mirror of
https://github.com/checkpoint-restore/criu.git
synced 2026-07-28 12:36:47 +00:00
7aa8e4b6e2
The messages are filtered by their type
LOG_MSG - plain messages, they escape any (!) log level
filtration and go to stdout
LOG_ERROR - error messages
LOG_WARN - warning messages
LOG_INFO - informative messages
LOG_DEBUG - debug messages
By default the LOG_WARN log level is used, thus LOG_INFO
and LOG_DEBUG messages will not appear in output stream.
pr_panic helper was replaced with pr_err, pr_warning
shorthanded to pr_warn and old printk if rather pr_msg
now.
Because we share messages between "show" and "dump" actions,
before the "show" action proceed we need to tune up
log level and set it to LOG_INFO.
Also note that printing of VMA and siginfo now
became LOG_INFO messages, it was not that correct
to print them regardless the log level.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
105 lines
1.9 KiB
C
105 lines
1.9 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdbool.h>
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#include <limits.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <fcntl.h>
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#include "compiler.h"
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#include "types.h"
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#include "util.h"
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#define DEFAULT_LOGLEVEL LOG_WARN
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#define DEFAULT_LOGFD STDERR_FILENO
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static unsigned int current_loglevel = DEFAULT_LOGLEVEL;
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static int current_logfd = DEFAULT_LOGFD;
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int log_get_fd(void)
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{
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return current_logfd;
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}
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int log_init(const char *output)
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{
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struct rlimit rlimit;
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int new_logfd;
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if (getrlimit(RLIMIT_NOFILE, &rlimit)) {
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pr_perror("Can't get rlimit");
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return -1;
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}
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/*
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* We might need to transfer this descriptors
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* to another process' address space (and file
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* descriptors space) so we try to minimize
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* potential conflict between descriptors and
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* try to reopen them somewhere near a limit.
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*
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* Still an explicit output file might be
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* requested.
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*/
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new_logfd = rlimit.rlim_cur - 1;
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if (output) {
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new_logfd = open(output, O_CREAT | O_WRONLY);
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if (new_logfd < 0) {
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pr_perror("Can't create log file %s", output);
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return -1;
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}
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current_logfd = new_logfd;
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} else {
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if (reopen_fd_as(new_logfd, current_logfd) < 0)
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goto err;
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current_logfd = new_logfd;
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}
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return 0;
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err:
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pr_perror("Log engine failure, can't duplicate descriptor");
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return -1;
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}
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void log_fini(void)
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{
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if (current_logfd > 2)
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close_safe(¤t_logfd);
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current_logfd = DEFAULT_LOGFD;
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}
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void log_set_loglevel(unsigned int level)
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{
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if (!level)
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current_loglevel = DEFAULT_LOGLEVEL;
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else
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current_loglevel = level;
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}
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void print_on_level(unsigned int loglevel, const char *format, ...)
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{
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va_list params;
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int fd;
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if (unlikely(loglevel == LOG_MSG)) {
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fd = STDOUT_FILENO;
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} else {
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if (loglevel > current_loglevel)
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return;
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fd = current_logfd;
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}
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va_start(params, format);
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vdprintf(fd, format, params);
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va_end(params);
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}
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