diff options
Diffstat (limited to 'archival/tar.c')
| -rw-r--r-- | archival/tar.c | 212 |
1 files changed, 124 insertions, 88 deletions
diff --git a/archival/tar.c b/archival/tar.c index a53370e..5c40786 100644 --- a/archival/tar.c +++ b/archival/tar.c @@ -42,13 +42,26 @@ #include <sys/sysmacros.h> +#ifdef BB_FEATURE_TAR_CREATE + static const char tar_usage[] = "tar -[cxtvOf] [tarFileName] [FILE] ...\n\n" -"Create, extract, or list files from a tar 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 -[cxtvOf] [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 /* @@ -95,7 +108,9 @@ typedef struct { */ static int listFlag; static int extractFlag; +#ifdef BB_FEATURE_TAR_CREATE static int createFlag; +#endif static int verboseFlag; static int tostdoutFlag; @@ -133,7 +148,10 @@ static long getOctal (const char *cp, int len); 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. */ @@ -145,15 +163,14 @@ static void saveRegularFile (const char *fileName, static void saveDirectory (const char *fileName, const struct stat *statbuf); -static int wantFileName (const char *fileName, - int fileCount, char **fileTable); - 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); +#endif + extern int tar_main (int argc, char **argv) { @@ -168,7 +185,9 @@ extern int tar_main (int argc, char **argv) errorFlag = FALSE; extractFlag = FALSE; +#ifdef BB_FEATURE_TAR_CREATE createFlag = FALSE; +#endif listFlag = FALSE; verboseFlag = FALSE; tostdoutFlag = FALSE; @@ -204,10 +223,16 @@ extern int tar_main (int argc, char **argv) case 'x': extractFlag = TRUE; break; - +#ifdef BB_FEATURE_TAR_CREATE case 'c': createFlag = TRUE; break; +#else + case 'c': + fprintf (stderr, "This version of tar was not compiled with tar creation support.\n" ); + + exit (FALSE); +#endif case 'v': verboseFlag = TRUE; @@ -234,7 +259,11 @@ extern int tar_main (int argc, char **argv) /* * Validate the options. */ - if (extractFlag + listFlag + createFlag != (TRUE+FALSE+FALSE)) { + if (extractFlag + listFlag +#ifdef BB_FEATURE_TAR_CREATE + + createFlag +#endif + != (TRUE+FALSE+FALSE)) { fprintf (stderr, "Exactly one of 'c', 'x' or 't' must be specified\n"); @@ -245,9 +274,11 @@ extern int tar_main (int argc, char **argv) * Do the correct type of action supplying the rest of the * command line arguments as the list of files to process. */ +#ifdef BB_FEATURE_TAR_CREATE if (createFlag==TRUE) writeTarFile (argc, argv); else +#endif readTarFile (argc, argv); if (errorFlag==TRUE) fprintf (stderr, "\n"); @@ -678,6 +709,92 @@ static void readData (const char *cp, int count) /* + * 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; + + 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; +} + +/* + * 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; +} + + + + +/* 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) @@ -741,7 +858,6 @@ static void writeTarFile (int fileCount, char **fileTable) perror (tarName); } - /* * Save one file into the tar file. * If the file is a directory, then this will recursively save all of @@ -1107,42 +1223,6 @@ static void writeTarBlock (const char *buf, int len) /* - * 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. @@ -1190,50 +1270,6 @@ static int putOctal (char *cp, int len, long value) 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; - - 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; -} - - +#endif /* END CODE */ |