diff options
| -rw-r--r-- | archival/gunzip.c | 198 |
1 files changed, 99 insertions, 99 deletions
diff --git a/archival/gunzip.c b/archival/gunzip.c index e40982c..e47dd3f 100644 --- a/archival/gunzip.c +++ b/archival/gunzip.c @@ -66,18 +66,100 @@ 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; + 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 = (char *) xcalloc(sizeof(char), length + 1); + strncpy(out_path, 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 */ + delete_path = path; + if (flags & gunzip_verbose) { + fprintf(stderr, "OK\n"); + } + } else { + /* remove failed attempt */ + delete_path = out_path; + } + + fclose(out_file); + 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; +} + extern int gunzip_main(int argc, char **argv) { int flags = 0; - int opt = 0; - int delete_old_file, file_count; - struct stat stat_buf; - FILE *in_file, *out_file; - char *if_name, *of_name, *delete_file_name; - const int gunzip_to_stdout = 1; - const int gunzip_force = 2; - const int gunzip_test = 4; - const int gunzip_verbose = 8; + int i, opt; + int status = EXIT_SUCCESS; /* if called as zcat */ if (strcmp(applet_name, "zcat") == 0) @@ -108,95 +190,13 @@ extern int gunzip_main(int argc, char **argv) } } - file_count = argc - optind; - while (file_count==0 || optind < argc) { - in_file = stdin; - out_file = NULL; - if_name = NULL; - of_name = NULL; - delete_file_name = NULL; - delete_old_file = FALSE; - - /* Set input filename and number */ - if (argv[optind] == NULL || strcmp(argv[optind], "-") == 0) { - flags |= gunzip_to_stdout; - /* Skip to the end */ - optind = argc; - } else { - if_name = strdup(argv[optind]); - /* Open input file */ - in_file = xfopen(if_name, "r"); - - if (flags & gunzip_verbose) { - fprintf(stderr, "%s:\t", if_name); - } - - /* set the buffer size */ - setvbuf(in_file, NULL, _IOFBF, 0x8000); - - /* Get the time stamp on the input file. */ - if (stat(if_name, &stat_buf) < 0) { - error_msg_and_die("Couldn't stat file %s", if_name); - } - } + 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) + status = EXIT_FAILURE; - /* 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(if_name); - - delete_old_file = TRUE; - extension = strrchr(if_name, '.'); - if (extension && strcmp(extension, ".gz") == 0) { - length -= 3; - } else if (extension && strcmp(extension, ".tgz") == 0) { - length -= 4; - } else { - error_msg_and_die("Invalid extension"); - } - of_name = (char *) xcalloc(sizeof(char), length + 1); - strncpy(of_name, if_name, length); - - /* Open output file */ - out_file = xfopen(of_name, "w"); - - /* Set permissions on the file */ - chmod(of_name, stat_buf.st_mode); - } - - /* do the decompression, and cleanup */ - if (unzip(in_file, out_file) == 0) { - /* Success, remove .gz file */ - delete_file_name = if_name; - if (flags & gunzip_verbose) { - fprintf(stderr, "OK\n"); - } - } else { - /* remove failed attempt */ - delete_file_name = of_name; - } - - fclose(out_file); - fclose(in_file); - - if (delete_old_file == TRUE && !(flags & gunzip_test)) { - if (unlink(delete_file_name) < 0) { - error_msg_and_die("Couldnt remove %s", delete_file_name); - } - } - - free(of_name); - optind++; - } /* while () */ - - return(EXIT_SUCCESS); + return status; } - |