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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "util.h"
static char *line;
static size_t linesize;
static char host[256], *user, dtimebuf[32], mtimebuf[32];
static int usecontent = 0; /* env variable: $SFEED_MBOX_CONTENT */
static unsigned long long
djb2(unsigned char *s, unsigned long long hash)
{
int c;
while ((c = *s++))
hash = ((hash << 5) + hash) + c; /* hash * 33 + c */
return hash;
}
/* Unescape / decode fields printed by string_print_encoded()
* "\\" to "\", "\t", to TAB, "\n" to newline. Unrecognised escape sequences
* are ignored: "\z" etc. Mangle "From " in mboxrd style (always prefix >). */
static void
printcontent(const char *s, FILE *fp)
{
escapefrom:
for (; *s == '>'; s++)
putc('>', fp);
/* escape "From ", mboxrd-style. */
if (!strncmp(s, "From ", 5))
putc('>', fp);
for (; *s; s++) {
switch (*s) {
case '\\':
s++;
switch (*s) {
case 'n':
putc('\n', fp);
s++;
goto escapefrom;
case '\\': putc('\\', fp); break;
case 't': putc('\t', fp); break;
}
break;
default:
putc(*s, fp); break;
}
}
}
static void
printfeed(FILE *fp, const char *feedname)
{
char *fields[FieldLast], timebuf[32];
struct tm parsedtm, *tm;
time_t parsedtime;
unsigned long long hash;
ssize_t linelen;
int ishtml;
while ((linelen = getline(&line, &linesize, fp)) > 0 &&
!ferror(stdout)) {
if (line[linelen - 1] == '\n')
line[--linelen] = '\0';
hash = djb2((unsigned char *)line, 5381ULL);
parseline(line, fields);
/* mbox + mail header */
printf("From MAILER-DAEMON %s\n", mtimebuf);
parsedtime = 0;
if (!strtotime(fields[FieldUnixTimestamp], &parsedtime) &&
(tm = gmtime_r(&parsedtime, &parsedtm)) &&
strftime(timebuf, sizeof(timebuf), "%a, %d %b %Y %H:%M:%S +0000", tm)) {
printf("Date: %s\n", timebuf);
} else {
printf("Date: %s\n", dtimebuf); /* invalid/missing: use current time */
}
printf("From: %s <sfeed@>\n", fields[FieldAuthor][0] ? fields[FieldAuthor] : feedname);
printf("To: %s <%s@%s>\n", user, user, host);
printf("Subject: %s\n", fields[FieldTitle]);
printf("Message-ID: <%s%s%llu@%s>\n",
fields[FieldUnixTimestamp],
fields[FieldUnixTimestamp][0] ? "." : "",
hash, feedname);
ishtml = usecontent && !strcmp(fields[FieldContentType], "html");
if (ishtml)
fputs("Content-Type: text/html; charset=\"utf-8\"\n", stdout);
else
fputs("Content-Type: text/plain; charset=\"utf-8\"\n", stdout);
fputs("Content-Transfer-Encoding: binary\n", stdout);
printf("X-Feedname: %s\n", feedname);
fputs("\n", stdout);
if (ishtml) {
fputs("<p>\n", stdout);
if (fields[FieldLink][0]) {
fputs("Link: <a href=\"", stdout);
xmlencode(fields[FieldLink], stdout);
fputs("\">", stdout);
xmlencode(fields[FieldLink], stdout);
fputs("</a><br/>\n", stdout);
}
if (fields[FieldEnclosure][0]) {
fputs("Enclosure: <a href=\"", stdout);
xmlencode(fields[FieldEnclosure], stdout);
fputs("\">", stdout);
xmlencode(fields[FieldEnclosure], stdout);
fputs("</a><br/>\n", stdout);
}
fputs("</p>\n", stdout);
} else {
if (fields[FieldLink][0])
printf("Link: %s\n", fields[FieldLink]);
if (fields[FieldEnclosure][0])
printf("Enclosure: %s\n", fields[FieldEnclosure]);
}
if (usecontent) {
fputs("\n", stdout);
if (ishtml && fields[FieldLink][0]) {
fputs("<base href=\"", stdout);
xmlencode(fields[FieldLink], stdout);
fputs("\"/>\n", stdout);
}
printcontent(fields[FieldContent], stdout);
}
fputs("\n\n", stdout);
}
}
int
main(int argc, char *argv[])
{
struct tm tmnow;
time_t now;
FILE *fp;
char *name, *tmp;
int i;
if (pledge(argc == 1 ? "stdio" : "stdio rpath", NULL) == -1)
err(1, "pledge");
if ((tmp = getenv("SFEED_MBOX_CONTENT")))
usecontent = !strcmp(tmp, "1");
if (!(user = getenv("USER")))
user = "you";
if (gethostname(host, sizeof(host)) == -1)
err(1, "gethostname");
if ((now = time(NULL)) == (time_t)-1)
errx(1, "time");
if (!gmtime_r(&now, &tmnow))
err(1, "gmtime_r: can't get current time");
if (!strftime(mtimebuf, sizeof(mtimebuf), "%a %b %d %H:%M:%S %Y", &tmnow))
errx(1, "strftime: can't format current time");
if (!strftime(dtimebuf, sizeof(dtimebuf), "%a, %d %b %Y %H:%M:%S +0000", &tmnow))
errx(1, "strftime: can't format current time");
if (argc == 1) {
printfeed(stdin, "");
checkfileerror(stdin, "<stdin>", 'r');
} else {
for (i = 1; i < argc; i++) {
if (!(fp = fopen(argv[i], "r")))
err(1, "fopen: %s", argv[i]);
name = ((name = strrchr(argv[i], '/'))) ? name + 1 : argv[i];
printfeed(fp, name);
checkfileerror(fp, argv[i], 'r');
fclose(fp);
}
}
checkfileerror(stdout, "<stdout>", 'w');
return 0;
}
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