mirror of
https://github.com/leahneukirchen/mblaze
synced 2024-11-03 15:40:32 +00:00
ca8cef1660
As a side benefit, all callers of blaze822_home_file need only pass the filename, so the base directory is set in only one place.
745 lines
15 KiB
C
745 lines
15 KiB
C
#include <sys/stat.h>
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#include <sys/types.h>
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#include <ctype.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <fnmatch.h>
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#include <iconv.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <strings.h>
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#include <time.h>
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#include <unistd.h>
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#include "blaze822.h"
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static int rflag;
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static int Rflag;
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static int qflag;
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static int Hflag;
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static int Lflag;
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static int tflag;
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static int nflag;
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static char defaulthflags[] = "from:subject:to:cc:date:";
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static char *hflag = defaulthflags;
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static char *xflag;
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static char *Oflag;
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struct message *filters;
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static int mimecount;
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static char defaultAflags[] = "text/plain:text/html";
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static char *Aflag = defaultAflags;
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void
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printhdr(char *hdr)
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{
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int uc = 1;
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while (*hdr && *hdr != ':') {
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putc(uc ? toupper(*hdr) : *hdr, stdout);
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uc = (*hdr == '-');
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hdr++;
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}
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if (*hdr)
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printf("%s\n", hdr);
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}
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int
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print_ascii(char *body, size_t bodylen)
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{
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if (!memchr(body, '\r', bodylen))
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return fwrite(body, 1, bodylen, stdout);
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// crlf normalization required
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size_t i;
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for (i = 0; i < bodylen; i++) {
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if (body[i] == '\r') {
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if (!(i+1 < bodylen && body[i+1] == '\n'))
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putc_unlocked('\n', stdout);
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continue;
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}
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putc_unlocked(body[i], stdout);
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}
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return bodylen;
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}
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void
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print_u8recode(char *body, size_t bodylen, char *srcenc)
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{
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iconv_t ic;
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ic = iconv_open("UTF-8", srcenc);
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if (ic == (iconv_t)-1) {
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printf("unsupported encoding: %s\n", srcenc);
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return;
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}
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char final_char = 0;
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char buf[4096];
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while (bodylen > 0) {
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char *bufptr = buf;
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size_t buflen = sizeof buf;
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size_t r = iconv(ic, &body, &bodylen, &bufptr, &buflen);
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if (bufptr != buf) {
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print_ascii(buf, bufptr-buf);
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final_char = bufptr[-1];
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}
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if (r != (size_t)-1) { // done, flush iconv
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bufptr = buf;
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buflen = sizeof buf;
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r = iconv(ic, 0, 0, &bufptr, &buflen);
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if (bufptr != buf) {
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print_ascii(buf, bufptr-buf);
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final_char = bufptr[-1];
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}
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if (r != (size_t)-1)
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break;
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}
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if (r == (size_t)-1 && errno != E2BIG) {
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perror("iconv");
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break;
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}
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}
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if (final_char != '\n')
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printf("\n");
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iconv_close(ic);
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}
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char *
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mimetype(char *ct)
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{
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char *s;
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if (!ct)
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return 0;
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for (s = ct; *s && *s != ';' && *s != ' ' && *s != '\t'; s++)
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;
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return strndup(ct, s-ct);
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}
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char *
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tlmimetype(char *ct)
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{
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char *s;
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if (!ct)
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return 0;
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for (s = ct; *s && *s != ';' && *s != ' ' && *s != '\t' && *s != '/'; s++)
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;
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return strndup(ct, s-ct);
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}
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char *
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mime_filename(struct message *msg)
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{
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char *filename = 0, *fn, *fne, *v;
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if ((v = blaze822_hdr(msg, "content-disposition"))) {
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if (blaze822_mime_parameter(v, "filename", &fn, &fne))
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filename = strndup(fn, fne-fn);
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} else if ((v = blaze822_hdr(msg, "content-type"))) {
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if (blaze822_mime_parameter(v, "name", &fn, &fne))
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filename = strndup(fn, fne-fn);
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}
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return filename;
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}
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static void choose_alternative(struct message *msg, int depth);
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blaze822_mime_action
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render_mime(int depth, struct message *msg, char *body, size_t bodylen)
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{
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char *ct = blaze822_hdr(msg, "content-type");
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if (!ct)
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ct = "text/x-unknown";
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char *mt = mimetype(ct);
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char *tlmt = tlmimetype(ct);
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char *filename = mime_filename(msg);
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mimecount++;
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int i;
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for (i = 0; i < depth+1; i++)
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printf("--- ");
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printf("%d: %s size=%zd", mimecount, mt, bodylen);
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if (filename) {
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printf(" name=\"%s\"", filename);
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free(filename);
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}
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char *cmd;
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blaze822_mime_action r = MIME_CONTINUE;
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if (filters &&
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((cmd = blaze822_chdr(filters, mt)) ||
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(cmd = blaze822_chdr(filters, tlmt)))) {
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char *charset = 0, *cs, *cse;
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if (blaze822_mime_parameter(ct, "charset", &cs, &cse)) {
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charset = strndup(cs, cse-cs);
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printf(" charset=\"%s\"", charset);
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setenv("PIPE_CHARSET", charset, 1);
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free(charset);
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}
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setenv("PIPE_CONTENTTYPE", ct, 1);
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char *output;
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size_t outlen;
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int e = filter(body, bodylen, cmd, &output, &outlen);
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if (e == 0) { // replace output
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printf(" render=\"%s\" ---\n", cmd);
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print_ascii(output, outlen);
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if (output[outlen-1] != '\n')
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putchar('\n');
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} else if (e == 63) { // skip filter
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free(output);
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goto nofilter;
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} else if (e == 64) { // decode output again
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printf(" filter=\"%s\" ---\n", cmd);
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struct message *imsg = blaze822_mem(output, outlen);
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if (imsg)
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blaze822_walk_mime(imsg, depth+1, render_mime);
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blaze822_free(imsg);
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} else if (e >= 65 && e <= 80) { // choose N-64th part
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struct message *imsg = 0;
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int n = e - 64;
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printf(" selector=\"%s\" part=%d ---\n", cmd, n);
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while (blaze822_multipart(msg, &imsg)) {
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if (--n == 0)
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blaze822_walk_mime(imsg, depth+1, render_mime);
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}
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blaze822_free(imsg);
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} else {
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printf(" filter=\"%s\" FAILED status=%d", cmd, e);
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free(output);
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goto nofilter;
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}
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free(output);
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r = MIME_PRUNE;
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} else {
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nofilter:
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printf(" ---\n");
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if (strncmp(ct, "text/", 5) == 0) {
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char *charset = 0, *cs, *cse;
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if (blaze822_mime_parameter(ct, "charset", &cs, &cse))
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charset = strndup(cs, cse-cs);
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if (!charset ||
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strcasecmp(charset, "utf-8") == 0 ||
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strcasecmp(charset, "utf8") == 0 ||
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strcasecmp(charset, "us-ascii") == 0) {
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print_ascii(body, bodylen);
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if (body[bodylen-1] != '\n')
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putchar('\n');
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} else {
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print_u8recode(body, bodylen, charset);
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}
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free(charset);
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} else if (strncmp(ct, "message/rfc822", 14) == 0) {
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struct message *imsg = blaze822_mem(body, bodylen);
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char *h = 0;
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while (imsg && (h = blaze822_next_header(imsg, h))) {
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char d[4096];
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blaze822_decode_rfc2047(d, h, sizeof d, "UTF-8");
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printhdr(d);
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}
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printf("\n");
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} else if (strncmp(ct, "multipart/alternative", 21) == 0) {
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choose_alternative(msg, depth);
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r = MIME_PRUNE;
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} else if (strncmp(ct, "multipart/", 10) == 0) {
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; // default blaze822_mime_walk action
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} else {
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printf("no filter or default handler\n");
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}
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}
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free(mt);
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free(tlmt);
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return r;
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}
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static void
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choose_alternative(struct message *msg, int depth)
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{
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int n = 1;
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int m = 0;
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char *p = Aflag + strlen(Aflag);
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struct message *imsg = 0;
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while (blaze822_multipart(msg, &imsg)) {
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m++;
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char *ict = blaze822_hdr(imsg, "content-type");
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if (!ict)
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ict = "text/x-unknown";
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char *imt = mimetype(ict);
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char *s = strstr(Aflag, imt);
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if (s && s < p &&
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(s[strlen(imt)] == 0 || s[strlen(imt)] == ':')) {
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p = s;
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n = m;
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}
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free(imt);
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}
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blaze822_free(imsg);
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imsg = 0;
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while (blaze822_multipart(msg, &imsg))
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if (--n == 0)
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blaze822_walk_mime(imsg, depth+1, render_mime);
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blaze822_free(imsg);
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}
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blaze822_mime_action
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reply_mime(int depth, struct message *msg, char *body, size_t bodylen)
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{
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(void) depth;
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char *ct = blaze822_hdr(msg, "content-type");
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char *mt = mimetype(ct);
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char *tlmt = tlmimetype(ct);
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if (!ct || strncmp(ct, "text/plain", 10) == 0) {
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char *charset = 0, *cs, *cse;
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if (blaze822_mime_parameter(ct, "charset", &cs, &cse))
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charset = strndup(cs, cse-cs);
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if (!charset ||
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strcasecmp(charset, "utf-8") == 0 ||
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strcasecmp(charset, "utf8") == 0 ||
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strcasecmp(charset, "us-ascii") == 0)
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print_ascii(body, bodylen);
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else
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print_u8recode(body, bodylen, charset);
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free(charset);
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}
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free(mt);
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free(tlmt);
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return MIME_CONTINUE;
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}
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blaze822_mime_action
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list_mime(int depth, struct message *msg, char *body, size_t bodylen)
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{
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(void) body;
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char *ct = blaze822_hdr(msg, "content-type");
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if (!ct)
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ct = "text/x-unknown";
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char *mt = mimetype(ct);
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char *filename = mime_filename(msg);
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printf(" %*.s%d: %s size=%zd", depth*2, "", ++mimecount, mt, bodylen);
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if (filename) {
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printf(" name=\"%s\"", filename);
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free(filename);
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}
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printf("\n");
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return MIME_CONTINUE;
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}
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void
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list(char *file)
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{
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struct message *msg = blaze822_file(file);
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if (!msg)
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return;
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mimecount = 0;
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printf("%s\n", file);
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blaze822_walk_mime(msg, 0, list_mime);
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}
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void
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reply(char *file)
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{
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struct message *msg = blaze822_file(file);
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if (!msg)
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return;
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blaze822_walk_mime(msg, 0, reply_mime);
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}
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static int extract_argc;
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static char **extract_argv;
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static int extract_stdout;
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static const char *
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basenam(const char *s)
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{
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char *r = strrchr(s, '/');
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return r ? r + 1 : s;
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}
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static int
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writefile(char *name, char *buf, ssize_t len)
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{
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int fd = open(basenam(name), O_CREAT | O_EXCL | O_WRONLY, 0666);
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if (fd == -1) {
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perror("open");
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return -1;
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}
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ssize_t wr = 0, n;
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do {
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if ((n = write(fd, buf + wr, len - wr)) == -1) {
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if (errno == EINTR) {
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continue;
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} else {
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perror("write");
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return -1;
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}
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}
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wr += n;
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} while (wr < len);
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close(fd);
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return 0;
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}
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blaze822_mime_action
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extract_mime(int depth, struct message *msg, char *body, size_t bodylen)
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{
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(void) depth;
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char *filename = mime_filename(msg);
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mimecount++;
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if (extract_argc == 0) {
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if (extract_stdout) { // output all parts
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fwrite(body, 1, bodylen, stdout);
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} else { // extract all named attachments
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if (filename) {
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printf("%s\n", filename);
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writefile(filename, body, bodylen);
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}
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}
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} else {
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int i;
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for (i = 0; i < extract_argc; i++) {
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char *a = extract_argv[i];
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char *b;
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errno = 0;
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long d = strtol(a, &b, 10);
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if (errno == 0 && !*b && d == mimecount) {
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// extract by id
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if (extract_stdout) {
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if (rflag) {
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fwrite(blaze822_orig_header(msg),
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1, blaze822_headerlen(msg),
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stdout);
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printf("\n\n");
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fwrite(blaze822_body(msg),
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1, blaze822_bodylen(msg),
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stdout);
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} else {
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fwrite(body, 1, bodylen, stdout);
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}
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} else {
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char buf[255];
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char *bufptr;
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if (filename) {
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bufptr = filename;
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} else {
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snprintf(buf, sizeof buf,
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"attachment%d", mimecount);
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bufptr = buf;
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}
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printf("%s\n", bufptr);
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writefile(bufptr, body, bodylen);
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}
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} else if (filename &&
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fnmatch(a, filename, FNM_PATHNAME) == 0) {
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// extract by name
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if (extract_stdout) {
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if (rflag) {
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fwrite(blaze822_orig_header(msg),
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1, blaze822_headerlen(msg),
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stdout);
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printf("\n\n");
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fwrite(blaze822_body(msg),
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1, blaze822_bodylen(msg),
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stdout);
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} else {
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fwrite(body, 1, bodylen, stdout);
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}
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} else {
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printf("%s\n", filename);
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writefile(filename, body, bodylen);
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}
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}
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}
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}
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free(filename);
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return MIME_CONTINUE;
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}
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void
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extract_cb(char *file)
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{
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struct message *msg = blaze822_file(file);
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if (!msg)
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return;
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mimecount = 0;
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blaze822_walk_mime(msg, 0, extract_mime);
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}
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void
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extract(char *file, int argc, char **argv, int use_stdout)
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{
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extract_argc = argc;
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extract_argv = argv;
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extract_stdout = use_stdout;
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blaze822_loop1(file, extract_cb);
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}
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static char *newcur;
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static void
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print_date_header(char *v)
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{
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static time_t now = -1;
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if (now == -1) {
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setenv("TZ", "", 1);
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tzset();
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now = time(0);
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}
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printf("Date: %s", v);
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time_t t = blaze822_date(v);
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if (t == -1) {
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printf(" (invalid)");
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} else {
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printf(" (");
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time_t d = t < now ? now - t : t - now;
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int l;
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if (d > 60*60*24*7*52) l = 'y';
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else if (d > 60*60*24*7) l = 'w';
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else if (d > 60*60*24) l = 'd';
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else if (d > 60*60) l = 'h';
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else if (d > 60) l = 'm';
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else l = 's';
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int p = 3;
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int z;
|
|
switch(l) {
|
|
case 'y':
|
|
z = d / (60*60*24*7*52);
|
|
d = d % (60*60*24*7*52);
|
|
if (z > 0) {
|
|
printf("%d year%s", z, z>1 ? "s" : "");
|
|
if (!--p) break;
|
|
printf(", ");
|
|
}
|
|
case 'w':
|
|
z = d / (60*60*24*7);
|
|
d = d % (60*60*24*7);
|
|
if (z > 0) {
|
|
printf("%d week%s", z, z>1 ? "s" : "");
|
|
if (!--p) break;
|
|
printf(", ");
|
|
}
|
|
case 'd':
|
|
z = d / (60*60*24);
|
|
d = d % (60*60*24);
|
|
if (z > 0) {
|
|
printf("%d day%s", z, z>1 ? "s" : "");
|
|
if (!--p) break;
|
|
printf(", ");
|
|
}
|
|
case 'h':
|
|
z = d / (60*60);
|
|
d = d % (60*60);
|
|
if (z > 0) {
|
|
printf("%d hour%s", z, z>1 ? "s" : "");
|
|
if (!--p) break;
|
|
printf(", ");
|
|
}
|
|
case 'm':
|
|
z = d / (60);
|
|
d = d % (60);
|
|
if (z > 0) {
|
|
printf("%d minute%s", z, z>1 ? "s" : "");
|
|
if (!--p) break;
|
|
printf(", ");
|
|
}
|
|
case 's':
|
|
z = d;
|
|
printf("%d second%s", z, z>1 ? "s" : "");
|
|
}
|
|
|
|
if (t < now)
|
|
printf(" ago)");
|
|
else
|
|
printf(" in the future)");
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
static void
|
|
print_decode_header(char *h, char *v)
|
|
{
|
|
char d[4096];
|
|
blaze822_decode_rfc2047(d, v, sizeof d, "UTF-8");
|
|
printhdr(h);
|
|
printf(": %s\n", d);
|
|
}
|
|
|
|
void
|
|
show(char *file)
|
|
{
|
|
struct message *msg;
|
|
|
|
while (*file == ' ' || *file == '\t')
|
|
file++;
|
|
|
|
if (newcur) {
|
|
printf("\014\n");
|
|
free(newcur);
|
|
}
|
|
newcur = strdup(file);
|
|
|
|
if (qflag && !Hflag)
|
|
msg = blaze822(file);
|
|
else
|
|
msg = blaze822_file(file);
|
|
if (!msg) {
|
|
fprintf(stderr, "mshow: %s: %s\n", file, strerror(errno));
|
|
return;
|
|
}
|
|
|
|
if (Hflag) { // raw headers
|
|
fwrite(blaze822_orig_header(msg), 1, blaze822_headerlen(msg),
|
|
stdout);
|
|
printf("\n");
|
|
} else if (Lflag) { // all headers
|
|
char *h = 0;
|
|
while ((h = blaze822_next_header(msg, h))) {
|
|
char d[4096];
|
|
blaze822_decode_rfc2047(d, h, sizeof d, "UTF-8");
|
|
printhdr(d);
|
|
}
|
|
} else { // selected headers
|
|
char *h = hflag;
|
|
char *v;
|
|
while (*h) {
|
|
char *n = strchr(h, ':');
|
|
if (n)
|
|
*n = 0;
|
|
v = blaze822_chdr(msg, h);
|
|
if (v) {
|
|
if (strcasecmp("date", h) == 0)
|
|
print_date_header(v);
|
|
else
|
|
print_decode_header(h, v);
|
|
}
|
|
if (n) {
|
|
*n = ':';
|
|
h = n + 1;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (qflag) // no body
|
|
goto done;
|
|
|
|
printf("\n");
|
|
|
|
if (rflag || !blaze822_check_mime(msg)) { // raw body
|
|
fwrite(blaze822_body(msg), 1, blaze822_bodylen(msg), stdout);
|
|
goto done;
|
|
}
|
|
|
|
mimecount = 0;
|
|
blaze822_walk_mime(msg, 0, render_mime);
|
|
|
|
done:
|
|
blaze822_free(msg);
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
int c;
|
|
while ((c = getopt(argc, argv, "h:A:qrtHLx:O:Rn")) != -1)
|
|
switch(c) {
|
|
case 'h': hflag = optarg; break;
|
|
case 'A': Aflag = optarg; break;
|
|
case 'q': qflag = 1; break;
|
|
case 'r': rflag = 1; break;
|
|
case 'H': Hflag = 1; break;
|
|
case 'L': Lflag = 1; break;
|
|
case 't': tflag = 1; break;
|
|
case 'x': xflag = optarg; break;
|
|
case 'O': Oflag = optarg; break;
|
|
case 'R': Rflag = 1; break;
|
|
case 'n': nflag = 1; break;
|
|
default:
|
|
fprintf(stderr,
|
|
"Usage: mshow [-h headers] [-A mimetypes] [-qrHL] [msgs...]\n"
|
|
" mshow -x msg parts...\n"
|
|
" mshow -O msg parts...\n"
|
|
" mshow -t msgs...\n"
|
|
" mshow -R msg\n"
|
|
);
|
|
exit(1);
|
|
}
|
|
|
|
if (xflag) { // extract
|
|
extract(xflag, argc-optind, argv+optind, 0);
|
|
} else if (Oflag) { // extract to stdout
|
|
extract(Oflag, argc-optind, argv+optind, 1);
|
|
} else if (tflag) { // list
|
|
if (argc == optind && isatty(0))
|
|
blaze822_loop1(".", list);
|
|
else
|
|
blaze822_loop(argc-optind, argv+optind, list);
|
|
} else if (Rflag) { // render for reply
|
|
blaze822_loop(argc-optind, argv+optind, reply);
|
|
} else { // show
|
|
if (!(qflag || rflag)) {
|
|
char *f = getenv("MAILFILTER");
|
|
if (!f)
|
|
f = blaze822_home_file("filter");
|
|
if (f)
|
|
filters = blaze822(f);
|
|
}
|
|
if (argc == optind && isatty(0))
|
|
blaze822_loop1(".", show);
|
|
else
|
|
blaze822_loop(argc-optind, argv+optind, show);
|
|
if (!nflag) // don't set cur
|
|
blaze822_seq_setcur(newcur);
|
|
}
|
|
|
|
return 0;
|
|
}
|