a8fa5f19bf
So it's easier to debug a failed boot. While at it avoid closing stdin, since a printf might inject unexpected input into a wrong place (a socket with FD 0). Redirect stdin from /dev/null instead. While at it improved error handling a bit (fork, waitpid can fail) nfsmount: same here Related: #40554
125 lines
2.1 KiB
C
125 lines
2.1 KiB
C
/*
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* Guillaume Cottenceau (gc@mandrakesoft.com)
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*
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* Copyright 2000 MandrakeSoft
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*
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* This software may be freely redistributed under the terms of the GNU
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* public license.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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/*
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* Portions from Erik Troan (ewt@redhat.com)
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*
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* Copyright 1996 Red Hat Software
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*
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*/
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "stage1.h"
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#include "log.h"
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static FILE * logfile = NULL;
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void vlog_message(const char * s, va_list args)
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{
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fprintf(logfile, "* ");
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vfprintf(logfile, s, args);
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fprintf(logfile, "\n");
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fflush(logfile);
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}
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void log_message(const char * s, ...)
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{
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va_list args;
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if (!logfile) {
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fprintf(stderr, "Log is not open!\n");
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return;
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}
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va_start(args, s);
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vlog_message(s, args);
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va_end(args);
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return;
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}
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void log_perror(char *msg)
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{
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log_message("%s: %s", msg, strerror(errno));
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}
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void open_log(void)
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{
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if (!IS_TESTING) {
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mknod("/dev/tty3", S_IFCHR, MKDEV(4, 3));
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logfile = fopen("/dev/tty3", "w");
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if (!logfile)
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logfile = fopen("/tmp/install.log", "a");
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}
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else
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logfile = fopen("debug.log", "w");
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}
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void close_log(void)
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{
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if (logfile) {
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log_message("stage1: disconnecting life support systems");
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fclose(logfile);
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}
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}
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int redirect2log(int fd)
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{
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int rc;
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if (!logfile) {
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fprintf(stderr, "%s: log file is not open", __func__);
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return -1;
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}
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rc = dup2(fileno(logfile), fd);
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if (rc < 0) {
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log_message("%s: dup2 %d: error: %s", __func__, fd, strerror(errno));
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}
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return rc;
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}
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int redirect2null(int fd)
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{
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int nullfd = -1, newfd = -1;
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nullfd = open("/dev/null", O_RDONLY);
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if (nullfd < 0) {
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log_message("%s: open /dev/null: %s", __func__, strerror(errno));
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goto out;
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}
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newfd = dup2(nullfd, fd);
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if (newfd < 0) {
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log_message("%s: dup2: %s", __func__, strerror(errno));
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goto out;
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}
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out:
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if (nullfd >= 0) {
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close(nullfd);
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}
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return newfd;
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}
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