* ground up. It still has remnents of the old code lying about, but it is
* very different now (i.e. cleaner, less global variables, etc)
*
- * Copyright (C) 2000 by Lineo, inc.
+ * Copyright (C) 1999,2000,2001 by Lineo, inc.
* Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
*
* Based in part in the tar implementation in sash
*/
-#include "internal.h"
+#include "busybox.h"
#define BB_DECLARE_EXTERN
#define bb_need_io_error
+#define bb_need_name_longer_than_foo
#include "messages.c"
#include <stdio.h>
#include <dirent.h>
#include <sys/types.h>
#include <sys/sysmacros.h>
#include <getopt.h>
+#include <fnmatch.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#ifdef BB_FEATURE_TAR_GZIP
+extern int unzip(int in, int out);
+extern int gunzip_init();
+#endif
/* Tar file constants */
#ifndef MAJOR
#define MINOR(dev) ((dev)&0xff)
#endif
+enum { NAME_SIZE = 100 }; /* because gcc won't let me use 'static const int' */
/* POSIX tar Header Block, from POSIX 1003.1-1990 */
struct TarHeader
{
/* byte offset */
- char name[100]; /* 0-99 */
+ char name[NAME_SIZE]; /* 0-99 */
char mode[8]; /* 100-107 */
char uid[8]; /* 108-115 */
char gid[8]; /* 116-123 */
char mtime[12]; /* 136-147 */
char chksum[8]; /* 148-155 */
char typeflag; /* 156-156 */
- char linkname[100]; /* 157-256 */
+ char linkname[NAME_SIZE]; /* 157-256 */
char magic[6]; /* 257-262 */
char version[2]; /* 263-264 */
char uname[32]; /* 265-296 */
/* A few useful constants */
#define TAR_MAGIC "ustar" /* ustar and a null */
#define TAR_VERSION " " /* Be compatable with GNU tar format */
-#define TAR_MAGIC_LEN 6
-#define TAR_VERSION_LEN 2
-#define TAR_BLOCK_SIZE 512
+static const int TAR_MAGIC_LEN = 6;
+static const int TAR_VERSION_LEN = 2;
+static const int TAR_BLOCK_SIZE = 512;
/* A nice enum with all the possible tar file content types */
enum TarFileType
DIRTYPE = '5', /* directory */
FIFOTYPE = '6', /* FIFO special */
CONTTYPE = '7', /* reserved */
+ GNULONGLINK = 'K', /* GNU long (>100 chars) link name */
+ GNULONGNAME = 'L', /* GNU long (>100 chars) file name */
};
typedef enum TarFileType TarFileType;
typedef struct TarInfo TarInfo;
/* Local procedures to restore files from a tar file. */
-static int readTarFile(const char* tarName, int extractFlag, int listFlag,
+extern int readTarFile(int tarFd, int extractFlag, int listFlag,
int tostdoutFlag, int verboseFlag, char** extractList,
char** excludeList);
-
-
#ifdef BB_FEATURE_TAR_CREATE
/* Local procedures to save files into a tar file. */
-static int writeTarFile(const char* tarName, int tostdoutFlag,
- int verboseFlag, int argc, char **argv, char** excludeList);
+static int writeTarFile(const char* tarName, int verboseFlag, char **argv,
+ char** excludeList);
+#endif
+
+#ifdef BB_FEATURE_TAR_GZIP
+/* Signal handler for when child gzip process dies... */
+void child_died()
+{
+ fflush(stdout);
+ fflush(stderr);
+ exit(EXIT_FAILURE);
+}
+
+extern int tar_unzip_init(int tarFd)
+{
+ int child_pid;
+ static int unzip_pipe[2];
+ /* Cope if child dies... Otherwise we block forever in read()... */
+ signal(SIGCHLD, child_died);
+
+ if (pipe(unzip_pipe)!=0)
+ error_msg_and_die("pipe error");
+
+ if ( (child_pid = fork()) == -1)
+ error_msg_and_die("fork failure");
+
+ if (child_pid==0) {
+ /* child process */
+ close(unzip_pipe[0]);
+ gunzip_init();
+ unzip(tarFd, unzip_pipe[1]);
+ exit(EXIT_SUCCESS);
+ }
+ else {
+ /* return fd of uncompressed data to parent process */
+ close(unzip_pipe[1]);
+ return(unzip_pipe[0]);
+ }
+}
+#endif
+
+#if defined BB_FEATURE_TAR_EXCLUDE
+struct option longopts[] = {
+ { "exclude", 1, NULL, 'e' },
+ { NULL, 0, NULL, 0 }
+};
#endif
extern int tar_main(int argc, char **argv)
{
char** excludeList=NULL;
+ char** extractList=NULL;
+ const char *tarName="-";
#if defined BB_FEATURE_TAR_EXCLUDE
int excludeListSize=0;
+ FILE *fileList;
+ char file[256];
+#endif
+#if defined BB_FEATURE_TAR_GZIP
+ int unzipFlag = FALSE;
#endif
- const char *tarName="-";
int listFlag = FALSE;
int extractFlag = FALSE;
int createFlag = FALSE;
int verboseFlag = FALSE;
int tostdoutFlag = FALSE;
- int stopIt;
-
+ int status = FALSE;
+ int opt;
if (argc <= 1)
usage(tar_usage);
- /* do normal option parsing */
- while (--argc > 0 && strspn(*(++argv), "-cxt") >0 ) {
- stopIt=FALSE;
- while (stopIt==FALSE && *argv && **argv) {
- switch (**argv) {
- case 'c':
- if (extractFlag == TRUE || listFlag == TRUE)
- goto flagError;
- createFlag = TRUE;
- break;
- case 'x':
- if (listFlag == TRUE || createFlag == TRUE)
- goto flagError;
- extractFlag = TRUE;
- break;
- case 't':
- if (extractFlag == TRUE || createFlag == TRUE)
- goto flagError;
- listFlag = TRUE;
- break;
- case 'v':
- verboseFlag = TRUE;
- break;
- case 'O':
- tostdoutFlag = TRUE;
- tarName = "-";
- break;
- case 'f':
- if (--argc == 0) {
- fatalError( "Option requires an argument: No file specified\n");
- }
- if (*tarName != '-')
- fatalError( "Only one 'f' option allowed\n");
- tarName = *(++argv);
- if (tarName == NULL)
- fatalError( "Option requires an argument: No file specified\n");
- if (!strcmp(tarName, "-") && createFlag == TRUE)
- tostdoutFlag = TRUE;
- stopIt=TRUE;
- break;
+ if (argv[1][0] != '-') {
+ char *tmp = xmalloc(strlen(argv[1]) + 2);
+ tmp[0] = '-';
+ strcpy(tmp + 1, argv[1]);
+ argv[1] = tmp;
+ }
+
+ while (
+#ifndef BB_FEATURE_TAR_EXCLUDE
+ (opt = getopt(argc, argv, "cxtzvOf:"))
+#else
+ (opt = getopt_long(argc, argv, "cxtzvOf:X:", longopts, NULL))
+#endif
+ > 0) {
+ switch (opt) {
+ case 'c':
+ if (extractFlag == TRUE || listFlag == TRUE)
+ goto flagError;
+ createFlag = TRUE;
+ break;
+ case 'x':
+ if (listFlag == TRUE || createFlag == TRUE)
+ goto flagError;
+ extractFlag = TRUE;
+ break;
+ case 't':
+ if (extractFlag == TRUE || createFlag == TRUE)
+ goto flagError;
+ listFlag = TRUE;
+ break;
+#ifdef BB_FEATURE_TAR_GZIP
+ case 'z':
+ unzipFlag = TRUE;
+ break;
+#endif
+ case 'v':
+ verboseFlag = TRUE;
+ break;
+ case 'O':
+ tostdoutFlag = TRUE;
+ break;
+ case 'f':
+ if (*tarName != '-')
+ error_msg_and_die( "Only one 'f' option allowed");
+ tarName = optarg;
+ break;
#if defined BB_FEATURE_TAR_EXCLUDE
- case 'e':
- if (strcmp(*argv, "-exclude")==0) {
- if (--argc == 0) {
- fatalError( "Option requires an argument: No file specified\n");
- }
- excludeList=xrealloc( excludeList, sizeof(char**) * (excludeListSize+2));
- excludeList[excludeListSize] = *(++argv);
- /* Remove leading "/"s */
- if (*excludeList[excludeListSize] =='/')
- excludeList[excludeListSize] = (excludeList[excludeListSize])+1;
- /* Tack a NULL onto the end of the list */
- excludeList[++excludeListSize] = NULL;
- stopIt=TRUE;
- break;
- }
+ case 'e':
+ excludeList=xrealloc( excludeList,
+ sizeof(char *) * (excludeListSize+2));
+ excludeList[excludeListSize] = optarg;
+ /* Tack a NULL onto the end of the list */
+ excludeList[++excludeListSize] = NULL;
+ case 'X':
+ fileList = xfopen(optarg, "r");
+ while (fgets(file, sizeof(file), fileList) != NULL) {
+ excludeList = xrealloc(excludeList,
+ sizeof(char *) * (excludeListSize+2));
+ if (file[strlen(file)-1] == '\n')
+ file[strlen(file)-1] = '\0';
+ excludeList[excludeListSize] = xstrdup(file);
+ /* Tack a NULL onto the end of the list */
+ excludeList[++excludeListSize] = NULL;
+ }
+ fclose(fileList);
+ break;
#endif
- case '-':
- break;
default:
usage(tar_usage);
- }
- ++(*argv);
}
}
- /*
+ /*
* 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
- fatalError( "This version of tar was not compiled with tar creation support.\n");
+ error_msg_and_die( "This version of tar was not compiled with tar creation support.");
#else
- exit(writeTarFile(tarName, tostdoutFlag, verboseFlag, argc, argv, excludeList));
+#ifdef BB_FEATURE_TAR_GZIP
+ if (unzipFlag==TRUE)
+ error_msg_and_die("Creation of compressed not internally support by tar, pipe to busybox gunzip");
+#endif
+ status = writeTarFile(tarName, verboseFlag, argv + optind, excludeList);
#endif
}
if (listFlag == TRUE || extractFlag == TRUE) {
- exit(readTarFile(tarName, extractFlag, listFlag, tostdoutFlag, verboseFlag, &argv[optind], excludeList));
+ int tarFd;
+ if (argv[optind])
+ extractList = argv + optind;
+ /* Open the tar file for reading. */
+ if (!strcmp(tarName, "-"))
+ tarFd = fileno(stdin);
+ else
+ tarFd = open(tarName, O_RDONLY);
+ if (tarFd < 0)
+ perror_msg_and_die("Error opening '%s'", tarName);
+
+#ifdef BB_FEATURE_TAR_GZIP
+ /* unzip tarFd in a seperate process */
+ if (unzipFlag == TRUE)
+ tarFd = tar_unzip_init(tarFd);
+#endif
+ status = readTarFile(tarFd, extractFlag, listFlag, tostdoutFlag,
+ verboseFlag, extractList, excludeList);
}
+ if (status == TRUE)
+ return EXIT_SUCCESS;
+ else
+ return EXIT_FAILURE;
+
flagError:
- fatalError( "Exactly one of 'c', 'x' or 't' must be specified\n");
+ error_msg_and_die( "Exactly one of 'c', 'x' or 't' must be specified");
}
static void
if (extractFlag==TRUE && tostdoutFlag==FALSE) {
/* Create the path to the file, just in case it isn't there...
* This should not screw up path permissions or anything. */
- createPath(header->name, 0777);
+ create_path(header->name, 0777);
if ((outFd=open(header->name, O_CREAT|O_TRUNC|O_WRONLY,
header->mode & ~S_IFMT)) < 0) {
- errorMsg(io_error, header->name, strerror(errno));
+ error_msg(io_error, header->name, strerror(errno));
return( FALSE);
}
}
readSize = size;
writeSize = size;
}
- if ( (readSize = fullRead(header->tarFd, buffer, readSize)) <= 0 ) {
+ if ( (readSize = full_read(header->tarFd, buffer, readSize)) <= 0 ) {
/* Tarball seems to have a problem */
- errorMsg("Unexpected EOF in archive\n");
+ error_msg("Unexpected EOF in archive");
return( FALSE);
}
if ( readSize < writeSize )
/* Write out the file, if we are supposed to be doing that */
if (extractFlag==TRUE) {
- if ((actualWriteSz=fullWrite(outFd, buffer, writeSize)) != writeSize ) {
+ if ((actualWriteSz=full_write(outFd, buffer, writeSize)) != writeSize ) {
/* Output file seems to have a problem */
- errorMsg(io_error, header->name, strerror(errno));
+ error_msg(io_error, header->name, strerror(errno));
return( FALSE);
}
} else {
if (extractFlag==FALSE || tostdoutFlag==TRUE)
return( TRUE);
- if (createPath(header->name, header->mode) != TRUE) {
- errorMsg("%s: Cannot mkdir: %s\n",
- header->name, strerror(errno));
+ if (create_path(header->name, header->mode) != TRUE) {
+ perror_msg("%s: Cannot mkdir", header->name);
return( FALSE);
}
/* make the final component, just in case it was
- * omitted by createPath() (which will skip the
+ * omitted by create_path() (which will skip the
* directory if it doesn't have a terminating '/') */
- if (mkdir(header->name, header->mode) == 0) {
- fixUpPermissions(header);
+ if (mkdir(header->name, header->mode) < 0 && errno != EEXIST) {
+ perror_msg("%s", header->name);
+ return FALSE;
}
+
+ fixUpPermissions(header);
return( TRUE);
}
return( TRUE);
if (link(header->linkname, header->name) < 0) {
- errorMsg("%s: Cannot create hard link to '%s': %s\n",
- header->name, header->linkname, strerror(errno));
+ perror_msg("%s: Cannot create hard link to '%s'", header->name,
+ header->linkname);
return( FALSE);
}
#ifdef S_ISLNK
if (symlink(header->linkname, header->name) < 0) {
- errorMsg("%s: Cannot create symlink to '%s': %s\n",
- header->name, header->linkname, strerror(errno));
+ perror_msg("%s: Cannot create symlink to '%s'", header->name,
+ header->linkname);
return( FALSE);
}
/* Try to change ownership of the symlink.
/* Do not change permissions or date on symlink,
* since it changes the pointed to file instead. duh. */
#else
- errorMsg("%s: Cannot create symlink to '%s': %s\n",
+ error_msg("%s: Cannot create symlink to '%s': %s",
header->name, header->linkname,
"symlinks not supported");
#endif
if (S_ISCHR(header->mode) || S_ISBLK(header->mode) || S_ISSOCK(header->mode)) {
if (mknod(header->name, header->mode, makedev(header->devmajor, header->devminor)) < 0) {
- errorMsg("%s: Cannot mknod: %s\n",
- header->name, strerror(errno));
+ perror_msg("%s: Cannot mknod", header->name);
return( FALSE);
}
} else if (S_ISFIFO(header->mode)) {
if (mkfifo(header->name, header->mode) < 0) {
- errorMsg("%s: Cannot mkfifo: %s\n",
- header->name, strerror(errno));
+ perror_msg("%s: Cannot mkfifo", header->name);
return( FALSE);
}
}
long val = 0;
for(;(size > 0) && (*cp == ' '); cp++, size--);
- if ((size == 0) || !isOctal(*cp))
+ if ((size == 0) || !is_octal(*cp))
return -1;
- for(; (size > 0) && isOctal(*cp); size--) {
+ for(; (size > 0) && is_octal(*cp); size--) {
val = val * 8 + *cp++ - '0';
}
for (;(size > 0) && (*cp == ' '); cp++, size--);
++*(header->name);
if (alreadyWarned == FALSE) {
- errorMsg("Removing leading '/' from member names\n");
+ error_msg("Removing leading '/' from member names");
alreadyWarned = TRUE;
}
}
return( FALSE);
}
+int exclude_file(char **excluded_files, const char *file)
+{
+ int i;
+
+ if (excluded_files == NULL)
+ return 0;
+
+ for (i = 0; excluded_files[i] != NULL; i++) {
+ if (excluded_files[i][0] == '/') {
+ if (fnmatch(excluded_files[i], file,
+ FNM_PATHNAME | FNM_LEADING_DIR) == 0)
+ return 1;
+ } else {
+ const char *p;
+
+ for (p = file; p[0] != '\0'; p++) {
+ if ((p == file || p[-1] == '/') && p[0] != '/' &&
+ fnmatch(excluded_files[i], p,
+ FNM_PATHNAME | FNM_LEADING_DIR) == 0)
+ return 1;
+ }
+ }
+ }
+
+ return 0;
+}
+
+int extract_file(char **extract_files, const char *file)
+{
+ int i;
+
+ if (extract_files == NULL)
+ return 1;
+
+ for (i = 0; extract_files[i] != NULL; i++) {
+ if (fnmatch(extract_files[i], file, FNM_LEADING_DIR) == 0)
+ return 1;
+ }
+
+ return 0;
+}
/*
* 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 int readTarFile(const char* tarName, int extractFlag, int listFlag,
+extern int readTarFile(int tarFd, int extractFlag, int listFlag,
int tostdoutFlag, int verboseFlag, char** extractList,
char** excludeList)
{
- int status, tarFd=-1;
+ int status;
int errorFlag=FALSE;
+ int skipNextHeaderFlag=FALSE;
TarHeader rawHeader;
TarInfo header;
- char** tmpList;
-
- /* Open the tar file for reading. */
- if (!strcmp(tarName, "-"))
- tarFd = fileno(stdin);
- else
- tarFd = open(tarName, O_RDONLY);
- if (tarFd < 0) {
- errorMsg( "Error opening '%s': %s\n", tarName, strerror(errno));
- return ( FALSE);
- }
/* Set the umask for this process so it doesn't
* screw up permission setting for us later. */
umask(0);
/* Read the tar file, and iterate over it one file at a time */
- while ( (status = fullRead(tarFd, (char*)&rawHeader, TAR_BLOCK_SIZE)) == TAR_BLOCK_SIZE ) {
+ while ( (status = full_read(tarFd, (char*)&rawHeader, TAR_BLOCK_SIZE)) == TAR_BLOCK_SIZE ) {
- /* First, try to read the header */
+ /* Try to read the header */
if ( readTarHeader(&rawHeader, &header) == FALSE ) {
if ( *(header.name) == '\0' ) {
goto endgame;
} else {
errorFlag=TRUE;
- errorMsg("Bad tar header, skipping\n");
+ error_msg("Bad tar header, skipping");
continue;
}
}
goto endgame;
header.tarFd = tarFd;
+ /* Skip funky extra GNU headers that precede long files */
+ if ( (header.type == GNULONGNAME) || (header.type == GNULONGLINK) ) {
+ skipNextHeaderFlag=TRUE;
+ if (tarExtractRegularFile(&header, FALSE, FALSE) == FALSE)
+ errorFlag = TRUE;
+ continue;
+ }
+ if ( skipNextHeaderFlag == TRUE ) {
+ skipNextHeaderFlag=FALSE;
+ error_msg(name_longer_than_foo, NAME_SIZE);
+ if (tarExtractRegularFile(&header, FALSE, FALSE) == FALSE)
+ errorFlag = TRUE;
+ continue;
+ }
+
#if defined BB_FEATURE_TAR_EXCLUDE
- {
- int skipFlag=FALSE;
- /* Check for excluded files.... */
- for (tmpList=excludeList; tmpList && *tmpList; tmpList++) {
- /* Do some extra hoop jumping for when directory names
- * end in '/' but the entry in tmpList doesn't */
- if (strncmp( *tmpList, header.name, strlen(*tmpList))==0 || (
- header.name[strlen(header.name)-1]=='/'
- && strncmp( *tmpList, header.name,
- MIN(strlen(header.name)-1, strlen(*tmpList)))==0)) {
- /* If it is a regular file, pretend to extract it with
- * the extractFlag set to FALSE, so the junk in the tarball
- * is properly skipped over */
- if ( header.type==REGTYPE || header.type==REGTYPE0 ) {
- tarExtractRegularFile(&header, FALSE, FALSE);
- }
- skipFlag=TRUE;
- break;
- }
- }
+ if (exclude_file(excludeList, header.name)) {
/* There are not the droids you're looking for, move along */
- if (skipFlag==TRUE)
- continue;
+ /* If it is a regular file, pretend to extract it with
+ * the extractFlag set to FALSE, so the junk in the tarball
+ * is properly skipped over */
+ if ( header.type==REGTYPE || header.type==REGTYPE0 ) {
+ if (tarExtractRegularFile(&header, FALSE, FALSE) == FALSE)
+ errorFlag = TRUE;
+ }
+ continue;
}
#endif
- if (*extractList != NULL) {
- int skipFlag = TRUE;
- for (tmpList = extractList; *tmpList != NULL; tmpList++) {
- if (strncmp( *tmpList, header.name, strlen(*tmpList))==0 || (
- header.name[strlen(header.name)-1]=='/'
- && strncmp( *tmpList, header.name,
- MIN(strlen(header.name)-1, strlen(*tmpList)))==0)) {
- /* If it is a regular file, pretend to extract it with
- * the extractFlag set to FALSE, so the junk in the tarball
- * is properly skipped over */
- skipFlag = FALSE;
- break;
- }
- }
+
+ if (!extract_file(extractList, header.name)) {
/* There are not the droids you're looking for, move along */
- if (skipFlag == TRUE) {
- if ( header.type==REGTYPE || header.type==REGTYPE0 )
- tarExtractRegularFile(&header, FALSE, FALSE);
- continue;
+ /* If it is a regular file, pretend to extract it with
+ * the extractFlag set to FALSE, so the junk in the tarball
+ * is properly skipped over */
+ if ( header.type==REGTYPE || header.type==REGTYPE0 ) {
+ if (tarExtractRegularFile(&header, FALSE, FALSE) == FALSE)
+ errorFlag = TRUE;
}
+ continue;
}
if (listFlag == TRUE) {
char buf[35];
struct tm *tm = localtime (&(header.mtime));
- len=printf("%s ", modeString(header.mode));
- memset(buf, 0, 8*sizeof(char));
+ len=printf("%s ", mode_string(header.mode));
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);
if (tarExtractSpecial( &header, extractFlag, tostdoutFlag)==FALSE)
errorFlag=TRUE;
break;
+#if 0
+ /* Handled earlier */
+ case GNULONGNAME:
+ case GNULONGLINK:
+ skipNextHeaderFlag=TRUE;
+ break;
+#endif
default:
+ error_msg("Unknown file type '%c' in tar file", header.type);
close( tarFd);
return( FALSE);
}
close(tarFd);
if (status > 0) {
/* Bummer - we read a partial header */
- errorMsg( "Error reading '%s': %s\n", tarName, strerror(errno));
+ perror_msg("Error reading tar file");
return ( FALSE);
}
else if (errorFlag==TRUE) {
- errorMsg( "Error exit delayed from previous errors\n");
+ error_msg( "Error exit delayed from previous errors");
return( FALSE);
} else
return( status);
close( tarFd);
if ( *(header.name) == '\0' ) {
if (errorFlag==TRUE)
- errorMsg( "Error exit delayed from previous errors\n");
+ error_msg( "Error exit delayed from previous errors");
else
return( TRUE);
}
#ifdef BB_FEATURE_TAR_CREATE
+/*
+** writeTarFile(), writeFileToTarball(), and writeTarHeader() are
+** the only functions that deal with the HardLinkInfo structure.
+** Even these functions use the xxxHardLinkInfo() functions.
+*/
+typedef struct HardLinkInfo HardLinkInfo;
+struct HardLinkInfo
+{
+ HardLinkInfo *next; /* Next entry in list */
+ dev_t dev; /* Device number */
+ ino_t ino; /* Inode number */
+ short linkCount; /* (Hard) Link Count */
+ char name[1]; /* Start of filename (must be last) */
+};
+
/* Some info to be carried along when creating a new tarball */
struct TarBallInfo
{
to include the tarball into itself */
int verboseFlag; /* Whether to print extra stuff or not */
char** excludeList; /* List of files to not include */
+ HardLinkInfo *hlInfoHead; /* Hard Link Tracking Information */
+ HardLinkInfo *hlInfo; /* Hard Link Info for the current file */
};
typedef struct TarBallInfo TarBallInfo;
+/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
+static void
+addHardLinkInfo (HardLinkInfo **hlInfoHeadPtr, dev_t dev, ino_t ino,
+ short linkCount, const char *name)
+{
+ /* Note: hlInfoHeadPtr can never be NULL! */
+ HardLinkInfo *hlInfo;
+
+ hlInfo = (HardLinkInfo *)xmalloc(sizeof(HardLinkInfo)+strlen(name)+1);
+ if (hlInfo) {
+ hlInfo->next = *hlInfoHeadPtr;
+ *hlInfoHeadPtr = hlInfo;
+ hlInfo->dev = dev;
+ hlInfo->ino = ino;
+ hlInfo->linkCount = linkCount;
+ strcpy(hlInfo->name, name);
+ }
+ return;
+}
+
+static void
+freeHardLinkInfo (HardLinkInfo **hlInfoHeadPtr)
+{
+ HardLinkInfo *hlInfo = NULL;
+ HardLinkInfo *hlInfoNext = NULL;
+
+ if (hlInfoHeadPtr) {
+ hlInfo = *hlInfoHeadPtr;
+ while (hlInfo) {
+ hlInfoNext = hlInfo->next;
+ free(hlInfo);
+ hlInfo = hlInfoNext;
+ }
+ *hlInfoHeadPtr = NULL;
+ }
+ return;
+}
+
+/* Might be faster (and bigger) if the dev/ino were stored in numeric order;) */
+static HardLinkInfo *
+findHardLinkInfo (HardLinkInfo *hlInfo, dev_t dev, ino_t ino)
+{
+ while(hlInfo) {
+ if ((ino == hlInfo->ino) && (dev == hlInfo->dev))
+ break;
+ hlInfo = hlInfo->next;
+ }
+ return(hlInfo);
+}
+
/* Put an octal string into the specified buffer.
* The number is zero and space padded and possibly null padded.
* Returns TRUE if successful. */
/* Write out a tar header for the specified file/directory/whatever */
static int
-writeTarHeader(struct TarBallInfo *tbInfo, const char *fileName, struct stat *statbuf)
+writeTarHeader(struct TarBallInfo *tbInfo, const char *header_name,
+ const char *real_name, struct stat *statbuf)
{
long chksum=0;
struct TarHeader header;
-#if defined BB_FEATURE_TAR_EXCLUDE
- char** tmpList;
-#endif
const unsigned char *cp = (const unsigned char *) &header;
ssize_t size = sizeof(struct TarHeader);
memset( &header, 0, size);
- if (*fileName=='/') {
- static int alreadyWarned=FALSE;
- if (alreadyWarned==FALSE) {
- errorMsg("Removing leading '/' from member names\n");
- alreadyWarned=TRUE;
- }
- strncpy(header.name, fileName+1, sizeof(header.name));
- }
- else {
- strncpy(header.name, fileName, sizeof(header.name));
- }
-
-#if defined BB_FEATURE_TAR_EXCLUDE
- /* Check for excluded files.... */
- for (tmpList=tbInfo->excludeList; tmpList && *tmpList; tmpList++) {
- /* Do some extra hoop jumping for when directory names
- * end in '/' but the entry in tmpList doesn't */
- if (strncmp( *tmpList, header.name, strlen(*tmpList))==0 || (
- header.name[strlen(header.name)-1]=='/'
- && strncmp( *tmpList, header.name,
- MIN(strlen(header.name)-1, strlen(*tmpList)))==0)) {
- /* Set the mode to something that is not a regular file, thereby
- * faking out writeTarFile into thinking that nothing further need
- * be done for this file. Yes, I know this is ugly, but it works. */
- statbuf->st_mode = 0;
- return( TRUE);
- }
- }
-#endif
+ strncpy(header.name, header_name, sizeof(header.name));
putOctal(header.mode, sizeof(header.mode), statbuf->st_mode);
putOctal(header.uid, sizeof(header.uid), statbuf->st_uid);
if (! *header.uname)
strcpy(header.uname, "root");
- /* WARNING/NOTICE: I break Hard Links */
- if (S_ISLNK(statbuf->st_mode)) {
+ if (tbInfo->hlInfo) {
+ /* This is a hard link */
+ header.typeflag = LNKTYPE;
+ strncpy(header.linkname, tbInfo->hlInfo->name, sizeof(header.linkname));
+ } else if (S_ISLNK(statbuf->st_mode)) {
int link_size=0;
char buffer[BUFSIZ];
header.typeflag = SYMTYPE;
- link_size = readlink(fileName, buffer, sizeof(buffer) - 1);
+ link_size = readlink(real_name, buffer, sizeof(buffer) - 1);
if ( link_size < 0) {
- errorMsg("Error reading symlink '%s': %s\n", header.name, strerror(errno));
+ perror_msg("Error reading symlink '%s'", header.name);
return ( FALSE);
}
buffer[link_size] = '\0';
header.typeflag = REGTYPE;
putOctal(header.size, sizeof(header.size), statbuf->st_size);
} else {
- errorMsg("%s: Unknown file type\n", fileName);
+ error_msg("%s: Unknown file type", real_name);
return ( FALSE);
}
putOctal(header.chksum, 7, chksum);
/* Now write the header out to disk */
- if ((size=fullWrite(tbInfo->tarFd, (char*)&header, sizeof(struct TarHeader))) < 0) {
- errorMsg(io_error, fileName, strerror(errno));
+ if ((size=full_write(tbInfo->tarFd, (char*)&header, sizeof(struct TarHeader))) < 0) {
+ error_msg(io_error, real_name, strerror(errno));
return ( FALSE);
}
/* Pad the header up to the tar block size */
static int writeFileToTarball(const char *fileName, struct stat *statbuf, void* userData)
{
struct TarBallInfo *tbInfo = (struct TarBallInfo *)userData;
+ const char *header_name;
+
+ /*
+ ** Check to see if we are dealing with a hard link.
+ ** If so -
+ ** Treat the first occurance of a given dev/inode as a file while
+ ** treating any additional occurances as hard links. This is done
+ ** by adding the file information to the HardLinkInfo linked list.
+ */
+ tbInfo->hlInfo = NULL;
+ if (statbuf->st_nlink > 1) {
+ tbInfo->hlInfo = findHardLinkInfo(tbInfo->hlInfoHead, statbuf->st_dev,
+ statbuf->st_ino);
+ if (tbInfo->hlInfo == NULL)
+ addHardLinkInfo (&tbInfo->hlInfoHead, statbuf->st_dev,
+ statbuf->st_ino, statbuf->st_nlink, fileName);
+ }
/* It is against the rules to archive a socket */
if (S_ISSOCK(statbuf->st_mode)) {
- errorMsg("%s: socket ignored\n", fileName);
+ error_msg("%s: socket ignored", fileName);
return( TRUE);
}
* the new tarball */
if (tbInfo->statBuf.st_dev == statbuf->st_dev &&
tbInfo->statBuf.st_ino == statbuf->st_ino) {
- errorMsg("%s: file is the archive; skipping\n", fileName);
+ error_msg("%s: file is the archive; skipping", fileName);
return( TRUE);
}
- if (writeTarHeader(tbInfo, fileName, statbuf)==FALSE) {
+ header_name = fileName;
+ while (header_name[0] == '/') {
+ static int alreadyWarned=FALSE;
+ if (alreadyWarned==FALSE) {
+ error_msg("Removing leading '/' from member names");
+ alreadyWarned=TRUE;
+ }
+ header_name++;
+ }
+
+ if (strlen(fileName) >= NAME_SIZE) {
+ error_msg(name_longer_than_foo, NAME_SIZE);
+ return ( TRUE);
+ }
+
+ if (header_name[0] == '\0')
+ return TRUE;
+
+#if defined BB_FEATURE_TAR_EXCLUDE
+ if (exclude_file(tbInfo->excludeList, header_name)) {
+ return SKIP;
+ }
+#endif
+
+ if (writeTarHeader(tbInfo, header_name, fileName, statbuf)==FALSE) {
return( FALSE);
}
/* Now, if the file is a regular file, copy it out to the tarball */
- if (S_ISREG(statbuf->st_mode)) {
+ if ((tbInfo->hlInfo == NULL)
+ && (S_ISREG(statbuf->st_mode))) {
int inputFileFd;
char buffer[BUFSIZ];
ssize_t size=0, readSize=0;
/* open the file we want to archive, and make sure all is well */
if ((inputFileFd = open(fileName, O_RDONLY)) < 0) {
- errorMsg("%s: Cannot open: %s\n", fileName, strerror(errno));
+ error_msg("%s: Cannot open: %s", fileName, strerror(errno));
return( FALSE);
}
/* write the file to the archive */
- while ( (size = fullRead(inputFileFd, buffer, sizeof(buffer))) > 0 ) {
- if (fullWrite(tbInfo->tarFd, buffer, size) != size ) {
+ while ( (size = full_read(inputFileFd, buffer, sizeof(buffer))) > 0 ) {
+ if (full_write(tbInfo->tarFd, buffer, size) != size ) {
/* Output file seems to have a problem */
- errorMsg(io_error, fileName, strerror(errno));
+ error_msg(io_error, fileName, strerror(errno));
return( FALSE);
}
readSize+=size;
}
if (size == -1) {
- errorMsg(io_error, fileName, strerror(errno));
+ error_msg(io_error, fileName, strerror(errno));
return( FALSE);
}
/* Pad the file up to the tar block size */
return( TRUE);
}
-static int writeTarFile(const char* tarName, int tostdoutFlag,
- int verboseFlag, int argc, char **argv, char** excludeList)
+static int writeTarFile(const char* tarName, int verboseFlag, char **argv,
+ char** excludeList)
{
int tarFd=-1;
int errorFlag=FALSE;
ssize_t size;
struct TarBallInfo tbInfo;
tbInfo.verboseFlag = verboseFlag;
+ tbInfo.hlInfoHead = NULL;
/* Make sure there is at least one file to tar up. */
- if (argc <= 0)
- fatalError("Cowardly refusing to create an empty archive\n");
+ if (*argv == NULL)
+ error_msg_and_die("Cowardly refusing to create an empty archive");
/* Open the tar file for writing. */
- if (tostdoutFlag == TRUE)
+ if (!strcmp(tarName, "-"))
tbInfo.tarFd = fileno(stdout);
else
tbInfo.tarFd = open (tarName, O_WRONLY | O_CREAT | O_TRUNC, 0644);
if (tbInfo.tarFd < 0) {
- errorMsg( "Error opening '%s': %s\n", tarName, strerror(errno));
+ perror_msg( "Error opening '%s'", tarName);
+ freeHardLinkInfo(&tbInfo.hlInfoHead);
return ( FALSE);
}
tbInfo.excludeList=excludeList;
/* Store the stat info for the tarball's file, so
* can avoid including the tarball into itself.... */
if (fstat(tbInfo.tarFd, &tbInfo.statBuf) < 0)
- fatalError(io_error, tarName, strerror(errno));
+ error_msg_and_die(io_error, tarName, strerror(errno));
/* Set the umask for this process so it doesn't
* screw up permission setting for us later. */
umask(0);
/* Read the directory/files and iterate over them one at a time */
- while (argc-- > 0) {
- if (recursiveAction(*argv++, TRUE, FALSE, FALSE,
+ while (*argv != NULL) {
+ if (recursive_action(*argv++, TRUE, FALSE, FALSE,
writeFileToTarball, writeFileToTarball,
(void*) &tbInfo) == FALSE) {
errorFlag = TRUE;
}
/* To be pedantically correct, we would check if the tarball
- * is smaller then 20 tar blocks, and pad it if it was smaller,
+ * is smaller than 20 tar blocks, and pad it if it was smaller,
* but that isn't necessary for GNU tar interoperability, and
* so is considered a waste of space */
/* Hang up the tools, close up shop, head home */
close(tarFd);
if (errorFlag == TRUE) {
- errorMsg("Error exit delayed from previous errors\n");
+ error_msg("Error exit delayed from previous errors");
+ freeHardLinkInfo(&tbInfo.hlInfoHead);
return(FALSE);
}
+ freeHardLinkInfo(&tbInfo.hlInfoHead);
return( TRUE);
}
projects / oweals / busybox.git / blobdiff