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usr.bin/bsdiff/bspatch/bspatch.c

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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE. * POSSIBILITY OF SUCH DAMAGE.
*/ */
#include <sys/cdefs.h> #include <sys/cdefs.h>
__FBSDID("$FreeBSD$"); __FBSDID("$FreeBSD$");
#include <bzlib.h> #include <bzlib.h>
#include <stdlib.h> #include <err.h>
#include <fcntl.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h>
#include <string.h> #include <string.h>
#include <err.h>
#include <unistd.h> #include <unistd.h>
#include <fcntl.h>
oshogboUnsubmitted
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Maybe:

#include <bzlib.h>
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

oshogbo: Maybe: #include <bzlib.h> #include <err.h> #include <fcntl.h> #include <stdio.h> #include…
#ifndef O_BINARY #ifndef O_BINARY
#define O_BINARY 0 #define O_BINARY 0
#endif #endif
static off_t offtin(u_char *buf) static off_t offtin(u_char *buf)
{ {
off_t y; off_t y;
y=buf[7]&0x7F; y = buf[7] & 0x7F;
y=y*256;y+=buf[6]; y = y * 256; y += buf[6];
y=y*256;y+=buf[5]; y = y * 256; y += buf[5];
y=y*256;y+=buf[4]; y = y * 256; y += buf[4];
y=y*256;y+=buf[3]; y = y * 256; y += buf[3];
y=y*256;y+=buf[2]; y = y * 256; y += buf[2];
y=y*256;y+=buf[1]; y = y * 256; y += buf[1];
y=y*256;y+=buf[0]; y = y * 256; y += buf[0];
if(buf[7]&0x80) y=-y; if (buf[7] & 0x80)
y = -y;
return y; return (y);
oshogboUnsubmitted
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return (y);

oshogbo: return (y);
} }
static void static void
usage(void) usage(void)
{ {
fprintf(stderr, "usage: bspatch oldfile newfile patchfile\n"); fprintf(stderr, "usage: bspatch oldfile newfile patchfile\n");
exit(1); exit(1);
} }
int main(int argc,char * argv[]) int main(int argc, char *argv[])
{ {
FILE * f, * cpf, * dpf, * epf; FILE *f, *cpf, *dpf, *epf;
oshogboUnsubmitted
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I know that is not direct connected by maybe:

FILE *f, *cpf, *dpf, *epf;
BZFILE *cpfbz2, *dpfbz2, *epfbz2;

oshogbo: I know that is not direct connected by maybe: FILE *f, *cpf, *dpf, *epf; BZFILE *cpfbz2…
BZFILE * cpfbz2, * dpfbz2, * epfbz2; BZFILE *cpfbz2, *dpfbz2, *epfbz2;
int cbz2err, dbz2err, ebz2err; int cbz2err, dbz2err, ebz2err;
int fd; int newfd, oldfd;
ssize_t oldsize,newsize; ssize_t oldsize, newsize;
ssize_t bzctrllen,bzdatalen; ssize_t bzctrllen, bzdatalen;
u_char header[32],buf[8]; u_char header[32], buf[8];
u_char *old, *new; u_char *old, *new;
off_t oldpos,newpos; off_t oldpos, newpos;
off_t ctrl[3]; off_t ctrl[3];
off_t lenread; off_t lenread;
off_t i; off_t i;
if (argc != 4) if (argc != 4)
usage(); usage();
/* Open patch file */ /* Open patch file */
Show All 21 Lines if (fread(header, 1, 32, f) < 32) {
err(1, "fread(%s)", argv[3]); err(1, "fread(%s)", argv[3]);
} }
/* Check for appropriate magic */ /* Check for appropriate magic */
if (memcmp(header, "BSDIFF40", 8) != 0) if (memcmp(header, "BSDIFF40", 8) != 0)
errx(1, "Corrupt patch\n"); errx(1, "Corrupt patch\n");
/* Read lengths from header */ /* Read lengths from header */
bzctrllen=offtin(header+8); bzctrllen = offtin(header + 8);
bzdatalen=offtin(header+16); bzdatalen = offtin(header + 16);
newsize=offtin(header+24); newsize = offtin(header + 24);
if((bzctrllen<0) || (bzdatalen<0) || (newsize<0)) if ((bzctrllen < 0) || (bzdatalen < 0) || (newsize < 0))
errx(1,"Corrupt patch\n"); errx(1, "Corrupt patch\n");
allanjudeUnsubmitted
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space in the wrong position

allanjude: space in the wrong position
/* Close patch file and re-open it via libbzip2 at the right places */ /* Close patch file and re-open it via libbzip2 at the right places */
if (fclose(f)) if (fclose(f))
err(1, "fclose(%s)", argv[3]); err(1, "fclose(%s)", argv[3]);
if ((cpf = fopen(argv[3], "rb")) == NULL) if ((cpf = fopen(argv[3], "rb")) == NULL)
err(1, "fopen(%s)", argv[3]); err(1, "fopen(%s)", argv[3]);
if (fseeko(cpf, 32, SEEK_SET)) if (fseeko(cpf, 32, SEEK_SET))
err(1, "fseeko(%s, %lld)", argv[3], err(1, "fseeko(%s, %lld)", argv[3],
Show All 10 Linesint main(int argc, char *argv[])
if ((epf = fopen(argv[3], "rb")) == NULL) if ((epf = fopen(argv[3], "rb")) == NULL)
err(1, "fopen(%s)", argv[3]); err(1, "fopen(%s)", argv[3]);
if (fseeko(epf, 32 + bzctrllen + bzdatalen, SEEK_SET)) if (fseeko(epf, 32 + bzctrllen + bzdatalen, SEEK_SET))
err(1, "fseeko(%s, %lld)", argv[3], err(1, "fseeko(%s, %lld)", argv[3],
(long long)(32 + bzctrllen + bzdatalen)); (long long)(32 + bzctrllen + bzdatalen));
if ((epfbz2 = BZ2_bzReadOpen(&ebz2err, epf, 0, 0, NULL, 0)) == NULL) if ((epfbz2 = BZ2_bzReadOpen(&ebz2err, epf, 0, 0, NULL, 0)) == NULL)
errx(1, "BZ2_bzReadOpen, bz2err = %d", ebz2err); errx(1, "BZ2_bzReadOpen, bz2err = %d", ebz2err);
if(((fd=open(argv[1],O_RDONLY|O_BINARY,0))<0) || oldfd = open(argv[1], O_RDONLY | O_BINARY, 0);
((oldsize=lseek(fd,0,SEEK_END))==-1) || if (oldfd < 0)
((old=malloc(oldsize+1))==NULL) || err(1, "%s", argv[1]);
(lseek(fd,0,SEEK_SET)!=0) || if ((oldsize = lseek(oldfd, 0, SEEK_END)) == -1 ||
(read(fd,old,oldsize)!=oldsize) || (old = malloc(oldsize+1)) == NULL ||
(close(fd)==-1)) err(1,"%s",argv[1]); lseek(oldfd, 0, SEEK_SET) != 0 ||
if((new=malloc(newsize+1))==NULL) err(1,NULL); read(oldfd, old, oldsize) != oldsize ||
close(oldfd) == -1)
err(1, "%s", argv[1]);
if ((new = malloc(newsize + 1)) == NULL)
err(1, NULL);
oldpos=0;newpos=0; oldpos = 0;
newpos = 0;
while(newpos<newsize) { while (newpos < newsize) {
/* Read control data */ /* Read control data */
emasteAuthorUnsubmitted
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this change (and a similar one for newfd) is not specifically a style(9) change but is a small refactoring also to reduce later capsicum changes

emaste: this change (and a similar one for newfd) is not specifically a style(9) change but is a small…
for(i=0;i<=2;i++) { for (i = 0; i <= 2; i++) {
lenread = BZ2_bzRead(&cbz2err, cpfbz2, buf, 8); lenread = BZ2_bzRead(&cbz2err, cpfbz2, buf, 8);
if ((lenread < 8) || ((cbz2err != BZ_OK) && if ((lenread < 8) || ((cbz2err != BZ_OK) &&
(cbz2err != BZ_STREAM_END))) (cbz2err != BZ_STREAM_END)))
errx(1, "Corrupt patch\n"); errx(1, "Corrupt patch\n");
ctrl[i]=offtin(buf); ctrl[i] = offtin(buf);
} }
/* Sanity-check */ /* Sanity-check */
if ((ctrl[0] < 0) || (ctrl[1] < 0)) if ((ctrl[0] < 0) || (ctrl[1] < 0))
errx(1,"Corrupt patch\n"); errx(1, "Corrupt patch\n");
/* Sanity-check */ /* Sanity-check */
if(newpos+ctrl[0]>newsize) if (newpos + ctrl[0] > newsize)
errx(1,"Corrupt patch\n"); errx(1, "Corrupt patch\n");
/* Read diff string */ /* Read diff string */
lenread = BZ2_bzRead(&dbz2err, dpfbz2, new + newpos, ctrl[0]); lenread = BZ2_bzRead(&dbz2err, dpfbz2, new + newpos, ctrl[0]);
if ((lenread < ctrl[0]) || if ((lenread < ctrl[0]) ||
((dbz2err != BZ_OK) && (dbz2err != BZ_STREAM_END))) ((dbz2err != BZ_OK) && (dbz2err != BZ_STREAM_END)))
errx(1, "Corrupt patch\n"); errx(1, "Corrupt patch\n");
/* Add old data to diff string */ /* Add old data to diff string */
for(i=0;i<ctrl[0];i++) for (i = 0; i < ctrl[0]; i++)
if((oldpos+i>=0) && (oldpos+i<oldsize)) if ((oldpos + i >= 0) && (oldpos + i < oldsize))
new[newpos+i]+=old[oldpos+i]; new[newpos + i] += old[oldpos + i];
/* Adjust pointers */ /* Adjust pointers */
newpos+=ctrl[0]; newpos += ctrl[0];
oldpos+=ctrl[0]; oldpos += ctrl[0];
/* Sanity-check */ /* Sanity-check */
if(newpos+ctrl[1]>newsize) if (newpos + ctrl[1] > newsize)
errx(1,"Corrupt patch\n"); errx(1, "Corrupt patch\n");
/* Read extra string */ /* Read extra string */
lenread = BZ2_bzRead(&ebz2err, epfbz2, new + newpos, ctrl[1]); lenread = BZ2_bzRead(&ebz2err, epfbz2, new + newpos, ctrl[1]);
if ((lenread < ctrl[1]) || if ((lenread < ctrl[1]) ||
((ebz2err != BZ_OK) && (ebz2err != BZ_STREAM_END))) ((ebz2err != BZ_OK) && (ebz2err != BZ_STREAM_END)))
errx(1, "Corrupt patch\n"); errx(1, "Corrupt patch\n");
/* Adjust pointers */ /* Adjust pointers */
newpos+=ctrl[1]; newpos+=ctrl[1];
oldpos+=ctrl[2]; oldpos+=ctrl[2];
} }
/* Clean up the bzip2 reads */ /* Clean up the bzip2 reads */
BZ2_bzReadClose(&cbz2err, cpfbz2); BZ2_bzReadClose(&cbz2err, cpfbz2);
BZ2_bzReadClose(&dbz2err, dpfbz2); BZ2_bzReadClose(&dbz2err, dpfbz2);
BZ2_bzReadClose(&ebz2err, epfbz2); BZ2_bzReadClose(&ebz2err, epfbz2);
if (fclose(cpf) || fclose(dpf) || fclose(epf)) if (fclose(cpf) || fclose(dpf) || fclose(epf))
err(1, "fclose(%s)", argv[3]); err(1, "fclose(%s)", argv[3]);
/* Write the new file */ /* Write the new file */
if(((fd=open(argv[2],O_CREAT|O_TRUNC|O_WRONLY|O_BINARY,0666))<0) || newfd = open(argv[2], O_CREAT | O_TRUNC | O_WRONLY | O_BINARY, 0666);
(write(fd,new,newsize)!=newsize) || (close(fd)==-1)) if (newfd < 0)
err(1,"%s",argv[2]); err(1, "%s", argv[2]);
if (write(newfd, new, newsize) != newsize || close(newfd) == -1)
err(1, "%s", argv[2]);
free(new); free(new);
free(old); free(old);
return 0; return (0);
oshogboUnsubmitted
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return (0);

oshogbo: return (0);
} }