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Code Issues Releases Activity

burncd(8) doesn't handle signals and interrupting burncd during operation.

Browse Source 
For example, ^C (SIGINT) may leave the drive spinning and locked.
This may also happen if you try to write a too-large image to a disc
and burncd(8) exits with an I/O error.

Add signal handling by doing a CDRIOCFLUSH ioctl to attempt to leave
burner in a sane state when burning is interrupted with SIGHUP, SIGINT,
SIGTERM, or in case an I/O error occurs during write.
Note, that blanking will still continue after interrupt but it seems to
finish correctly even after burncd(8) has quit.

Also, while I'm here bump WARNS to "6".

PR:		48730
Submitted by:	Jaakko Heinonen <jh@saunalahti.fi>
This commit is contained in:
David E. O'Brien 2008-12-19 20:20:14 +00:00
parent d347a0da97
commit 970bfaf67f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=186337
2 changed files with 37 additions and 6 deletions
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2
usr.sbin/burncd/Makefile
View File

@ -3,6 +3,6 @@
PROG= burncd
MAN= burncd.8
WARNS?= 5
WARNS?= 6
.include <bsd.prog.mk>

41
usr.sbin/burncd/burncd.c
View File

@ -29,6 +29,7 @@
*/
#include <unistd.h>
#include <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
@ -67,6 +68,8 @@ int write_file(int fd, struct track_info *);
int roundup_blocks(struct track_info *);
void cue_ent(struct cdr_cue_entry *, int, int, int, int, int, int, int);
void cleanup(int);
void cleanup_flush(void);
void cleanup_signal(int);
void usage(void);
int
@ -157,6 +160,9 @@ main(int argc, char **argv)
global_fd_for_cleanup = fd;
err_set_exit(cleanup);
signal(SIGHUP, cleanup_signal);
signal(SIGINT, cleanup_signal);
signal(SIGTERM, cleanup_signal);
for (arg = 0; arg < argc; arg++) {
if (!strcasecmp(argv[arg], "fixate")) {
@ -319,6 +325,10 @@ main(int argc, char **argv)
if (eject)
if (ioctl(fd, CDIOCEJECT) < 0)
err(EX_IOERR, "ioctl(CDIOCEJECT)");
signal(SIGHUP, SIG_DFL);
signal(SIGINT, SIG_DFL);
signal(SIGTERM, SIG_DFL);
close(fd);
exit(EX_OK);
}
@ -469,8 +479,10 @@ do_DAO(int fd, int test_write, int multi)
err(EX_IOERR, "ioctl(CDRIOCSENDCUE)");
for (i = 0; i < notracks; i++) {
if (write_file(fd, &tracks[i]))
if (write_file(fd, &tracks[i])) {
cleanup_flush();
err(EX_IOERR, "write_file");
}
}
ioctl(fd, CDRIOCFLUSH);
@ -499,8 +511,10 @@ do_TAO(int fd, int test_write, int preemp, int dvdrw)
if (!quiet)
fprintf(stderr, "next writeable LBA %d\n",
tracks[i].addr);
if (write_file(fd, &tracks[i]))
if (write_file(fd, &tracks[i])) {
cleanup_flush();
err(EX_IOERR, "write_file");
}
if (ioctl(fd, CDRIOCFLUSH) < 0)
err(EX_IOERR, "ioctl(CDRIOCFLUSH)");
}
@ -630,9 +644,11 @@ write_file(int fd, struct track_info *track_info)
track_info->block_size;
}
if ((res = write(fd, buf, count)) != count) {
if (res == -1)
fprintf(stderr, "\n%s\n", strerror(errno));
else
if (res == -1) {
fprintf(stderr, "\n");
close(track_info->file);
return errno;
} else
fprintf(stderr, "\nonly wrote %d of %jd"
" bytes\n", res, (intmax_t)count);
break;
@ -692,6 +708,21 @@ cleanup(int dummy __unused)
err(EX_IOERR, "ioctl(CDRIOCSETBLOCKSIZE)");
}
void
cleanup_flush(void)
{
if (ioctl(global_fd_for_cleanup, CDRIOCFLUSH) < 0)
err(EX_IOERR, "ioctl(CDRIOCFLUSH)");
}
void
cleanup_signal(int sig __unused)
{
cleanup_flush();
fprintf(stderr, "\n");
errx(EXIT_FAILURE, "Aborted");
}
void
usage(void)
{