1/*********************************************************************** 2* * 3* This software is part of the ast package * 4* Copyright (c) 1985-2011 AT&T Intellectual Property * 5* and is licensed under the * 6* Eclipse Public License, Version 1.0 * 7* by AT&T Intellectual Property * 8* * 9* A copy of the License is available at * 10* http://www.eclipse.org/org/documents/epl-v10.html * 11* (with md5 checksum b35adb5213ca9657e911e9befb180842) * 12* * 13* Information and Software Systems Research * 14* AT&T Research * 15* Florham Park NJ * 16* * 17* Glenn Fowler <gsf@research.att.com> * 18* David Korn <dgk@research.att.com> * 19* Phong Vo <kpv@research.att.com> * 20* * 21***********************************************************************/ 22#pragma prototyped 23 24/* 25 * trace systems calls if possible 26 */ 27 28#include <ast.h> 29#include <error.h> 30#include <proc.h> 31#include <debug.h> 32 33void 34systrace(const char* id) 35{ 36 register int n; 37 register char* out; 38 char* s; 39 char buf[PATH_MAX]; 40 char* av[7]; 41 long ov[2]; 42 43 static char* trace[] = { "trace", "truss", "strace", "traces" }; 44 45 if (!(s = getenv("HOME"))) 46 return; 47 if (!id && !(id = (const char*)error_info.id)) 48 id = (const char*)trace[0]; 49 out = buf; 50 out += sfsprintf(out, sizeof(buf), "%s/.%s/%s", s, trace[0], id); 51 if (access(buf, F_OK)) 52 return; 53 av[1] = trace[0]; 54 av[2] = "-o"; 55 av[3] = buf; 56 av[4] = "-p"; 57 av[5] = out + 1; 58 av[6] = 0; 59 ov[0] = PROC_FD_DUP(open("/dev/null", O_WRONLY), 2, PROC_FD_PARENT|PROC_FD_CHILD); 60 ov[1] = 0; 61 sfsprintf(out, &buf[sizeof(buf)] - out, ".%d", getpid()); 62 for (n = 0; n < elementsof(trace); n++) 63 if (!procfree(procopen(trace[n], av + 1, NiL, ov, PROC_ARGMOD|PROC_GID|PROC_UID|(n == (elementsof(trace) - 1) ? PROC_CLEANUP : 0)))) 64 { 65 sleep(1); 66 break; 67 } 68} 69