Slightly better fringe case handling and GNU tar like error messages.
-Erik
This commit is contained in:
Erik Andersen
parent
825aead68b
commit
6a34b539db
134
archival/tar.c
134
archival/tar.c
@ -261,6 +261,19 @@ extern int tar_main(int argc, char **argv)
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}
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static void
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fixUpPermissions(TarInfo *header)
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{
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struct utimbuf t;
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/* Now set permissions etc for the new file */
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chown(header->name, header->uid, header->gid);
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chmod(header->name, header->mode);
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/* Reset the time */
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t.actime = time(0);
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t.modtime = header->mtime;
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utime(header->name, &t);
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}
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static int
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tarExtractRegularFile(TarInfo *header, int extractFlag, int tostdoutFlag)
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{
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size_t writeSize;
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@ -295,7 +308,7 @@ tarExtractRegularFile(TarInfo *header, int extractFlag, int tostdoutFlag)
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if ( (readSize = fullRead(header->tarFd, buffer, readSize)) <= 0 ) {
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/* Tarball seems to have a problem */
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errorMsg("tar: Unexpected EOF in archive\n");
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return;
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return( FALSE);
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}
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if ( readSize < writeSize )
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writeSize = readSize;
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@ -306,7 +319,7 @@ tarExtractRegularFile(TarInfo *header, int extractFlag, int tostdoutFlag)
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if ((actualWriteSz=fullWrite(outFd, buffer, writeSize)) != writeSize ) {
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/* Output file seems to have a problem */
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errorMsg(io_error, header->name, strerror(errno));
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return;
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return( FALSE);
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}
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}
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@ -316,41 +329,23 @@ tarExtractRegularFile(TarInfo *header, int extractFlag, int tostdoutFlag)
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/* Now we are done writing the file out, so try
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* and fix up the permissions and whatnot */
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if (extractFlag==TRUE && tostdoutFlag==FALSE) {
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struct utimbuf t;
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/* Now set permissions etc for the new file */
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fchown(outFd, header->uid, header->gid);
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fchmod(outFd, header->mode & ~S_IFMT);
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close(outFd);
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/* File must be closed before trying to change the date */
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t.actime = time(0);
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t.modtime = header->mtime;
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utime(header->name, &t);
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fixUpPermissions(header);
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}
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return( TRUE);
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}
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static void
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fixUpPermissions(TarInfo *header)
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{
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struct utimbuf t;
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/* Now set permissions etc for the new file */
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chown(header->name, header->uid, header->gid);
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chmod(header->name, header->mode);
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/* Reset the time */
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t.actime = time(0);
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t.modtime = header->mtime;
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utime(header->name, &t);
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}
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static void
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static int
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tarExtractDirectory(TarInfo *header, int extractFlag, int tostdoutFlag)
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{
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if (extractFlag==FALSE || tostdoutFlag==TRUE)
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return;
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return( TRUE);
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if (createPath(header->name, header->mode) != TRUE) {
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errorMsg("Error creating directory '%s': %s", header->name, strerror(errno));
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return;
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errorMsg("tar: %s: Cannot mkdir: %s\n",
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header->name, strerror(errno));
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return( FALSE);
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}
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/* make the final component, just in case it was
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* omitted by createPath() (which will skip the
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@ -358,35 +353,37 @@ tarExtractDirectory(TarInfo *header, int extractFlag, int tostdoutFlag)
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if (mkdir(header->name, header->mode) == 0) {
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fixUpPermissions(header);
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}
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return( TRUE);
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}
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static void
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static int
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tarExtractHardLink(TarInfo *header, int extractFlag, int tostdoutFlag)
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{
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if (extractFlag==FALSE || tostdoutFlag==TRUE)
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return;
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return( TRUE);
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if (link(header->linkname, header->name) < 0) {
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errorMsg("Error creating hard link '%s' to '%s': %s\n",
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errorMsg("tar: %s: Cannot create hard link to '%s': %s\n",
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header->name, header->linkname, strerror(errno));
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return;
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return( FALSE);
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}
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/* Now set permissions etc for the new directory */
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fixUpPermissions(header);
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return( TRUE);
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}
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static void
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static int
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tarExtractSymLink(TarInfo *header, int extractFlag, int tostdoutFlag)
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{
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if (extractFlag==FALSE || tostdoutFlag==TRUE)
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return;
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return( TRUE);
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#ifdef S_ISLNK
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if (symlink(header->linkname, header->name) < 0) {
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errorMsg("Error creating symlink '%s' to '%s': %s\n",
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errorMsg("tar: %s: Cannot create symlink to '%s': %s\n",
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header->name, header->linkname, strerror(errno));
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return;
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return( FALSE);
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}
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/* Try to change ownership of the symlink.
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* If libs doesn't support that, don't bother.
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@ -399,24 +396,36 @@ tarExtractSymLink(TarInfo *header, int extractFlag, int tostdoutFlag)
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/* Do not change permissions or date on symlink,
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* since it changes the pointed to file instead. duh. */
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#else
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fprintf(stderr, "Cannot create symbolic links\n");
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errorMsg("tar: %s: Cannot create symlink to '%s': %s\n",
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header->name, header->linkname,
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"symlinks not supported");
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#endif
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return( TRUE);
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}
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static void
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static int
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tarExtractSpecial(TarInfo *header, int extractFlag, int tostdoutFlag)
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{
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if (extractFlag==FALSE || tostdoutFlag==TRUE)
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return;
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return( TRUE);
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if (S_ISCHR(header->mode) || S_ISBLK(header->mode) || S_ISSOCK(header->mode)) {
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mknod(header->name, header->mode, makedev(header->devmajor, header->devminor));
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if (mknod(header->name, header->mode, makedev(header->devmajor, header->devminor)) < 0) {
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errorMsg("tar: %s: Cannot mknod: %s\n",
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header->name, strerror(errno));
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return( FALSE);
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}
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} else if (S_ISFIFO(header->mode)) {
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mkfifo(header->name, header->mode);
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if (mkfifo(header->name, header->mode) < 0) {
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errorMsg("tar: %s: Cannot mkfifo: %s\n",
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header->name, strerror(errno));
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return( FALSE);
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}
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}
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/* Now set permissions etc for the new directory */
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fixUpPermissions(header);
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return( TRUE);
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}
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/* Read an octal value in a field of the specified width, with optional
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@ -535,7 +544,20 @@ static int readTarFile(const char* tarName, int extractFlag, int listFlag,
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char buf[35];
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struct tm *tm = localtime (&(header.mtime));
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len=printf("%s %d/%-d ", modeString(header.mode), header.uid, header.gid);
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len=printf("%s ", modeString(header.mode));
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memset(buf, 0, 8*sizeof(char));
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my_getpwuid(buf, header.uid);
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if (! *buf)
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len+=printf("%d", header.uid);
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else
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len+=printf("%s", buf);
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memset(buf, 0, 8*sizeof(char));
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my_getgrgid(buf, header.gid);
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if (! *buf)
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len+=printf("/%-d ", header.gid);
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else
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len+=printf("/%-s ", buf);
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if (header.type==CHRTYPE || header.type==BLKTYPE) {
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len1=snprintf(buf, sizeof(buf), "%ld,%-ld ",
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header.devmajor, header.devminor);
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@ -558,11 +580,15 @@ static int readTarFile(const char* tarName, int extractFlag, int listFlag,
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if (verboseFlag == TRUE || listFlag == TRUE) {
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/* Now the normal listing */
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printf("%s", header.name);
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}
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if (verboseFlag == TRUE && listFlag == TRUE) {
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/* If this is a link, say so */
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if (header.type==LNKTYPE)
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printf(" link to %s", header.linkname);
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else if (header.type==SYMTYPE)
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printf(" -> %s", header.linkname);
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}
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if (verboseFlag == TRUE || listFlag == TRUE) {
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printf("\n");
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}
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@ -573,6 +599,8 @@ static int readTarFile(const char* tarName, int extractFlag, int listFlag,
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skipFileFlag = TRUE;
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}
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#endif
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/* Remove any clutter lying in our way */
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unlink( header.name);
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/* If we got here, we can be certain we have a legitimate
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* header to work with. So work with it. */
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@ -582,22 +610,27 @@ static int readTarFile(const char* tarName, int extractFlag, int listFlag,
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/* If the name ends in a '/' then assume it is
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* supposed to be a directory, and fall through */
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if (header.name[strlen(header.name)-1] != '/') {
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tarExtractRegularFile(&header, extractFlag, tostdoutFlag);
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if (tarExtractRegularFile(&header, extractFlag, tostdoutFlag)==FALSE)
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errorFlag=TRUE;
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break;
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}
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case DIRTYPE:
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tarExtractDirectory( &header, extractFlag, tostdoutFlag);
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if (tarExtractDirectory( &header, extractFlag, tostdoutFlag)==FALSE)
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errorFlag=TRUE;
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break;
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case LNKTYPE:
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tarExtractHardLink( &header, extractFlag, tostdoutFlag);
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if (tarExtractHardLink( &header, extractFlag, tostdoutFlag)==FALSE)
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errorFlag=TRUE;
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break;
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case SYMTYPE:
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tarExtractSymLink( &header, extractFlag, tostdoutFlag);
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if (tarExtractSymLink( &header, extractFlag, tostdoutFlag)==FALSE)
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errorFlag=TRUE;
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break;
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case CHRTYPE:
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case BLKTYPE:
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case FIFOTYPE:
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tarExtractSpecial( &header, extractFlag, tostdoutFlag);
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if (tarExtractSpecial( &header, extractFlag, tostdoutFlag)==FALSE)
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errorFlag=TRUE;
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break;
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default:
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close( tarFd);
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@ -610,14 +643,19 @@ static int readTarFile(const char* tarName, int extractFlag, int listFlag,
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errorMsg( "Error reading '%s': %s\n", tarName, strerror(errno));
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return ( FALSE);
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}
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else
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else if (errorFlag==TRUE) {
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errorMsg( "tar: Error exit delayed from previous errors\n");
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return( FALSE);
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} else
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return( status);
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/* Stuff to do when we are done */
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endgame:
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close( tarFd);
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if ( *(header.name) == '\0' ) {
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if (errorFlag==FALSE)
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if (errorFlag==TRUE)
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errorMsg( "tar: Error exit delayed from previous errors\n");
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else
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return( TRUE);
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}
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return( FALSE);
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134
tar.c
134
tar.c
@ -261,6 +261,19 @@ extern int tar_main(int argc, char **argv)
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}
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static void
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fixUpPermissions(TarInfo *header)
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{
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struct utimbuf t;
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/* Now set permissions etc for the new file */
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chown(header->name, header->uid, header->gid);
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chmod(header->name, header->mode);
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/* Reset the time */
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t.actime = time(0);
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t.modtime = header->mtime;
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utime(header->name, &t);
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}
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static int
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tarExtractRegularFile(TarInfo *header, int extractFlag, int tostdoutFlag)
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{
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size_t writeSize;
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@ -295,7 +308,7 @@ tarExtractRegularFile(TarInfo *header, int extractFlag, int tostdoutFlag)
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if ( (readSize = fullRead(header->tarFd, buffer, readSize)) <= 0 ) {
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/* Tarball seems to have a problem */
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errorMsg("tar: Unexpected EOF in archive\n");
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return;
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return( FALSE);
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}
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if ( readSize < writeSize )
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writeSize = readSize;
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@ -306,7 +319,7 @@ tarExtractRegularFile(TarInfo *header, int extractFlag, int tostdoutFlag)
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if ((actualWriteSz=fullWrite(outFd, buffer, writeSize)) != writeSize ) {
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/* Output file seems to have a problem */
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errorMsg(io_error, header->name, strerror(errno));
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return;
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return( FALSE);
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}
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}
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@ -316,41 +329,23 @@ tarExtractRegularFile(TarInfo *header, int extractFlag, int tostdoutFlag)
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/* Now we are done writing the file out, so try
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* and fix up the permissions and whatnot */
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if (extractFlag==TRUE && tostdoutFlag==FALSE) {
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struct utimbuf t;
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/* Now set permissions etc for the new file */
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fchown(outFd, header->uid, header->gid);
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fchmod(outFd, header->mode & ~S_IFMT);
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close(outFd);
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/* File must be closed before trying to change the date */
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t.actime = time(0);
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t.modtime = header->mtime;
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utime(header->name, &t);
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fixUpPermissions(header);
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}
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return( TRUE);
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}
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static void
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fixUpPermissions(TarInfo *header)
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{
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struct utimbuf t;
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/* Now set permissions etc for the new file */
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chown(header->name, header->uid, header->gid);
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chmod(header->name, header->mode);
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/* Reset the time */
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t.actime = time(0);
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t.modtime = header->mtime;
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utime(header->name, &t);
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}
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static void
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static int
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tarExtractDirectory(TarInfo *header, int extractFlag, int tostdoutFlag)
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{
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if (extractFlag==FALSE || tostdoutFlag==TRUE)
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return;
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return( TRUE);
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if (createPath(header->name, header->mode) != TRUE) {
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errorMsg("Error creating directory '%s': %s", header->name, strerror(errno));
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return;
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errorMsg("tar: %s: Cannot mkdir: %s\n",
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header->name, strerror(errno));
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return( FALSE);
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}
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/* make the final component, just in case it was
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* omitted by createPath() (which will skip the
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@ -358,35 +353,37 @@ tarExtractDirectory(TarInfo *header, int extractFlag, int tostdoutFlag)
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if (mkdir(header->name, header->mode) == 0) {
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fixUpPermissions(header);
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}
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return( TRUE);
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}
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static void
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static int
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tarExtractHardLink(TarInfo *header, int extractFlag, int tostdoutFlag)
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{
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if (extractFlag==FALSE || tostdoutFlag==TRUE)
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return;
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return( TRUE);
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if (link(header->linkname, header->name) < 0) {
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errorMsg("Error creating hard link '%s' to '%s': %s\n",
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errorMsg("tar: %s: Cannot create hard link to '%s': %s\n",
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header->name, header->linkname, strerror(errno));
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return;
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return( FALSE);
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}
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/* Now set permissions etc for the new directory */
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fixUpPermissions(header);
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return( TRUE);
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}
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static void
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static int
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tarExtractSymLink(TarInfo *header, int extractFlag, int tostdoutFlag)
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{
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if (extractFlag==FALSE || tostdoutFlag==TRUE)
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return;
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return( TRUE);
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#ifdef S_ISLNK
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if (symlink(header->linkname, header->name) < 0) {
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errorMsg("Error creating symlink '%s' to '%s': %s\n",
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errorMsg("tar: %s: Cannot create symlink to '%s': %s\n",
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header->name, header->linkname, strerror(errno));
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return;
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return( FALSE);
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}
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/* Try to change ownership of the symlink.
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* If libs doesn't support that, don't bother.
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@ -399,24 +396,36 @@ tarExtractSymLink(TarInfo *header, int extractFlag, int tostdoutFlag)
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/* Do not change permissions or date on symlink,
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* since it changes the pointed to file instead. duh. */
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#else
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fprintf(stderr, "Cannot create symbolic links\n");
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errorMsg("tar: %s: Cannot create symlink to '%s': %s\n",
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header->name, header->linkname,
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"symlinks not supported");
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#endif
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return( TRUE);
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}
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static void
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static int
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tarExtractSpecial(TarInfo *header, int extractFlag, int tostdoutFlag)
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{
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if (extractFlag==FALSE || tostdoutFlag==TRUE)
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return;
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return( TRUE);
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if (S_ISCHR(header->mode) || S_ISBLK(header->mode) || S_ISSOCK(header->mode)) {
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mknod(header->name, header->mode, makedev(header->devmajor, header->devminor));
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if (mknod(header->name, header->mode, makedev(header->devmajor, header->devminor)) < 0) {
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errorMsg("tar: %s: Cannot mknod: %s\n",
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header->name, strerror(errno));
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return( FALSE);
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}
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} else if (S_ISFIFO(header->mode)) {
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mkfifo(header->name, header->mode);
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if (mkfifo(header->name, header->mode) < 0) {
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errorMsg("tar: %s: Cannot mkfifo: %s\n",
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header->name, strerror(errno));
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return( FALSE);
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}
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}
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/* Now set permissions etc for the new directory */
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fixUpPermissions(header);
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return( TRUE);
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}
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/* Read an octal value in a field of the specified width, with optional
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@ -535,7 +544,20 @@ static int readTarFile(const char* tarName, int extractFlag, int listFlag,
|
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char buf[35];
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struct tm *tm = localtime (&(header.mtime));
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len=printf("%s %d/%-d ", modeString(header.mode), header.uid, header.gid);
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len=printf("%s ", modeString(header.mode));
|
||||
memset(buf, 0, 8*sizeof(char));
|
||||
my_getpwuid(buf, header.uid);
|
||||
if (! *buf)
|
||||
len+=printf("%d", header.uid);
|
||||
else
|
||||
len+=printf("%s", buf);
|
||||
memset(buf, 0, 8*sizeof(char));
|
||||
my_getgrgid(buf, header.gid);
|
||||
if (! *buf)
|
||||
len+=printf("/%-d ", header.gid);
|
||||
else
|
||||
len+=printf("/%-s ", buf);
|
||||
|
||||
if (header.type==CHRTYPE || header.type==BLKTYPE) {
|
||||
len1=snprintf(buf, sizeof(buf), "%ld,%-ld ",
|
||||
header.devmajor, header.devminor);
|
||||
@ -558,11 +580,15 @@ static int readTarFile(const char* tarName, int extractFlag, int listFlag,
|
||||
if (verboseFlag == TRUE || listFlag == TRUE) {
|
||||
/* Now the normal listing */
|
||||
printf("%s", header.name);
|
||||
}
|
||||
if (verboseFlag == TRUE && listFlag == TRUE) {
|
||||
/* If this is a link, say so */
|
||||
if (header.type==LNKTYPE)
|
||||
printf(" link to %s", header.linkname);
|
||||
else if (header.type==SYMTYPE)
|
||||
printf(" -> %s", header.linkname);
|
||||
}
|
||||
if (verboseFlag == TRUE || listFlag == TRUE) {
|
||||
printf("\n");
|
||||
}
|
||||
|
||||
@ -573,6 +599,8 @@ static int readTarFile(const char* tarName, int extractFlag, int listFlag,
|
||||
skipFileFlag = TRUE;
|
||||
}
|
||||
#endif
|
||||
/* Remove any clutter lying in our way */
|
||||
unlink( header.name);
|
||||
|
||||
/* If we got here, we can be certain we have a legitimate
|
||||
* header to work with. So work with it. */
|
||||
@ -582,22 +610,27 @@ static int readTarFile(const char* tarName, int extractFlag, int listFlag,
|
||||
/* If the name ends in a '/' then assume it is
|
||||
* supposed to be a directory, and fall through */
|
||||
if (header.name[strlen(header.name)-1] != '/') {
|
||||
tarExtractRegularFile(&header, extractFlag, tostdoutFlag);
|
||||
if (tarExtractRegularFile(&header, extractFlag, tostdoutFlag)==FALSE)
|
||||
errorFlag=TRUE;
|
||||
break;
|
||||
}
|
||||
case DIRTYPE:
|
||||
tarExtractDirectory( &header, extractFlag, tostdoutFlag);
|
||||
if (tarExtractDirectory( &header, extractFlag, tostdoutFlag)==FALSE)
|
||||
errorFlag=TRUE;
|
||||
break;
|
||||
case LNKTYPE:
|
||||
tarExtractHardLink( &header, extractFlag, tostdoutFlag);
|
||||
if (tarExtractHardLink( &header, extractFlag, tostdoutFlag)==FALSE)
|
||||
errorFlag=TRUE;
|
||||
break;
|
||||
case SYMTYPE:
|
||||
tarExtractSymLink( &header, extractFlag, tostdoutFlag);
|
||||
if (tarExtractSymLink( &header, extractFlag, tostdoutFlag)==FALSE)
|
||||
errorFlag=TRUE;
|
||||
break;
|
||||
case CHRTYPE:
|
||||
case BLKTYPE:
|
||||
case FIFOTYPE:
|
||||
tarExtractSpecial( &header, extractFlag, tostdoutFlag);
|
||||
if (tarExtractSpecial( &header, extractFlag, tostdoutFlag)==FALSE)
|
||||
errorFlag=TRUE;
|
||||
break;
|
||||
default:
|
||||
close( tarFd);
|
||||
@ -610,14 +643,19 @@ static int readTarFile(const char* tarName, int extractFlag, int listFlag,
|
||||
errorMsg( "Error reading '%s': %s\n", tarName, strerror(errno));
|
||||
return ( FALSE);
|
||||
}
|
||||
else
|
||||
else if (errorFlag==TRUE) {
|
||||
errorMsg( "tar: Error exit delayed from previous errors\n");
|
||||
return( FALSE);
|
||||
} else
|
||||
return( status);
|
||||
|
||||
/* Stuff to do when we are done */
|
||||
endgame:
|
||||
close( tarFd);
|
||||
if ( *(header.name) == '\0' ) {
|
||||
if (errorFlag==FALSE)
|
||||
if (errorFlag==TRUE)
|
||||
errorMsg( "tar: Error exit delayed from previous errors\n");
|
||||
else
|
||||
return( TRUE);
|
||||
}
|
||||
return( FALSE);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user