/**
* Set process title, for the ps(1) command to report an updated title.
*
* The title is set from the executable's name, followed by the result of a
* printf(3) style expansion of the arguments as specified by the fmt argument.
*
* If the fmt argument begins with a ``-'' character, the executable's name
* is skipped.
*
* If fmt is NULL, the original process title is restored.
*/
void
setproctitle(const char *fmt, ...)
{
va_list args;
char *start;
size_t len;
buf_t *b, bs;
start = progname_args_start();
len = progname_args_size();
if (0 == len)
return;
b = buf_init(&bs, start, len);
memset(start, 0, len);
va_start(args, fmt);
if (NULL == fmt) {
buf_printf(b, "%s", progstart_arg(0));
} else if ('-' == *fmt) {
buf_vprintf(b, fmt + 1, args);
} else {
buf_printf(b, "%s ", getprogname());
buf_vcatf(b, fmt, args);
}
va_end(args);
}
Buf *buf_sprintf(const char *format, ...) {
va_list ap;
va_start(ap, format);
Buf *result = buf_vprintf(format, ap);
va_end(ap);
return result;
}
void buf_printf(struct buf *buf, const char *format, ...) {
va_list args;
va_start(args, format);
buf_vprintf(buf, format, args);
va_end(args);
}
