[PATCH] maildir++ for qmail-local and qmail-pop3d

Patch to make qmail-local and qmail-pop3d compatible with the maildir++ quota
system that is used by vpopmail and courier-imap

qmail-maildir++

1 files changed, 133 insertions, 0 deletions

diff --git a/maildiropen.c b/maildiropen.c
new file mode 100644
index 0000000..bcaadd4
--- /dev/null
+++ b/maildiropen.c
@@ -0,0 +1,133 @@
+/*
+** Copyright 2000 Double Precision, Inc.
+** See COPYING for distribution information.
+*/
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include        <sys/types.h>
+#include        <sys/stat.h>
+#include        <string.h>
+#include        <stdlib.h>
+#include        <time.h>
+#if     HAVE_UNISTD_H
+#include        <unistd.h>
+#endif
+#include        <stdio.h>
+#include        <ctype.h>
+#include        <errno.h>
+#include        <fcntl.h>
+
+#include        "maildirmisc.h"
+
+static const char rcsid[]="$Id: maildiropen.c,v 1.7 2000/12/10 04:43:44 mrsam Exp $";
+
+char *maildir_getlink(const char *filename)
+{
+#if     HAVE_READLINK
+size_t  bufsiz;
+char    *buf;
+
+        bufsiz=0;
+        buf=0;
+
+        for (;;)
+        {
+        int     n;
+
+                if (buf)        free(buf);
+                bufsiz += 256;
+                if ((buf=malloc(bufsiz)) == 0)
+                {
+                        perror("malloc");
+                        return (0);
+                }
+                if ((n=readlink(filename, buf, bufsiz)) < 0)
+                {
+                        free(buf);
+                        return (0);
+                }
+                if (n < bufsiz)
+                {
+                        buf[n]=0;
+                        break;
+                }
+        }
+        return (buf);
+#else
+        return (0);
+#endif
+}
+
+int maildir_semisafeopen(const char *path, int mode, int perm)
+{
+
+#if     HAVE_READLINK
+
+char    *l=maildir_getlink(path);
+
+        if (l)
+        {
+        int     f;
+
+                if (*l != '/')
+                {
+                char    *q=malloc(strlen(path)+strlen(l)+2);
+                char    *s;
+
+                        if (!q)
+                        {
+                                free(l);
+                                return (-1);
+                        }
+
+                        strcpy(q, path);
+                        if ((s=strchr(q, '/')) != 0)
+                                s[1]=0;
+                        else    *q=0;
+                        strcat(q, l);
+                        free(l);
+                        l=q;
+                }
+
+                f=maildir_safeopen(l, mode, perm);
+
+                free(l);
+                return (f);
+        }
+#endif
+
+        return (maildir_safeopen(path, mode, perm));
+}
+                
+int maildir_safeopen(const char *path, int mode, int perm)
+{
+struct  stat    stat1, stat2;
+
+int     fd=open(path, mode
+#ifdef  O_NONBLOCK
+                        | O_NONBLOCK
+#else
+                        | O_NDELAY
+#endif
+                                , perm);
+
+        if (fd < 0)     return (fd);
+        if (fcntl(fd, F_SETFL, (mode & O_APPEND)) || fstat(fd, &stat1)
+            || lstat(path, &stat2))
+        {
+                close(fd);
+                return (-1);
+        }
+
+        if (stat1.st_dev != stat2.st_dev || stat1.st_ino != stat2.st_ino)
+        {
+                close(fd);
+                errno=ENOENT;
+                return (-1);
+        }
+
+        return (fd);
+}