Teach pw(8) about how to use pw/gr API to reduce code duplication

MFC after:	2 months

1 files changed, 68 insertions, 0 deletions

diff --git a/pw/pw_log.c b/pw/pw_log.c
new file mode 100644
index 0000000..f16274f
--- /dev/null
+++ b/pw/pw_log.c
@@ -0,0 +1,68 @@
+/*-
+ * Copyright (C) 1996
+ *	David L. Nugent.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static const char rcsid[] =
+  "$FreeBSD$";
+#endif /* not lint */
+
+#include <fcntl.h>
+
+#include "pw.h"
+
+static FILE    *logfile = NULL;
+
+void
+pw_log(struct userconf * cnf, int mode, int which, char const * fmt,...)
+{
+	if (cnf->logfile && *cnf->logfile) {
+		if (logfile == NULL) {	/* With umask==0 we need to control file access modes on create */
+			int             fd = open(cnf->logfile, O_WRONLY | O_CREAT | O_APPEND, 0600);
+
+			if (fd != -1)
+				logfile = fdopen(fd, "a");
+		}
+		if (logfile != NULL) {
+			va_list         argp;
+			int             l;
+			time_t          now = time(NULL);
+			struct tm      *t = localtime(&now);
+			char            nfmt[256];
+			const char     *name;
+
+			if ((name = getenv("LOGNAME")) == NULL && (name = getenv("USER")) == NULL)
+				name = "unknown";
+			/* ISO 8601 International Standard Date format */
+			strftime(nfmt, sizeof nfmt, "%Y-%m-%d %T ", t);
+			l = strlen(nfmt);
+			sprintf(nfmt + strlen(nfmt), "[%s:%s%s] %s\n", name, Which[which], Modes[mode], fmt);
+			va_start(argp, fmt);
+			vfprintf(logfile, nfmt, argp);
+			va_end(argp);
+			fflush(logfile);
+		}
+	}
+}