/* Set tracing after a signal.
*/
void
set_tracelevel(void)
{
if (new_tracelevel == tracelevel)
return;
/* If tracing entirely off, and there was no tracefile specified
* on the command line, then leave it off.
*/
if (new_tracelevel > tracelevel && ftrace == NULL) {
if (savetracename[0] != '\0') {
set_tracefile(savetracename,sigtrace_pat,0);
} else if (inittracename[0] != '\0') {
set_tracefile(inittracename,sigtrace_pat,0);
} else {
new_tracelevel = 0;
return;
}
} else {
tracelevel_msg(sigtrace_pat, 0);
}
}
void
set_tracefile(const char *filename,
const char *pat,
int dump) /* -1=no dump, 0=default, 1=force */
{
struct stat stbuf;
FILE *n_ftrace;
const char *fn;
/* Allow a null filename to increase the level if the trace file
* is already open or if coming from a trusted source, such as
* a signal or the command line.
*/
if (filename == NULL || filename[0] == '\0') {
filename = NULL;
if (ftrace == NULL) {
if (inittracename[0] == '\0') {
msglog("missing trace file name");
return;
}
fn = inittracename;
} else {
fn = NULL;
}
} else if (!strcmp(filename,"dump/../table")) {
trace_dump();
return;
} else {
/* Allow the file specified with "-T file" to be reopened,
* but require all other names specified over the net to
* match the official path. The path can specify a directory
* in which the file is to be created.
*/
if (strcmp(filename, inittracename)
#ifdef _PATH_TRACE
&& (strncmp(filename, _PATH_TRACE, sizeof(_PATH_TRACE)-1)
|| strstr(filename,"../")
|| 0 > stat(_PATH_TRACE, &stbuf))
#endif
) {
msglog("wrong trace file \"%s\"", filename);
return;
}
/* If the new tracefile exists, it must be a regular file.
*/
if (stat(filename, &stbuf) >= 0 && !S_ISREG(stbuf.st_mode)) {
msglog("wrong type (%#x) of trace file \"%s\"",
stbuf.st_mode, filename);
return;
}
fn = filename;
}
if (fn != NULL) {
n_ftrace = fopen(fn, "a");
if (n_ftrace == NULL) {
msglog("failed to open trace file \"%s\" %s",
fn, strerror(errno));
if (fn == inittracename)
inittracename[0] = '\0';
return;
}
tmsg("switch to trace file %s", fn);
trace_close(file_trace = 1);
if (fn != savetracename)
strncpy(savetracename, fn, sizeof(savetracename)-1);
ftrace = n_ftrace;
fflush(stdout);
fflush(stderr);
dup2(fileno(ftrace), STDOUT_FILENO);
dup2(fileno(ftrace), STDERR_FILENO);
}
if (new_tracelevel == 0 || filename == NULL)
new_tracelevel++;
tracelevel_msg(pat, dump != 0 ? dump : (filename != NULL));
}
void
set_tracefile(const char *filename,
const char *pat,
int dump) /* -1=no dump, 0=default, 1=force */
{
struct stat stbuf;
struct stat stbuf2;
FILE *n_ftrace;
const char *fn;
int nfd;
boolean_t allow_create;
/*
* main() calls this routine with "dump == -1". All others
* call it with 0, so we take dump == -1 to mean "can create
* the file."
*/
allow_create = (dump == -1);
/*
* Allow a null filename to increase the level if the trace file
* is already open or if coming from a trusted source, such as
* a signal or the command line.
*/
if (filename == NULL || filename[0] == '\0') {
filename = NULL;
if (ftrace == NULL) {
if (inittracename[0] == '\0') {
msglog("missing trace file name");
return;
}
fn = inittracename;
} else {
goto set_tracelevel;
}
} else if (strcmp(filename, "dump/../table") == 0) {
trace_dump();
return;
} else {
/*
* Allow the file specified with "-T file" to be reopened,
* but require all other names specified over the net to
* match the official path. The path can specify a directory
* in which the file is to be created.
*/
if (strcmp(filename, inittracename) != 0) {
if (strncmp(filename, PATH_TRACE,
sizeof (PATH_TRACE)-1) != 0 ||
(strstr(filename, "../") != NULL)) {
msglog("wrong trace file \"%s\"", filename);
return;
}
if (stat(PATH_TRACE, &stbuf) == -1) {
fn = PATH_TRACE;
goto missing_file;
}
if (filename[sizeof (PATH_TRACE) - 1] != '\0' &&
(filename[sizeof (PATH_TRACE) - 1] != '/' ||
!S_ISDIR(stbuf.st_mode))) {
goto bad_file_type;
}
if (S_ISDIR(stbuf.st_mode))
allow_create = _B_TRUE;
}
fn = filename;
}
/* fn cannot be null here */
/* If the new tracefile exists, it must be a regular file. */
if (lstat(fn, &stbuf) == -1) {
if (!allow_create)
goto missing_file;
nfd = open(fn, O_CREAT|O_EXCL|O_WRONLY, 0644);
if (nfd != -1 && fstat(nfd, &stbuf) == -1) {
(void) close(nfd);
goto missing_file;
}
} else if (S_ISREG(stbuf.st_mode)) {
nfd = open(fn, O_APPEND|O_WRONLY, 0644);
} else {
goto bad_file_type;
}
if (nfd == -1 || (n_ftrace = fdopen(nfd, "a")) == NULL) {
msglog("failed to open trace file \"%s\" %s", fn,
rip_strerror(errno));
if (fn == inittracename)
inittracename[0] = '\0';
if (nfd != -1)
(void) close(nfd);
return;
}
if (fstat(nfd, &stbuf2) == -1 || !S_ISREG(stbuf2.st_mode) ||
stbuf2.st_dev != stbuf.st_dev || stbuf2.st_ino != stbuf.st_ino) {
msglog("trace file \"%s\" moved", fn);
(void) fclose(n_ftrace);
return;
}
tmsg("switch to trace file %s", fn);
trace_close(file_trace = _B_TRUE);
(void) dup2(nfd, STDOUT_FILENO);
(void) dup2(nfd, STDERR_FILENO);
if (fn != savetracename)
(void) strlcpy(savetracename, fn, sizeof (savetracename) - 1);
ftrace = n_ftrace;
set_tracelevel:
if (new_tracelevel == 0 || filename == NULL)
new_tracelevel++;
tracelevel_msg(pat, dump != 0 ? dump : (filename != NULL));
return;
missing_file:
msglog("trace \"%s\" missing", fn);
return;
bad_file_type:
msglog("wrong type (%#x) of trace file \"%s\"", stbuf.st_mode, fn);
}
