diff options
Diffstat (limited to 'archival/gunzip.c')
| -rw-r--r-- | archival/gunzip.c | 201 |
1 files changed, 87 insertions, 114 deletions
diff --git a/archival/gunzip.c b/archival/gunzip.c index e379ccf..c471227 100644 --- a/archival/gunzip.c +++ b/archival/gunzip.c @@ -66,114 +66,22 @@ static char *license_msg[] = { #include <getopt.h> #include "busybox.h" -const int gunzip_to_stdout = 1; -const int gunzip_force = 2; -const int gunzip_test = 4; -const int gunzip_verbose = 8; - -static int gunzip_file(const char *path, int flags) -{ - FILE *in_file, *out_file; - struct stat stat_buf; - const char *delete_path = NULL; - char *out_path = NULL; - - if (path == NULL || strcmp(path, "-") == 0) { - in_file = stdin; - flags |= gunzip_to_stdout; - } else { - if ((in_file = wfopen(path, "r")) == NULL) { - return -1; - } - if (flags & gunzip_verbose) { - fprintf(stderr, "%s:\t", path); - } - - /* set the buffer size */ - setvbuf(in_file, NULL, _IOFBF, 0x8000); - - /* Get the time stamp on the input file. */ - if (stat(path, &stat_buf) < 0) { - error_msg_and_die("Couldn't stat file %s", path); - } - } - - /* Check that the input is sane. */ - if (isatty(fileno(in_file)) && (flags & gunzip_force) == 0) { - error_msg_and_die - ("compressed data not read from terminal. Use -f to force it."); - } - - /* Set output filename and number */ - if (flags & gunzip_test) { - out_file = xfopen("/dev/null", "w"); /* why does test use filenum 2 ? */ - } else if (flags & gunzip_to_stdout) { - out_file = stdout; - } else { - char *extension; - int length = strlen(path); - - extension = strrchr(path, '.'); - if (extension && strcmp(extension, ".gz") == 0) { - length -= 3; - } else if (extension && strcmp(extension, ".tgz") == 0) { - length -= 4; - } else { - error_msg_and_die("Invalid extension"); - } - out_path = xstrndup(path, length); - - /* Open output file */ - out_file = xfopen(out_path, "w"); - - /* Set permissions on the file */ - chmod(out_path, stat_buf.st_mode); - } - - /* do the decompression, and cleanup */ - if (unzip(in_file, out_file) == 0) { - /* Success, remove .gz file */ - if (!(flags & gunzip_to_stdout)) { - delete_path = path; - } - if (flags & gunzip_verbose) { - fprintf(stderr, "OK\n"); - } - } else { - /* remove failed attempt */ - delete_path = out_path; - } - - if (out_file != stdout) { - fclose(out_file); - } - if (in_file != stdin) { - fclose(in_file); - } - - if (delete_path && !(flags & gunzip_test)) { - if (unlink(delete_path) < 0) { - error_msg_and_die("Couldn't remove %s", delete_path); - } - } - - free(out_path); - - return 0; -} +const char gunzip_to_stdout = 1; +const char gunzip_force = 2; +const char gunzip_test = 4; extern int gunzip_main(int argc, char **argv) { - int flags = 0; - int i, opt; - int status = EXIT_SUCCESS; + char status = EXIT_SUCCESS; + char flags = 0; + int opt; /* if called as zcat */ if (strcmp(applet_name, "zcat") == 0) { flags |= gunzip_to_stdout; } - while ((opt = getopt(argc, argv, "ctfhdqv")) != -1) { + while ((opt = getopt(argc, argv, "ctfhd")) != -1) { switch (opt) { case 'c': flags |= gunzip_to_stdout; @@ -184,30 +92,95 @@ extern int gunzip_main(int argc, char **argv) case 't': flags |= gunzip_test; break; - case 'v': - flags |= gunzip_verbose; - break; case 'd': /* Used to convert gzip to gunzip. */ break; - case 'q': - error_msg("-q option not supported, ignored"); - break; - case 'h': default: show_usage(); /* exit's inside usage */ } } - if (optind == argc) { - if (gunzip_file(NULL, flags) < 0) { - status = EXIT_FAILURE; - } - } else { - for (i = optind; i < argc; i++) { - if (gunzip_file(argv[i], flags) < 0) { + do { + FILE *in_file, *out_file; + struct stat stat_buf; + const char *old_path = argv[optind]; + const char *delete_path = NULL; + char *new_path = NULL; + + optind++; + + if (old_path == NULL || strcmp(old_path, "-") == 0) { + in_file = stdin; + flags |= gunzip_to_stdout; + } else { + in_file = wfopen(old_path, "r"); + if (in_file == NULL) { status = EXIT_FAILURE; + break; + } + + /* Get the time stamp on the input file. */ + if (stat(old_path, &stat_buf) < 0) { + error_msg_and_die("Couldn't stat file %s", old_path); } } - } + + /* Check that the input is sane. */ + if (isatty(fileno(in_file)) && ((flags & gunzip_force) == 0)) { + error_msg_and_die + ("compressed data not read from terminal. Use -f to force it."); + } + + /* Set output filename and number */ + if (flags & gunzip_test) { + out_file = xfopen("/dev/null", "w"); /* why does test use filenum 2 ? */ + } else if (flags & gunzip_to_stdout) { + out_file = stdout; + } else { + char *extension; + + new_path = xstrdup(old_path); + + extension = strrchr(new_path, '.'); + if (extension && (strcmp(extension, ".gz") == 0)) { + *extension = '\0'; + } else if (extension && (strcmp(extension, ".tgz") == 0)) { + extension[2] = 'a'; + extension[3] = 'r'; + } else { + error_msg_and_die("Invalid extension"); + } + + /* Open output file */ + out_file = xfopen(new_path, "w"); + + /* Set permissions on the file */ + chmod(old_path, stat_buf.st_mode); + + /* If unzip succeeds remove the old file */ + delete_path = old_path; + } + + /* do the decompression, and cleanup */ + if ((unzip(in_file, out_file) != 0) && (new_path)) { + /* Unzip failed, remove new path instead of old path */ + delete_path = new_path; + } + + if (out_file != stdout) { + fclose(out_file); + } + if (in_file != stdin) { + fclose(in_file); + } + + /* delete_path will be NULL if in test mode or from stdin */ + if (delete_path && (unlink(delete_path) == -1)) { + error_msg_and_die("Couldn't remove %s", delete_path); + } + + free(new_path); + + } while (optind < argc); + return status; } |