Add umask support to cronolog.

Patch-by: Mike Doty <kingtaco@gentoo.org>
Signed-off-By: Robin H. Johnson <robbat2@gentoo.org>

--- a/src/cronolog.c.orig	2010-01-22 16:49:41.000000000 -0800
+++ b/src/cronolog.c	2010-01-22 17:31:50.000000000 -0800
@@ -106,7 +106,8 @@
 
 #ifndef _WIN32
 #define SETUGID_USAGE	"   -u USER,   --set-uid=USER  change to USER before doing anything (name or UID)\n" \
-			"   -g GROUP,  --set-gid=GROUP change to GROUP before doing anything (name or GID)\n"
+			"   -g GROUP,  --set-gid=GROUP change to GROUP before doing anything (name or GID)\n" \
+			"   -U OCTAL,  --umask=OCTAL   sets umask of file/directory creation\n"
 #else
 #define SETUGID_USAGE	""
 #endif
@@ -134,7 +135,7 @@
 /* Definition of the short and long program options */
 
 #ifndef _WIN32
-char          *short_options = "ad:eop:s:z:H:P:S:l:hVx:u:g:";
+char          *short_options = "ad:eop:s:z:H:P:S:l:hVx:u:g:U:";
 #else
 char          *short_options = "ad:eop:s:z:H:P:S:l:hVx:";
 #endif        
@@ -157,10 +158,16 @@
     { "once-only", 	no_argument,       	NULL, 'o' },
     { "help",      	no_argument,       	NULL, 'h' },
     { "version",   	no_argument,       	NULL, 'V' },
+    { "umask",     	required_argument, 	NULL, 'U' },
     { NULL,		0,			NULL, 0 }
 };
 #endif
 
+#ifndef _WIN32
+static mode_t saved_umask = 0;
+static mode_t new_umask = 0;
+#endif
+
 /* Main function.
  */
 int
@@ -193,6 +200,11 @@
     int 	log_fd = -1;
 
 #ifndef _WIN32
+    new_umask=umask(0);
+    umask(new_umask);
+#endif
+
+#ifndef _WIN32
     while ((ch = getopt_long(argc, argv, short_options, long_options, NULL)) != EOF)
 #else
     while ((ch = getopt(argc, argv, short_options)) != EOF)
@@ -267,6 +279,9 @@
 	    new_gid = parse_gid(optarg, argv[0]);
 	    change_gid = 1;
 	    break;
+	case 'U':
+	  new_umask = (mode_t)strtol(optarg, NULL, 8);
+	  break;
 #endif
 	case 'o':
 	    periodicity = ONCE_ONLY;
@@ -443,6 +458,9 @@
 	   timestamp(*pnext_period), *pnext_period,
 	   *pnext_period - time_now));
     
+#ifndef _WIN32
+    saved_umask=umask(new_umask);
+#endif
     log_fd = open(pfilename, O_WRONLY|O_CREAT|O_APPEND|O_LARGEFILE, FILE_MODE);
     
 #ifndef DONT_CREATE_SUBDIRS
@@ -459,6 +477,10 @@
 	exit(2);
     }
 
+#ifndef _WIN32
+    umask(saved_umask);
+#endif
+
     if (linkname)
     {
 	create_link(pfilename, linkname, linktype, prevlinkname);