From d2aa64df5cac6af4b94c44c723c40f900ccada38 Mon Sep 17 00:00:00 2001
From: Joris Vink <joris@coders.se>
Date: Fri, 29 Mar 2019 16:24:14 +0100
Subject: [PATCH] add kore_proctitle().

manipulates the argv+environ pointers to get a sensible process title
under linux / darwin.
---
 include/kore/kore.h |  2 ++
 src/bsd.c           |  4 +++-
 src/kore.c          | 42 +++++++++++++++++++++++++++++++++++++++---
 src/linux.c         |  4 +---
 src/worker.c        |  4 ++--
 5 files changed, 47 insertions(+), 9 deletions(-)

diff --git a/include/kore/kore.h b/include/kore/kore.h
index 44c3dc8..a7eb460 100644
--- a/include/kore/kore.h
+++ b/include/kore/kore.h
@@ -578,6 +578,8 @@ extern struct kore_pool		nb_pool;
 void		kore_signal(int);
 void		kore_shutdown(void);
 void		kore_signal_setup(void);
+void		kore_proctitle(const char *);
+
 void		kore_worker_reap(void);
 void		kore_worker_init(void);
 void		kore_worker_make_busy(void);
diff --git a/src/bsd.c b/src/bsd.c
index 07b40f2..8c416b4 100644
--- a/src/bsd.c
+++ b/src/bsd.c
@@ -223,7 +223,9 @@ kore_platform_disable_write(int fd)
 void
 kore_platform_proctitle(char *title)
 {
-#ifndef __MACH__
+#ifdef __MACH__
+	kore_proctitle(title);
+#else
 	setproctitle("%s", title);
 #endif
 }
diff --git a/src/kore.c b/src/kore.c
index 3296d3f..23928e3 100644
--- a/src/kore.c
+++ b/src/kore.c
@@ -21,6 +21,7 @@
 #include <sys/socket.h>
 #include <sys/resource.h>
 
+#include <libgen.h>
 #include <fcntl.h>
 #include <stdio.h>
 #include <netdb.h>
@@ -39,6 +40,7 @@
 volatile sig_atomic_t	sig_recv;
 struct listener_head	listeners;
 u_int8_t		nlisteners;
+int			kore_argc = 0;
 pid_t			kore_pid = -1;
 u_int16_t		cpu_count = 1;
 int			foreground = 0;
@@ -47,12 +49,15 @@ int			kore_quiet = 0;
 int			skip_runas = 0;
 int			skip_chroot = 0;
 u_int8_t		worker_count = 0;
+char			**kore_argv = NULL;
+char			*kore_progname = NULL;
 char			*kore_root_path = NULL;
 char			*kore_runas_user = NULL;
 u_int32_t		kore_socket_backlog = 5000;
 char			*kore_pidfile = KORE_PIDFILE_DEFAULT;
 char			*kore_tls_cipher_list = KORE_DEFAULT_CIPHER_LIST;
 
+extern char		**environ;
 extern char		*__progname;
 
 static void	usage(void);
@@ -126,6 +131,8 @@ main(int argc, char *argv[])
 	int				ch, flags;
 
 	flags = 0;
+	kore_argc = argc;
+	kore_argv = argv;
 
 #if !defined(KORE_SINGLE_BINARY)
 	while ((ch = getopt(argc, argv, "c:dfhnqrv")) != -1) {
@@ -167,11 +174,12 @@ main(int argc, char *argv[])
 		}
 	}
 
+	kore_mem_init();
+	kore_progname = kore_strdup(argv[0]);
+
 	argc -= optind;
 	argv += optind;
 
-	kore_mem_init();
-
 #if !defined(KORE_SINGLE_BINARY)
 	if (argc > 0)
 		fatal("did you mean to run `kodev' instead?");
@@ -581,6 +589,34 @@ kore_shutdown(void)
 	fatal("kore_shutdown: called from parent");
 }
 
+void
+kore_proctitle(const char *title)
+{
+	char		*p;
+	size_t		len;
+	int		i, slen;
+
+	len = 0;
+
+	for (i = 0; environ[i] != NULL; i++) {
+		p = kore_strdup(environ[i]);
+		len += strlen(environ[i]) + 1;
+		environ[i] = p;
+	}
+
+	for (i = 0; kore_argv[i] != NULL; i++)
+		len += strlen(kore_argv[i]) + 1;
+
+	kore_argv[1] = NULL;
+
+	slen = snprintf(kore_argv[0], len, "%s %s",
+	    basename(kore_progname), title);
+	if (slen == -1 || (size_t)slen >= len)
+		fatal("proctitle '%s' too large", title);
+
+	memset(kore_argv[0] + slen, 0, len - slen);
+}
+
 static void
 kore_server_sslstart(void)
 {
@@ -639,7 +675,7 @@ kore_server_start(int argc, char *argv[])
 	}
 #endif
 
-	kore_platform_proctitle("kore [parent]");
+	kore_platform_proctitle("[parent]");
 	kore_msg_init();
 	kore_worker_init();
 
diff --git a/src/linux.c b/src/linux.c
index 4c1c9e3..1fe75d1 100644
--- a/src/linux.c
+++ b/src/linux.c
@@ -211,9 +211,7 @@ kore_platform_disable_accept(void)
 void
 kore_platform_proctitle(char *title)
 {
-	if (prctl(PR_SET_NAME, title) == -1) {
-		kore_debug("prctl(): %s", errno_s);
-	}
+	kore_proctitle(title);
 }
 
 #if defined(KORE_USE_PLATFORM_SENDFILE)
diff --git a/src/worker.c b/src/worker.c
index f69e263..a992ca6 100644
--- a/src/worker.c
+++ b/src/worker.c
@@ -325,10 +325,10 @@ kore_worker_entry(struct kore_worker *kw)
 
 	worker = kw;
 
-	(void)snprintf(buf, sizeof(buf), "kore [wrk %d]", kw->id);
+	(void)snprintf(buf, sizeof(buf), "[wrk %d]", kw->id);
 #if !defined(KORE_NO_TLS)
 	if (kw->id == KORE_WORKER_KEYMGR)
-		(void)snprintf(buf, sizeof(buf), "kore [keymgr]");
+		(void)snprintf(buf, sizeof(buf), "[keymgr]");
 #endif
 	kore_platform_proctitle(buf);