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-rw-r--r--src/sash/cmd_tar.c1277
1 files changed, 0 insertions, 1277 deletions
diff --git a/src/sash/cmd_tar.c b/src/sash/cmd_tar.c
deleted file mode 100644
index 5dd5f21..0000000
--- a/src/sash/cmd_tar.c
+++ /dev/null
@@ -1,1277 +0,0 @@
-/*
- * Copyright (c) 2014 by David I. Bell
- * Permission is granted to use, distribute, or modify this source,
- * provided that this copyright notice remains intact.
- *
- * The "tar" built-in command.
- * This allows creation, extraction, and listing of tar files.
- */
-
-#include "sash.h"
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <dirent.h>
-#include <errno.h>
-
-
-/*
- * Tar file constants.
- */
-#define TAR_BLOCK_SIZE 512
-#define TAR_NAME_SIZE 100
-
-
-/*
- * The POSIX (and basic GNU) tar header format.
- * This structure is always embedded in a TAR_BLOCK_SIZE sized block
- * 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];
-} TarHeader;
-
-
-#define TAR_MAGIC "ustar"
-#define TAR_VERSION "00"
-
-#define TAR_TYPE_REGULAR '0'
-#define TAR_TYPE_HARD_LINK '1'
-#define TAR_TYPE_SOFT_LINK '2'
-
-
-/*
- * Static data.
- */
-static BOOL listFlag;
-static BOOL extractFlag;
-static BOOL createFlag;
-static BOOL verboseFlag;
-
-static BOOL inHeader;
-static BOOL badHeader;
-static BOOL errorFlag;
-static BOOL skipFileFlag;
-static BOOL warnedRoot;
-static BOOL eofFlag;
-static long dataCc;
-static int outFd;
-static char outName[TAR_NAME_SIZE];
-
-
-/*
- * Static data associated with the tar file.
- */
-static const char * tarName;
-static int tarFd;
-static dev_t tarDev;
-static ino_t tarInode;
-
-
-/*
- * Local procedures to restore files from a tar file.
- */
-static BOOL readTarFile(int fileCount, const char ** fileTable);
-static BOOL readData(const char * cp, int count);
-static BOOL createPath(const char * name, int mode);
-static long getOctal(const char * cp, int len);
-
-static BOOL readHeader(const TarHeader * hp,
- int fileCount, const char ** fileTable);
-
-
-/*
- * Local procedures to save files into a tar file.
- */
-static void saveFile(const char * fileName, BOOL seeLinks);
-
-static void saveRegularFile(const char * fileName,
- const struct stat * statbuf);
-
-static void saveDirectory(const char * fileName,
- const struct stat * statbuf);
-
-static BOOL wantFileName(const char * fileName,
- int fileCount, const char ** fileTable);
-
-static void writeHeader(const char * fileName,
- const struct stat * statbuf);
-
-static BOOL writeTarFile(int fileCount, const char ** fileTable);
-static void writeTarBlock(const char * buf, int len);
-static BOOL putOctal(char * cp, int len, long value);
-
-
-
-int
-do_tar(int argc, const char ** argv)
-{
- const char * options;
- BOOL successFlag;
-
- argc--;
- argv++;
-
- if (argc < 2)
- {
- fprintf(stderr, "Too few arguments for tar\n");
-
- return 1;
- }
-
- extractFlag = FALSE;
- createFlag = FALSE;
- listFlag = FALSE;
- verboseFlag = FALSE;
- tarName = NULL;
- tarDev = 0;
- tarInode = 0;
- tarFd = -1;
-
- /*
- * Parse the options.
- */
- options = *argv++;
- argc--;
-
- for (; *options; options++)
- {
- switch (*options)
- {
- case 'f':
- if (tarName != NULL)
- {
- fprintf(stderr, "Only one 'f' option allowed\n");
-
- return 1;
- }
-
- tarName = *argv++;
- argc--;
-
- break;
-
- case 't':
- listFlag = TRUE;
- break;
-
- case 'x':
- extractFlag = TRUE;
- break;
-
- case 'c':
- createFlag = TRUE;
- break;
-
- case 'v':
- verboseFlag = TRUE;
- break;
-
- default:
- fprintf(stderr, "Unknown tar flag '%c'\n", *options);
-
- return 1;
- }
- }
-
- /*
- * Validate the options.
- */
- if (extractFlag + listFlag + createFlag != 1)
- {
- fprintf(stderr, "Exactly one of 'c', 'x' or 't' must be specified\n");
-
- return 1;
- }
-
- if (tarName == NULL)
- {
- fprintf(stderr, "The 'f' flag must be specified\n");
-
- return 1;
- }
-
- /*
- * Do the correct type of action supplying the rest of the
- * command line arguments as the list of files to process.
- */
- if (createFlag)
- successFlag = writeTarFile(argc, argv);
- else
- successFlag = readTarFile(argc, argv);
-
- return !successFlag;
-}
-
-
-/*
- * 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.
- * Returns TRUE on success.
- */
-static BOOL
-readTarFile(int fileCount, const char ** fileTable)
-{
- const char * cp;
- BOOL successFlag;
- int cc;
- int inCc;
- int blockSize;
- char buf[BUF_SIZE];
-
- skipFileFlag = FALSE;
- badHeader = FALSE;
- warnedRoot = FALSE;
- eofFlag = FALSE;
- inHeader = TRUE;
- successFlag = TRUE;
-
- inCc = 0;
- dataCc = 0;
- outFd = -1;
- blockSize = sizeof(buf);
- cp = buf;
-
- /*
- * Open the tar file for reading.
- */
- tarFd = open(tarName, O_RDONLY);
-
- if (tarFd < 0)
- {
- perror(tarName);
-
- return 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 (!intFlag && !eofFlag)
- {
- /*
- * 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);
- successFlag = FALSE;
-
- goto done;
- }
-
- if (inCc == 0)
- {
- fprintf(stderr,
- "Unexpected end of file from \"%s\"",
- tarName);
- successFlag = FALSE;
-
- goto done;
- }
- }
-
- /*
- * If we are expecting a header block then examine it.
- */
- if (inHeader)
- {
- if (!readHeader((const TarHeader *) cp, fileCount, fileTable))
- successFlag = FALSE;
-
- cp += TAR_BLOCK_SIZE;
- inCc -= TAR_BLOCK_SIZE;
-
- continue;
- }
-
- /*
- * 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;
-
- if (cc > dataCc)
- cc = dataCc;
-
- if (!readData(cp, cc))
- successFlag = FALSE;
-
- /*
- * 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);
-
- cp += cc;
- inCc -= cc;
- }
-
- /*
- * Check for an interrupt.
- */
- if (intFlag)
- {
- fprintf(stderr, "Interrupted - aborting\n");
- successFlag = FALSE;
- }
-
-done:
- /*
- * Close the tar file if needed.
- */
- if ((tarFd >= 0) && (close(tarFd) < 0))
- {
- perror(tarName);
- successFlag = 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 (outFd >= 0)
- (void) close(outFd);
-
- return successFlag;
-}
-
-
-/*
- * 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. Returns TRUE on success.
- */
-static BOOL
-readHeader(const TarHeader * hp, int fileCount, const char ** fileTable)
-{
- int mode;
- int uid;
- int gid;
- long size;
- time_t mtime;
- const char * name;
- int cc;
- BOOL hardLink;
- BOOL 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++)
- return TRUE;
- }
-
- eofFlag = TRUE;
-
- return TRUE;
- }
-
- /*
- * 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));
-
- if ((mode < 0) || (uid < 0) || (gid < 0) || (size < 0))
- {
- if (!badHeader)
- fprintf(stderr, "Bad tar header, skipping\n");
-
- badHeader = TRUE;
-
- return FALSE;
- }
-
- 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");
- }
-
- 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;
- }
-
- skipFileFlag = TRUE;
-
- return TRUE;
- }
-
- /*
- * 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;
- }
-
- printf("\n");
-
- return TRUE;
- }
-
- /*
- * We really want to extract the file.
- */
- if (verboseFlag)
- printf("x %s\n", name);
-
- if (hardLink)
- {
- if (link(hp->linkName, name) < 0)
- {
- perror(name);
- return FALSE;
- }
-
- return TRUE;
- }
-
- if (softLink)
- {
-#ifdef S_ISLNK
- if (symlink(hp->linkName, name) < 0)
- {
- perror(name);
-
- return FALSE;
- }
-
- return TRUE;
-#else
- fprintf(stderr, "Cannot create symbolic links\n");
-#endif
- return FALSE;
- }
-
- /*
- * If the file is a directory, then just create the path.
- */
- if (S_ISDIR(mode))
- return createPath(name, mode);
-
- /*
- * There is a file to write.
- * First create the path to it if necessary with a default permission.
- */
- if (!createPath(name, 0777))
- return FALSE;
-
- inHeader = (size == 0);
- dataCc = size;
-
- /*
- * Start the output file.
- */
- outFd = open(name, O_WRONLY | O_CREAT | O_TRUNC, mode);
-
- if (outFd < 0)
- {
- perror(name);
- skipFileFlag = TRUE;
-
- return FALSE;
- }
-
- /*
- * If the file is empty, then that's all we need to do.
- */
- if (size == 0)
- {
- (void) close(outFd);
- outFd = -1;
- }
-
- return TRUE;
-}
-
-
-/*
- * Handle a data block of some specified size that was read.
- * Returns TRUE on success.
- */
-static BOOL
-readData(const char * cp, int count)
-{
- /*
- * 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 || skipFileFlag)
- return TRUE;
-
- /*
- * Write the data to the output file.
- */
- if (fullWrite(outFd, cp, count) < 0)
- {
- perror(outName);
- (void) close(outFd);
- outFd = -1;
- skipFileFlag = TRUE;
-
- return FALSE;
- }
-
- /*
- * If the write failed, close the file and disable further
- * writes to this file.
- */
- if (dataCc <= 0)
- {
- if (close(outFd))
- perror(outName);
-
- outFd = -1;
-
- return FALSE;
- }
-
- return TRUE;
-}
-
-
-/*
- * Write a tar file containing the specified files.
- * Returns TRUE on success.
- */
-static BOOL
-writeTarFile(int fileCount, const char ** fileTable)
-{
- struct stat statbuf;
- BOOL successFlag;
-
- successFlag = TRUE;
- errorFlag = FALSE;
-
- /*
- * Make sure there is at least one file specified.
- */
- if (fileCount <= 0)
- {
- fprintf(stderr, "No files specified to be saved\n");
-
- return FALSE;
- }
-
- /*
- * Create the tar file for writing.
- */
- tarFd = open(tarName, O_WRONLY | O_CREAT | O_TRUNC, 0666);
-
- if (tarFd < 0)
- {
- perror(tarName);
-
- return FALSE;
- }
-
- /*
- * Get the device and inode of the tar file for checking later.
- */
- if (fstat(tarFd, &statbuf) < 0)
- {
- perror(tarName);
- successFlag = FALSE;
-
- 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 (!intFlag && !errorFlag && (fileCount-- > 0))
- {
- saveFile(*fileTable++, FALSE);
- }
-
- if (intFlag)
- {
- fprintf(stderr, "Interrupted - aborting archiving\n");
- successFlag = 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 ((tarFd >= 0) && (close(tarFd) < 0))
- {
- perror(tarName);
- successFlag = FALSE;
- }
-
- return successFlag;
-}
-
-
-/*
- * Save one file into the tar file.
- * If the file is a directory, then this will recursively save all of
- * the files and directories within the directory. The seeLinks
- * 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, BOOL seeLinks)
-{
- int status;
- int mode;
- struct stat statbuf;
-
- if (verboseFlag)
- 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);
-
- return;
- }
-
- /*
- * Find out about the file.
- */
-#ifdef S_ISLNK
- if (seeLinks)
- status = lstat(fileName, &statbuf);
- else
-#endif
- status = stat(fileName, &statbuf);
-
- if (status < 0)
- {
- perror(fileName);
-
- 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");
-
- return;
- }
-
- /*
- * Check the type of file.
- */
- mode = statbuf.st_mode;
-
- if (S_ISDIR(mode))
- {
- saveDirectory(fileName, &statbuf);
-
- return;
- }
-
- if (S_ISREG(mode))
- {
- saveRegularFile(fileName, &statbuf);
-
- return;
- }
-
- /*
- * 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)
-{
- BOOL 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 (!intFlag && (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)
- {
- 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;
- }
- }
-
- /*
- * Zero fill the rest of the data if necessary.
- */
- if (cc < dataCount)
- memset(data + cc, 0, dataCount - cc);
-
- /*
- * Write the buffer to the TAR file.
- */
- writeTarBlock(data, dataCount);
-
- fullDataCount -= dataCount;
- }
-
- /*
- * Close the file.
- */
- if (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)
-{
- DIR * dir;
- struct dirent * entry;
- BOOL needSlash;
- char fullName[PATH_LEN];
-
- /*
- * 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 (!intFlag && !errorFlag && ((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);
-}
-
-
-/*
- * 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)
-{
- 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));
-}
-
-
-/*
- * Write data to one or more blocks of the tar file.
- * 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)
-{
- 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;
- }
-}
-
-
-/*
- * Attempt to create the directories along the specified path, except for
- * the final component. The mode is given for the final directory only,
- * while all previous ones get default protections. Errors are not reported
- * here, as failures to restore files can be reported later.
- * Returns TRUE on success.
- */
-static BOOL
-createPath(const char * name, int mode)
-{
- char * cp;
- char * cpOld;
- char buf[TAR_NAME_SIZE];
-
- strcpy(buf, name);
-
- cp = strchr(buf, '/');
-
- while (cp)
- {
- cpOld = cp;
- cp = strchr(cp + 1, '/');
-
- *cpOld = '\0';
-
- if (mkdir(buf, cp ? 0777 : mode) == 0)
- printf("Directory \"%s\" created\n", buf);
-
- *cpOld = '/';
- }
-
- return TRUE;
-}
-
-
-/*
- * 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;
-
- while ((len > 0) && (*cp == ' '))
- {
- cp++;
- len--;
- }
-
- 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;
-}
-
-
-/*
- * Put an octal string into the specified buffer.
- * The number is zero and space padded and possibly null padded.
- * Returns TRUE if successful.
- */
-static BOOL
-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);
-
- 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 BOOL
-wantFileName(const char * fileName, int fileCount, const 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;
-
- fileLength = strlen(fileName);
-
- /*
- * Check each of the test paths.
- */
- while (fileCount-- > 0)
- {
- pathName = *fileTable++;
-
- pathLength = strlen(pathName);
-
- if (fileLength < pathLength)
- continue;
-
- if (memcmp(fileName, pathName, pathLength) != 0)
- continue;
-
- if ((fileLength == pathLength) ||
- (fileName[pathLength] == '/'))
- {
- return TRUE;
- }
- }
-
- return FALSE;
-}
-
-/* END CODE */
generated by cgit v1.2.3 (git 2.39.1) at 2025-04-29 18:54:07 +0000