r295930 introduced the 'H' option to display thread IDs, but did not add the option to usage(). PR: 222837 Submitted by: Oliver Kiddle <okiddle@yahoo.co.uk> MFC after: 1 week
205 lines
5.9 KiB
C
205 lines
5.9 KiB
C
/*-
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* Copyright 1997 Sean Eric Fagan
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Sean Eric Fagan
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* 4. Neither the name of the author may be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* The main module for truss. Surprisingly simple, but, then, the other
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* files handle the bulk of the work. And, of course, the kernel has to
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* do a lot of the work :).
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*/
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#include <sys/ptrace.h>
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#include <err.h>
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#include <signal.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sysdecode.h>
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#include <time.h>
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#include <unistd.h>
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#include "truss.h"
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#include "extern.h"
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#include "syscall.h"
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static void
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usage(void)
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{
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fprintf(stderr, "%s\n%s\n",
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"usage: truss [-cfaedDHS] [-o file] [-s strsize] -p pid",
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" truss [-cfaedDHS] [-o file] [-s strsize] command [args]");
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exit(1);
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}
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int
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main(int ac, char **av)
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{
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struct sigaction sa;
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struct trussinfo *trussinfo;
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char *fname;
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char **command;
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pid_t pid;
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int c;
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fname = NULL;
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/* Initialize the trussinfo struct */
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trussinfo = (struct trussinfo *)calloc(1, sizeof(struct trussinfo));
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if (trussinfo == NULL)
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errx(1, "calloc() failed");
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pid = 0;
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trussinfo->outfile = stderr;
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trussinfo->strsize = 32;
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trussinfo->curthread = NULL;
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LIST_INIT(&trussinfo->proclist);
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init_syscalls();
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while ((c = getopt(ac, av, "p:o:facedDs:SH")) != -1) {
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switch (c) {
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case 'p': /* specified pid */
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pid = atoi(optarg);
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/* make sure i don't trace me */
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if (pid == getpid()) {
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errx(2, "attempt to grab self.");
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}
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break;
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case 'f': /* Follow fork()'s */
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trussinfo->flags |= FOLLOWFORKS;
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break;
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case 'a': /* Print execve() argument strings. */
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trussinfo->flags |= EXECVEARGS;
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break;
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case 'c': /* Count number of system calls and time. */
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trussinfo->flags |= (COUNTONLY | NOSIGS);
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break;
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case 'e': /* Print execve() environment strings. */
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trussinfo->flags |= EXECVEENVS;
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break;
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case 'd': /* Absolute timestamps */
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trussinfo->flags |= ABSOLUTETIMESTAMPS;
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break;
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case 'D': /* Relative timestamps */
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trussinfo->flags |= RELATIVETIMESTAMPS;
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break;
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case 'o': /* Specified output file */
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fname = optarg;
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break;
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case 's': /* Specified string size */
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trussinfo->strsize = atoi(optarg);
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break;
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case 'S': /* Don't trace signals */
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trussinfo->flags |= NOSIGS;
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break;
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case 'H':
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trussinfo->flags |= DISPLAYTIDS;
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break;
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default:
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usage();
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}
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}
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ac -= optind; av += optind;
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if ((pid == 0 && ac == 0) ||
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(pid != 0 && ac != 0))
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usage();
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if (fname != NULL) { /* Use output file */
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/*
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* Set close-on-exec ('e'), so that the output file is not
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* shared with the traced process.
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*/
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if ((trussinfo->outfile = fopen(fname, "we")) == NULL)
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err(1, "cannot open %s", fname);
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}
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/*
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* If truss starts the process itself, it will ignore some signals --
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* they should be passed off to the process, which may or may not
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* exit. If, however, we are examining an already-running process,
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* then we restore the event mask on these same signals.
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*/
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if (pid == 0) {
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/* Start a command ourselves */
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command = av;
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setup_and_wait(trussinfo, command);
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signal(SIGINT, SIG_IGN);
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signal(SIGTERM, SIG_IGN);
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signal(SIGQUIT, SIG_IGN);
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} else {
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sa.sa_handler = restore_proc;
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sa.sa_flags = 0;
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sigemptyset(&sa.sa_mask);
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sigaction(SIGINT, &sa, NULL);
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sigaction(SIGQUIT, &sa, NULL);
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sigaction(SIGTERM, &sa, NULL);
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start_tracing(trussinfo, pid);
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}
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/*
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* At this point, if we started the process, it is stopped waiting to
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* be woken up, either in exit() or in execve().
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*/
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if (LIST_FIRST(&trussinfo->proclist)->abi == NULL) {
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/*
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* If we are not able to handle this ABI, detach from the
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* process and exit. If we just created a new process to
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* run a command, kill the new process rather than letting
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* it run untraced.
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*/
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if (pid == 0)
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kill(LIST_FIRST(&trussinfo->proclist)->pid, SIGKILL);
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ptrace(PT_DETACH, LIST_FIRST(&trussinfo->proclist)->pid, NULL,
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0);
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return (1);
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}
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ptrace(PT_SYSCALL, LIST_FIRST(&trussinfo->proclist)->pid, (caddr_t)1,
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0);
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/*
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* At this point, it's a simple loop, waiting for the process to
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* stop, finding out why, printing out why, and then continuing it.
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* All of the grunt work is done in the support routines.
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*/
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clock_gettime(CLOCK_REALTIME, &trussinfo->start_time);
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eventloop(trussinfo);
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if (trussinfo->flags & COUNTONLY)
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print_summary(trussinfo);
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fflush(trussinfo->outfile);
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return (0);
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}
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