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#include "readwrite.h"
#include "prioq.h"
#include "env.h"
#include "stralloc.h"
#include "subfd.h"
#include "substdio.h"
#include "getln.h"
#include "error.h"
#include "open.h"
#include "lock.h"
#include "gfrom.h"
#include "str.h"
#include "exit.h"
#include "myctime.h"
#include "maildir.h"
char *mbox;
char *mboxtmp;
stralloc filenames = {0};
prioq pq = {0};
prioq pq2 = {0};
stralloc line = {0};
stralloc ufline = {0};
char inbuf[SUBSTDIO_INSIZE];
char outbuf[SUBSTDIO_OUTSIZE];
#define FATAL "maildir2mbox: fatal: "
#define WARNING "maildir2mbox: warning: "
void die_nomem() { strerr_die2x(111,FATAL,"out of memory"); }
void main()
{
substdio ssin;
substdio ssout;
struct prioq_elt pe;
int fdoldmbox;
int fdnewmbox;
int fd;
int match;
int fdlock;
umask(077);
mbox = env_get("MAIL");
if (!mbox) strerr_die2x(111,FATAL,"MAIL not set");
mboxtmp = env_get("MAILTMP");
if (!mboxtmp) strerr_die2x(111,FATAL,"MAILTMP not set");
if (maildir_chdir() == -1)
strerr_die1(111,FATAL,&maildir_chdir_err);
maildir_clean(&filenames);
if (maildir_scan(&pq,&filenames,1,1) == -1)
strerr_die1(111,FATAL,&maildir_scan_err);
if (!prioq_min(&pq,&pe)) _exit(0); /* nothing new */
fdlock = open_append(mbox);
if (fdlock == -1)
strerr_die4sys(111,FATAL,"unable to lock ",mbox,": ");
if (lock_ex(fdlock) == -1)
strerr_die4sys(111,FATAL,"unable to lock ",mbox,": ");
fdoldmbox = open_read(mbox);
if (fdoldmbox == -1)
strerr_die4sys(111,FATAL,"unable to read ",mbox,": ");
fdnewmbox = open_trunc(mboxtmp);
if (fdnewmbox == -1)
strerr_die4sys(111,FATAL,"unable to create ",mboxtmp,": ");
substdio_fdbuf(&ssin,read,fdoldmbox,inbuf,sizeof(inbuf));
substdio_fdbuf(&ssout,write,fdnewmbox,outbuf,sizeof(outbuf));
switch(substdio_copy(&ssout,&ssin))
{
case -2: strerr_die4sys(111,FATAL,"unable to read ",mbox,": ");
case -3: strerr_die4sys(111,FATAL,"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)
strerr_die4sys(111,FATAL,"unable to read $MAILDIR/",filenames.s + pe.id,": ");
substdio_fdbuf(&ssin,read,fd,inbuf,sizeof(inbuf));
if (getln(&ssin,&line,&match,'\n') != 0)
strerr_die4sys(111,FATAL,"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 (substdio_put(&ssout,ufline.s,ufline.len) == -1)
strerr_die4sys(111,FATAL,"unable to write to ",mboxtmp,": ");
while (match && line.len)
{
if (gfrom(line.s,line.len))
if (substdio_puts(&ssout,">") == -1)
strerr_die4sys(111,FATAL,"unable to write to ",mboxtmp,": ");
if (substdio_put(&ssout,line.s,line.len) == -1)
strerr_die4sys(111,FATAL,"unable to write to ",mboxtmp,": ");
if (!match)
{
if (substdio_puts(&ssout,"\n") == -1)
strerr_die4sys(111,FATAL,"unable to write to ",mboxtmp,": ");
break;
}
if (getln(&ssin,&line,&match,'\n') != 0)
strerr_die4sys(111,FATAL,"unable to read $MAILDIR/",filenames.s + pe.id,": ");
}
if (substdio_puts(&ssout,"\n"))
strerr_die4sys(111,FATAL,"unable to write to ",mboxtmp,": ");
close(fd);
}
if (substdio_flush(&ssout) == -1)
strerr_die4sys(111,FATAL,"unable to write to ",mboxtmp,": ");
if (fsync(fdnewmbox) == -1)
strerr_die4sys(111,FATAL,"unable to write to ",mboxtmp,": ");
if (close(fdnewmbox) == -1) /* NFS dorks */
strerr_die4sys(111,FATAL,"unable to write to ",mboxtmp,": ");
if (rename(mboxtmp,mbox) == -1)
strerr_die6(111,FATAL,"unable to move ",mboxtmp," to ",mbox,": ",&strerr_sys);
while (prioq_min(&pq2,&pe))
{
prioq_delmin(&pq2);
if (unlink(filenames.s + pe.id) == -1)
strerr_warn4(WARNING,"$MAILDIR/",filenames.s + pe.id," will be delivered twice; unable to unlink: ",&strerr_sys);
}
_exit(0);
}
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