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libisoburn/xorriso/cmp_update.c

1046 lines
33 KiB

/* xorriso - creates, loads, manipulates and burns ISO 9660 filesystem images.
Copyright 2007-2019 Thomas Schmitt, <scdbackup@gmx.net>
Provided under GPL version 2 or later.
This file contains the implementation of actions which compare or update
files between disk filesystem and ISO filesystem.
*/
#ifdef HAVE_CONFIG_H
#include "../config.h"
#endif
#include <ctype.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <time.h>
#include <fcntl.h>
#include <errno.h>
#include <pwd.h>
#include <grp.h>
/* O_BINARY is needed for Cygwin but undefined elsewhere */
#ifndef O_BINARY
#define O_BINARY 0
#endif
#include "xorriso.h"
#include "xorriso_private.h"
#include "xorrisoburn.h"
/*
@param result Bitfield indicationg type of mismatch
bit11= cannot open regular disk file
bit12= cannot open iso file
bit13= early eof of disk file
bit14= early eof of iso file
bit15= content bytes differ
@param flag bit0= mtimes of both file objects are equal
bit29= do not issue pacifier messages
bit31= do not issue result messages
@return >0 ok , <=0 error
*/
int Xorriso_compare_2_contents(struct XorrisO *xorriso, char *common_adr,
char *disk_adr, off_t disk_size,
off_t offset, off_t bytes,
char *iso_adr, off_t iso_size,
int *result, int flag)
{
int fd1= -1, ret, r1, r2, done, wanted, i, was_error= 0, use_md5= 0;
void *stream2= NULL;
off_t r1count= 0, r2count= 0, diffcount= 0, first_diff= -1;
char *respt, *buf1= NULL, *buf2= NULL, offset_text[80];
char disk_md5[16], iso_md5[16];
void *ctx= NULL;
int buf_size= 32 * 1024;
double dcount;
Xorriso_alloc_meM(buf1, char, buf_size);
Xorriso_alloc_meM(buf2, char, buf_size);
respt= xorriso->result_line;
fd1= open(disk_adr, O_RDONLY | O_BINARY);
if(fd1==-1) {
sprintf(respt, "- %s (DISK) : cannot open() : %s\n",
disk_adr, strerror(errno));
cannot_address:;
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
(*result)|= 2048;
{ret= 0; goto ex;}
}
if(offset>0)
if(lseek(fd1, offset, SEEK_SET)==-1) {
sprintf(respt, "- %s (DISK) : cannot lseek(%.f) : %s\n",
disk_adr, (double) offset, strerror(errno));
close(fd1);
goto cannot_address;
}
if(xorriso->do_md5 & 16) {
use_md5= 1;
ret= Xorriso_is_plain_image_file(xorriso, NULL, iso_adr, 0);
if(ret <= 0)
ret= 0; /* (reverse) filtered files are likely not to match their MD5 */
else
ret= Xorriso_get_md5(xorriso, NULL, iso_adr, iso_md5, 1);
if(ret <= 0)
use_md5= 0;
else {
ret= Xorriso_md5_start(xorriso, &ctx, 0);
if(ret <= 0)
use_md5= 0;
}
}
if (! use_md5) {
ret= Xorriso_iso_file_open(xorriso, iso_adr, NULL, &stream2, 0);
if(ret<=0) {
sprintf(respt, "- %s (ISO) : cannot open() file in ISO image\n",iso_adr);
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
close(fd1);
(*result)|= 4096;
{ret= 0; goto ex;}
}
}
done= 0;
while(!done) {
wanted= buf_size;
if(r1count+offset+wanted>disk_size)
wanted= disk_size-r1count-offset;
if(r1count+wanted>bytes)
wanted= bytes-r1count;
r1= 0;
while(wanted>0) {
ret= read(fd1, buf1, wanted);
if(ret<=0)
break;
wanted-= ret;
r1+= ret;
}
wanted= buf_size;
if(r2count+wanted>iso_size)
wanted= iso_size-r2count;
/*
if(r2count+wanted>bytes)
wanted= bytes-r2count;
*/
if(use_md5)
r2= r1;
else if(wanted>0)
r2= Xorriso_iso_file_read(xorriso, stream2, buf2, wanted, 0);
else
r2= 0;
if(r1<0 || r2<0)
was_error= 1;
if(r1<=0 && r2<=0)
break;
if(r1<=0) {
if(r1<0)
r1= 0;
if(disk_size > r1count + r1 + offset) {
sprintf(respt, "- %s (DISK) : early EOF after %.f bytes\n",
disk_adr, (double) r1count);
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
(*result)|= 8196;
}
(*result)|= (1<<15);
}
r1count+= r1;
if(r2<=0 || r2<r1) {
if(r2<0)
r2= 0;
if(iso_size > r2count + r2) {
sprintf(respt, "- %s (ISO) : early EOF after %.f bytes\n",
iso_adr, (double) r2count);
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
(*result)|= (1<<14);
}
(*result)|= (1<<15);
done= 1;
}
if(r2>r1) {
if(disk_size > r1count + r1 + offset) {
sprintf(respt, "- %s (DISK) : early EOF after %.f bytes\n",
disk_adr, (double) r1count);
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
(*result)|= 8196;
}
(*result)|= (1<<15);
done= 1;
}
r2count+= r2;
if(r1>r2)
r1= r2;
if(use_md5) {
Xorriso_md5_compute(xorriso, ctx, buf1, r1, 0);
} else {
for(i= 0; i<r1; i++) {
if(buf1[i]!=buf2[i]) {
if(first_diff<0)
first_diff= r1count - r1 + i;
diffcount++;
}
}
}
if(!(flag&(1<<29))) {
xorriso->pacifier_count+= r1;
xorriso->pacifier_byte_count+= r1;
if(flag&(1u<<31))
Xorriso_pacifier_callback(xorriso, "content bytes read",
xorriso->pacifier_count, 0, "", 8);
else
Xorriso_pacifier_callback(xorriso, "bytes", xorriso->pacifier_count, 0,
"", 8 | 1<<6);
}
}
if(use_md5) {
ret= Xorriso_md5_end(xorriso, &ctx, disk_md5, 0);
if(ret <= 0) {
*result |= (1 << 15);
ret= -1; goto ex;
}
for(i= 0; i < 16; i++)
if(iso_md5[i] != disk_md5[i])
break;
if(i < 16 ) {
offset_text[0]= 0;
if(offset>0)
sprintf(offset_text, "%.f+", (double) offset);
sprintf(respt, "%s %s : differs by MD5 sums.\n",
common_adr, (flag&1 ? "CONTENT": "content"));
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
(*result)|= (1<<15);
}
} else if(diffcount>0 || r1count!=r2count) {
if(first_diff<0)
first_diff= (r1count>r2count ? r2count : r1count);
offset_text[0]= 0;
if(offset>0)
sprintf(offset_text, "%.f+", (double) offset);
if(r1count > r2count)
dcount= diffcount + (r1count - r2count);
else
dcount= diffcount + (r2count - r1count);
sprintf(respt, "%s %s : differs by at least %.f bytes. First at %s%.f\n",
common_adr, (flag&1 ? "CONTENT": "content"),
dcount, offset_text, (double) first_diff);
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
(*result)|= (1<<15);
}
if(fd1!=-1)
close(fd1);
if(! use_md5)
Xorriso_iso_file_close(xorriso, &stream2, 0);
if(was_error)
{ret= -1; goto ex;}
ret= 1;
ex:;
if(ctx != NULL)
Xorriso_md5_end(xorriso, &ctx, disk_md5, 0);
Xorriso_free_meM(buf1);
Xorriso_free_meM(buf2);
return(ret);
}
/*
@param result Bitfield indicationg type of mismatch
bit0= disk_adr not existing
bit1= iso_adr not existing
bit2= access permissions
bit3= file type
bit4= user id
bit5= group id
bit6= minor, major with device file
bit7= size
bit8= mtime
bit9= atime
bit10= ctime
bit11= cannot open regular disk file
bit12= cannot open iso file
bit13= early eof of disk file
bit14= early eof of iso file
bit15= content bytes differ
bit16= symbolic link on disk pointing to dir, dir in iso
bit17= file chunks detected and compared
bit18= incomplete chunk collection encountered
bit19= ACL differs (this condition sets also bit2)
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
bit24= hardlink split
bit25= hardlink fusion
@param flag bit0= compare atime
bit1= compare ctime
bit2= check only existence of both file objects
count one or both missing as "difference"
bit26= do not issue message about missing disk file
bit27= for Xorriso_path_is_excluded(): bit0
bit28= examine eventual disk_path link target rather than link
bit29= do not issue pacifier messages
bit30= omit adr_common_tail in report messages
bit31= do not issue result messages
@return 1=files match properly , 0=difference detected , -1=error
*/
int Xorriso_compare_2_files(struct XorrisO *xorriso, char *disk_adr,
char *iso_adr, char *adr_common_tail,
int *result, int flag)
{
struct stat s1, s2, stbuf;
int ret, missing= 0, is_split= 0, i, was_error= 0, diff_count= 0;
int content_shortcut= 0, mask;
char *respt;
char *a= NULL;
char ttx1[40], ttx2[40];
char *a1_acl= NULL, *a2_acl= NULL, *d1_acl= NULL, *d2_acl= NULL;
char *attrlist1= NULL, *attrlist2= NULL;
struct SplitparT *split_parts= NULL;
int split_count= 0;
time_t stamp;
char *part_path= NULL, *part_name;
int partno, total_parts= 0;
off_t offset, bytes, total_bytes;
Xorriso_alloc_meM(a, char, 5*SfileadrL);
Xorriso_alloc_meM(part_path, char, SfileadrL);
*result= 0;
respt= xorriso->result_line;
if(!(xorriso->disk_excl_mode&8)) {
ret= Xorriso_path_is_excluded(xorriso, disk_adr, 2 | !!(flag&(1<<27)));
if(ret>0) {
strcpy(respt, "? ");
Text_shellsafe(disk_adr, respt, 1);
sprintf(respt + strlen(respt), " (DISK) : excluded by %s\n",
(ret==1 ? "-not_paths" : "-not_leaf"));
if(! (flag & ((1u << 31) | (1 << 26))))
Xorriso_result(xorriso,0);
missing= 1;
(*result)|= 1;
}
}
if(!missing) {
if(flag&(1<<28))
ret= stat(disk_adr, &s1);
else
ret= lstat(disk_adr, &s1);
if(ret==-1) {
strcpy(respt, "? ");
Text_shellsafe(disk_adr, respt, 1);
sprintf(respt + strlen(respt),
" (DISK) : cannot lstat() : %s\n", strerror(errno));
if(! (flag & ((1u << 31) | (1 << 26))))
Xorriso_result(xorriso,0);
missing= 1;
(*result)|= 1;
}
}
if(missing)
strcpy(a, "?");
else
strcpy(a, Ftypetxt(s1.st_mode, 1));
strcat(a, " ");
if(adr_common_tail[0])
Text_shellsafe(adr_common_tail, a, 1);
else {
Text_shellsafe(disk_adr, a+strlen(a), 0);
strcat(a, " (DISK)");
/*
strcat(a, "'.'");
*/
}
strcat(a, " :");
if(flag&(1<<30))
a[0]= 0;
ret= Xorriso_iso_lstat(xorriso, iso_adr, &s2, 0);
if(ret<0) {
strcpy(respt, "? ");
Text_shellsafe(iso_adr, respt, 1);
strcat(respt, " (ISO) : cannot find this file in ISO image\n");
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
missing= 1;
(*result)|= 2;
}
if((flag&4)||missing)
{ret= !missing; goto ex;}
/* Splitfile parts */
if((S_ISREG(s1.st_mode) || S_ISBLK(s1.st_mode)) && S_ISDIR(s2.st_mode)) {
is_split= Xorriso_identify_split(xorriso, iso_adr, NULL, &split_parts,
&split_count, &s2, 0);
if(is_split>0)
(*result)|= (1<<17);
else
is_split= 0;
}
/* Attributes */
if(s1.st_mode != s2.st_mode) {
if((s1.st_mode&~S_IFMT)!=(s2.st_mode&~S_IFMT)) {
sprintf(respt, "%s st_mode : %7.7o <> %7.7o\n",
a, (unsigned int) (s1.st_mode & ~S_IFMT),
(unsigned int) (s2.st_mode & ~S_IFMT));
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
(*result)|= 4;
}
if((s1.st_mode&S_IFMT)!=(s2.st_mode&S_IFMT)) {
sprintf(respt, "%s type : %s <> %s\n",
a, Ftypetxt(s1.st_mode, 0), Ftypetxt(s2.st_mode, 0));
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
(*result)|= 8;
if((s1.st_mode&S_IFMT) == S_IFLNK) {
/* check whether link target type matches */
ret= stat(disk_adr, &stbuf);
if(ret!=-1)
if(S_ISDIR(stbuf.st_mode) && S_ISDIR(s2.st_mode))
(*result)|= (1<<16);
}
}
}
/* ACL */
if(xorriso->do_aaip & 3) {
Xorriso_local_getfacl(xorriso, disk_adr, &a1_acl,
16 | ((flag & (1 << 28)) >> 23));
if(S_ISDIR(s1.st_mode))
Xorriso_local_getfacl(xorriso, disk_adr, &d1_acl, 1);
ret= Xorriso_getfacl(xorriso, NULL, iso_adr, &a2_acl, 1 | 4 | 16);
if(ret < 0)
goto ex;
if(S_ISDIR(s1.st_mode)) {
ret= Xorriso_getfacl(xorriso, NULL, iso_adr, &d2_acl, 1 | 8);
if(ret < 0)
goto ex;
}
ret= Compare_text_lines(a1_acl, a2_acl, &diff_count, 0);
if(ret < 0)
goto ex;
if(ret == 0)
(*result)|= 4 | (1 << 19);
ret= Compare_text_lines(d1_acl, d2_acl, &diff_count, 1);
if(ret < 0)
goto ex;
if(ret == 0)
(*result)|= 4 | (1 << 19);
if((*result) & (1 << 19)) {
sprintf(respt, "%s ACL : %d difference%s\n",
a, diff_count, diff_count == 1 ? "" : "s");
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
}
}
/* xattr */
if(xorriso->do_aaip & 12) {
ret= Xorriso_getfattr(xorriso, NULL, disk_adr, &attrlist1,
1 | 2 | ((flag & (1 << 28)) >> 23));
if(ret < 0)
goto ex;
ret= Xorriso_getfattr(xorriso, NULL, iso_adr, &attrlist2, 1);
if(ret < 0)
goto ex;
ret= Compare_text_lines(attrlist1, attrlist2, &diff_count, 0);
if(ret < 0)
goto ex;
if(ret == 0) {
(*result)|= (1 << 20);
sprintf(respt, "%s xattr : %d difference%s\n",
a, diff_count, diff_count == 1 ? "" : "s");
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
}
}
if(s1.st_uid != s2.st_uid) {
sprintf(respt, "%s st_uid : %lu <> %lu\n", a,
(unsigned long) s1.st_uid, (unsigned long) s2.st_uid);
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
(*result)|= 16;
}
if(s1.st_gid != s2.st_gid) {
sprintf(respt, "%s st_gid : %lu <> %lu\n", a,
(unsigned long) s1.st_gid, (unsigned long) s2.st_gid);
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
(*result)|= 32;
}
if((S_ISCHR(s1.st_mode) && S_ISCHR(s2.st_mode)) ||
(S_ISBLK(s1.st_mode) && S_ISBLK(s2.st_mode))) {
if(s1.st_rdev != s2.st_rdev) {
sprintf(respt, "%s %s st_rdev : %lu <> %lu\n", a,
(S_ISCHR(s1.st_mode) ? "S_IFCHR" : "S_IFBLK"),
(unsigned long) s1.st_rdev, (unsigned long) s1.st_rdev);
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
(*result)|= 64;
}
}
if((!(xorriso->do_aaip & 32)) &&
S_ISREG(s2.st_mode) && s1.st_size != s2.st_size) {
sprintf(respt, "%s st_size : %.f <> %.f diff= %.f\n",
a, (double) s1.st_size, (double) s2.st_size,
((double) s1.st_size) - (double) s2.st_size);
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
(*result)|= 128;
}
if(s1.st_mtime != s2.st_mtime) {
sprintf(respt, "%s st_mtime : %s <> %s diff= %.f s\n",
a, Ftimetxt(s1.st_mtime, ttx1, 0),
Ftimetxt(s2.st_mtime, ttx2, 0),
((double) s1.st_mtime) - (double) s2.st_mtime);
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
(*result)|= 256;
}
if(flag&1) {
if(s1.st_atime != s2.st_atime) {
sprintf(respt, "%s st_atime : %s <> %s diff= %.f s\n",
a, Ftimetxt(s1.st_atime, ttx1, 0),
Ftimetxt(s2.st_atime, ttx2, 0),
((double) s1.st_atime) - (double) s2.st_atime);
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
(*result)|= 512;
}
}
if(flag&2) {
if(s1.st_ctime != s2.st_ctime) {
sprintf(respt, "%s st_ctime : %s <> %s diff= %.f s\n",
a, Ftimetxt(s1.st_ctime, ttx1, 0),
Ftimetxt(s2.st_ctime, ttx2, 0),
((double) s1.st_ctime) - (double) s2.st_ctime);
if(!(flag&(1u<<31)))
Xorriso_result(xorriso,0);
(*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) || !(xorriso->ino_behavior & 2)) {
/* dev,inode comparison.
For skipping content comparison or for hardlink detection.
*/
ret= Xorriso_record_dev_inode(xorriso, "", s1.st_dev, s1.st_ino, NULL,
iso_adr, 1 | 2 | ((flag & (1 << 28)) >> 23) | (xorriso->do_aaip & 128));
if(ret < 0) {
ret= -1; goto ex;
} else if(ret == 0) { /* match */
if((xorriso->do_aaip & 64) && S_ISREG(s1.st_mode) && S_ISREG(s2.st_mode)){
if(xorriso->do_aaip & 32)
content_shortcut= 1;
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((xorriso->do_aaip & 32) && !(flag&(1u<<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((xorriso->do_aaip & 32) && !(flag&(1u<<31)))
Xorriso_result(xorriso,0);
}
sprintf(respt,
"%s content : assuming inequality due to size or timestamps\n", a);
if((xorriso->do_aaip & 32) && !(flag&(1u<<31)))
Xorriso_result(xorriso,0);
}
}
} else if(ret == 1) { /* mismatch */
(*result)|= (1 << 21);
sprintf(respt, "%s dev_ino : differing\n", a);
if((xorriso->do_aaip & 32) && !(flag&(1u<<31)))
Xorriso_result(xorriso,0);
if((xorriso->do_aaip & 64) && S_ISREG(s1.st_mode) && S_ISREG(s2.st_mode)){
if(xorriso->do_aaip & 32)
content_shortcut= 1;
(*result)|= (1 << 15); /* content bytes differ */
sprintf(respt,
"%s content : assuming inequality after dev_ino mismatch\n", a);
if((xorriso->do_aaip & 32) && !(flag&(1u<<31)))
Xorriso_result(xorriso,0);
}
} else {
sprintf(respt, "%s dev_ino : no dev_ino stored with image node\n", a);
if((xorriso->do_aaip & 32) && !(flag&(1u<<31)))
Xorriso_result(xorriso,0);
(*result)|= (1 << 22);
}
}
if(S_ISREG(s1.st_mode) && S_ISREG(s2.st_mode) && !content_shortcut) {
/* Content */
if(is_split) {
for(i= 0; i<split_count; i++) {
Splitparts_get(split_parts, i, &part_name, &partno, &total_parts,
&offset, &bytes, &total_bytes, 0);
strcpy(part_path, iso_adr);
if(Sfile_add_to_path(part_path, part_name, 0)<=0) {
Xorriso_much_too_long(xorriso, strlen(iso_adr)+strlen(part_name)+1,
2);
{ret= -1; goto ex;}
}
ret= Xorriso_iso_lstat(xorriso, part_path, &stbuf, 0);
if(ret<0)
continue;
ret= Xorriso_compare_2_contents(xorriso, a, disk_adr, s1.st_size,
offset, bytes,
part_path, stbuf.st_size, result,
(s1.st_mtime==s2.st_mtime) | (flag&((1<<29)|(1u<<31))));
if(ret<0)
was_error= 1;
}
if(total_parts>0 && split_count!=total_parts) {
sprintf(xorriso->info_text,
"- %s/* (ISO) : Not all split parts present (%d of %d)\n",
iso_adr, split_count, total_parts);
if(!(flag&(1u<<31)))
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "NOTE", 1);
(*result)|= 1<<18;
}
} else {
ret= Xorriso_compare_2_contents(xorriso, a, disk_adr, s1.st_size,
(off_t) 0, s1.st_size,
iso_adr, s2.st_size, result,
(s1.st_mtime==s2.st_mtime) | (flag&((1<<29)|(1u<<31))));
if(ret<0)
was_error= 1;
}
}
if(was_error)
ret= -1;
else {
mask= ~((1 << 17) | (1 << 18) | (1 << 22) | (1 << 23));
if(xorriso->do_aaip & 32)
mask|= 1 << 22;
ret= (((*result) & mask)==0);
}
ex:;
if(split_parts!=NULL)
Splitparts_destroy(&split_parts, split_count, 0);
Xorriso_local_getfacl(xorriso, disk_adr, &a1_acl, 1 << 15);
Xorriso_local_getfacl(xorriso, disk_adr, &d1_acl, 1 << 15);
if(a2_acl != NULL)
free(a2_acl);
if(d2_acl != NULL)
free(d2_acl);
if(attrlist1 != NULL)
free(attrlist1);
if(attrlist2 != NULL)
free(attrlist2);
Xorriso_free_meM(part_path);
Xorriso_free_meM(a);
return(ret);
}
int Xorriso_pfx_disk_path(struct XorrisO *xorriso, char *iso_path,
char *iso_prefix, char *disk_prefix,
char disk_path[SfileadrL], int flag)
{
int ret;
char *adrc= NULL;
Xorriso_alloc_meM(adrc, char, SfileadrL);
if(strncmp(iso_path, iso_prefix, strlen(iso_prefix))!=0)
{ret= -1; goto ex;}
if(strlen(disk_prefix) + strlen(iso_path) - strlen(iso_prefix)+1 >= SfileadrL)
{ret= -1; goto ex;}
if(iso_path[strlen(iso_prefix)] == '/')
strcpy(adrc, iso_path + strlen(iso_prefix) + 1);
else
strcpy(adrc, iso_path + strlen(iso_prefix));
ret= Xorriso_make_abs_adr(xorriso, disk_prefix, adrc, disk_path, 4 | 8);
if(ret <= 0)
goto ex;
ret= 1;
ex:;
Xorriso_free_meM(adrc);
return(ret);
}
/* @param boss_iter Opaque handle to be forwarded to actions in ISO image
Set to NULL if calling this function from outside ISO world
@param flag bit0= update rather than compare
bit1= find[ix] is in recursion
bit2= update_merge : do not delete but mark visited and found
@return <=0 error, 1= ok , 2= iso_path was deleted
3=ok, do not dive into directory (e.g. because it is a split file)
*/
int Xorriso_find_compare(struct XorrisO *xorriso, void *boss_iter, void *node,
char *iso_path, char *iso_prefix, char *disk_prefix,
int flag)
{
int ret, result, uret, follow_links, deleted= 0;
char *disk_path= NULL;
Xorriso_alloc_meM(disk_path, char, SfileadrL);
ret= Xorriso_pfx_disk_path(xorriso, iso_path, iso_prefix, disk_prefix,
disk_path, 0);
if(ret <= 0)
goto ex;
/* compare exclusions against disk_path resp. leaf name */
if(xorriso->disk_excl_mode&8)
ret= Xorriso_path_is_excluded(xorriso, disk_path, !(flag&2));
else
ret= 0;
if(ret<0)
goto ex;
if(ret>0)
{ret= 3; goto ex;}
follow_links= (xorriso->do_follow_links ||
(xorriso->do_follow_param && !(flag&2))) <<28;
ret= Xorriso_compare_2_files(xorriso, disk_path, iso_path, "", &result,
2 | follow_links | ((!!(flag & 4)) << 26)
| ((!(flag&2))<<27) | (((unsigned)(flag&1))<<31));
/* was once: | ((!(flag&1))<<29) */
if(ret<xorriso->find_compare_result)
xorriso->find_compare_result= ret;
if(flag&1) {
if(ret<0)
if(Xorriso_eval_problem_status(xorriso, ret, 1|2)<0)
goto ex;
if(ret > 0)
result= 0;
uret= Xorriso_update_interpreter(xorriso, boss_iter, node, result,
disk_path, iso_path,
((flag & 2) << 1) | ((flag & 4) >> 1));
if(uret<=0)
ret= 0;
if(uret==2)
deleted= 1;
}
if(ret<0)
goto ex;
if(deleted)
{ret= 2; goto ex;}
if(result&(1<<17))
{ret= 3; goto ex;}
ex:;
Xorriso_free_meM(disk_path);
return(ret);
}
/* @param boss_iter Opaque handle to be forwarded to actions in ISO image
Set to NULL if calling this function from outside ISO world
@param flag bit0= widen hardlink sibling:
Do not call Xorriso_hardlink_update()
Overwrite exactly if normal mode would not,
else do nothing
bit1= do not delete files which are not found under
disk_path, but rather mark visited files and mark
files which were found.
bit2= -follow: this is not a command parameter
@return <=0 error, 1= ok , 2= iso_rr_path node object has been deleted ,
3= no action taken
*/
int Xorriso_update_interpreter(struct XorrisO *xorriso,
void *boss_iter, void *node,
int compare_result, char *disk_path,
char *iso_rr_path, int flag)
{
int ret= 1, deleted= 0, is_split= 0, i, loop_count, late_hardlink_update= 0;
struct stat stbuf;
struct SplitparT *split_parts= NULL;
int split_count= 0;
char *part_path= NULL, *part_name;
int partno, total_parts, new_total_parts, added_overwrote= 0;
off_t offset, bytes, total_bytes, disk_size, first_bytes, du_size;
if((compare_result&3)==3) {
sprintf(xorriso->info_text, "Missing on disk and in ISO: disk_path ");
Text_shellsafe(disk_path, xorriso->info_text, 1);
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "SORRY", 1);
xorriso->find_compare_result= -1;
ret= 3; goto ex;
}
Xorriso_alloc_meM(part_path, char, SfileadrL);
if((flag & 2) && !(compare_result & 2)) {
ret= Xorriso_mark_update_merge(xorriso, iso_rr_path, node,
!(compare_result & 1));
if(ret <= 0)
goto ex;
}
if(compare_result == 0)
{ret= 1; goto ex;}
if(compare_result&((1<<11)|(1<<13))) {
if(flag & 1)
{ret= 3; goto ex;}
/* cannot open regular disk file, early eof of disk file */
sprintf(xorriso->info_text, "Problems with reading disk file ");
Text_shellsafe(disk_path, xorriso->info_text, 1);
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 1);
xorriso->find_compare_result= -1;
ret= 1; goto ex;
}
xorriso->info_text[0]= 0;
is_split= !!(compare_result & (1<<17));
if((!(xorriso->ino_behavior & 2)) && (compare_result & (2 | (3 << 21))) &&
!(flag & 1)) {
if(compare_result & 2) {
/* File is not yet in image */
late_hardlink_update= 1;
} else {
/* Hard link relation has changed resp. was not recorded. */
ret= Xorriso_hardlink_update(xorriso, &compare_result,
disk_path, iso_rr_path,
(flag & 4) | ((compare_result >> 21) & 2));
if(ret < 0)
goto ex;
if(ret == 2)
{ret= 1; goto ex;}
}
}
if(compare_result&(8|64)) {
/* file type, minor+major with device file */
if(flag & 1)
{ret= 3; goto ex;}
ret= Xorriso_rmi(xorriso, boss_iter, (off_t) 0, iso_rr_path, 1); /* rm_r */
if(ret>0) {
deleted= 1;
ret= Xorriso_graft_in(xorriso, boss_iter, disk_path, iso_rr_path,
(off_t) 0, (off_t) 0, 2|(flag&4));
if(ret <= 0)
goto ex;
if(flag & 2) {
ret= Xorriso_mark_update_merge(xorriso, iso_rr_path, NULL, 1);
if(ret <= 0)
goto ex;
}
}
sprintf(xorriso->info_text, "Deleted and re-added ");
} else if(compare_result&(1)) {
delete:;
/* disk_adr not existing */
if(!(flag & 2)) {
ret= Xorriso_rmi(xorriso, boss_iter, (off_t) 0, iso_rr_path, 1);
deleted= 1;
sprintf(xorriso->info_text, "Deleted ");
}
} else if(compare_result&(2|128|(1<<12)|(1<<14)|(1<<15))) {
/* iso_adr not existing, size, cannot open iso file, early eof of iso file
content bytes differ */
if(flag & 1)
{ret= 3; goto ex;}
overwrite:;
if(is_split) {
ret= Xorriso_identify_split(xorriso, iso_rr_path, NULL,
&split_parts, &split_count, &stbuf, 0);
if(ret<=0)
{ret= -1; goto ex;} /* (should not happen) */
ret= lstat(disk_path, &stbuf);
if(ret==-1)
goto delete;
disk_size= stbuf.st_size;
Splitparts_get(split_parts, 0, &part_name, &partno, &total_parts,
&offset, &first_bytes, &total_bytes, 0);
new_total_parts= disk_size/first_bytes;
if(disk_size % first_bytes)
new_total_parts++;
loop_count= split_count;
/* If disk file grew over part limit and all parts are present:
add new parts */
if(new_total_parts > total_parts && split_count == total_parts)
loop_count= new_total_parts;
for(i= 0; i<loop_count; i++) {
if(i<split_count) {
/* Delete old part */
Splitparts_get(split_parts, i, &part_name, &partno, &total_parts,
&offset, &bytes, &total_bytes, 0);
strcpy(part_path, iso_rr_path);
if(Sfile_add_to_path(part_path, part_name, 0)<=0) {
Xorriso_much_too_long(xorriso,
strlen(iso_rr_path)+strlen(part_path)+1, 2);
{ret= -1; goto ex;}
}
ret= Xorriso_rmi(xorriso, NULL, (off_t) 0, part_path, 1);
if(ret<=0)
goto ex;
deleted= 1;
} else {
partno= i+1;
offset= i*first_bytes;
bytes= first_bytes;
}
if(disk_size<=offset)
continue;
/* Insert new part */
if(strlen(part_path)+160>SfileadrL) {
Xorriso_much_too_long(xorriso, strlen(part_path)+160, 2);
ret= 0; goto ex;
}
Splitpart__compose(part_path+strlen(iso_rr_path)+1, partno,
new_total_parts, offset, first_bytes, disk_size, 0);
ret= Xorriso_graft_in(xorriso, boss_iter, disk_path, part_path,
offset, bytes, 2|(flag&4)|8|128);
if(ret<=0)
goto ex;
}
/* Copy file attributes to iso_rr_path, augment r-perms by x-perms */
ret= Xorriso_copy_properties(xorriso, disk_path, iso_rr_path, 2 | 4);
if(ret<=0)
goto ex;
} else {
ret= Xorriso_graft_in(xorriso, boss_iter, disk_path, iso_rr_path,
(off_t) 0, (off_t) 0, 2|(flag&4));
if(ret>0 && !(compare_result&2))
deleted= 1;
}
if(late_hardlink_update) {
/* Handle eventual hardlink siblings of newly created file */
ret= Xorriso_hardlink_update(xorriso, &compare_result,
disk_path, iso_rr_path, 1 | (flag & 4));
if(ret < 0)
goto ex;
}
if(flag & 2) {
ret= Xorriso_mark_update_merge(xorriso, iso_rr_path, NULL, 1);
if(ret <= 0)
goto ex;
}
if(flag & 1) {
sprintf(xorriso->info_text, "Widened hard link ");
} else {
sprintf(xorriso->info_text, "Added/overwrote ");
added_overwrote= 1;
}
} else if(compare_result&(4|16|32|256|512|1024|(1<<19)|(1<<20)|(1<<22))) {
/* access permissions, user id, group id, mtime, atime, ctime, ACL, xattr,
dev_ino missing */
if(flag & 1)
goto overwrite;
if(is_split) {
ret= Xorriso_identify_split(xorriso, iso_rr_path, NULL,
&split_parts, &split_count, &stbuf, 0);
if(ret<=0)
{ret= -1; goto ex;} /* (should not happen) */
for(i= 0; i<split_count; i++) {
Splitparts_get(split_parts, i, &part_name, &partno, &total_parts,
&offset, &bytes, &total_bytes, 0);
strcpy(part_path, iso_rr_path);
if(Sfile_add_to_path(part_path, part_name, 0)<=0) {
Xorriso_much_too_long(xorriso,
strlen(iso_rr_path)+strlen(part_path)+1, 2);
{ret= -1; goto ex;}
}
ret= Xorriso_copy_properties(xorriso, disk_path, part_path,
4 * !(compare_result & (1<<21)));
/* do not update eventually mismatching dev_ino */
if(ret<=0)
goto ex;
}
/* Copy file attributes to iso_rr_path, augment r-perms by x-perms */
ret= Xorriso_copy_properties(xorriso, disk_path, iso_rr_path, 2 | 4);
if(ret<=0)
goto ex;
} else
ret= Xorriso_copy_properties(xorriso, disk_path, iso_rr_path, 4);
sprintf(xorriso->info_text, "Adjusted attributes of ");
} else if(flag & 1) {
goto overwrite;
} else
ret= 1;
if(ret>0 && xorriso->info_text[0]) {
Text_shellsafe(iso_rr_path, xorriso->info_text, 1);
if(added_overwrote) {
ret= Xorriso_iso_lstat(xorriso, iso_rr_path, &stbuf, 0);
if(ret == 0 && S_ISREG(stbuf.st_mode)) {
strcat(xorriso->info_text, " (");
Sfile_scale((double) stbuf.st_size,
xorriso->info_text + strlen(xorriso->info_text), 5, 1e4,
1 | 2);
strcat(xorriso->info_text, ")");
} else if (ret == 0 && S_ISDIR(stbuf.st_mode)) {
ret= Xorriso_get_dus(xorriso, iso_rr_path, &du_size, (off_t) 0, 0);
if(ret > 0 && du_size > 0) {
strcat(xorriso->info_text, " (");
Sfile_scale((double) du_size,
xorriso->info_text + strlen(xorriso->info_text), 5, 1e4,
1 | 2);
strcat(xorriso->info_text, ")");
}
}
}
Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "UPDATE", 0);
}
ret= 1;
ex:;
if(split_parts!=NULL)
Splitparts_destroy(&split_parts, split_count, 0);
Xorriso_free_meM(part_path);
if(ret<=0)
return(ret);
if(deleted)
return(2);
return(ret);
}