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/* casper-md5check - a tool to check md5sums and talk to usplash
(C) Canonical Ltd 2006
Written by Tollef Fog Heen <tfheen@ubuntu.com>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA. */
#define _GNU_SOURCE
#include <stdio.h>
#include <unistd.h>
#include <sys/reboot.h>
#include <linux/reboot.h>
#include <string.h>
#include <errno.h>
#include <stdarg.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <math.h>
#include <termios.h>
#define USPLASH_FIFO "/dev/.initramfs/usplash_fifo"
#define MAXTRIES 5
#include "md5.h"
#define DEBUG
int write_and_retry(int fd, char *s) {
int try = 0, ret = 0;
char *end;
#ifdef DEBUG
fprintf(stderr, "-> %s\n", s);
#endif
end = s + strlen(s)+1;
ret = write(fd, s, end - s);
while (s + ret < end && try < MAXTRIES) {
sleep(1);
s += ret;
ret = write(fd, s, strlen(s)+1);
try++;
}
return (s+ret == end ? 0 : 1);
}
void usplash_timeout(int fd, int timeout) {
char *s;
asprintf(&s, "TIMEOUT %d", timeout);
write_and_retry(fd, s);
free(s);
}
void usplash_failure(int fd, char *format, ...) {
char *s, *s1;
va_list argp;
va_start(argp, format);
vasprintf(&s, format, argp);
va_end(argp);
asprintf(&s1, "FAILURE %s", s);
write_and_retry(fd, s1);
free(s);
free(s1);
}
void usplash_text(int fd, char *format, ...) {
char *s, *s1;
va_list argp;
va_start(argp, format);
vasprintf(&s, format, argp);
va_end(argp);
asprintf(&s1, "TEXT %s", s);
write_and_retry(fd, s1);
free(s);
free(s1);
}
void usplash_success(int fd, char *format, ...) {
char *s, *s1;
va_list argp;
va_start(argp, format);
vasprintf(&s, format, argp);
va_end(argp);
asprintf(&s1, "SUCCESS %s", s);
write_and_retry(fd, s1);
free(s);
free(s1);
}
void usplash_progress(int fd, int progress) {
static int prevprogress = -1;
char *s;
if (progress == prevprogress)
return;
prevprogress = progress;
asprintf(&s, "PROGRESS %d", progress);
write_and_retry(fd, s);
free(s);
}
int set_nocanonical_tty(int fd) {
struct termios t;
if (tcgetattr(fd, &t) == -1) {
perror("tcgetattr");
}
t.c_lflag &= ~ICANON;
t.c_cc[VMIN] = 1;
t.c_cc[VTIME] = 0;
return tcsetattr(fd, TCSANOW, &t);
}
int main(int argc, char **argv) {
int pipe_fd, check_fd;
int failed = 0;
FILE *md5_file;
md5_state_t state;
md5_byte_t digest[16];
char hex_output[16*2 + 1];
char *checksum, *checkfile;
ssize_t tsize, csize;
tsize = 0;
csize = 0;
if (argc != 3) {
fprintf(stderr,"Wrong number of arguments\n");
fprintf(stderr,"%s <root directory> <md5sum file>\n", argv[0]);
exit(1);
}
if (chdir(argv[1]) != 0) {
perror("chdir");
exit(1);
}
pipe_fd = open(USPLASH_FIFO, O_WRONLY|O_NONBLOCK);
if (pipe_fd == -1) {
/* We can't really do anything useful here */
exit(1);
}
usplash_progress(pipe_fd, 0);
md5_file = fopen(argv[2], "r");
if (!md5_file) {
perror("fopen md5_file");
exit(1);
}
while (fscanf(md5_file, "%as %as", &checksum, &checkfile) == 2) {
struct stat statbuf;
if (stat(checkfile, &statbuf) == 0) {
tsize += statbuf.st_size;
}
free(checksum);
free(checkfile);
}
rewind(md5_file);
while (fscanf(md5_file, "%as %as", &checksum, &checkfile) == 2) {
char buf[BUFSIZ];
ssize_t rsize;
int i;
md5_init(&state);
usplash_text(pipe_fd, "Checking %s", checkfile);
check_fd = open(checkfile, O_RDONLY);
if (check_fd < 0) {
usplash_timeout(pipe_fd, 300);
usplash_failure(pipe_fd, "%s", strerror(errno));
sleep(10);
}
rsize = read(check_fd, buf, sizeof(buf));
while (rsize > 0) {
csize += rsize;
usplash_progress(pipe_fd, floorl(100*csize/tsize));
md5_append(&state, (const md5_byte_t *)buf, rsize);
rsize = read(check_fd, buf, sizeof(buf));
}
close(check_fd);
md5_finish(&state, digest);
for (i = 0; i < 16; i++)
sprintf(hex_output + i * 2, "%02x", digest[i]);
if (strncmp(hex_output, checksum, strlen(hex_output)) == 0) {
usplash_success(pipe_fd, "OK");
} else {
usplash_failure(pipe_fd, "mismatch");
failed++;
}
free(checksum);
free(checkfile);
}
usplash_text(pipe_fd, "Check finished, %d checksums failed", failed);
usplash_text(pipe_fd, "Press any key to reboot your system");
usplash_timeout(pipe_fd, 0);
set_nocanonical_tty(0);
getchar();
reboot(LINUX_REBOOT_CMD_RESTART);
return 0;
}
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