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-rw-r--r--archival/tar.c174
1 files changed, 103 insertions, 71 deletions
diff --git a/archival/tar.c b/archival/tar.c
index 91baa2d..49d4d2e 100644
--- a/archival/tar.c
+++ b/archival/tar.c
@@ -55,24 +55,27 @@
#ifdef BB_FEATURE_TAR_CREATE
static const char tar_usage[] =
- "tar -[cxtvOf] [tarFileName] [FILE] ...\n\n"
+ "tar -[cxtvOf] [tarFile] [-X excludeFile] [FILE] ...\n\n"
"Create, extract, or list files from a tar file. Note that\n"
"this version of tar packs hard links as separate files.\n\n"
"Options:\n"
"\tc=create, x=extract, t=list contents, v=verbose,\n"
- "\tO=extract to stdout, f=tarfile or \"-\" for stdin\n";
+ "\tO=extract to stdout, f=tarfile or \"-\" for stdin\n"
+ "\tX=exclude file\n";
#else
static const char tar_usage[] =
- "tar -[xtvOf] [tarFileName] [FILE] ...\n\n"
+ "tar -[xtvO] [-f tarFile] [-X excludeFile] [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";
+ "\tO=extract to stdout, f=tarfile or \"-\" for stdin\n"
+ "\tX=exclude file\n";
+
#endif
@@ -157,90 +160,106 @@ static const unsigned long TarChecksumOffset = (const unsigned long)&(((TarHeade
/* Local procedures to restore files from a tar file. */
static int readTarFile(const char* tarName, int extractFlag, int listFlag,
- int tostdoutFlag, int verboseFlag);
+ int tostdoutFlag, int verboseFlag, 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);
-static int putOctal(char *cp, int len, long value);
-
+ int verboseFlag, int argc, char **argv, char** excludeList);
#endif
extern int tar_main(int argc, char **argv)
{
+ char** excludeList=NULL;
+ int excludeListSize=0;
const char *tarName=NULL;
- const char *options;
int listFlag = FALSE;
int extractFlag = FALSE;
int createFlag = FALSE;
int verboseFlag = FALSE;
int tostdoutFlag = FALSE;
+ int stopIt;
- argc--;
- argv++;
-
- if (argc < 1)
+ if (argc <= 1)
usage(tar_usage);
- /* Parse options */
- if (**argv == '-')
- options = (*argv++) + 1;
- else
- options = (*argv++);
- argc--;
-
- for (; *options; options++) {
- switch (*options) {
- case 'f':
- if (tarName != NULL)
- fatalError( "Only one 'f' option allowed\n");
-
- tarName = *argv++;
- if (tarName == NULL)
- fatalError( "Option requires an argument: No file specified\n");
- 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;
- tarName = "-";
- break;
-
- case '-':
- usage(tar_usage);
- break;
-
- default:
- fatalError( "Unknown tar flag '%c'\n"
- "Try `tar --help' for more information\n", *options);
+ /* Parse any options */
+ while (--argc > 0 && **(++argv) == '-') {
+ stopIt=FALSE;
+ while (stopIt==FALSE && *(++(*argv))) {
+ switch (**argv) {
+ case 'f':
+ if (--argc == 0) {
+ fatalError( "Option requires an argument: No file specified\n");
+ }
+ if (tarName != NULL)
+ fatalError( "Only one 'f' option allowed\n");
+ tarName = *(++argv);
+ if (tarName == NULL)
+ fatalError( "Option requires an argument: No file specified\n");
+ stopIt=TRUE;
+ 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;
+ tarName = "-";
+ break;
+ case 'X':
+ if (--argc == 0) {
+ fatalError( "Option requires an argument: No file specified\n");
+ }
+ excludeList=realloc( excludeList, sizeof(char**) * (excludeListSize+1));
+ excludeList[excludeListSize] = *(++argv);
+ /* Remove leading "/"s */
+ if (*excludeList[excludeListSize] =='/') {
+ excludeList[excludeListSize] = (excludeList[excludeListSize])+1;
+ }
+ if (excludeList[excludeListSize++] == NULL)
+ fatalError( "Option requires an argument: No file specified\n");
+ stopIt=TRUE;
+ break;
+
+ case '-':
+ usage(tar_usage);
+ break;
+
+ default:
+ fatalError( "Unknown tar flag '%c'\n"
+ "Try `tar --help' for more information\n", **argv);
+ }
}
}
+#if 0
+ for (i=0; i<excludeListSize; i++) {
+ printf( "%s\n", excludeList[i]);
+ fflush(stdout);
+ }
+#endif
+
/*
* Do the correct type of action supplying the rest of the
@@ -250,10 +269,10 @@ extern int tar_main(int argc, char **argv)
#ifndef BB_FEATURE_TAR_CREATE
fatalError( "This version of tar was not compiled with tar creation support.\n");
#else
- exit(writeTarFile(tarName, tostdoutFlag, verboseFlag, argc, argv));
+ exit(writeTarFile(tarName, tostdoutFlag, verboseFlag, argc, argv, excludeList));
#endif
} else {
- exit(readTarFile(tarName, extractFlag, listFlag, tostdoutFlag, verboseFlag));
+ exit(readTarFile(tarName, extractFlag, listFlag, tostdoutFlag, verboseFlag, excludeList));
}
flagError:
@@ -486,7 +505,7 @@ readTarHeader(struct TarHeader *rawHeader, struct TarInfo *header)
* If the list is empty than all files are extracted or listed.
*/
static int readTarFile(const char* tarName, int extractFlag, int listFlag,
- int tostdoutFlag, int verboseFlag)
+ int tostdoutFlag, int verboseFlag, char** excludeList)
{
int status, tarFd=0;
int errorFlag=FALSE;
@@ -675,6 +694,7 @@ struct TarBallInfo
tarball lives, so we can avoid trying
to include the tarball into itself */
int verboseFlag; /* Whether to print extra stuff or not */
+ char** excludeList; /* List of files to not include */
};
typedef struct TarBallInfo TarBallInfo;
@@ -719,6 +739,7 @@ writeTarHeader(struct TarBallInfo *tbInfo, const char *fileName, struct stat *st
{
long chksum=0;
struct TarHeader header;
+ char** tmpList;
const unsigned char *cp = (const unsigned char *) &header;
ssize_t size = sizeof(struct TarHeader);
@@ -735,6 +756,17 @@ writeTarHeader(struct TarBallInfo *tbInfo, const char *fileName, struct stat *st
else {
strcpy(header.name, fileName);
}
+#if 0
+ /* Now that leading '/''s have been removed */
+ for (tmpList=tbInfo->excludeList; tmpList && *tmpList; tmpList++) {
+ printf( "comparing '%s' and '%s'", *tmpList, header.name);
+ if (strcmp( *tmpList, header.name)==0)
+ printf( ": match\n");
+ else
+ printf( "\n");
+ }
+#endif
+
putOctal(header.mode, sizeof(header.mode), statbuf->st_mode);
putOctal(header.uid, sizeof(header.uid), statbuf->st_uid);
putOctal(header.gid, sizeof(header.gid), statbuf->st_gid);
@@ -868,12 +900,11 @@ static int writeFileToTarball(const char *fileName, struct stat *statbuf, void*
}
static int writeTarFile(const char* tarName, int tostdoutFlag,
- int verboseFlag, int argc, char **argv)
+ int verboseFlag, int argc, char **argv, char** excludeList)
{
int tarFd=-1;
int errorFlag=FALSE;
ssize_t size;
- //int skipFileFlag=FALSE;
struct TarBallInfo tbInfo;
tbInfo.verboseFlag = verboseFlag;
@@ -890,6 +921,7 @@ static int writeTarFile(const char* tarName, int tostdoutFlag,
errorMsg( "tar: Error opening '%s': %s\n", tarName, strerror(errno));
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)
generated by cgit v1.1 at 2024-12-27 11:36:06 +0000