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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);
- }
-