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Fixed a potential blind spot of 1 second in -disk_dev_ino comparison

This commit is contained in:
Thomas Schmitt 2009-04-03 17:20:33 +00:00
parent e3eaea1a4e
commit b4952da4e6
5 changed files with 86 additions and 7 deletions
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6
xorriso/xorriso.1
View File

@ -2,7 +2,7 @@
.\" First parameter, NAME, should be all caps
.\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
.\" other parameters are allowed: see man(7), man(1)
.TH XORRISO 1 "Apr 02, 2009"
.TH XORRISO 1 "Apr 03, 2009"
.\" Please adjust this date whenever revising the manpage.
.\"
.\" Some roff macros, for reference:
@ -684,7 +684,9 @@ See also options -getfattr, -setfattr and above paragraph about xattr.
\fB\-disk_dev_ino\fR "on"|"ino_only"|"off"
Enable or disable processing of recorded file identification numbers
(dev_t and ino_t). They are eventually stored as xattr "isofs.di" and allow
to substantially accelerate file comparison.
to substantially accelerate file comparison. The root node gets a global start
timestamp in "isofs.st". If during comparison a file with younger timestamps
is found in the ISO image, then it is suspected to have inconsistent content.
.br
If device numbers and inode numbers of the disk filesystems are persistent
and if no irregular alterations of timestamps or system clock happen,

34
xorriso/xorriso.c
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@ -1572,6 +1572,7 @@ completed:;
0= ls -l format
1= timestamp format YYYY.MM.DD.hhmmss
2= Wdy Mon Day hh:mm:ss Year
3= Mon Day hh:mm:ss Year
*/
char *Ftimetxt(time_t t, char timetext[40], int flag)
{
@ -1596,6 +1597,10 @@ char *Ftimetxt(time_t t, char timetext[40], int flag)
sprintf(rpt+strlen(rpt), "%s %s %2.2d %2.2d:%2.2d:%2.2d %4.4d",
days[tms.tm_wday], months[tms.tm_mon], tms.tm_mday,
tms.tm_hour, tms.tm_min, tms.tm_sec, 1900+tms.tm_year);
else if (form==3)
sprintf(rpt+strlen(rpt), "%s %2.2d %2.2d:%2.2d:%2.2d %4.4d",
months[tms.tm_mon], tms.tm_mday,
tms.tm_hour, tms.tm_min, tms.tm_sec, 1900+tms.tm_year);
else if (flag&1)
sprintf(rpt+strlen(rpt), "%2d %3s %4.4d %2.2d:%2.2d:%2.2d",
tms.tm_mday, months[tms.tm_mon], 1900+tms.tm_year,
@ -4103,6 +4108,8 @@ int Xorriso_new(struct XorrisO ** xorriso,char *progname, int flag)
m->in_drive_handle= NULL;
m->in_volset_handle= NULL;
m->in_charset= NULL;
m->isofs_st_out= time(0) - 1;
m->isofs_st_in= 0;
m->volset_change_pending= 0;
m->no_volset_present= 0;
m->in_sector_map= NULL;
@ -6772,6 +6779,7 @@ cannot_address:;
bit20= xattr differ
bit21= mismatch of recorded dev,inode
bit22= no recorded dev,inode found in node
bit23= timestamps younger than xorriso->isofs_st_in
@param flag bit0= compare atime
bit1= compare ctime
bit2= check only existence of both file objects
@ -6797,6 +6805,7 @@ int Xorriso_compare_2_files(struct XorrisO *xorriso, char *disk_adr,
char *attrlist1= NULL, *attrlist2= NULL;
struct SplitparT *split_parts= NULL;
int split_count= 0;
time_t stamp;
char part_path[SfileadrL], *part_name;
int partno, total_parts= 0;
@ -7016,6 +7025,11 @@ int Xorriso_compare_2_files(struct XorrisO *xorriso, char *disk_adr,
(*result)|= 1024;
}
}
if(xorriso->isofs_st_in > 0 &&
(xorriso->isofs_st_in <= s2.st_mtime ||
((flag & 1) && xorriso->isofs_st_in <= s2.st_atime) ||
((flag & 2) && xorriso->isofs_st_in <= s2.st_ctime)))
(*result)|= 1 << 23;
if(xorriso->do_aaip & 32) {
/* dev,inode comparison. Eventually skip content comparison */
@ -7026,8 +7040,26 @@ int Xorriso_compare_2_files(struct XorrisO *xorriso, char *disk_adr,
} else if(ret == 0) { /* match */
if((xorriso->do_aaip & 64) && S_ISREG(s1.st_mode) && S_ISREG(s2.st_mode)){
content_shortcut= 1;
if((*result) & (8 | 128 | 256 | 512 | 1024)) {
if((*result) & (8 | 128 | 256 | 512 | 1024 | (1 << 23))) {
(*result)|= (1 << 15); /* content bytes differ */
if(((*result) & (1 << 23)) &&
!((*result) & (8 | 128 | 256 | 512 | 1024))) {
sprintf(respt,
"%s content : node timestamp younger than image timestamp\n", a);
if(!(flag&(1<<31)))
Xorriso_result(xorriso,0);
stamp= s2.st_mtime;
if((flag & 1) && s2.st_atime >= stamp)
stamp= s2.st_atime;
if((flag & 2) && s2.st_ctime >= stamp)
stamp= s2.st_ctime;
sprintf(respt, "%s content : %s > %s diff= %.f s\n",
a, Ftimetxt(stamp, ttx1, 3 << 1),
Ftimetxt(xorriso->isofs_st_in, ttx2, 3 << 1),
((double) stamp) - (double) xorriso->isofs_st_in);
if(!(flag&(1<<31)))
Xorriso_result(xorriso,0);
}
sprintf(respt,
"%s content : assuming inequality due to size or timestamps\n", a);
if(!(flag&(1<<31)))

15
xorriso/xorriso_private.h
View File

@ -101,9 +101,13 @@ struct XorrisO { /* the global context of xorriso */
int do_joliet;
int do_aaip; /* bit0= ACL in , bit1= ACL out , bit2= EA in , bit3= EA out
bit4= record dev,inode , bit5= check dev,inode
bit6= omit content check if dev,inode check is conclusive
int do_aaip; /* bit0= ACL in
bit1= ACL out
bit2= EA in
bit3= EA out
bit4= record dev,inode per node, isofs_st_out in root
bit5= check dev,inode,isofs_st_in
bit6= omit content check if bit5 check is conclusive
bit7= omit dev check with bit5
bit8= store output charset in xattr "isofs.cs"
bit9= allow to set input charset from xattr "isofs.cs"
@ -174,6 +178,11 @@ struct XorrisO { /* the global context of xorriso */
void *in_drive_handle; /* interpreted only by xorrisoburn.c */
void *in_volset_handle; /* interpreted only by xorrisoburn.c */
char *in_charset; /* The charset to interpret the filename bytes */
time_t isofs_st_out; /* A time point at least 1 second before image
composition began. To be stored with image as
xattr "isofs.st". */
time_t isofs_st_in; /* That time point as read from "isofs.st" of the
loaded image. */
int volset_change_pending; /* whether -commit would make sense */
int no_volset_present; /* set to 1 on first failure */

2
xorriso/xorriso_timestamp.h
View File

@ -1 +1 @@
#define Xorriso_timestamP "2009.04.02.162530"
#define Xorriso_timestamP "2009.04.03.172034"

36
xorriso/xorrisoburn.c
View File

@ -527,8 +527,12 @@ int Xorriso_aquire_drive(struct XorrisO *xorriso, char *adr, int flag)
struct burn_drive *drive, *out_drive, *in_drive;
enum burn_disc_status state;
IsoImage *volset = NULL;
IsoNode *root_node;
struct isoburn_read_opts *ropts= NULL;
char libburn_adr[SfileadrL], *boot_fate, *sev;
size_t value_length;
char *value= NULL;
double num;
static int no_rr_or_joliet= 0;
@ -541,6 +545,8 @@ int Xorriso_aquire_drive(struct XorrisO *xorriso, char *adr, int flag)
ret= Xorriso_give_up_drive(xorriso, (flag&3)|8);
if(ret<=0)
return(ret);
if(flag & 1)
xorriso->isofs_st_out= time(0) - 1;
ret= Xorriso_auto_driveadr(xorriso, adr, libburn_adr, 0);
if(ret <= 0)
@ -778,6 +784,21 @@ int Xorriso_aquire_drive(struct XorrisO *xorriso, char *adr, int flag)
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "NOTE", 0);
Xorriso_record_boot_info(xorriso, 0);
}
if(flag & 1) {
/* Look for isofs.st and put it into xorriso->isofs_st_in */;
root_node= (IsoNode *) iso_image_get_root(volset);
ret= iso_node_lookup_attr(root_node, "isofs.st", &value_length, &value, 0);
if(ret > 0) {
if(value_length > 0) {
sscanf(value, "%lf", &num);
if(num > 0)
xorriso->isofs_st_in= num;
}
free(value);
}
}
if(!(flag&32)) {
Xorriso_toc(xorriso, 1 | 8);
if(xorriso->loaded_volid[0]!=0) {
@ -845,6 +866,8 @@ int Xorriso_give_up_drive(struct XorrisO *xorriso, int flag)
xorriso->in_volset_handle= NULL;
Sectorbitmap_destroy(&(xorriso->in_sector_map), 0);
xorriso->loaded_volid[0]= 0;
xorriso->isofs_st_out= time(0) - 1;
xorriso->isofs_st_in= 0;
xorriso->volset_change_pending= 0;
xorriso->no_volset_present= 0;
xorriso->loaded_boot_bin_lba= 0;
@ -1314,6 +1337,19 @@ int Xorriso_write_session(struct XorrisO *xorriso, int flag)
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "NOTE", 0);
}
}
if(xorriso->do_aaip & 16) {
/* Overwrite isofs.st of root node by xorriso->isofs_st_out */
char *name= "isofs.st";
char timestamp[16], *value= timestamp;
size_t value_length;
sprintf(timestamp, "%.f", (double) xorriso->isofs_st_out);
value_length= strlen(timestamp);
Xorriso_setfattr(xorriso, NULL, "/", (size_t) 1, &name,
&value_length, &value, 2 | 8);
}
isoburn_igopt_set_level(sopts, 3);
isoburn_igopt_set_extensions(sopts, 1 | ((!!xorriso->do_joliet)<<1) |
((!!(xorriso->do_aaip & (2 | 8 | 16 | 256))) << 5));