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// Copyright (c) Meta Platforms, Inc. and affiliates.
// SPDX-License-Identifier: LGPL-2.1-or-later
#include <stdarg.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include "log.h"
#include "program.h"
#include "util.h"
LIBDRGN_PUBLIC void drgn_program_set_log_level(struct drgn_program *prog,
int level)
{
prog->log_level = level;
}
LIBDRGN_PUBLIC int drgn_program_get_log_level(struct drgn_program *prog)
{
return prog->log_level;
}
static void drgn_file_log_fn(struct drgn_program *prog, void *arg,
enum drgn_log_level level, const char *format,
va_list ap, struct drgn_error *err)
{
FILE *file = arg;
flockfile(file);
static const char * const prefix[] = {
[DRGN_LOG_DEBUG] = "debug: ",
[DRGN_LOG_INFO] = "info: ",
[DRGN_LOG_WARNING] = "warning: ",
[DRGN_LOG_ERROR] = "error: ",
[DRGN_LOG_CRITICAL] = "critical: ",
};
fputs(prefix[level], file);
vfprintf(file, format, ap);
if (err)
drgn_error_fwrite(file, err);
else
putc('\n', file);
funlockfile(file);
}
LIBDRGN_PUBLIC void drgn_program_set_log_file(struct drgn_program *prog,
FILE *file)
{
drgn_program_set_log_callback(prog, drgn_file_log_fn, file);
}
LIBDRGN_PUBLIC void drgn_program_set_log_callback(struct drgn_program *prog,
drgn_log_fn *callback,
void *callback_arg)
{
prog->log_fn = callback;
prog->log_arg = callback_arg;
}
LIBDRGN_PUBLIC void drgn_program_get_log_callback(struct drgn_program *prog,
drgn_log_fn **callback_ret,
void **callback_arg_ret)
{
*callback_ret = prog->log_fn;
*callback_arg_ret = prog->log_arg;
}
bool drgn_log_is_enabled(struct drgn_program *prog, enum drgn_log_level level)
{
return level >= prog->log_level;
}
void drgn_error_log(enum drgn_log_level level, struct drgn_program *prog,
struct drgn_error *err, const char *format, ...)
{
if (!drgn_log_is_enabled(prog, level))
return;
va_list ap;
va_start(ap, format);
prog->log_fn(prog, prog->log_arg, level, format, ap, err);
va_end(ap);
}
LIBDRGN_PUBLIC void drgn_program_set_progress_file(struct drgn_program *prog,
FILE *file)
{
prog->progress_file = file;
prog->default_progress_file = false;
}
FILE *drgn_program_get_progress_file(struct drgn_program *prog,
int *columns_ret)
{
*columns_ret = -1;
if (!prog->default_progress_file) {
if (prog->progress_file) {
int fd = fileno(prog->progress_file);
struct winsize winsize;
if (fd >= 0 && ioctl(fd, TIOCGWINSZ, &winsize) == 0)
*columns_ret = winsize.ws_col;
}
return prog->progress_file;
}
if (drgn_log_is_enabled(prog, DRGN_LOG_WARNING)
&& prog->log_fn == drgn_file_log_fn && prog->log_arg == stderr) {
int fd = fileno(stderr);
struct winsize winsize;
if (fd >= 0 && ioctl(fd, TIOCGWINSZ, &winsize) == 0) {
*columns_ret = winsize.ws_col;
return stderr;
}
}
return NULL;
}
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