died */
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if (Verbose)
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fprintf(stderr, "SIGPIPE!\n");
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needclose = 0;
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}
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/*
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* Close the FTP coprocess' current connection, but
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* keep the process itself alive.
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*/
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void
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ftp_stop(void)
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{
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char *tmp1, *tmp2;
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if (!ftp_started)
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return;
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tmp1=getenv(PKG_FTPIO_COMMAND);
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tmp2=getenv(PKG_FTPIO_ANSWER);
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/* (Only) the last one closes the link */
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if (tmp1 != NULL && tmp2 != NULL) {
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if (needclose)
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ftp_cmd("close\n", "\n(221 Goodbye.|Not connected.)\n");
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close(ftpio.command);
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close(ftpio.answer);
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}
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unsetenv(PKG_FTPIO_COMMAND);
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unsetenv(PKG_FTPIO_ANSWER);
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}
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/*
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* (Start and re-)Connect the FTP coprocess to some host/dir.
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* If the requested host/dir is different than the one that the
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* coprocess is currently at, close first.
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*/
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static int
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ftp_start(char *base)
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{
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char *tmp1, *tmp2;
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int rc;
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char newHost[256];
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char newDir[1024];
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char *currentHost=getenv(PKG_FTPIO_CURRENTHOST);
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char *currentDir=getenv(PKG_FTPIO_CURRENTDIR);
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fileURLHost(base, newHost, sizeof(newHost));
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strcpy(newDir, strchr(base+URLlength(base), '/') + 1);
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if (currentHost
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&& currentDir
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&& ( strcmp(newHost, currentHost) != 0
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|| strcmp(newDir, currentDir) != 0)) { /* could handle new dir case better here, w/o reconnect */
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if (Verbose) {
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printf("ftp_stgart: new host or dir, stopping previous connect...\n");
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printf("currentHost='%s', newHost='%s'\n", currentHost, newHost);
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printf("currentDir='%s', newDir='%s'\n", currentDir, newDir);
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}
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ftp_stop();
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if (Verbose)
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printf("ftp stopped\n");
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}
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setenv(PKG_FTPIO_CURRENTHOST, newHost, 1); /* need to update this in the environment */
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setenv(PKG_FTPIO_CURRENTDIR, newDir, 1); /* for subprocesses to have this available */
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tmp1=getenv(PKG_FTPIO_COMMAND);
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tmp2=getenv(PKG_FTPIO_ANSWER);
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if(tmp1==NULL || tmp2==NULL || *tmp1=='\0' || *tmp2=='\0') {
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/* no FTP coprocess running yet */
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if (Verbose)
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printf("Spawning FTP coprocess\n");
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rc = setupCoproc(base);
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if (rc == -1) {
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warnx("setupCoproc() failed");
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return -1;
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}
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needclose=1;
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signal(SIGPIPE, sigpipe_handler);
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if ((expect(ftpio.answer, "\n(221|250|221|550).*\n", &rc) != 0)
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|| rc != 250) {
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warnx("expect1 failed, rc=%d", rc);
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return -1;
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}
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rc = ftp_cmd("prompt off\n", "\n(Interactive mode off|221).*\n");
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if (rc == 221) {
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/* something is wrong */
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ftp_started=1; /* not really, but for ftp_stop() */
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ftp_stop();
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}
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ftp_started=1;
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} else {
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/* get FDs of our coprocess */
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ftpio.command = dup(atoi(tmp1));
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ftpio.answer = dup(atoi(tmp2));
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if (Verbose)
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printf("Reusing FDs %s/%s for communication to FTP coprocess\n", tmp1, tmp2);
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fcntl(ftpio.command, F_SETFL, O_NONBLOCK);
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fcntl(ftpio.answer , F_SETFL, O_NONBLOCK);
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}
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return 0;
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}
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/*
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* Expand the given wildcard URL "wildcardurl" if possible, and store the
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* expanded value into "expandedurl". return 0 if successful, -1 else.
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*/
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int
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expandURL(char *expandedurl, const char *wildcardurl)
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{
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char *pkg;
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int rc;
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char base[FILENAME_MAX];
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pkg=strrchr(wildcardurl, '/');
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if (pkg == NULL){
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warnx("expandURL: no '/' in url %s?!", wildcardurl);
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return -1;
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}
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snprintf(base, FILENAME_MAX, "%*.*s/", (int)(pkg-wildcardurl),
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(int)(pkg-wildcardurl), wildcardurl);
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pkg++;
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rc = ftp_start(base);
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if (rc == -1) {
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warnx("ftp_start() failed");
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return -1; /* error */
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}
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/* for a given wildcard URL, find the best matching pkg */
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{
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char *s, buf[FILENAME_MAX];
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char tmpname[FILENAME_MAX];
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char best[FILENAME_MAX];
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strcpy(tmpname, "/tmp/pkg.XXX");
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mktemp(tmpname);
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assert(tmpname != NULL);
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s=strpbrk(pkg, "<>[]?*{"); /* Could leave out "[]?*" here;
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* ftp(1) is not that stupid */
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if (!s) {
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/* This should only happen when getting here with (only) a package
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* name specified to pkg_add, and PKG_PATH containing some URL.
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*/
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snprintf(buf,FILENAME_MAX, "ls %s %s\n", pkg, tmpname);
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} else {
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/* replace possible version(wildcard) given with "-*".
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* we can't use the pkg wildcards here as dewey compare
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* and alternates won't be handled by ftp(1); sort
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* out later, using pmatch() */
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snprintf(buf, FILENAME_MAX, "ls %*.*s*.tgz %s\n",
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(int)(s-pkg), (int)(s-pkg), pkg, tmpname);
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}
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rc = ftp_cmd(buf, "\n(550|226).*\n"); /* catch errors */
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if (rc != 226) {
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if (Verbose)
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warnx("ls failed!");
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return -1;
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}
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/* Sync - don't remove */
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rc = ftp_cmd("cd .\n", "\n(550|250).*\n");
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if (rc != 250) {
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warnx("chdir failed!");
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return -1;
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}
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best[0]='\0';
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if (access(tmpname, R_OK)==0) {
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int matches;
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FILE *f;
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char filename[FILENAME_MAX];
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f=fopen(tmpname, "r");
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if (f == NULL) {
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warn("fopen");
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return -1;
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}
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matches=0;
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/* The following loop is basically the same as the readdir() loop
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* in findmatchingname() */
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while (fgets(filename, FILENAME_MAX, f)) {
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filename[strlen(filename)-1] = '\0';
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if (pmatch(pkg, filename)) {
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matches++;
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/* compare findbestmatchingname() */
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findbestmatchingname_fn(filename, best);
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}
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}
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fclose(f);
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if (matches == 0)
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warnx("nothing appropriate found\n");
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}
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unlink(tmpname);
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if (best[0] != '\0') {
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if (Verbose)
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printf("best match: '%s%s'\n", base, best);
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sprintf(expandedurl, "%s%s", base, best);
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}
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}
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return 0;
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}
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/*
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* extract the given (expanded) URL "url" to the given directory "dir"
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* return -1 on error, 0 else;
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*/
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int
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unpackURL(const char *url, const char *dir)
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{
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char *pkg;
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int rc;
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char base[FILENAME_MAX];
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char pkg_path[FILENAME_MAX];
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{
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/* Verify if the url is really ok */
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int rc;
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char exp[FILENAME_MAX];
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rc=expandURL(exp, url);
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if (rc == -1) {
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warnx("unpackURL: verification expandURL failed");
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return -1;
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}
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if (strcmp(exp, url) != 0) {
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warnx("unpackURL: verificatinon expandURL failed, '%s'!='%s'",
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exp, url);
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return -1;
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}
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}
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pkg=strrchr(url, '/');
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if (pkg == NULL){
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warnx("unpackURL: no '/' in url %s?!", url);
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return -1;
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}
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snprintf(base, FILENAME_MAX, "%*.*s/", (int)(pkg-url),
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(int)(pkg-url), url);
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snprintf(pkg_path, FILENAME_MAX, "%*.*s", (int)(pkg-url),
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(int)(pkg-url), url); /* no trailing '/' */
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pkg++;
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/* Leave a hint for any depending pkgs that may need it */
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if (getenv("PKG_PATH") == NULL) {
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setenv("PKG_PATH", pkg_path, 1);
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printf("setenv PKG_PATH='%s'\n",pkg_path);
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}
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rc = ftp_start(base);
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if (rc == -1) {
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warnx("ftp_start() failed");
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return -1; /* error */
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}
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{
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char cmd[1024];
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if (Verbose)
|
||
printf("unpackURL '%s' to '%s'\n", url, dir);
|
||
|
||
/* yes, this is gross, but needed for borken ftp(1) */
|
||
snprintf(cmd, sizeof(cmd), "get %s \"| ( cd %s ; gunzip 2>/dev/null | tar -%sx -f - )\"\n", pkg, dir, Verbose?"vv":"");
|
||
rc = ftp_cmd(cmd, "\n(226|550).*\n");
|
||
if (rc != 226) {
|
||
warnx("Cannot fetch file (%d!=226)!", rc);
|
||
return -1;
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
#if 0
|
||
/*
|
||
* Some misc stuff not needed yet, but maybe later
|
||
*/
|
||
int
|
||
miscstuff(const char *url)
|
||
{
|
||
char *pkg;
|
||
int rc;
|
||
char base[FILENAME_MAX];
|
||
|
||
pkg=strrchr(url, '/');
|
||
if (pkg == NULL){
|
||
warnx("miscstuff: no '/' in url %s?!", url);
|
||
return -1;
|
||
}
|
||
snprintf(base, FILENAME_MAX, "%*.*s/", (int)(pkg-url), (int)(pkg-url),
|
||
url);
|
||
pkg++;
|
||
|
||
rc = ftp_start(base);
|
||
if (rc == -1) {
|
||
warnx("ftp_start() failed");
|
||
return -1; /* error */
|
||
}
|
||
|
||
/* basic operation */
|
||
if (0) {
|
||
rc = ftp_cmd("cd ../All\n", "\n(550|250).*\n");
|
||
if (rc != 250) {
|
||
warnx("chdir failed!");
|
||
return -1;
|
||
}
|
||
}
|
||
|
||
/* get and extract a file to tmpdir */
|
||
if (0) {
|
||
char cmd[256];
|
||
char tmpdir[256];
|
||
|
||
snprintf(tmpdir, sizeof(tmpdir), "/tmp/dir%s",
|
||
(getenv(PKG_FTPIO_CNT))?getenv(PKG_FTPIO_CNT):"");
|
||
|
||
mkdir(tmpdir, 0755);
|
||
|
||
/* yes, this is gross, but needed for borken ftp(1) */
|
||
snprintf(cmd, sizeof(cmd), "get xpmroot-1.01.tgz \"| ( cd %s ; gunzip 2>/dev/null | tar -vvx -f - )\"\n", tmpdir);
|
||
rc = ftp_cmd(cmd, "\n(226|550).*\n");
|
||
if (rc != 226) {
|
||
warnx("Cannot fetch file (%d != 226)!", rc);
|
||
return -1;
|
||
}
|
||
}
|
||
|
||
/* check if one more file(s) exist */
|
||
if (0) {
|
||
char buf[FILENAME_MAX];
|
||
snprintf(buf,FILENAME_MAX, "ls %s /tmp/xxx\n", pkg);
|
||
rc = ftp_cmd(buf, "\n(226|550).*\n"); /* catch errors */
|
||
if (rc != 226) {
|
||
if (Verbose)
|
||
warnx("ls failed!");
|
||
return -1;
|
||
}
|
||
|
||
/* Sync - don't remove */
|
||
rc = ftp_cmd("cd .\n", "\n(550|250).*\n");
|
||
if (rc != 250) {
|
||
warnx("chdir failed!");
|
||
return -1;
|
||
}
|
||
|
||
if (access("/tmp/xxx", R_OK)==0) {
|
||
system("cat /tmp/xxx");
|
||
|
||
{
|
||
/* count lines - >0 -> fexists() == true */
|
||
int len, count;
|
||
FILE *f;
|
||
|
||
f=fopen("/tmp/xxx", "r");
|
||
if (f == NULL) {
|
||
warn("fopen");
|
||
return -1;
|
||
}
|
||
count=0;
|
||
while (fgetln(f, &len))
|
||
count++;
|
||
fclose(f);
|
||
|
||
printf("#lines = %d\n", count);
|
||
}
|
||
} else
|
||
printf("NO MATCH\n");
|
||
|
||
unlink("/tmp/xxx");
|
||
}
|
||
|
||
/* for a given wildcard URL, find the best matching pkg */
|
||
/* spawn child - like pkg_add'ing another package */
|
||
/* Here's where the connection caching kicks in */
|
||
#if 0
|
||
if (0) {
|
||
char *s, buf[FILENAME_MAX];
|
||
|
||
if ((s=getenv(PKG_FTPIO_CNT)) && atoi(s)>0){
|
||
snprintf(buf,FILENAME_MAX,"%d", atoi(s)-1);
|
||
setenv(PKG_FTPIO_CNT, buf, 1);
|
||
|
||
snprintf(buf, FILENAME_MAX, "%s \"%s/%s\"", argv0, url, pkg);
|
||
printf("%s>>> %s\n", s, buf);
|
||
system(buf);
|
||
}
|
||
}
|
||
#endif
|
||
|
||
return 0;
|
||
|
||
}
|
||
#endif
|
||
|
||
|
||
#ifdef STANDALONE
|
||
static void
|
||
usage(void)
|
||
{
|
||
errx(1, "Usage: foo [-v] ftp://-pattern\n");
|
||
}
|
||
|
||
|
||
int
|
||
main(int argc, char *argv[])
|
||
{
|
||
int rc, ch;
|
||
char *argv0 = argv[0];
|
||
|
||
while ((ch = getopt(argc, argv, "v")) != -1) {
|
||
switch (ch) {
|
||
case 'v':
|
||
Verbose=1;
|
||
break;
|
||
default:
|
||
usage();
|
||
}
|
||
}
|
||
argc -= optind;
|
||
argv += optind;
|
||
|
||
if (argc<1)
|
||
usage();
|
||
|
||
while(argv[0] != NULL) {
|
||
char newurl[FILENAME_MAX];
|
||
|
||
printf("Expand %s:\n", argv[0]);
|
||
rc = expandURL(newurl, argv[0]);
|
||
if (rc==-1)
|
||
warnx("Cannot expand %s", argv[0]);
|
||
else
|
||
printf("Expanded URL: %s\n", newurl);
|
||
|
||
/* test out connection caching */
|
||
if (1) {
|
||
char *s, buf[FILENAME_MAX];
|
||
|
||
if ((s=getenv(PKG_FTPIO_CNT)) && atoi(s)>0){
|
||
snprintf(buf,FILENAME_MAX,"%d", atoi(s)-1);
|
||
setenv(PKG_FTPIO_CNT, buf, 1);
|
||
|
||
snprintf(buf, FILENAME_MAX, "%s -v '%s'", argv0, argv[0]);
|
||
printf("%s>>> %s\n", s, buf);
|
||
system(buf);
|
||
}
|
||
}
|
||
|
||
printf("\n\n\n");
|
||
argv++;
|
||
}
|
||
|
||
ftp_stop();
|
||
|
||
return 0;
|
||
}
|
||
#endif /* STANDALONE */
|