1 files changed, 156 insertions, 0 deletions
diff --git a/src/maildir2mbox.c b/src/maildir2mbox.c
new file mode 100644
index 0000000..ba187e7
--- /dev/null
+++ b/src/maildir2mbox.c
@@ -0,0 +1,156 @@
+#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);
+}