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/* See LICENSE file for copyright and license details. */
#include "common.h"
static FILE *trace_fp;
static char last_char = '\n';
static pid_t last_pid = 0;
void
set_trace_output(FILE *fp)
{
trace_fp = fp;
}
void
tprintf(struct process *proc, const char *fmt, ...)
{
va_list ap;
if (fmt[0] == '\n' && fmt[1]) {
last_pid = 0;
fmt = &fmt[1];
}
if (last_char == '\n')
fprintf(trace_fp, "[%ju] ", (uintmax_t)proc->pid);
else if (proc->pid != last_pid)
fprintf(trace_fp, "\n[%ju] ", (uintmax_t)proc->pid);
va_start(ap, fmt);
vfprintf(trace_fp, fmt, ap);
last_pid = proc->pid;
last_char = strchr(fmt, '\0')[-1];
va_end(ap);
}
_Noreturn void
eprintf(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fprintf(stderr, "%s%s: ", last_char == '\n' ? "" : "\n", argv0);
vfprintf(stderr, fmt, ap);
switch (strchr(fmt, '\0')[-1]) {
case ':':
fprintf(stderr, " %s\n", strerror(errno));
break;
case '\n':
break;
default:
fprintf(stderr, "\n");
break;
}
va_end(ap);
exit(1);
}
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