From 3cf51049e025bef7764383535ba0b8094232a587 Mon Sep 17 00:00:00 2001
From: Philippe Charnier <charnier@FreeBSD.org>
Date: Mon, 5 Jan 1998 07:30:26 +0000
Subject: [PATCH] Sort Xrefs. Use err(3). Remove uneeded #include. Correct
 usage: one of {-p pid, command} is required. Open output file when command
 line is fully analyzed: incorrect `truss -o f' command does not create an
 empty file anymore.

---
 usr.bin/truss/amd64-fbsd32.c  | 18 ++++++--------
 usr.bin/truss/amd64-linux32.c | 19 +++++++-------
 usr.bin/truss/i386-fbsd.c     | 18 ++++++--------
 usr.bin/truss/i386-linux.c    | 19 +++++++-------
 usr.bin/truss/main.c          | 47 ++++++++++++++++++-----------------
 usr.bin/truss/setup.c         | 22 ++++++++--------
 usr.bin/truss/syscalls.c      | 24 ++++++++++--------
 usr.bin/truss/truss.1         | 40 ++++++++++++++++++-----------
 8 files changed, 107 insertions(+), 100 deletions(-)

diff --git a/usr.bin/truss/amd64-fbsd32.c b/usr.bin/truss/amd64-fbsd32.c
index 57d7d8839e7d..e141e2c209ba 100644
--- a/usr.bin/truss/amd64-fbsd32.c
+++ b/usr.bin/truss/amd64-fbsd32.c
@@ -27,9 +27,13 @@
  * 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[] =
+	"$Id$";
+#endif /* not lint */
+
 /*
  * FreeBSD/386-specific system call handling.  This is probably the most
  * complex part of the entire truss program, although I've got lots of
@@ -37,17 +41,13 @@
  * automatically, thanks to /usr/src/sys/kern/syscalls.master.  The
  * names used for the various structures are confusing, I sadly admit.
  */
-/*
- * $Id: i386-fbsd.c,v 1.1 1997/12/06 05:22:50 sef Exp $
- */
 
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <errno.h>
-#include <err.h>
-#include <signal.h>
-#include <fcntl.h>
 #include <unistd.h>
 #include <sys/ioctl.h>
 #include <sys/pioctl.h>
@@ -113,7 +113,6 @@ i386_syscall_entry(int pid, int nargs) {
   struct reg regs = { 0 };
   int syscall;
   int i;
-  int memfd;
   unsigned int parm_offset;
   struct syscall *sc;
 
@@ -190,7 +189,6 @@ i386_syscall_entry(int pid, int nargs) {
    */
 
   if (fsc.name) {
-    char *tmp;
 
 #if DEBUG
     fprintf(stderr, "syscall %s(", fsc.name);
diff --git a/usr.bin/truss/amd64-linux32.c b/usr.bin/truss/amd64-linux32.c
index fc1f9b044c7a..0cb7c22302af 100644
--- a/usr.bin/truss/amd64-linux32.c
+++ b/usr.bin/truss/amd64-linux32.c
@@ -27,24 +27,25 @@
  * 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[] =
+	"$Id$";
+#endif /* not lint */
+
 /*
  * Linux/i386-specific system call handling.  Given how much of this code
  * is taken from the freebsd equivalent, I can probably put even more of
  * it in support routines that can be used by any personality support.
  */
-/*
- * $Id: i386-linux.c,v 1.1 1997/12/06 05:22:54 sef Exp $
- */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <errno.h>
-#include <err.h>
-#include <signal.h>
-#include <fcntl.h>
 #include <unistd.h>
 #include <sys/ioctl.h>
 #include <sys/pioctl.h>
@@ -91,7 +92,6 @@ i386_linux_syscall_entry(int pid, int nargs) {
   struct reg regs = { 0 };
   int syscall;
   int i;
-  int memfd;
   struct syscall *sc;
 
   if (fd == -1 || pid != cpid) {
@@ -149,7 +149,6 @@ i386_linux_syscall_entry(int pid, int nargs) {
   lsc.sc = sc;
 
   if (lsc.name) {
-    char *tmp;
 
 #ifdef DEBUG
     fprintf(stderr, "syscall %s(", lsc.name);
diff --git a/usr.bin/truss/i386-fbsd.c b/usr.bin/truss/i386-fbsd.c
index 57d7d8839e7d..e141e2c209ba 100644
--- a/usr.bin/truss/i386-fbsd.c
+++ b/usr.bin/truss/i386-fbsd.c
@@ -27,9 +27,13 @@
  * 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[] =
+	"$Id$";
+#endif /* not lint */
+
 /*
  * FreeBSD/386-specific system call handling.  This is probably the most
  * complex part of the entire truss program, although I've got lots of
@@ -37,17 +41,13 @@
  * automatically, thanks to /usr/src/sys/kern/syscalls.master.  The
  * names used for the various structures are confusing, I sadly admit.
  */
-/*
- * $Id: i386-fbsd.c,v 1.1 1997/12/06 05:22:50 sef Exp $
- */
 
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <errno.h>
-#include <err.h>
-#include <signal.h>
-#include <fcntl.h>
 #include <unistd.h>
 #include <sys/ioctl.h>
 #include <sys/pioctl.h>
@@ -113,7 +113,6 @@ i386_syscall_entry(int pid, int nargs) {
   struct reg regs = { 0 };
   int syscall;
   int i;
-  int memfd;
   unsigned int parm_offset;
   struct syscall *sc;
 
@@ -190,7 +189,6 @@ i386_syscall_entry(int pid, int nargs) {
    */
 
   if (fsc.name) {
-    char *tmp;
 
 #if DEBUG
     fprintf(stderr, "syscall %s(", fsc.name);
diff --git a/usr.bin/truss/i386-linux.c b/usr.bin/truss/i386-linux.c
index fc1f9b044c7a..0cb7c22302af 100644
--- a/usr.bin/truss/i386-linux.c
+++ b/usr.bin/truss/i386-linux.c
@@ -27,24 +27,25 @@
  * 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[] =
+	"$Id$";
+#endif /* not lint */
+
 /*
  * Linux/i386-specific system call handling.  Given how much of this code
  * is taken from the freebsd equivalent, I can probably put even more of
  * it in support routines that can be used by any personality support.
  */
-/*
- * $Id: i386-linux.c,v 1.1 1997/12/06 05:22:54 sef Exp $
- */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <errno.h>
-#include <err.h>
-#include <signal.h>
-#include <fcntl.h>
 #include <unistd.h>
 #include <sys/ioctl.h>
 #include <sys/pioctl.h>
@@ -91,7 +92,6 @@ i386_linux_syscall_entry(int pid, int nargs) {
   struct reg regs = { 0 };
   int syscall;
   int i;
-  int memfd;
   struct syscall *sc;
 
   if (fd == -1 || pid != cpid) {
@@ -149,7 +149,6 @@ i386_linux_syscall_entry(int pid, int nargs) {
   lsc.sc = sc;
 
   if (lsc.name) {
-    char *tmp;
 
 #ifdef DEBUG
     fprintf(stderr, "syscall %s(", lsc.name);
diff --git a/usr.bin/truss/main.c b/usr.bin/truss/main.c
index 8261b7fc2fd6..37608bb636cf 100644
--- a/usr.bin/truss/main.c
+++ b/usr.bin/truss/main.c
@@ -27,25 +27,26 @@
  * 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[] =
+	"$Id$";
+#endif /* not lint */
+
 /*
  * The main module for truss.  Suprisingly simple, but, then, the other
  * files handle the bulk of the work.  And, of course, the kernel has to
  * do a lot of the work :).
  */
-/*
- * $Id: main.c,v 1.5 1997/12/13 03:13:47 sef Exp $
- */
 
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <errno.h>
-#include <err.h>
-#include <signal.h>
-#include <fcntl.h>
 #include <unistd.h>
 #include <sys/ioctl.h>
 #include <sys/pioctl.h>
@@ -65,14 +66,15 @@ extern void i386_linux_syscall_exit(int, int);
 int pid = 0;
 int nosigs = 0;
 FILE *outfile = stderr;
-char *prog;
 int Procfd;
 char progtype[50];	/* OS and type of executable */
 
 static inline void
-usage(void) {
-  fprintf(stderr, "usage:  %s [-o <file>] [-S] { [-p <pid> ] | "
-	  "[ <command> <args>] }\n", prog);
+usage(void)
+{
+  fprintf(stderr, "%s\n%s\n",
+	"usage: truss [-S] [-o file] -p pid",
+	"       truss [-S] [-o file] command [args]");
   exit(1);
 }
 
@@ -116,18 +118,15 @@ set_etype() {
   return funcs;
 }
 
+int
 main(int ac, char **av) {
-  int mask;
   int c;
   int i;
   char **command;
   struct procfs_status pfs;
-  char etype[25];
   struct ex_types *funcs;
-  int fd;
   int in_exec = 0;
-
-  prog = av[0];
+  char *fname = NULL;
 
   while ((c = getopt(ac, av, "p:o:S")) != EOF) {
     switch (c) {
@@ -135,10 +134,7 @@ main(int ac, char **av) {
       pid = atoi(optarg);
       break;
     case 'o':	/* Specified output file */
-      if ((outfile = fopen(optarg, "w")) == NULL) {
-	fprintf (stderr, "%s:  cannot open %s\n", av[0], optarg);
-	exit(1);
-      }
+      fname = optarg;
       break;
     case 'S':	/* Don't trace signals */ 
       nosigs = 1;
@@ -152,6 +148,11 @@ main(int ac, char **av) {
   if ((pid == 0 && ac == 0) || (pid != 0 && ac != 0))
     usage();
 
+  if (fname != NULL) { /* Use output file */
+    if ((outfile = fopen(fname, "w")) == NULL)
+      errx(1, "cannot open %s", fname);
+  }
+
   /*
    * If truss starts the process itself, it will ignore some signals --
    * they should be passed off to the process, which may or may not
@@ -193,7 +194,7 @@ main(int ac, char **av) {
     int val = 0;
 
     if (ioctl(Procfd, PIOCWAIT, &pfs) == -1)
-      perror("PIOCWAIT top of loop");
+      warn("PIOCWAIT top of loop");
     else {
       switch(i = pfs.why) {
       case S_SCE:
@@ -229,7 +230,7 @@ main(int ac, char **av) {
       }
     }
     if (ioctl(Procfd, PIOCCONT, val) == -1)
-      perror("PIOCCONT");
+      warn("PIOCCONT");
   } while (pfs.why != S_EXIT);
   return 0;
 }
diff --git a/usr.bin/truss/setup.c b/usr.bin/truss/setup.c
index 407dd7fb1d12..9d0abf2ea30c 100644
--- a/usr.bin/truss/setup.c
+++ b/usr.bin/truss/setup.c
@@ -27,25 +27,26 @@
  * 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[] =
+	"$Id$";
+#endif /* not lint */
+
 /*
  * Various setup functions for truss.  Not the cleanest-written code,
  * I'm afraid.
  */
-/*
- * $Id: setup.c,v 1.5 1997/12/13 03:13:47 sef Exp $
- */
 
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#include <errno.h>
-#include <err.h>
-#include <fcntl.h>
-#include <signal.h>
 #include <sys/ioctl.h>
 #include <sys/pioctl.h>
 #include <sys/types.h>
@@ -66,7 +67,6 @@ setup_and_wait(char *command[]) {
   char buf[32];
   int fd;
   int pid;
-  extern char *prog;
   int flags;
 
   pid = vfork();
@@ -88,7 +88,7 @@ setup_and_wait(char *command[]) {
      * we want.
      */
     if (ioctl(fd, PIOCSFL, flags) == -1)
-      perror("cannot set PF_LINGER");
+      warn("cannot set PF_LINGER");
     execvp(command[0], command);
     mask = ~0;
     ioctl(fd, PIOCBIC, ~0);
@@ -151,7 +151,7 @@ start_tracing(int pid, int flags) {
    */
 
   if (ioctl(fd, PIOCSFL, 0) == -1)
-    perror("cannot clear PF_LINGER");
+    warn("cannot clear PF_LINGER");
 
   return fd;
 }
diff --git a/usr.bin/truss/syscalls.c b/usr.bin/truss/syscalls.c
index 7118836e2e42..9c29d5255236 100644
--- a/usr.bin/truss/syscalls.c
+++ b/usr.bin/truss/syscalls.c
@@ -27,17 +27,19 @@
  * 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[] =
+	"$Id$";
+#endif /* not lint */
+
 /*
  * This file has routines used to print out system calls and their
  * arguments.
  */
-/*
- * $Id: syscalls.c,v 1.2 1997/12/06 06:51:14 sef Exp $
- */
 
+#include <err.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -75,9 +77,11 @@ struct syscall syscalls[] = {
 	  { { Int, 0}, { Ioctl, 1 }, { Hex, 2 }}},
 	{ "break", 1, 1, { { Hex, 0 }}},
 	{ "exit", 0, 1, { { Hex, 0 }}},
-	{ 0, 0, 0, { 0, 0 } },
+	{ 0, 0, 0, { { 0, 0 }}},
 };
 
+char * ioctlname __P((int));
+
 /*
  * If/when the list gets big, it might be desirable to do it
  * as a hash table or binary search.
@@ -104,14 +108,12 @@ get_syscall(const char *name) {
 
 char *
 get_string(int procfd, void *offset, int max) {
-	char *buf, *tmp;
+	char *buf;
 	int size, len, c;
 	FILE *p;
 
-	if ((p = fdopen(procfd, "r")) == NULL) {
-		perror("fdopen");
-		exit(1);
-	}
+	if ((p = fdopen(procfd, "r")) == NULL)
+		err(1, "fdopen");
 	buf = malloc( size = (max ? max : 64 ) );
 	len = 0;
 	fseek(p, (long)offset, SEEK_SET);
@@ -164,7 +166,7 @@ make_quad(unsigned long p1, unsigned long p2) {
 
 char *
 print_arg(int fd, struct syscall_args *sc, unsigned long *args) {
-  char *tmp;
+  char *tmp = NULL;
   switch (sc->type & ARG_MASK) {
   case Hex:
     tmp = malloc(12);
diff --git a/usr.bin/truss/truss.1 b/usr.bin/truss/truss.1
index e3cdb5fde534..0cfabea724e9 100644
--- a/usr.bin/truss/truss.1
+++ b/usr.bin/truss/truss.1
@@ -2,35 +2,41 @@
 .Dt TRUSS 1
 .Os FreeBSD
 .Sh NAME
-.Nm \&truss
+.Nm truss
 .Nd trace system calls
-.Sh Synopsis
-.Nm \&truss
+.Sh SYNOPSIS
+.Nm truss
+.Op Fl S
+.Op Fl o Ar file
+.Fl p Ar pid
+.Nm truss
 .Op Fl S
-.Op Fl p Ar pid
 .Op Fl o Ar file
 command
+.Op args
 .Sh DESCRIPTION
-.Nm \&truss
+.Nm Truss
 traces the system calls called by the specified process or program.
 Output is to the specified output file, or standard error by default.
 It does this by stopping and restarting the process being monitored via
 .Xr procfs 5 .
 .Pp
 The options are as follows:
-.Bl -tag -width command
+.Bl -tag -width indent
 .It Fl S
 Do not display information about signals received by the process.
 (Normally,
-.Nm \&truss
+.Nm
 displays signal as well as system call events.)
-.It Fl p
+.It Fl o Ar file
+Print the output to the specified
+.Ar file
+instead of standard error.
+.It Fl p Ar pid
 Follow the process specified by 
 .Ar pid
 instead of a new command.
-.It Fl o
-Print the output to the specified file instead of standard error.
-.It Ar command
+.It Ar command Op args
 Execute
 .Ar command
 and trace the system calls of it.
@@ -47,11 +53,15 @@ options are mutually exclusive.)
 # Follow an already-running process
 .Dl $ truss -p 1
 .Sh SEE ALSO
-.Xr procfs 5 ,
+.Xr kdump 1 ,
 .Xr ktrace 1 ,
-.Xr kdump 1
+.Xr procfs 5
 .Sh HISTORY
 The
-.Nm truss
-command was written by Sean Eric Fagan for FreeBSD; it was modeled after
+.Nm
+command was written by
+.An Sean Eric Fagan
+for
+.Bx Free Ns ;
+it was modeled after
 similar commands available for System V Release 4 and SunOS.