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/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2011 AT&T Intellectual Property *
* and is licensed under the *
* Eclipse Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.eclipse.org/org/documents/epl-v10.html *
* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* trace systems calls if possible
*/
#include <ast.h>
#include <error.h>
#include <proc.h>
#include <debug.h>
void
systrace(const char* id)
{
register int n;
register char* out;
char* s;
char buf[PATH_MAX];
char* av[7];
long ov[2];
static char* trace[] = { "trace", "truss", "strace", "traces" };
if (!(s = getenv("HOME")))
return;
if (!id && !(id = (const char*)error_info.id))
id = (const char*)trace[0];
out = buf;
out += sfsprintf(out, sizeof(buf), "%s/.%s/%s", s, trace[0], id);
if (access(buf, F_OK))
return;
av[1] = trace[0];
av[2] = "-o";
av[3] = buf;
av[4] = "-p";
av[5] = out + 1;
av[6] = 0;
ov[0] = PROC_FD_DUP(open("/dev/null", O_WRONLY), 2, PROC_FD_PARENT|PROC_FD_CHILD);
ov[1] = 0;
sfsprintf(out, &buf[sizeof(buf)] - out, ".%d", getpid());
for (n = 0; n < elementsof(trace); n++)
if (!procfree(procopen(trace[n], av + 1, NiL, ov, PROC_ARGMOD|PROC_GID|PROC_UID|(n == (elementsof(trace) - 1) ? PROC_CLEANUP : 0))))
{
sleep(1);
break;
}
}
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