+/* vi: set sw=4 ts=4: */
/*
* Mini tar implementation for busybox based on code taken from sash.
*
* Modified for busybox by Erik Andersen <andersee@debian.org>
* Adjusted to grok stdin/stdout options.
*
+ * Modified to handle device special files by Matt Porter
+ * <porter@debian.org>
+ *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
#include <fcntl.h>
#include <signal.h>
#include <time.h>
+#include <utime.h>
+#include <sys/types.h>
+#include <sys/sysmacros.h>
+#include <sys/param.h> /* for PATH_MAX */
+
+#ifdef BB_FEATURE_TAR_CREATE
static const char tar_usage[] =
- "tar -[cxtvOf] [tarFileName] [FILE] ...\n"
- "Create, extract, or list files from a tar file\n\n"
- "\tc=create, x=extract, t=list contents, v=verbose,\n"
- "\tO=extract to stdout, f=tarfile or \"-\" for stdin\n";
+ "tar -[cxtvOf] [tarFileName] [FILE] ...\n\n"
+ "Create, extract, or list files from a tar file.\n\n"
+ "Options:\n"
+
+ "\tc=create, x=extract, t=list contents, v=verbose,\n"
+ "\tO=extract to stdout, f=tarfile or \"-\" for stdin\n";
+#else
+
+static const char tar_usage[] =
+ "tar -[xtvOf] [tarFileName] [FILE] ...\n\n"
+ "Extract, or list files stored in a tar file. This\n"
+ "version of tar does not support creation of tar files.\n\n"
+ "Options:\n"
+
+ "\tx=extract, t=list contents, v=verbose,\n"
+ "\tO=extract to stdout, f=tarfile or \"-\" for stdin\n";
+
+#endif
/*
* with zero padding. We only process this information minimally.
*/
typedef struct {
- char name[TAR_NAME_SIZE];
- char mode[8];
- char uid[8];
- char gid[8];
- char size[12];
- char mtime[12];
- char checkSum[8];
- char typeFlag;
- char linkName[TAR_NAME_SIZE];
- char magic[6];
- char version[2];
- char uname[32];
- char gname[32];
- char devMajor[8];
- char devMinor[8];
- char prefix[155];
+ char name[TAR_NAME_SIZE];
+ char mode[8];
+ char uid[8];
+ char gid[8];
+ char size[12];
+ char mtime[12];
+ char checkSum[8];
+ char typeFlag;
+ char linkName[TAR_NAME_SIZE];
+ char magic[6];
+ char version[2];
+ char uname[32];
+ char gname[32];
+ char devMajor[8];
+ char devMinor[8];
+ char prefix[155];
} TarHeader;
#define TAR_MAGIC "ustar"
static int verboseFlag;
static int tostdoutFlag;
-static int inHeader;
+static int inHeader; // <- check me
static int badHeader;
static int errorFlag;
static int skipFileFlag;
static int eofFlag;
static long dataCc;
static int outFd;
-static char outName[TAR_NAME_SIZE];
+static const char *outName;
+static int mode;
+static int uid;
+static int gid;
+static time_t mtime;
/*
* Static data associated with the tar file.
/*
* Local procedures to restore files from a tar file.
*/
-static void readTarFile (int fileCount, char **fileTable);
-static void readData (const char *cp, int count);
-static long getOctal (const char *cp, int len);
+static void readTarFile(int fileCount, char **fileTable);
+static void readData(const char *cp, int count);
+static long getOctal(const char *cp, int len);
+
+static void readHeader(const TarHeader * hp,
+
+ int fileCount, char **fileTable);
-static void readHeader (const TarHeader * hp,
- int fileCount, char **fileTable);
+static int wantFileName(const char *fileName,
+ int fileCount, char **fileTable);
+#ifdef BB_FEATURE_TAR_CREATE
/*
* Local procedures to save files into a tar file.
*/
-static void saveFile (const char *fileName, int seeLinks);
+static void saveFile(const char *fileName, int seeLinks);
-static void saveRegularFile (const char *fileName,
- const struct stat *statbuf);
+static void saveRegularFile(const char *fileName,
-static void saveDirectory (const char *fileName,
- const struct stat *statbuf);
+ const struct stat *statbuf);
-static int wantFileName (const char *fileName,
- int fileCount, char **fileTable);
+static void saveDirectory(const char *fileName,
-static void writeHeader (const char *fileName, const struct stat *statbuf);
+ const struct stat *statbuf);
-static void writeTarFile (int fileCount, char **fileTable);
-static void writeTarBlock (const char *buf, int len);
-static int putOctal (char *cp, int len, long value);
+static void writeHeader(const char *fileName, const struct stat *statbuf);
+static void writeTarFile(int fileCount, char **fileTable);
+static void writeTarBlock(const char *buf, int len);
+static int putOctal(char *cp, int len, long value);
-extern int tar_main (int argc, char **argv)
+#endif
+
+
+extern int tar_main(int argc, char **argv)
{
- const char *options;
+ const char *options;
- argc--;
- argv++;
+ argc--;
+ argv++;
- if (argc < 1)
- usage( tar_usage);
+ if (argc < 1)
+ usage(tar_usage);
- errorFlag = FALSE;
- extractFlag = FALSE;
- createFlag = FALSE;
- listFlag = FALSE;
- verboseFlag = FALSE;
- tostdoutFlag = FALSE;
- tarName = NULL;
- tarDev = 0;
- tarInode = 0;
- tarFd = -1;
+ errorFlag = FALSE;
+ extractFlag = FALSE;
+ createFlag = FALSE;
+ listFlag = FALSE;
+ verboseFlag = FALSE;
+ tostdoutFlag = FALSE;
+ tarName = NULL;
+ tarDev = 0;
+ tarInode = 0;
+ tarFd = -1;
- /*
- * Parse the options.
- */
- options = *argv++;
- argc--;
+ /*
+ * Parse the options.
+ */
+ if (**argv == '-')
+ options = (*argv++) + 1;
+ else
+ options = (*argv++);
+ argc--;
- if (**argv == '-') {
for (; *options; options++) {
- switch (*options) {
- case 'f':
- if (tarName != NULL) {
- fprintf (stderr, "Only one 'f' option allowed\n");
+ switch (*options) {
+ case 'f':
+ if (tarName != NULL) {
+ fprintf(stderr, "Only one 'f' option allowed\n");
+
+ exit(FALSE);
+ }
+
+ tarName = *argv++;
+ argc--;
+
+ break;
+
+ case 't':
+ if (extractFlag == TRUE || createFlag == TRUE)
+ goto flagError;
+ listFlag = TRUE;
+ break;
+
+ case 'x':
+ if (listFlag == TRUE || createFlag == TRUE)
+ goto flagError;
+ extractFlag = TRUE;
+ break;
+ case 'c':
+ if (extractFlag == TRUE || listFlag == TRUE)
+ goto flagError;
+ createFlag = TRUE;
+ break;
+
+ case 'v':
+ verboseFlag = TRUE;
+ break;
+
+ case 'O':
+ tostdoutFlag = TRUE;
+ break;
+
+ case '-':
+ usage(tar_usage);
+ break;
+
+ default:
+ fprintf(stderr, "Unknown tar flag '%c'\n"
+ "Try `tar --help' for more information\n", *options);
+ exit(FALSE);
+ }
+ }
+
+ /*
+ * Do the correct type of action supplying the rest of the
+ * command line arguments as the list of files to process.
+ */
+ if (createFlag == TRUE) {
+#ifndef BB_FEATURE_TAR_CREATE
+ fprintf(stderr,
+ "This version of tar was not compiled with tar creation support.\n");
+ exit(FALSE);
+#else
+ writeTarFile(argc, argv);
+#endif
+ } else {
+ readTarFile(argc, argv);
+ }
+ if (errorFlag == TRUE) {
+ fprintf(stderr, "\n");
+ }
+ exit(!errorFlag);
+
+ flagError:
+ fprintf(stderr, "Exactly one of 'c', 'x' or 't' must be specified\n");
+ exit(FALSE);
+}
+
+
+/*
+ * Read a tar file and extract or list the specified files within it.
+ * If the list is empty than all files are extracted or listed.
+ */
+static void readTarFile(int fileCount, char **fileTable)
+{
+ const char *cp;
+ int cc;
+ int inCc;
+ int blockSize;
+ char buf[BUF_SIZE];
+
+ skipFileFlag = FALSE;
+ badHeader = FALSE;
+ warnedRoot = FALSE;
+ eofFlag = FALSE;
+ inHeader = TRUE;
+ inCc = 0;
+ dataCc = 0;
+ outFd = -1;
+ blockSize = sizeof(buf);
+ cp = buf;
+
+ /*
+ * Open the tar file for reading.
+ */
+ if ((tarName == NULL) || !strcmp(tarName, "-")) {
+ tarFd = fileno(stdin);
+ } else
+ tarFd = open(tarName, O_RDONLY);
+
+ if (tarFd < 0) {
+ perror(tarName);
+ errorFlag = TRUE;
+ return;
+ }
- exit (FALSE);
+ /*
+ * Read blocks from the file until an end of file header block
+ * has been seen. (A real end of file from a read is an error.)
+ */
+ while (eofFlag == FALSE) {
+ /*
+ * Read the next block of data if necessary.
+ * This will be a large block if possible, which we will
+ * then process in the small tar blocks.
+ */
+ if (inCc <= 0) {
+ cp = buf;
+ inCc = fullRead(tarFd, buf, blockSize);
+
+ if (inCc < 0) {
+ perror(tarName);
+ errorFlag = TRUE;
+ goto done;
+ }
+
+ if (inCc == 0) {
+ fprintf(stderr,
+ "Unexpected end of file from \"%s\"", tarName);
+ errorFlag = TRUE;
+ goto done;
+ }
}
- tarName = *argv++;
- argc--;
+ /*
+ * If we are expecting a header block then examine it.
+ */
+ if (inHeader == TRUE) {
+ readHeader((const TarHeader *) cp, fileCount, fileTable);
- break;
+ cp += TAR_BLOCK_SIZE;
+ inCc -= TAR_BLOCK_SIZE;
- case 't':
- listFlag = TRUE;
- break;
+ continue;
+ }
- case 'x':
- extractFlag = TRUE;
- break;
+ /*
+ * We are currently handling the data for a file.
+ * Process the minimum of the amount of data we have available
+ * and the amount left to be processed for the file.
+ */
+ cc = inCc;
- case 'c':
- createFlag = TRUE;
- break;
+ if (cc > dataCc)
+ cc = dataCc;
- case 'v':
- verboseFlag = TRUE;
- break;
+ readData(cp, cc);
- case 'O':
- tostdoutFlag = TRUE;
- break;
+ /*
+ * If the amount left isn't an exact multiple of the tar block
+ * size then round it up to the next block boundary since there
+ * is padding at the end of the file.
+ */
+ if (cc % TAR_BLOCK_SIZE)
+ cc += TAR_BLOCK_SIZE - (cc % TAR_BLOCK_SIZE);
- case '-':
- break;
+ cp += cc;
+ inCc -= cc;
+ }
- default:
- fprintf (stderr, "Unknown tar flag '%c'\n", *options);
+ done:
+ /*
+ * Close the tar file if needed.
+ */
+ if ((tarFd >= 0) && (close(tarFd) < 0))
+ perror(tarName);
- exit (FALSE);
- }
+ /*
+ * Close the output file if needed.
+ * This is only done here on a previous error and so no
+ * message is required on errors.
+ */
+ if (tostdoutFlag == FALSE) {
+ if (outFd >= 0) {
+ close(outFd);
+ }
}
- }
-
- /*
- * Validate the options.
- */
- if (extractFlag + listFlag + createFlag != 1) {
- fprintf (stderr,
- "Exactly one of 'c', 'x' or 't' must be specified\n");
-
- exit (FALSE);
- }
-
- /*
- * Do the correct type of action supplying the rest of the
- * command line arguments as the list of files to process.
- */
- if (createFlag)
- writeTarFile (argc, argv);
- else
- readTarFile (argc, argv);
- if (errorFlag)
- fprintf (stderr, "\n");
- exit (errorFlag);
}
/*
- * Read a tar file and extract or list the specified files within it.
- * If the list is empty than all files are extracted or listed.
+ * Examine the header block that was just read.
+ * This can specify the information for another file, or it can mark
+ * the end of the tar file.
*/
-static void readTarFile (int fileCount, char **fileTable)
+static void
+readHeader(const TarHeader * hp, int fileCount, char **fileTable)
{
- const char *cp;
- int cc;
- int inCc;
- int blockSize;
- char buf[BUF_SIZE];
-
- skipFileFlag = FALSE;
- badHeader = FALSE;
- warnedRoot = FALSE;
- eofFlag = FALSE;
- inHeader = TRUE;
- inCc = 0;
- dataCc = 0;
- outFd = -1;
- blockSize = sizeof (buf);
- cp = buf;
-
- /*
- * Open the tar file for reading.
- */
- if ((tarName == NULL) || !strcmp (tarName, "-")) {
- tarFd = STDIN;
- } else
- tarFd = open (tarName, O_RDONLY);
-
- if (tarFd < 0) {
- perror (tarName);
- errorFlag = TRUE;
- return;
- }
-
- /*
- * Read blocks from the file until an end of file header block
- * has been seen. (A real end of file from a read is an error.)
- */
- while (!eofFlag) {
+ int checkSum;
+ int cc;
+ int hardLink;
+ int softLink;
+ int devFileFlag;
+ unsigned int major;
+ unsigned int minor;
+ long size;
+ struct utimbuf utb;
+
/*
- * Read the next block of data if necessary.
- * This will be a large block if possible, which we will
- * then process in the small tar blocks.
+ * If the block is completely empty, then this is the end of the
+ * archive file. If the name is null, then just skip this header.
*/
- if (inCc <= 0) {
- cp = buf;
- inCc = fullRead (tarFd, buf, blockSize);
+ outName = hp->name;
- if (inCc < 0) {
- perror (tarName);
- errorFlag = TRUE;
- goto done;
- }
+ if (*outName == '\0') {
+ for (cc = TAR_BLOCK_SIZE; cc > 0; cc--) {
+ if (*outName++)
+ return;
+ }
- if (inCc == 0) {
- fprintf (stderr,
- "Unexpected end of file from \"%s\"", tarName);
- errorFlag = TRUE;
- goto done;
- }
+ eofFlag = TRUE;
+
+ return;
}
/*
- * If we are expecting a header block then examine it.
+ * There is another file in the archive to examine.
+ * Extract the encoded information and check it.
*/
- if (inHeader) {
- readHeader ((const TarHeader *) cp, fileCount, fileTable);
+ mode = getOctal(hp->mode, sizeof(hp->mode));
+ uid = getOctal(hp->uid, sizeof(hp->uid));
+ gid = getOctal(hp->gid, sizeof(hp->gid));
+ size = getOctal(hp->size, sizeof(hp->size));
+ mtime = getOctal(hp->mtime, sizeof(hp->mtime));
+ checkSum = getOctal(hp->checkSum, sizeof(hp->checkSum));
+ major = getOctal(hp->devMajor, sizeof(hp->devMajor));
+ minor = getOctal(hp->devMinor, sizeof(hp->devMinor));
+
+ if ((mode < 0) || (uid < 0) || (gid < 0) || (size < 0)) {
+ if (badHeader == FALSE)
+ fprintf(stderr, "Bad tar header, skipping\n");
- cp += TAR_BLOCK_SIZE;
- inCc -= TAR_BLOCK_SIZE;
+ badHeader = TRUE;
- continue;
+ return;
}
+ badHeader = FALSE;
+ skipFileFlag = FALSE;
+ devFileFlag = FALSE;
+
/*
- * We are currently handling the data for a file.
- * Process the minimum of the amount of data we have available
- * and the amount left to be processed for the file.
+ * Check for the file modes.
*/
- cc = inCc;
+ hardLink = ((hp->typeFlag == TAR_TYPE_HARD_LINK) ||
+ (hp->typeFlag == TAR_TYPE_HARD_LINK - '0'));
- if (cc > dataCc)
- cc = dataCc;
+ softLink = ((hp->typeFlag == TAR_TYPE_SOFT_LINK) ||
+ (hp->typeFlag == TAR_TYPE_SOFT_LINK - '0'));
- readData (cp, cc);
+ /*
+ * Check for a directory.
+ */
+ if (outName[strlen(outName) - 1] == '/')
+ mode |= S_IFDIR;
/*
- * If the amount left isn't an exact multiple of the tar block
- * size then round it up to the next block boundary since there
- * is padding at the end of the file.
+ * Check for absolute paths in the file.
+ * If we find any, then warn the user and make them relative.
*/
- if (cc % TAR_BLOCK_SIZE)
- cc += TAR_BLOCK_SIZE - (cc % TAR_BLOCK_SIZE);
+ if (*outName == '/') {
+ while (*outName == '/')
+ outName++;
- cp += cc;
- inCc -= cc;
- }
+ if (warnedRoot == FALSE) {
+ fprintf(stderr,
+ "Absolute path detected, removing leading slashes\n");
+ }
- done:
- /*
- * Close the tar file if needed.
- */
- if ((tarFd >= 0) && (close (tarFd) < 0))
- perror (tarName);
-
- /*
- * Close the output file if needed.
- * This is only done here on a previous error and so no
- * message is required on errors.
- */
- if (tostdoutFlag == FALSE) {
- if (outFd >= 0)
- (void) close (outFd);
- }
+ warnedRoot = TRUE;
+ }
+
+ /*
+ * See if we want this file to be restored.
+ * If not, then set up to skip it.
+ */
+ if (wantFileName(outName, fileCount, fileTable) == FALSE) {
+ if (!hardLink && !softLink && (S_ISREG(mode) || S_ISCHR(mode)
+ || S_ISBLK(mode) || S_ISSOCK(mode)
+ || S_ISFIFO(mode))) {
+ inHeader = (size == 0) ? TRUE : FALSE;
+ dataCc = size;
+ }
+
+ skipFileFlag = TRUE;
+
+ return;
+ }
+
+ /*
+ * This file is to be handled.
+ * If we aren't extracting then just list information about the file.
+ */
+ if (extractFlag == FALSE) {
+ if (verboseFlag == TRUE) {
+ printf("%s %3d/%-d ", modeString(mode), uid, gid);
+ if (S_ISCHR(mode) || S_ISBLK(mode))
+ printf("%4d,%4d %s ", major, minor, timeString(mtime));
+ else
+ printf("%9ld %s ", size, timeString(mtime));
+ }
+ printf("%s", outName);
+
+ if (hardLink)
+ printf(" (link to \"%s\")", hp->linkName);
+ else if (softLink)
+ printf(" (symlink to \"%s\")", hp->linkName);
+ else if (S_ISREG(mode) || S_ISCHR(mode) || S_ISBLK(mode) ||
+ S_ISSOCK(mode) || S_ISFIFO(mode)) {
+ inHeader = (size == 0) ? TRUE : FALSE;
+ dataCc = size;
+ }
+
+ printf("\n");
+
+ return;
+ }
+
+ /*
+ * We really want to extract the file.
+ */
+ if (verboseFlag == TRUE)
+ printf("x %s\n", outName);
+
+ if (hardLink) {
+ if (link(hp->linkName, outName) < 0) {
+ perror(outName);
+ return;
+ }
+ /* Set the file time */
+ utb.actime = mtime;
+ utb.modtime = mtime;
+ utime(outName, &utb);
+ /* Set the file permissions */
+ chown(outName, uid, gid);
+ chmod(outName, mode);
+ return;
+ }
+
+ if (softLink) {
+#ifdef S_ISLNK
+ if (symlink(hp->linkName, outName) < 0) {
+ perror(outName);
+ return;
+ }
+ /* Try to change ownership of the symlink.
+ * If libs doesn't support that, don't bother.
+ * Changing the pointed-to file is the Wrong Thing(tm).
+ */
+#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
+ lchown(outName, uid, gid);
+#endif
+
+ /* Do not change permissions or date on symlink,
+ * since it changes the pointed to file instead. duh. */
+#else
+ fprintf(stderr, "Cannot create symbolic links\n");
+#endif
+ return;
+ }
+
+ /* Set the umask for this process so it doesn't
+ * screw things up. */
+ umask(0);
+
+ /*
+ * If the file is a directory, then just create the path.
+ */
+ if (S_ISDIR(mode)) {
+ if (createPath(outName, mode) == TRUE) {
+ /* Set the file time */
+ utb.actime = mtime;
+ utb.modtime = mtime;
+ utime(outName, &utb);
+ /* Set the file permissions */
+ chown(outName, uid, gid);
+ chmod(outName, mode);
+ return;
+ }
+ return;
+ }
+
+ /*
+ * There is a file to write.
+ * First create the path to it if necessary with default permissions.
+ */
+ createPath(outName, 0777);
+
+ inHeader = (size == 0) ? TRUE : FALSE;
+ dataCc = size;
+
+ /*
+ * Start the output file.
+ */
+ if (tostdoutFlag == TRUE)
+ outFd = fileno(stdout);
+ else {
+ if (S_ISCHR(mode) || S_ISBLK(mode) || S_ISSOCK(mode)) {
+ devFileFlag = TRUE;
+ outFd = mknod(outName, mode, makedev(major, minor));
+ } else if (S_ISFIFO(mode)) {
+ devFileFlag = TRUE;
+ outFd = mkfifo(outName, mode);
+ } else {
+ outFd = open(outName, O_WRONLY | O_CREAT | O_TRUNC, mode);
+ }
+ if (outFd < 0) {
+ perror(outName);
+ skipFileFlag = TRUE;
+ return;
+ }
+ /* Set the file time */
+ utb.actime = mtime;
+ utb.modtime = mtime;
+ utime(outName, &utb);
+ /* Set the file permissions */
+ chown(outName, uid, gid);
+ chmod(outName, mode);
+ }
+
+
+ /*
+ * If the file is empty, then that's all we need to do.
+ */
+ if (size == 0 && (tostdoutFlag == FALSE) && (devFileFlag == FALSE)) {
+ close(outFd);
+ outFd = -1;
+ }
}
/*
- * Examine the header block that was just read.
- * This can specify the information for another file, or it can mark
- * the end of the tar file.
+ * Handle a data block of some specified size that was read.
*/
-static void
-readHeader (const TarHeader * hp, int fileCount, char **fileTable)
+static void readData(const char *cp, int count)
{
- int mode;
- int uid;
- int gid;
- int checkSum;
- long size;
- time_t mtime;
- const char *name;
- int cc;
- int hardLink;
- int softLink;
-
- /*
- * If the block is completely empty, then this is the end of the
- * archive file. If the name is null, then just skip this header.
- */
- name = hp->name;
-
- if (*name == '\0') {
- for (cc = TAR_BLOCK_SIZE; cc > 0; cc--) {
- if (*name++)
+ /*
+ * Reduce the amount of data left in this file.
+ * If there is no more data left, then we need to read
+ * the header again.
+ */
+ dataCc -= count;
+
+ if (dataCc <= 0)
+ inHeader = TRUE;
+
+ /*
+ * If we aren't extracting files or this file is being
+ * skipped then do nothing more.
+ */
+ if (extractFlag == FALSE || skipFileFlag == TRUE)
return;
- }
- eofFlag = TRUE;
-
- return;
- }
-
- /*
- * There is another file in the archive to examine.
- * Extract the encoded information and check it.
- */
- mode = getOctal (hp->mode, sizeof (hp->mode));
- uid = getOctal (hp->uid, sizeof (hp->uid));
- gid = getOctal (hp->gid, sizeof (hp->gid));
- size = getOctal (hp->size, sizeof (hp->size));
- mtime = getOctal (hp->mtime, sizeof (hp->mtime));
- checkSum = getOctal (hp->checkSum, sizeof (hp->checkSum));
-
- if ((mode < 0) || (uid < 0) || (gid < 0) || (size < 0)) {
- if (!badHeader)
- fprintf (stderr, "Bad tar header, skipping\n");
-
- badHeader = TRUE;
-
- return;
- }
-
- badHeader = FALSE;
- skipFileFlag = FALSE;
-
- /*
- * Check for the file modes.
- */
- hardLink = ((hp->typeFlag == TAR_TYPE_HARD_LINK) ||
- (hp->typeFlag == TAR_TYPE_HARD_LINK - '0'));
-
- softLink = ((hp->typeFlag == TAR_TYPE_SOFT_LINK) ||
- (hp->typeFlag == TAR_TYPE_SOFT_LINK - '0'));
-
- /*
- * Check for a directory or a regular file.
- */
- if (name[strlen (name) - 1] == '/')
- mode |= S_IFDIR;
- else if ((mode & S_IFMT) == 0)
- mode |= S_IFREG;
-
- /*
- * Check for absolute paths in the file.
- * If we find any, then warn the user and make them relative.
- */
- if (*name == '/') {
- while (*name == '/')
- name++;
-
- if (!warnedRoot) {
- fprintf (stderr,
- "Absolute path detected, removing leading slashes\n");
+ /*
+ * Write the data to the output file.
+ */
+ if (fullWrite(outFd, cp, count) < 0) {
+ perror(outName);
+ if (tostdoutFlag == FALSE) {
+ close(outFd);
+ outFd = -1;
+ }
+ skipFileFlag = TRUE;
+ return;
}
- warnedRoot = TRUE;
- }
-
- /*
- * See if we want this file to be restored.
- * If not, then set up to skip it.
- */
- if (!wantFileName (name, fileCount, fileTable)) {
- if (!hardLink && !softLink && S_ISREG (mode)) {
- inHeader = (size == 0);
- dataCc = size;
- }
+ /*
+ * Check if we are done writing to the file now.
+ */
+ if (dataCc <= 0 && tostdoutFlag == FALSE) {
+ struct utimbuf utb;
- skipFileFlag = TRUE;
+ if (close(outFd))
+ perror(outName);
- return;
- }
+ /* Set the file time */
+ utb.actime = mtime;
+ utb.modtime = mtime;
+ utime(outName, &utb);
+ /* Set the file permissions */
+ chown(outName, uid, gid);
+ chmod(outName, mode);
- /*
- * This file is to be handled.
- * If we aren't extracting then just list information about the file.
- */
- if (!extractFlag) {
- if (verboseFlag) {
- printf ("%s %3d/%-d %9ld %s %s", modeString (mode),
- uid, gid, size, timeString (mtime), name);
- } else
- printf ("%s", name);
-
- if (hardLink)
- printf (" (link to \"%s\")", hp->linkName);
- else if (softLink)
- printf (" (symlink to \"%s\")", hp->linkName);
- else if (S_ISREG (mode)) {
- inHeader = (size == 0);
- dataCc = size;
+ outFd = -1;
}
+}
- printf ("\n");
- return;
- }
+/*
+ * See if the specified file name belongs to one of the specified list
+ * of path prefixes. An empty list implies that all files are wanted.
+ * Returns TRUE if the file is selected.
+ */
+static int
+wantFileName(const char *fileName, int fileCount, char **fileTable)
+{
+ const char *pathName;
+ int fileLength;
+ int pathLength;
- /*
- * We really want to extract the file.
- */
- if (verboseFlag)
- printf ("x %s\n", name);
+ /*
+ * If there are no files in the list, then the file is wanted.
+ */
+ if (fileCount == 0)
+ return TRUE;
- if (hardLink) {
- if (link (hp->linkName, name) < 0)
- perror (name);
+ fileLength = strlen(fileName);
- return;
- }
+ /*
+ * Check each of the test paths.
+ */
+ while (fileCount-- > 0) {
+ pathName = *fileTable++;
- if (softLink) {
-#ifdef S_ISLNK
- if (symlink (hp->linkName, name) < 0)
- perror (name);
-#else
- fprintf (stderr, "Cannot create symbolic links\n");
-#endif
- return;
- }
-
- /*
- * If the file is a directory, then just create the path.
- */
- if (S_ISDIR (mode)) {
- createPath (name, mode);
-
- return;
- }
-
- /*
- * There is a file to write.
- * First create the path to it if necessary with a default permission.
- */
- createPath (name, 0777);
-
- inHeader = (size == 0);
- dataCc = size;
-
- /*
- * Start the output file.
- */
- if (tostdoutFlag == TRUE)
- outFd = STDOUT;
- else
- outFd = open (name, O_WRONLY | O_CREAT | O_TRUNC, mode);
-
- if (outFd < 0) {
- perror (name);
- skipFileFlag = TRUE;
- return;
- }
-
- /*
- * If the file is empty, then that's all we need to do.
- */
- if (size == 0 && tostdoutFlag == FALSE) {
- (void) close (outFd);
- outFd = -1;
- }
-}
+ pathLength = strlen(pathName);
+
+ if (fileLength < pathLength)
+ continue;
+
+ if (memcmp(fileName, pathName, pathLength) != 0)
+ continue;
+
+ if ((fileLength == pathLength) || (fileName[pathLength] == '/')) {
+ return TRUE;
+ }
+ }
+ return FALSE;
+}
/*
- * Handle a data block of some specified size that was read.
+ * Read an octal value in a field of the specified width, with optional
+ * spaces on both sides of the number and with an optional null character
+ * at the end. Returns -1 on an illegal format.
*/
-static void readData (const char *cp, int count)
+static long getOctal(const char *cp, int len)
{
- /*
- * Reduce the amount of data left in this file.
- * If there is no more data left, then we need to read
- * the header again.
- */
- dataCc -= count;
-
- if (dataCc <= 0)
- inHeader = TRUE;
+ long val;
- /*
- * If we aren't extracting files or this file is being
- * skipped then do nothing more.
- */
- if (!extractFlag || skipFileFlag)
- return;
-
- /*
- * Write the data to the output file.
- */
- if (fullWrite (outFd, cp, count) < 0) {
- perror (outName);
- if (tostdoutFlag == FALSE) {
- (void) close (outFd);
- outFd = -1;
+ while ((len > 0) && (*cp == ' ')) {
+ cp++;
+ len--;
}
- skipFileFlag = TRUE;
- return;
- }
-
- /*
- * If the write failed, close the file and disable further
- * writes to this file.
- */
- if (dataCc <= 0 && tostdoutFlag == FALSE) {
- if (close (outFd))
- perror (outName);
- outFd = -1;
- }
+ if ((len == 0) || !isOctal(*cp))
+ return -1;
+
+ val = 0;
+
+ while ((len > 0) && isOctal(*cp)) {
+ val = val * 8 + *cp++ - '0';
+ len--;
+ }
+
+ while ((len > 0) && (*cp == ' ')) {
+ cp++;
+ len--;
+ }
+
+ if ((len > 0) && *cp)
+ return -1;
+
+ return val;
}
+
+
+/* From here to the end of the file is the tar writing stuff.
+ * If you do not have BB_FEATURE_TAR_CREATE defined, this will
+ * not be built.
+ * */
+#ifdef BB_FEATURE_TAR_CREATE
+
/*
* Write a tar file containing the specified files.
*/
-static void writeTarFile (int fileCount, char **fileTable)
+static void writeTarFile(int fileCount, char **fileTable)
{
- struct stat statbuf;
-
- /*
- * Make sure there is at least one file specified.
- */
- if (fileCount <= 0) {
- fprintf (stderr, "No files specified to be saved\n");
- errorFlag = TRUE;
- }
-
- /*
- * Create the tar file for writing.
- */
- if ((tarName == NULL) || !strcmp (tarName, "-")) {
- tostdoutFlag = TRUE;
- tarFd = STDOUT;
- } else
- tarFd = open (tarName, O_WRONLY | O_CREAT | O_TRUNC, 0666);
-
- if (tarFd < 0) {
- perror (tarName);
- errorFlag = TRUE;
- return;
- }
-
- /*
- * Get the device and inode of the tar file for checking later.
- */
- if (fstat (tarFd, &statbuf) < 0) {
- perror (tarName);
- errorFlag = TRUE;
- goto done;
- }
-
- tarDev = statbuf.st_dev;
- tarInode = statbuf.st_ino;
-
- /*
- * Append each file name into the archive file.
- * Follow symbolic links for these top level file names.
- */
- while (!errorFlag && (fileCount-- > 0)) {
- saveFile (*fileTable++, FALSE);
- }
-
- /*
- * Now write an empty block of zeroes to end the archive.
- */
- writeTarBlock ("", 1);
+ struct stat statbuf;
+
+ /*
+ * Make sure there is at least one file specified.
+ */
+ if (fileCount <= 0) {
+ fprintf(stderr, "No files specified to be saved\n");
+ errorFlag = TRUE;
+ }
+
+ /*
+ * Create the tar file for writing.
+ */
+ if ((tarName == NULL) || !strcmp(tarName, "-")) {
+ tostdoutFlag = TRUE;
+ tarFd = fileno(stdout);
+ } else
+ tarFd = open(tarName, O_WRONLY | O_CREAT | O_TRUNC, 0666);
+
+ if (tarFd < 0) {
+ perror(tarName);
+ errorFlag = TRUE;
+ return;
+ }
+
+ /*
+ * Get the device and inode of the tar file for checking later.
+ */
+ if (fstat(tarFd, &statbuf) < 0) {
+ perror(tarName);
+ errorFlag = TRUE;
+ goto done;
+ }
+
+ tarDev = statbuf.st_dev;
+ tarInode = statbuf.st_ino;
+
+ /*
+ * Append each file name into the archive file.
+ * Follow symbolic links for these top level file names.
+ */
+ while (errorFlag == FALSE && (fileCount-- > 0)) {
+ saveFile(*fileTable++, FALSE);
+ }
+
+ /*
+ * Now write an empty block of zeroes to end the archive.
+ */
+ writeTarBlock("", 1);
done:
- /*
- * Close the tar file and check for errors if it was opened.
- */
- if ((tostdoutFlag == FALSE) && (tarFd >= 0) && (close (tarFd) < 0))
- perror (tarName);
+ /*
+ * Close the tar file and check for errors if it was opened.
+ */
+ if ((tostdoutFlag == FALSE) && (tarFd >= 0) && (close(tarFd) < 0))
+ perror(tarName);
}
-
/*
* Save one file into the tar file.
* If the file is a directory, then this will recursively save all of
* flag indicates whether or not we want to see symbolic links as
* they really are, instead of blindly following them.
*/
-static void saveFile (const char *fileName, int seeLinks)
+static void saveFile(const char *fileName, int seeLinks)
{
- int status;
- int mode;
- struct stat statbuf;
+ int status;
+ struct stat statbuf;
- if (verboseFlag)
- printf ("a %s\n", fileName);
+ if (verboseFlag == TRUE)
+ printf("a %s\n", fileName);
- /*
- * Check that the file name will fit in the header.
- */
- if (strlen (fileName) >= TAR_NAME_SIZE) {
- fprintf (stderr, "%s: File name is too long\n", fileName);
+ /*
+ * Check that the file name will fit in the header.
+ */
+ if (strlen(fileName) >= TAR_NAME_SIZE) {
+ fprintf(stderr, "%s: File name is too long\n", fileName);
- return;
- }
+ return;
+ }
- /*
- * Find out about the file.
- */
+ /*
+ * Find out about the file.
+ */
#ifdef S_ISLNK
- if (seeLinks)
- status = lstat (fileName, &statbuf);
- else
+ if (seeLinks == TRUE)
+ status = lstat(fileName, &statbuf);
+ else
#endif
- status = stat (fileName, &statbuf);
+ status = stat(fileName, &statbuf);
- if (status < 0) {
- perror (fileName);
+ if (status < 0) {
+ perror(fileName);
- return;
- }
+ return;
+ }
- /*
- * Make sure we aren't trying to save our file into itself.
- */
- if ((statbuf.st_dev == tarDev) && (statbuf.st_ino == tarInode)) {
- fprintf (stderr, "Skipping saving of archive file itself\n");
+ /*
+ * Make sure we aren't trying to save our file into itself.
+ */
+ if ((statbuf.st_dev == tarDev) && (statbuf.st_ino == tarInode)) {
+ fprintf(stderr, "Skipping saving of archive file itself\n");
- return;
- }
+ return;
+ }
- /*
- * Check the type of file.
- */
- mode = statbuf.st_mode;
+ /*
+ * Check the type of file.
+ */
+ mode = statbuf.st_mode;
- if (S_ISDIR (mode)) {
- saveDirectory (fileName, &statbuf);
+ if (S_ISDIR(mode)) {
+ saveDirectory(fileName, &statbuf);
- return;
- }
+ return;
+ }
+ if (S_ISREG(mode)) {
+ saveRegularFile(fileName, &statbuf);
- if (S_ISREG (mode)) {
- saveRegularFile (fileName, &statbuf);
+ return;
+ }
- return;
- }
+ /* Some day add support for tarring these up... but not today. :) */
+// if (S_ISLNK(mode) || S_ISFIFO(mode) || S_ISBLK(mode) || S_ISCHR (mode) ) {
+// fprintf (stderr, "%s: This version of tar can't store this type of file\n", fileName);
+// }
- /*
- * The file is a strange type of file, ignore it.
- */
- fprintf (stderr, "%s: not a directory or regular file\n", fileName);
+ /*
+ * The file is a strange type of file, ignore it.
+ */
+ fprintf(stderr, "%s: not a directory or regular file\n", fileName);
}
* Save a regular file to the tar file.
*/
static void
-saveRegularFile (const char *fileName, const struct stat *statbuf)
+saveRegularFile(const char *fileName, const struct stat *statbuf)
{
- int sawEof;
- int fileFd;
- int cc;
- int dataCount;
- long fullDataCount;
- char data[TAR_BLOCK_SIZE * 16];
-
- /*
- * Open the file for reading.
- */
- fileFd = open (fileName, O_RDONLY);
-
- if (fileFd < 0) {
- perror (fileName);
-
- return;
- }
-
- /*
- * Write out the header for the file.
- */
- writeHeader (fileName, statbuf);
-
- /*
- * Write the data blocks of the file.
- * We must be careful to write the amount of data that the stat
- * buffer indicated, even if the file has changed size. Otherwise
- * the tar file will be incorrect.
- */
- fullDataCount = statbuf->st_size;
- sawEof = FALSE;
-
- while (fullDataCount > 0) {
- /*
- * Get the amount to write this iteration which is
- * the minumum of the amount left to write and the
- * buffer size.
- */
- dataCount = sizeof (data);
-
- if (dataCount > fullDataCount)
- dataCount = (int) fullDataCount;
+ int sawEof;
+ int fileFd;
+ int cc;
+ int dataCount;
+ long fullDataCount;
+ char data[TAR_BLOCK_SIZE * 16];
/*
- * Read the data from the file if we haven't seen the
- * end of file yet.
+ * Open the file for reading.
*/
- cc = 0;
-
- if (!sawEof) {
- cc = fullRead (fileFd, data, dataCount);
+ fileFd = open(fileName, O_RDONLY);
- if (cc < 0) {
- perror (fileName);
-
- (void) close (fileFd);
- errorFlag = TRUE;
+ if (fileFd < 0) {
+ perror(fileName);
return;
- }
-
- /*
- * If the file ended too soon, complain and set
- * a flag so we will zero fill the rest of it.
- */
- if (cc < dataCount) {
- fprintf (stderr,
- "%s: Short read - zero filling", fileName);
-
- sawEof = TRUE;
- }
}
/*
- * Zero fill the rest of the data if necessary.
+ * Write out the header for the file.
*/
- if (cc < dataCount)
- memset (data + cc, 0, dataCount - cc);
+ writeHeader(fileName, statbuf);
/*
- * Write the buffer to the TAR file.
+ * Write the data blocks of the file.
+ * We must be careful to write the amount of data that the stat
+ * buffer indicated, even if the file has changed size. Otherwise
+ * the tar file will be incorrect.
*/
- writeTarBlock (data, dataCount);
+ fullDataCount = statbuf->st_size;
+ sawEof = FALSE;
+
+ while (fullDataCount > 0) {
+ /*
+ * Get the amount to write this iteration which is
+ * the minumum of the amount left to write and the
+ * buffer size.
+ */
+ dataCount = sizeof(data);
+
+ if (dataCount > fullDataCount)
+ dataCount = (int) fullDataCount;
+
+ /*
+ * Read the data from the file if we haven't seen the
+ * end of file yet.
+ */
+ cc = 0;
+
+ if (sawEof == FALSE) {
+ cc = fullRead(fileFd, data, dataCount);
+
+ if (cc < 0) {
+ perror(fileName);
+
+ (void) close(fileFd);
+ errorFlag = TRUE;
+
+ return;
+ }
+
+ /*
+ * If the file ended too soon, complain and set
+ * a flag so we will zero fill the rest of it.
+ */
+ if (cc < dataCount) {
+ fprintf(stderr, "%s: Short read - zero filling", fileName);
+
+ sawEof = TRUE;
+ }
+ }
- fullDataCount -= dataCount;
- }
+ /*
+ * Zero fill the rest of the data if necessary.
+ */
+ if (cc < dataCount)
+ memset(data + cc, 0, dataCount - cc);
- /*
- * Close the file.
- */
- if ((tostdoutFlag == FALSE) && close (fileFd) < 0)
- fprintf (stderr, "%s: close: %s\n", fileName, strerror (errno));
+ /*
+ * Write the buffer to the TAR file.
+ */
+ writeTarBlock(data, dataCount);
+
+ fullDataCount -= dataCount;
+ }
+
+ /*
+ * Close the file.
+ */
+ if ((tostdoutFlag == FALSE) && close(fileFd) < 0)
+ fprintf(stderr, "%s: close: %s\n", fileName, strerror(errno));
}
/*
* Save a directory and all of its files to the tar file.
*/
-static void saveDirectory (const char *dirName, const struct stat *statbuf)
+static void saveDirectory(const char *dirName, const struct stat *statbuf)
{
- DIR *dir;
- struct dirent *entry;
- int needSlash;
- char fullName[NAME_MAX];
-
- /*
- * Construct the directory name as used in the tar file by appending
- * a slash character to it.
- */
- strcpy (fullName, dirName);
- strcat (fullName, "/");
-
- /*
- * Write out the header for the directory entry.
- */
- writeHeader (fullName, statbuf);
-
- /*
- * Open the directory.
- */
- dir = opendir (dirName);
-
- if (dir == NULL) {
- fprintf (stderr, "Cannot read directory \"%s\": %s\n",
- dirName, strerror (errno));
-
- return;
- }
-
- /*
- * See if a slash is needed.
- */
- needSlash = (*dirName && (dirName[strlen (dirName) - 1] != '/'));
-
- /*
- * Read all of the directory entries and check them,
- * except for the current and parent directory entries.
- */
- while (!errorFlag && ((entry = readdir (dir)) != NULL)) {
- if ((strcmp (entry->d_name, ".") == 0) ||
- (strcmp (entry->d_name, "..") == 0)) {
- continue;
- }
+ DIR *dir;
+ struct dirent *entry;
+ int needSlash;
+ char fullName[PATH_MAX + 1];
/*
- * Build the full path name to the file.
+ * Construct the directory name as used in the tar file by appending
+ * a slash character to it.
*/
- strcpy (fullName, dirName);
+ strcpy(fullName, dirName);
+ strcat(fullName, "/");
- if (needSlash)
- strcat (fullName, "/");
+ /*
+ * Write out the header for the directory entry.
+ */
+ writeHeader(fullName, statbuf);
+
+ /*
+ * Open the directory.
+ */
+ dir = opendir(dirName);
- strcat (fullName, entry->d_name);
+ if (dir == NULL) {
+ fprintf(stderr, "Cannot read directory \"%s\": %s\n",
+ dirName, strerror(errno));
+
+ return;
+ }
+
+ /*
+ * See if a slash is needed.
+ */
+ needSlash = (*dirName && (dirName[strlen(dirName) - 1] != '/'));
/*
- * Write this file to the tar file, noticing whether or not
- * the file is a symbolic link.
+ * Read all of the directory entries and check them,
+ * except for the current and parent directory entries.
*/
- saveFile (fullName, TRUE);
- }
+ while (errorFlag == FALSE && ((entry = readdir(dir)) != NULL)) {
+ if ((strcmp(entry->d_name, ".") == 0) ||
+ (strcmp(entry->d_name, "..") == 0)) {
+ continue;
+ }
+
+ /*
+ * Build the full path name to the file.
+ */
+ strcpy(fullName, dirName);
+
+ if (needSlash)
+ strcat(fullName, "/");
+
+ strcat(fullName, entry->d_name);
+
+ /*
+ * Write this file to the tar file, noticing whether or not
+ * the file is a symbolic link.
+ */
+ saveFile(fullName, TRUE);
+ }
- /*
- * All done, close the directory.
- */
- closedir (dir);
+ /*
+ * All done, close the directory.
+ */
+ closedir(dir);
}
* Write a tar header for the specified file name and status.
* It is assumed that the file name fits.
*/
-static void writeHeader (const char *fileName, const struct stat *statbuf)
+static void writeHeader(const char *fileName, const struct stat *statbuf)
{
- long checkSum;
- const unsigned char *cp;
- int len;
- TarHeader header;
-
- /*
- * Zero the header block in preparation for filling it in.
- */
- memset ((char *) &header, 0, sizeof (header));
-
- /*
- * Fill in the header.
- */
- strcpy (header.name, fileName);
-
- strncpy (header.magic, TAR_MAGIC, sizeof (header.magic));
- strncpy (header.version, TAR_VERSION, sizeof (header.version));
-
- putOctal (header.mode, sizeof (header.mode), statbuf->st_mode & 0777);
- putOctal (header.uid, sizeof (header.uid), statbuf->st_uid);
- putOctal (header.gid, sizeof (header.gid), statbuf->st_gid);
- putOctal (header.size, sizeof (header.size), statbuf->st_size);
- putOctal (header.mtime, sizeof (header.mtime), statbuf->st_mtime);
-
- header.typeFlag = TAR_TYPE_REGULAR;
-
- /*
- * Calculate and store the checksum.
- * This is the sum of all of the bytes of the header,
- * with the checksum field itself treated as blanks.
- */
- memset (header.checkSum, ' ', sizeof (header.checkSum));
-
- cp = (const unsigned char *) &header;
- len = sizeof (header);
- checkSum = 0;
-
- while (len-- > 0)
- checkSum += *cp++;
-
- putOctal (header.checkSum, sizeof (header.checkSum), checkSum);
-
- /*
- * Write the tar header.
- */
- writeTarBlock ((const char *) &header, sizeof (header));
+ long checkSum;
+ const unsigned char *cp;
+ int len;
+ TarHeader header;
+
+ /*
+ * Zero the header block in preparation for filling it in.
+ */
+ memset((char *) &header, 0, sizeof(header));
+
+ /*
+ * Fill in the header.
+ */
+ strcpy(header.name, fileName);
+
+ strncpy(header.magic, TAR_MAGIC, sizeof(header.magic));
+ strncpy(header.version, TAR_VERSION, sizeof(header.version));
+
+ putOctal(header.mode, sizeof(header.mode), statbuf->st_mode & 0777);
+ putOctal(header.uid, sizeof(header.uid), statbuf->st_uid);
+ putOctal(header.gid, sizeof(header.gid), statbuf->st_gid);
+ putOctal(header.size, sizeof(header.size), statbuf->st_size);
+ putOctal(header.mtime, sizeof(header.mtime), statbuf->st_mtime);
+
+ header.typeFlag = TAR_TYPE_REGULAR;
+
+ /*
+ * Calculate and store the checksum.
+ * This is the sum of all of the bytes of the header,
+ * with the checksum field itself treated as blanks.
+ */
+ memset(header.checkSum, ' ', sizeof(header.checkSum));
+
+ cp = (const unsigned char *) &header;
+ len = sizeof(header);
+ checkSum = 0;
+
+ while (len-- > 0)
+ checkSum += *cp++;
+
+ putOctal(header.checkSum, sizeof(header.checkSum), checkSum);
+
+ /*
+ * Write the tar header.
+ */
+ writeTarBlock((const char *) &header, sizeof(header));
}
* The data is always padded out to a multiple of TAR_BLOCK_SIZE.
* The errorFlag static variable is set on an error.
*/
-static void writeTarBlock (const char *buf, int len)
+static void writeTarBlock(const char *buf, int len)
{
- int partialLength;
- int completeLength;
- char fullBlock[TAR_BLOCK_SIZE];
-
- /*
- * If we had a write error before, then do nothing more.
- */
- if (errorFlag)
- return;
-
- /*
- * Get the amount of complete and partial blocks.
- */
- partialLength = len % TAR_BLOCK_SIZE;
- completeLength = len - partialLength;
-
- /*
- * Write all of the complete blocks.
- */
- if ((completeLength > 0) && !fullWrite (tarFd, buf, completeLength)) {
- perror (tarName);
-
- errorFlag = TRUE;
-
- return;
- }
-
- /*
- * If there are no partial blocks left, we are done.
- */
- if (partialLength == 0)
- return;
-
- /*
- * Copy the partial data into a complete block, and pad the rest
- * of it with zeroes.
- */
- memcpy (fullBlock, buf + completeLength, partialLength);
- memset (fullBlock + partialLength, 0, TAR_BLOCK_SIZE - partialLength);
-
- /*
- * Write the last complete block.
- */
- if (!fullWrite (tarFd, fullBlock, TAR_BLOCK_SIZE)) {
- perror (tarName);
-
- errorFlag = TRUE;
- }
-}
+ int partialLength;
+ int completeLength;
+ char fullBlock[TAR_BLOCK_SIZE];
+ /*
+ * If we had a write error before, then do nothing more.
+ */
+ if (errorFlag == TRUE)
+ return;
-/*
- * Read an octal value in a field of the specified width, with optional
- * spaces on both sides of the number and with an optional null character
- * at the end. Returns -1 on an illegal format.
- */
-static long getOctal (const char *cp, int len)
-{
- long val;
+ /*
+ * Get the amount of complete and partial blocks.
+ */
+ partialLength = len % TAR_BLOCK_SIZE;
+ completeLength = len - partialLength;
- while ((len > 0) && (*cp == ' ')) {
- cp++;
- len--;
- }
+ /*
+ * Write all of the complete blocks.
+ */
+ if ((completeLength > 0) && !fullWrite(tarFd, buf, completeLength)) {
+ perror(tarName);
- if ((len == 0) || !isOctal (*cp))
- return -1;
+ errorFlag = TRUE;
- val = 0;
+ return;
+ }
- while ((len > 0) && isOctal (*cp)) {
- val = val * 8 + *cp++ - '0';
- len--;
- }
+ /*
+ * If there are no partial blocks left, we are done.
+ */
+ if (partialLength == 0)
+ return;
- while ((len > 0) && (*cp == ' ')) {
- cp++;
- len--;
- }
+ /*
+ * Copy the partial data into a complete block, and pad the rest
+ * of it with zeroes.
+ */
+ memcpy(fullBlock, buf + completeLength, partialLength);
+ memset(fullBlock + partialLength, 0, TAR_BLOCK_SIZE - partialLength);
- if ((len > 0) && *cp)
- return -1;
+ /*
+ * Write the last complete block.
+ */
+ if (!fullWrite(tarFd, fullBlock, TAR_BLOCK_SIZE)) {
+ perror(tarName);
- return val;
+ errorFlag = TRUE;
+ }
}
* The number is zero and space padded and possibly null padded.
* Returns TRUE if successful.
*/
-static int putOctal (char *cp, int len, long value)
+static int putOctal(char *cp, int len, long value)
{
- int tempLength;
- char *tempString;
- char tempBuffer[32];
-
- /*
- * Create a string of the specified length with an initial space,
- * leading zeroes and the octal number, and a trailing null.
- */
- tempString = tempBuffer;
-
- sprintf (tempString, " %0*lo", len - 2, value);
-
- tempLength = strlen (tempString) + 1;
-
- /*
- * If the string is too large, suppress the leading space.
- */
- if (tempLength > len) {
- tempLength--;
- tempString++;
- }
-
- /*
- * If the string is still too large, suppress the trailing null.
- */
- if (tempLength > len)
- tempLength--;
-
- /*
- * If the string is still too large, fail.
- */
- if (tempLength > len)
- return FALSE;
-
- /*
- * Copy the string to the field.
- */
- memcpy (cp, tempString, len);
+ int tempLength;
+ char *tempString;
+ char tempBuffer[32];
- return TRUE;
-}
-
-
-/*
- * See if the specified file name belongs to one of the specified list
- * of path prefixes. An empty list implies that all files are wanted.
- * Returns TRUE if the file is selected.
- */
-static int
-wantFileName (const char *fileName, int fileCount, char **fileTable)
-{
- const char *pathName;
- int fileLength;
- int pathLength;
-
- /*
- * If there are no files in the list, then the file is wanted.
- */
- if (fileCount == 0)
- return TRUE;
+ /*
+ * Create a string of the specified length with an initial space,
+ * leading zeroes and the octal number, and a trailing null.
+ */
+ tempString = tempBuffer;
- fileLength = strlen (fileName);
+ sprintf(tempString, " %0*lo", len - 2, value);
- /*
- * Check each of the test paths.
- */
- while (fileCount-- > 0) {
- pathName = *fileTable++;
+ tempLength = strlen(tempString) + 1;
- pathLength = strlen (pathName);
+ /*
+ * If the string is too large, suppress the leading space.
+ */
+ if (tempLength > len) {
+ tempLength--;
+ tempString++;
+ }
- if (fileLength < pathLength)
- continue;
+ /*
+ * If the string is still too large, suppress the trailing null.
+ */
+ if (tempLength > len)
+ tempLength--;
- if (memcmp (fileName, pathName, pathLength) != 0)
- continue;
+ /*
+ * If the string is still too large, fail.
+ */
+ if (tempLength > len)
+ return FALSE;
- if ((fileLength == pathLength) || (fileName[pathLength] == '/')) {
- return TRUE;
- }
- }
+ /*
+ * Copy the string to the field.
+ */
+ memcpy(cp, tempString, len);
- return FALSE;
+ return TRUE;
}
-
-
+#endif
/* END CODE */
projects / oweals / busybox.git / blobdiff