diff options
Diffstat (limited to 'src/sash/cmd_gzip.c')
| -rw-r--r-- | src/sash/cmd_gzip.c | 698 |
1 files changed, 0 insertions, 698 deletions
diff --git a/src/sash/cmd_gzip.c b/src/sash/cmd_gzip.c deleted file mode 100644 index 6bcec11..0000000 --- a/src/sash/cmd_gzip.c +++ /dev/null @@ -1,698 +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 "gzip" and "gunzip" built-in commands. - * These commands are optionally built into sash. - * This uses the zlib library by Jean-loup Gailly to compress and - * uncompress the files. - */ - -#if HAVE_GZIP - - -#include <sys/types.h> -#include <sys/stat.h> -#include <zlib.h> - -#include "sash.h" - - -#define GZ_EXT ".gz" -#define TGZ_EXT ".tgz" -#define Z_EXT ".Z" -#define TAR_EXT ".tar" -#define NO_EXT "" - - -/* - * Tables of conversions to make to file extensions. - */ -typedef struct -{ - const char * input; - const char * output; -} CONVERT; - - -static const CONVERT gzipConvertTable[] = -{ - {TAR_EXT, TGZ_EXT}, - {NO_EXT, GZ_EXT} -}; - - -static const CONVERT gunzipConvertTable[] = -{ - {TGZ_EXT, TAR_EXT}, - {GZ_EXT, NO_EXT}, - {Z_EXT, NO_EXT}, - {NO_EXT, NO_EXT} -}; - - -/* - * Local routines to compress and uncompress files. - */ -static BOOL gzip(const char * inputFile, const char * outputFile); -static BOOL gunzip(const char * inputFile, const char * outputFile); - -static const char * convertName - (const CONVERT * table, const char * inFile); - - -int -do_gzip(int argc, const char ** argv) -{ - const char * outPath; - const char * inFile; - const char * outFile; - int i; - int r; - - r = 0; - argc--; - argv++; - - /* - * Look for the -o option if it is present. - * If present, it must be at the end of the command. - * Remember the output path and remove it if found. - */ - outPath = NULL; - - if ((argc >= 2) && (strcmp(argv[argc - 2], "-o") == 0) && - (argv[argc - 1][0] != '-')) - { - argc -= 2; - outPath = argv[argc + 1]; - } - - /* - * Now make sure that there are no more options. - */ - for (i = 0; i < argc; i++) - { - if (argv[i][0] == '-') - { - if (strcmp(argv[i], "-o") == 0) - fprintf(stderr, "Illegal use of -o\n"); - else - fprintf(stderr, "Illegal option\n"); - - return 1; - } - } - - /* - * If there is no output path specified, then compress each of - * the input files in place using their full paths. The input - * file names are then deleted. - */ - if (outPath == NULL) - { - while (!intFlag && (argc-- > 0)) - { - inFile = *argv++; - - outFile = convertName(gzipConvertTable, inFile); - - /* - * Try to compress the file. - */ - if (!gzip(inFile, outFile)) - { - r = 1; - - continue; - } - - /* - * This was successful. - * Try to delete the original file now. - */ - if (unlink(inFile) < 0) - { - fprintf(stderr, "%s: %s\n", inFile, - "Compressed ok but unlink failed"); - - r = 1; - } - } - - return r; - } - - /* - * There is an output path specified. - * If it is not a directory, then either compress the single - * specified input file to the exactly specified output path, - * or else complain. - */ - if (!isDirectory(outPath)) - { - if (argc == 1) - r = !gzip(*argv, outPath); - else - { - fprintf(stderr, "Exactly one input file is required\n"); - r = 1; - } - - return r; - } - - /* - * There was an output directory specified. - * Compress each of the input files into the specified - * output directory, converting their extensions if possible. - */ - while (!intFlag && (argc-- > 0)) - { - inFile = *argv++; - - /* - * Strip the path off of the input file name to make - * the beginnings of the output file name. - */ - outFile = strrchr(inFile, '/'); - - if (outFile) - outFile++; - else - outFile = inFile; - - /* - * Convert the extension of the output file name if possible. - * If we can't, then that is ok. - */ - outFile = convertName(gzipConvertTable, outFile); - - /* - * Now build the output path name by prefixing it with - * the output directory. - */ - outFile = buildName(outPath, outFile); - - /* - * Compress the input file without deleting the input file. - */ - if (!gzip(inFile, outFile)) - r = 1; - } - - return r; -} - - -int -do_gunzip(int argc, const char ** argv) -{ - const char * outPath; - const char * inFile; - const char * outFile; - int i; - int r; - - r = 0; - argc--; - argv++; - - /* - * Look for the -o option if it is present. - * If present, it must be at the end of the command. - * Remember the output path and remove it if found. - */ - outPath = NULL; - - if ((argc >= 2) && (strcmp(argv[argc - 2], "-o") == 0) && - (argv[argc - 1][0] != '-')) - { - argc -= 2; - outPath = argv[argc + 1]; - } - - /* - * Now make sure that there are no more options. - */ - for (i = 0; i < argc; i++) - { - if (argv[i][0] == '-') - { - if (strcmp(argv[i], "-o") == 0) - fprintf(stderr, "Illegal use of -o\n"); - else - fprintf(stderr, "Illegal option\n"); - - return 1; - } - } - - /* - * If there is no output path specified, then uncompress each of - * the input files in place using their full paths. They must - * have one of the proper compression extensions which is converted. - * The input file names are then deleted. - */ - if (outPath == NULL) - { - while (!intFlag && (argc-- > 0)) - { - inFile = *argv++; - - outFile = convertName(gunzipConvertTable, inFile); - - if (inFile == outFile) - { - fprintf(stderr, "%s: %s\n", inFile, - "missing compression extension"); - r = 1; - - continue; - } - - /* - * Try to uncompress the file. - */ - if (!gunzip(inFile, outFile)) - { - r = 1; - continue; - } - - /* - * This was successful. - * Try to delete the original file now. - */ - if (unlink(inFile) < 0) - { - fprintf(stderr, "%s: %s\n", inFile, - "Uncompressed ok but unlink failed"); - r = 1; - } - } - - return r; - } - - /* - * There is an output path specified. - * If the output path is a device file then uncompress each of - * the input files to the device file. - */ - if (isDevice(outPath)) - { - while (!intFlag && (argc-- > 0)) - { - if (!gunzip(*argv++, outPath)) - r = 1; - } - - return r; - } - - /* - * If the output path is not a directory then either uncompress the - * single specified input file to the exactly specified output path, - * or else complain. - */ - if (!isDirectory(outPath)) - { - if (argc == 1) - return !gunzip(*argv, outPath); - else - fprintf(stderr, "Exactly one input file is required\n"); - - return 1; - } - - /* - * There was an output directory specified. - * Uncompress each of the input files into the specified - * output directory, converting their extensions if possible. - */ - while (!intFlag && (argc-- > 0)) - { - inFile = *argv++; - - /* - * Strip the path off of the input file name to make - * the beginnings of the output file name. - */ - outFile = strrchr(inFile, '/'); - - if (outFile) - outFile++; - else - outFile = inFile; - - /* - * Convert the extension of the output file name if possible. - * If we can't, then that is ok. - */ - outFile = convertName(gunzipConvertTable, outFile); - - /* - * Now build the output path name by prefixing it with - * the output directory. - */ - outFile = buildName(outPath, outFile); - - /* - * Uncompress the input file without deleting the input file. - */ - if (!gunzip(inFile, outFile)) - r = 1; - } - - return r; -} - - -/* - * Compress the specified input file to produce the output file. - * Returns TRUE if successful. - */ -static BOOL -gzip(const char * inputFileName, const char * outputFileName) -{ - gzFile outGZ; - int inFD; - int len; - int err; - struct stat statBuf1; - struct stat statBuf2; - char buf[BUF_SIZE]; - - outGZ = NULL; - inFD = -1; - - /* - * See if the output file is the same as the input file. - * If so, complain about it. - */ - if (stat(inputFileName, &statBuf1) < 0) - { - perror(inputFileName); - - return FALSE; - } - - if (stat(outputFileName, &statBuf2) < 0) - { - statBuf2.st_ino = -1; - statBuf2.st_dev = -1; - } - - if ((statBuf1.st_dev == statBuf2.st_dev) && - (statBuf1.st_ino == statBuf2.st_ino)) - { - fprintf(stderr, - "Cannot compress file \"%s\" on top of itself\n", - inputFileName); - - return FALSE; - } - - /* - * Open the input file. - */ - inFD = open(inputFileName, O_RDONLY); - - if (inFD < 0) - { - perror(inputFileName); - - goto failed; - } - - /* - * Ask the zlib library to open the output file. - */ - outGZ = gzopen(outputFileName, "wb9"); - - if (outGZ == NULL) - { - fprintf(stderr, "%s: gzopen failed\n", outputFileName); - - goto failed; - } - - /* - * Read the uncompressed data from the input file and write - * the compressed data to the output file. - */ - while ((len = read(inFD, buf, sizeof(buf))) > 0) - { - if (gzwrite(outGZ, buf, len) != len) - { - fprintf(stderr, "%s: %s\n", inputFileName, - gzerror(outGZ, &err)); - - goto failed; - } - - if (intFlag) - goto failed; - } - - if (len < 0) - { - perror(inputFileName); - - goto failed; - } - - /* - * All done, close the files. - */ - if (close(inFD)) - { - perror(inputFileName); - - goto failed; - } - - inFD = -1; - - if (gzclose(outGZ) != Z_OK) - { - fprintf(stderr, "%s: gzclose failed\n", outputFileName); - - goto failed; - } - - outGZ = NULL; - - /* - * Success. - */ - return TRUE; - - -/* - * Here on an error, to clean up. - */ -failed: - if (inFD >= 0) - (void) close(inFD); - - if (outGZ != NULL) - (void) gzclose(outGZ); - - return FALSE; -} - - -/* - * Uncompress the input file to produce the output file. - * Returns TRUE if successful. - */ -static BOOL -gunzip(const char * inputFileName, const char * outputFileName) -{ - gzFile inGZ; - int outFD; - int len; - int err; - struct stat statBuf1; - struct stat statBuf2; - char buf[BUF_SIZE]; - - inGZ = NULL; - outFD = -1; - - /* - * See if the output file is the same as the input file. - * If so, complain about it. - */ - if (stat(inputFileName, &statBuf1) < 0) - { - perror(inputFileName); - - return FALSE; - } - - if (stat(outputFileName, &statBuf2) < 0) - { - statBuf2.st_ino = -1; - statBuf2.st_dev = -1; - } - - if ((statBuf1.st_dev == statBuf2.st_dev) && - (statBuf1.st_ino == statBuf2.st_ino)) - { - fprintf(stderr, - "Cannot uncompress file \"%s\" on top of itself\n", - inputFileName); - - return FALSE; - } - - /* - * Ask the zlib library to open the input file. - */ - inGZ = gzopen(inputFileName, "rb"); - - if (inGZ == NULL) - { - fprintf(stderr, "%s: gzopen failed\n", inputFileName); - - return FALSE; - } - - /* - * Create the output file. - */ - if (isDevice(outputFileName)) - outFD = open(outputFileName, O_WRONLY); - else - outFD = open(outputFileName, O_WRONLY|O_CREAT|O_TRUNC, 0666); - - if (outFD < 0) - { - perror(outputFileName); - - goto failed; - } - - /* - * Read the compressed data from the input file and write - * the uncompressed data extracted from it to the output file. - */ - while ((len = gzread(inGZ, buf, sizeof(buf))) > 0) - { - if (fullWrite(outFD, buf, len) < 0) - { - perror(outputFileName); - - goto failed; - } - - if (intFlag) - goto failed; - } - - if (len < 0) - { - fprintf(stderr, "%s: %s\n", inputFileName, - gzerror(inGZ, &err)); - - goto failed; - } - - /* - * All done, close the files. - */ - if (close(outFD)) - { - perror(outputFileName); - - goto failed; - } - - outFD = -1; - - if (gzclose(inGZ) != Z_OK) - { - fprintf(stderr, "%s: gzclose failed\n", inputFileName); - - goto failed; - } - - inGZ = NULL; - - /* - * Success. - */ - return TRUE; - - -/* - * Here on an error, to clean up. - */ -failed: - if (outFD >= 0) - (void) close(outFD); - - if (inGZ != NULL) - (void) gzclose(inGZ); - - return FALSE; -} - - -/* - * Convert an input file name to an output file name according to - * the specified convertion table. The returned name points into a - * static buffer which is overwritten on each call. The table must - * end in an entry which always specifies a successful conversion. - * If no conversion is done the original input file name pointer is - * returned. - */ -const char * -convertName(const CONVERT * table, const char * inputFile) -{ - int inputLength; - int testLength; - static char buf[PATH_LEN]; - - inputLength = strlen(inputFile); - - for (;;) - { - testLength = strlen(table->input); - - if ((inputLength >= testLength) && - (memcmp(table->input, - inputFile + inputLength - testLength, - testLength) == 0)) - { - break; - } - - table++; - } - - /* - * If no conversion was done, return the original pointer. - */ - if ((testLength == 0) && (table->output[0] == '\0')) - return inputFile; - - /* - * Build the new name and return it. - */ - memcpy(buf, inputFile, inputLength - testLength); - - memcpy(buf + inputLength - testLength, table->output, - strlen(table->output) + 1); - - return buf; -} - - -#endif - -/* END CODE */ |