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/* (C) Copyright 1993,1994 by Carnegie Mellon University |
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* All Rights Reserved. |
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* |
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* Permission to use, copy, modify, distribute, and sell this software |
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* and its documentation for any purpose is hereby granted without |
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* fee, provided that the above copyright notice appear in all copies |
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* and that both that copyright notice and this permission notice |
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* appear in supporting documentation, and that the name of Carnegie |
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* Mellon University not be used in advertising or publicity |
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* pertaining to distribution of the software without specific, |
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* written prior permission. Carnegie Mellon University makes no |
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* representations about the suitability of this software for any |
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* purpose. It is provided "as is" without express or implied |
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* warranty. |
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* |
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* CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO |
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* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY |
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* AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE |
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* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN |
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* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING |
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
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* SOFTWARE. |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <ctype.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <sys/param.h> |
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#include <time.h> |
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#include <netdb.h> |
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#include <fcntl.h> |
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#include <unistd.h> |
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#include "xmalloc.h" |
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#include "common.h" |
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#include "part.h" |
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|
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extern void warn(char *s); |
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|
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#ifndef MAXHOSTNAMELEN |
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#define MAXHOSTNAMELEN 64 |
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#endif |
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|
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#ifndef errno |
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extern int errno; |
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#endif |
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|
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int overwrite_files = 0; |
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int didchat; |
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|
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/* The name of the file we're writing */ |
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static char *output_fname = 0; |
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|
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/* Characters that shouldn't be in filenames */ |
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#define BADCHARS "!$&*()|\'\";<>[]{}?/`\\ \t" |
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|
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/* Generate a message-id */ |
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char *os_genid(void) |
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{ |
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static int pid = 0; |
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static time_t curtime; |
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static char hostname[MAXHOSTNAMELEN+1]; |
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char *result; |
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struct hostent *hp; |
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|
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|
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if (pid == 0) { |
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pid = getpid(); |
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time(&curtime); |
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gethostname(hostname, sizeof(hostname)); |
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|
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/* If we don't have a FQDN, try canonicalizing with gethostbyname */ |
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if (!strchr(hostname, '.')) { |
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hp = gethostbyname(hostname); |
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if (hp) { |
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strcpy(hostname, hp->h_name); |
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} |
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} |
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} |
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|
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result = malloc(25+strlen(hostname)); |
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sprintf(result, "%d.%lu@%s", pid, (unsigned long) curtime++, hostname); |
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return result; |
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} |
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|
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/* Create and return directory for a message-id */ |
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char *os_idtodir(char *id) |
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{ |
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static char buf[4096]; |
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char *p; |
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|
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if (getenv("TMPDIR")) { |
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strcpy(buf, getenv("TMPDIR")); |
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} |
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else { |
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strcpy(buf, "/var/tmp"); |
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} |
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strcat(buf, "/m-prts-"); |
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p = getenv("USER"); |
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if (!p) p = getenv("LOGNAME"); |
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if (!p) p = "x"; |
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strcat(buf, p); |
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|
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(void)mkdir(buf, 0700); |
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|
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p = buf + strlen(buf); |
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*p++ = '/'; |
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while (*id && p < buf+sizeof(buf)-10 ) { |
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if (isprint(*id) && !strchr(BADCHARS, *id)) *p++ = *id; |
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id++; |
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} |
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*p = '\0'; |
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if (mkdir(buf, 0700) == -1 && errno != EEXIST) { |
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perror(buf); |
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return 0; |
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} |
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*p++ = '/'; |
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*p = '\0'; |
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return buf; |
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} |
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|
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/* |
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* We are done with the directory returned by os_idtodir() |
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* Remove it |
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*/ |
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void os_donewithdir(char *dir) |
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{ |
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char *p; |
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|
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/* Remove trailing slash */ |
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p = dir + strlen(dir) - 1; |
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*p = '\0'; |
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|
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rmdir(dir); |
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} |
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|
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FILE *os_createnewfile(char *fname) |
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{ |
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int fd; |
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FILE *ret; |
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|
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#ifdef O_EXCL |
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struct stat statbuf; |
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|
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if ((stat(fname, &statbuf) == 0) && (S_ISCHR(statbuf.st_mode))) { |
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fd=open(fname, O_RDWR); |
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} |
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else { |
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fd=open(fname, O_RDWR|O_CREAT|O_EXCL, 0644); |
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} |
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#else |
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fd=open(fname, O_RDWR|O_CREAT|O_TRUNC, 0644); |
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#endif |
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|
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if (fd == -1) |
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return NULL; |
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|
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ret=fdopen(fd, "w"); |
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return ret; |
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} |
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|
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|
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/* |
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* Create a new file, with suggested filename "fname". |
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* "fname" may have come from an insecure source, so clean it up first. |
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* It may also be null. |
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* "contentType" is passed in for use by systems that have typed filesystems. |
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* "flags" contains a bit pattern describing attributes of the new file. |
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*/ |
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FILE *os_newtypedfile(char *fname, char *contentType, int flags, params contentParams) |
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{ |
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char *p; |
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static int filesuffix=0; |
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char buf[128], *descfname=0; |
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FILE *outfile = 0; |
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|
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if (!fname) fname = ""; |
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|
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/* If absolute path name, chop to tail */ |
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if (*fname == '/') { |
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p = strrchr(fname, '/'); |
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fname = p+1; |
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} |
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|
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/* Get rid of leading ~ or ~/ */ |
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while (*fname == '~' || *fname == '/') fname++; |
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|
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while (!strncmp(fname, "../", 3)) fname += 3; |
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|
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/* Clean out bad characters, create directories along path */ |
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for (p=fname; *p; p++) { |
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if (*p == '/') { |
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if (!strncmp(p, "/../", 4)) { |
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p[1] = p[2] = 'X'; |
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} |
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*p = '\0'; |
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(void) mkdir(fname, 0777); |
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*p = '/'; |
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} |
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else if (!isprint(*p) || strchr(BADCHARS, *p)) *p = 'X'; |
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} |
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|
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if (!fname[0]) { |
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do { |
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if (outfile) fclose(outfile); |
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sprintf(buf, "part%d", ++filesuffix); |
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} while ((outfile = fopen(buf, "r"))); |
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fname = buf; |
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} |
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else if (!overwrite_files && (outfile = fopen(fname, "r"))) { |
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do { |
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fclose(outfile); |
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sprintf(buf, "%s.%d", fname, ++filesuffix); |
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|
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} while ((outfile = fopen(buf, "r"))); |
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fname = buf; |
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} |
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|
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if (overwrite_files) |
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outfile = fopen(fname, "w"); |
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else |
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outfile = os_createnewfile(fname); |
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|
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if (!outfile) { |
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perror(fname); |
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} |
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|
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if (output_fname) free(output_fname); |
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output_fname = strsave(fname); |
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|
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if (strlen(fname) > sizeof(buf)-6) { |
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descfname = xmalloc(strlen(fname)+6); |
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} |
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else { |
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descfname = buf; |
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} |
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strcpy(descfname, fname); |
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|
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p = strchr(descfname, '/'); |
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if (!p) p = descfname; |
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if ((p = strrchr(p, '.'))) *p = '\0'; |
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|
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strcat(descfname, ".desc"); |
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(void) rename(TEMPFILENAME, descfname); |
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if (descfname != buf) free(descfname); |
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|
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fprintf(stdout, "%s (%s)\n", output_fname, contentType); |
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didchat = 1; |
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|
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return outfile; |
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} |
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|
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/* |
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* Close a file opened by os_newTypedFile() |
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*/ |
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void os_closetypedfile(FILE *outfile) |
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{ |
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fclose(outfile); |
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} |
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|
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/* |
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* (Don't) Handle a BinHex'ed file |
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*/ |
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int |
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os_binhex(struct part *inpart, int part, int nparts) |
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{ |
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return 1; |
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} |
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|
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/* |
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* Warn user that the MD5 digest of the last file created by os_newtypedfile() |
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* did not match that supplied in the Content-MD5: header. |
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*/ |
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void os_warnMD5mismatch(void) |
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{ |
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char *warning; |
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|
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warning = xmalloc(strlen(output_fname) + 100); |
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sprintf(warning, "%s was corrupted in transit", |
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output_fname); |
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warn(warning); |
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free(warning); |
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} |
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|
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/* |
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* Report an error (in errno) concerning a filename |
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*/ |
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void os_perror(char *file) |
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{ |
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perror(file); |
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} |
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