From 89ddb19c0a115febfbaaa51e68a1fb2ca879a456 Mon Sep 17 00:00:00 2001
From: PHO <pho@cielonegro.org>
Date: Sat, 27 Dec 2008 23:07:34 +0900
Subject: [PATCH] getprogname(3) wasn't portable enough.

---
 Makefile.am   |  3 ++-
 configure.ac  |  2 ++
 daemon.c      |  3 +++
 getprogname.c | 20 ++++++++++++++++++++
 getprogname.h | 10 ++++++++++
 pidfile.c     |  3 +++
 6 files changed, 40 insertions(+), 1 deletion(-)
 create mode 100644 getprogname.c
 create mode 100644 getprogname.h

diff --git a/Makefile.am b/Makefile.am
index 4ccbe69..0f60bfd 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -4,11 +4,12 @@ sbin_PROGRAMS  = daemon
 
 daemon_SOURCES = \
 	daemon.c \
+	getprogname.h \
 	pidfile.c pidfile.h \
 	flopen.c  flopen.h  \
 	$(NULL)
 
 man8_MANS  = daemon.8
-EXTRA_DIST = $(man8_MANS)
+EXTRA_DIST = $(man8_MANS) getprogname.c
 
 AM_CFLAGS = -Wall
diff --git a/configure.ac b/configure.ac
index bb8b380..f5646c5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -27,6 +27,8 @@ AC_TYPE_SSIZE_T
 AC_CHECK_FUNCS([ftruncate])
 AC_CHECK_FUNCS([strtol])
 AC_CHECK_FUNCS([strerror])
+AC_CHECK_FUNCS([strrchr])
+AC_REPLACE_FUNCS([getprogname])
 AC_FUNC_MALLOC
 
 AC_CONFIG_FILES([
diff --git a/daemon.c b/daemon.c
index 5b769dd..35b7269 100644
--- a/daemon.c
+++ b/daemon.c
@@ -30,6 +30,7 @@
 
 #include "config.h"
 #include "pidfile.h"
+#include "getprogname.h"
 
 #include <sys/param.h>
 
@@ -51,6 +52,8 @@ main(int argc, char *argv[])
 	const char *pidfile, *user;
 	pid_t otherpid;
 
+    setprogname(argv[0]);
+
 	nochdir = noclose = 1;
 	pidfile = user = NULL;
 	while ((ch = getopt(argc, argv, "-cfp:u:")) != -1) {
diff --git a/getprogname.c b/getprogname.c
new file mode 100644
index 0000000..bff83e4
--- /dev/null
+++ b/getprogname.c
@@ -0,0 +1,20 @@
+#include "getprogname.h"
+#include <string.h>
+
+static const char* _progname = NULL;
+
+const char* getprogname(void) {
+    return _progname;
+}
+
+void setprogname(const char* progname) {
+    const char* last_backslash;
+
+    last_backslash = strrchr(progname, '/');
+    if (last_backslash) {
+        _progname = last_backslash + 1;
+    }
+    else {
+        _progname = progname;
+    }
+}
diff --git a/getprogname.h b/getprogname.h
new file mode 100644
index 0000000..87f1a8d
--- /dev/null
+++ b/getprogname.h
@@ -0,0 +1,10 @@
+#ifndef GETPROGNAME_H_INCLUDED
+#define GETPROGNAME_H_INCLUDED
+#include "config.h"
+
+#if !defined(HAVE_GETPROGNAME)
+const char* getprogname(void);
+void setprogname(const char* progname);
+#endif
+
+#endif
diff --git a/pidfile.c b/pidfile.c
index b699efb..58790d3 100644
--- a/pidfile.c
+++ b/pidfile.c
@@ -24,8 +24,11 @@
  * SUCH DAMAGE.
  */
 
+#include "config.h"
+
 #include "pidfile.h"
 #include "flopen.h"
+#include "getprogname.h"
 
 #include <sys/cdefs.h>
 #include <sys/file.h>
-- 
2.40.0