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#include <unistd.h>
#include <sys/stat.h>
#include "env.h"
#include "genalloc.h"
#include "stralloc.h"
#include "buffer.h"
#include "getln.h"
#include "logmsg.h"
#include "open.h"
#include "lock.h"
#include "gfrom.h"
#include "str.h"
#include "exit.h"
#include "myctime.h"
#include "maildir.h"
#include "prioq.h"
char *mbox;
char *mboxtmp;
int rename(const char *,const char *); // stdio.h
stralloc filenames = {0};
prioq pq = {0};
prioq pq2 = {0};
stralloc line = {0};
stralloc ufline = {0};
char inbuf[BUFFER_INSIZE];
char outbuf[BUFFER_OUTSIZE];
#define WHO "maildir2mbox"
void die_nomem() { logmsg(WHO,111,FATAL,"out of memory"); }
int main()
{
buffer bi;
buffer bo;
struct prioq_elt pe;
int fdoldmbox;
int fdnewmbox;
int fd;
int match;
int fdlock;
umask(077);
mbox = env_get("MAIL");
if (!mbox) logmsg(WHO,111,FATAL,"MAIL not set");
mboxtmp = env_get("MAILTMP");
if (!mboxtmp) logmsg(WHO,111,FATAL,"MAILTMP not set");
if (maildir_chdir() == -1)
logmsg(WHO,110,FATAL,"Can't changet maildir");
maildir_clean(&filenames);
if (maildir_scan(&pq,&filenames,1,1) == -1)
logmsg(WHO,112,FATAL,"Can't read maidir");
if (!prioq_min(&pq,&pe)) _exit(0); /* nothing new */
fdlock = open_append(mbox);
if (fdlock == -1)
logmsg(WHO,111,FATAL,B("unable to lock: ",mbox));
if (lock_ex(fdlock) == -1)
logmsg(WHO,111,FATAL,B("unable to lock: ",mbox));
fdoldmbox = open_read(mbox);
if (fdoldmbox == -1)
logmsg(WHO,112,FATAL,B("unable to read: ",mbox));
fdnewmbox = open_trunc(mboxtmp);
if (fdnewmbox == -1)
logmsg(WHO,112,FATAL,B("unable to create: ",mboxtmp));
buffer_init(&bi,read,fdoldmbox,inbuf,sizeof(inbuf));
buffer_init(&bo,write,fdnewmbox,outbuf,sizeof(outbuf));
switch (buffer_copy(&bo,&bi)) {
case -2: logmsg(WHO,112,FATAL,B("unable to read: ",mbox));
case -3: logmsg(WHO,112,FATAL,B("unable to write to: ",mboxtmp));
}
while (prioq_min(&pq,&pe)) {
prioq_delmin(&pq);
if (!prioq_insert(&pq2,&pe)) die_nomem();
fd = open_read(filenames.s + pe.id);
if (fd == -1)
logmsg(WHO,112,FATAL,B("unable to read: $MAILDIR/",filenames.s + pe.id));
buffer_init(&bi,read,fd,inbuf,sizeof(inbuf));
if (getln(&bi,&line,&match,'\n') != 0)
logmsg(WHO,112,FATAL,B("unable to read: $MAILDIR/",filenames.s + pe.id));
if (!stralloc_copys(&ufline,"From XXX ")) die_nomem();
if (match)
if (stralloc_starts(&line,"Return-Path: <")) {
if (line.s[14] == '>') {
if (!stralloc_copys(&ufline,"From MAILER-DAEMON ")) die_nomem();
} else {
int i;
if (!stralloc_ready(&ufline,line.len)) die_nomem();
if (!stralloc_copys(&ufline,"From ")) die_nomem();
for (i = 14;i < line.len - 2;++i)
if ((line.s[i] == ' ') || (line.s[i] == '\t'))
ufline.s[ufline.len++] = '-';
else
ufline.s[ufline.len++] = line.s[i];
if (!stralloc_cats(&ufline," ")) die_nomem();
}
}
if (!stralloc_cats(&ufline,myctime(pe.dt))) die_nomem();
if (buffer_put(&bo,ufline.s,ufline.len) == -1)
logmsg(WHO,112,FATAL,B("unable to write to: ",mboxtmp));
while (match && line.len) {
if (gfrom(line.s,line.len))
if (buffer_puts(&bo,">") == -1)
logmsg(WHO,112,FATAL,B("unable to write to: ",mboxtmp));
if (buffer_put(&bo,line.s,line.len) == -1)
logmsg(WHO,112,FATAL,B("unable to write to: ",mboxtmp));
if (!match) {
if (buffer_puts(&bo,"\n") == -1)
logmsg(WHO,112,FATAL,B("unable to write to: ",mboxtmp));
break;
}
if (getln(&bi,&line,&match,'\n') != 0)
logmsg(WHO,112,FATAL,B("unable to read: $MAILDIR/",filenames.s + pe.id));
}
if (buffer_puts(&bo,"\n"))
logmsg(WHO,112,FATAL,B("unable to write to: ",mboxtmp));
close(fd);
}
if (buffer_flush(&bo) == -1)
logmsg(WHO,112,FATAL,B("unable to write to: ",mboxtmp));
if (fsync(fdnewmbox) == -1)
logmsg(WHO,112,FATAL,B("unable to write to: ",mboxtmp));
if (close(fdnewmbox) == -1) /* NFS dorks */
logmsg(WHO,112,FATAL,B("unable to write to: ",mboxtmp));
if (rename(mboxtmp,mbox) == -1)
logmsg(WHO,112,FATAL,B("unable to move ",mboxtmp," to: ",mbox));
while (prioq_min(&pq2,&pe)) {
prioq_delmin(&pq2);
if (unlink(filenames.s + pe.id) == -1)
logmsg(WHO,0,WARN,B("$MAILDIR/",filenames.s + pe.id," will be delivered twice; unable to unlink"));
}
_exit(0);
}
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