void
setproctitle_impl(const char *fmt, ...)
{
/* Use buffer in case argv[0] is passed. */
char buf[SPT_MAXTITLE + 1];
va_list ap;
char *nul;
int len;
if (SPT.base == NULL) {
if (!SPT.warned) {
warnx("setproctitle not initialized, please either call "
"setproctitle_init() or link against libbsd-ctor.");
SPT.warned = true;
}
return;
}
if (fmt) {
if (fmt[0] == '-') {
/* Skip program name prefix. */
fmt++;
len = 0;
} else {
/* Print program name heading for grep. */
snprintf(buf, sizeof(buf), "%s: ", getprogname());
len = strlen(buf);
}
va_start(ap, fmt);
len += vsnprintf(buf + len, sizeof(buf) - len, fmt, ap);
va_end(ap);
} else {
len = snprintf(buf, sizeof(buf), "%s", SPT.arg0);
}
if (len <= 0) {
SPT.error = errno;
return;
}
if (!SPT.reset) {
memset(SPT.base, 0, SPT.end - SPT.base);
SPT.reset = true;
} else {
memset(SPT.base, 0, spt_min(sizeof(buf), SPT.end - SPT.base));
}
len = spt_min(len, spt_min(sizeof(buf), SPT.end - SPT.base) - 1);
memcpy(SPT.base, buf, len);
nul = &SPT.base[len];
if (nul < SPT.nul) {
*SPT.nul = '.';
} else if (nul == SPT.nul && &nul[1] < SPT.end) {
*SPT.nul = ' ';
*++nul = '\0';
}
}
void setproctitle(const char *fmt, ...) {
char buf[SPT_MAXTITLE + 1]; /* use buffer in case argv[0] is passed */
va_list ap;
char *nul;
int len, error;
if (!SPT.base)
return;
if (fmt) {
va_start(ap, fmt);
len = vsnprintf(buf, sizeof buf, fmt, ap);
va_end(ap);
} else {
len = snprintf(buf, sizeof buf, "%s", SPT.arg0);
}
if (len <= 0)
{ error = errno; goto error; }
if (!SPT.reset) {
memset(SPT.base, 0, SPT.end - SPT.base);
SPT.reset = 1;
} else {
memset(SPT.base, 0, spt_min(sizeof buf, SPT.end - SPT.base));
}
len = spt_min(len, spt_min(sizeof buf, SPT.end - SPT.base) - 1);
memcpy(SPT.base, buf, len);
nul = &SPT.base[len];
if (nul < SPT.nul) {
*SPT.nul = '.';
} else if (nul == SPT.nul && &nul[1] < SPT.end) {
*SPT.nul = ' ';
*++nul = '\0';
}
return;
error:
SPT.error = error;
} /* setproctitle() */
