Index: head/usr.bin/truss/main.c =================================================================== --- head/usr.bin/truss/main.c (revision 289079) +++ head/usr.bin/truss/main.c (revision 289080) @@ -1,211 +1,211 @@ /*- * Copyright 1997 Sean Eric Fagan * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Sean Eric Fagan * 4. Neither the name of the author may be used to endorse or promote * products derived from this software without specific prior written * permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 THE AUTHOR 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. */ #include __FBSDID("$FreeBSD$"); /* * The main module for truss. Surprisingly 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 :). */ #include #include #include #include #include #include #include #include "truss.h" #include "extern.h" #include "syscall.h" static void usage(void) { fprintf(stderr, "%s\n%s\n", "usage: truss [-cfaedDS] [-o file] [-s strsize] -p pid", " truss [-cfaedDS] [-o file] [-s strsize] command [args]"); exit(1); } char * strsig(int sig) { static char tmp[64]; if (sig > 0 && sig < NSIG) { snprintf(tmp, sizeof(tmp), "SIG%s", sys_signame[sig]); return (tmp); } return (NULL); } int main(int ac, char **av) { struct sigaction sa; struct trussinfo *trussinfo; char *fname; char **command; pid_t pid; int c; fname = NULL; /* Initialize the trussinfo struct */ trussinfo = (struct trussinfo *)calloc(1, sizeof(struct trussinfo)); if (trussinfo == NULL) errx(1, "calloc() failed"); pid = 0; trussinfo->outfile = stderr; trussinfo->strsize = 32; trussinfo->curthread = NULL; LIST_INIT(&trussinfo->proclist); init_syscalls(); while ((c = getopt(ac, av, "p:o:facedDs:S")) != -1) { switch (c) { case 'p': /* specified pid */ pid = atoi(optarg); /* make sure i don't trace me */ if (pid == getpid()) { errx(2, "attempt to grab self."); } break; case 'f': /* Follow fork()'s */ trussinfo->flags |= FOLLOWFORKS; break; case 'a': /* Print execve() argument strings. */ trussinfo->flags |= EXECVEARGS; break; case 'c': /* Count number of system calls and time. */ - trussinfo->flags |= COUNTONLY; + trussinfo->flags |= (COUNTONLY | NOSIGS); break; case 'e': /* Print execve() environment strings. */ trussinfo->flags |= EXECVEENVS; break; case 'd': /* Absolute timestamps */ trussinfo->flags |= ABSOLUTETIMESTAMPS; break; case 'D': /* Relative timestamps */ trussinfo->flags |= RELATIVETIMESTAMPS; break; case 'o': /* Specified output file */ fname = optarg; break; case 's': /* Specified string size */ trussinfo->strsize = atoi(optarg); break; case 'S': /* Don't trace signals */ trussinfo->flags |= NOSIGS; break; default: usage(); } } ac -= optind; av += optind; if ((pid == 0 && ac == 0) || (pid != 0 && ac != 0)) usage(); if (fname != NULL) { /* Use output file */ /* * Set close-on-exec ('e'), so that the output file is not * shared with the traced process. */ if ((trussinfo->outfile = fopen(fname, "we")) == NULL) err(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 * exit. If, however, we are examining an already-running process, * then we restore the event mask on these same signals. */ if (pid == 0) { /* Start a command ourselves */ command = av; setup_and_wait(trussinfo, command); signal(SIGINT, SIG_IGN); signal(SIGTERM, SIG_IGN); signal(SIGQUIT, SIG_IGN); } else { sa.sa_handler = restore_proc; sa.sa_flags = 0; sigemptyset(&sa.sa_mask); sigaction(SIGINT, &sa, NULL); sigaction(SIGQUIT, &sa, NULL); sigaction(SIGTERM, &sa, NULL); start_tracing(trussinfo, pid); } /* * At this point, if we started the process, it is stopped waiting to * be woken up, either in exit() or in execve(). */ if (LIST_FIRST(&trussinfo->proclist)->abi == NULL) { /* * If we are not able to handle this ABI, detach from the * process and exit. If we just created a new process to * run a command, kill the new process rather than letting * it run untraced. */ if (pid == 0) kill(LIST_FIRST(&trussinfo->proclist)->pid, SIGKILL); ptrace(PT_DETACH, LIST_FIRST(&trussinfo->proclist)->pid, NULL, 0); return (1); } ptrace(PT_SYSCALL, LIST_FIRST(&trussinfo->proclist)->pid, (caddr_t)1, 0); /* * At this point, it's a simple loop, waiting for the process to * stop, finding out why, printing out why, and then continuing it. * All of the grunt work is done in the support routines. */ clock_gettime(CLOCK_REALTIME, &trussinfo->start_time); eventloop(trussinfo); if (trussinfo->flags & COUNTONLY) print_summary(trussinfo); fflush(trussinfo->outfile); return (0); } Index: head/usr.bin/truss/truss.1 =================================================================== --- head/usr.bin/truss/truss.1 (revision 289079) +++ head/usr.bin/truss/truss.1 (revision 289080) @@ -1,108 +1,108 @@ .\" $FreeBSD$ .\" -.Dd October 5, 2015 +.Dd October 9, 2015 .Dt TRUSS 1 .Os .Sh NAME .Nm truss .Nd trace system calls .Sh SYNOPSIS .Nm .Op Fl facedDS .Op Fl o Ar file .Op Fl s Ar strsize .Fl p Ar pid .Nm .Op Fl facedDS .Op Fl o Ar file .Op Fl s Ar strsize .Ar command Op Ar args .Sh DESCRIPTION The .Nm utility 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 ptrace 2 . .Pp The options are as follows: .Bl -tag -width indent .It Fl f Trace descendants of the original traced process created by .Xr fork 2 , .Xr vfork 2 , etc. .It Fl a Show the argument strings that are passed in each .Xr execve 2 system call. .It Fl c -Do not display individual system calls. +Do not display individual system calls or signals. Instead, before exiting, print a summary containing for each system call: the total system time used, the number of times the call was invoked, and the number of times the call returned with an error. .It Fl e Show the environment strings that are passed in each .Xr execve 2 system call. .It Fl d Include timestamps in the output showing the time elapsed since the trace was started. .It Fl D Include timestamps in the output showing the time elapsed since the last recorded event. .It Fl S Do not display information about signals received by the process. (Normally, .Nm displays signal as well as system call events.) .It Fl o Ar file Print the output to the specified .Ar file instead of standard error. .It Fl s Ar strsize Display strings using at most .Ar strsize characters. If the buffer is larger, .Dq Li ... will be displayed at the end of the string. The default .Ar strsize is 32. .It Fl p Ar pid Follow the process specified by .Ar pid instead of a new command. .It Ar command Op Ar args Execute .Ar command and trace the system calls of it. (The .Fl p and .Ar command options are mutually exclusive.) .El .Sh EXAMPLES # Follow the system calls used in echoing "hello" .Dl $ truss /bin/echo hello # Do the same, but put the output into a file .Dl $ truss -o /tmp/truss.out /bin/echo hello # Follow an already-running process .Dl $ truss -p 34 .Sh SEE ALSO .Xr kdump 1 , .Xr ktrace 1 , .Xr ptrace 2 , .Xr utrace 2 .Sh HISTORY The .Nm command was written by .An Sean Eric Fagan for .Fx . It was modeled after similar commands available for System V Release 4 and SunOS.