From 0e766183ee0d9108c4f803a5e66372fc9c2c119d Mon Sep 17 00:00:00 2001 From: Glenn L McGrath Date: Sat, 13 Oct 2001 05:03:29 +0000 Subject: Superficial changes to make the exclude/include code easier to understand --- archival/tar.c | 56 ++++++++++++++++++++++++++++++++++---------------------- tar.c | 56 ++++++++++++++++++++++++++++++++++---------------------- 2 files changed, 68 insertions(+), 44 deletions(-) diff --git a/archival/tar.c b/archival/tar.c index ea0247e56..bb66d40cc 100644 --- a/archival/tar.c +++ b/archival/tar.c @@ -513,25 +513,30 @@ void append_file_to_list(char *filename, char ***name_list, int *num_of_entries) if (line_ptr) { *line_ptr = '\0'; } - *name_list = realloc(*name_list, sizeof(char *) * (*num_of_entries + 1)); + *name_list = realloc(*name_list, sizeof(char *) * (*num_of_entries + 2)); (*name_list)[*num_of_entries] = xstrdup(line); (*num_of_entries)++; free(line); } fclose(src_stream); + (*name_list)[*num_of_entries] = NULL; } #ifdef BB_FEATURE_TAR_EXCLUDE -char **merge_list(char **include_list, char **exclude_list) +/* + * Create a list of names that are in the include list AND NOT in the exclude lists + */ +char **list_and_not_list(char **include_list, char **exclude_list) { char **new_include_list = NULL; int new_include_count = 0; int include_count = 0; int exclude_count; - if (include_list == NULL) - return exclude_list; - + if (include_list == NULL) { + return(NULL); + } + while (include_list[include_count] != NULL) { int found = FALSE; exclude_count = 0; @@ -547,12 +552,12 @@ char **merge_list(char **include_list, char **exclude_list) new_include_list = realloc(new_include_list, sizeof(char *) * (include_count + 2)); new_include_list[new_include_count] = include_list[include_count]; new_include_count++; - new_include_list[new_include_count] = NULL; } else { free(include_list[include_count]); } include_count++; } + new_include_list[new_include_count] = NULL; return(new_include_list); } #endif @@ -572,12 +577,13 @@ int tar_main(int argc, char **argv) #ifdef BB_FEATURE_TAR_EXCLUDE char **exclude_list = NULL; - int exclude_count = 0; + int exclude_list_count = 0; #endif FILE *src_stream = NULL; FILE *uncompressed_stream = NULL; char **include_list = NULL; + char **the_real_list = NULL; char *src_filename = NULL; char *dst_prefix = NULL; char *file_list_name = NULL; @@ -585,7 +591,7 @@ int tar_main(int argc, char **argv) unsigned short untar_funct = 0; unsigned short untar_funct_required = 0; unsigned short extract_function = 0; - int include_count = 0; + int include_list_count = 0; int gunzip_pid; int gz_fd = 0; @@ -621,13 +627,13 @@ int tar_main(int argc, char **argv) /* Exclude or Include files listed in */ #ifdef BB_FEATURE_TAR_EXCLUDE case 'X': - append_file_to_list(optarg, &exclude_list, &exclude_count); - exclude_list[exclude_count] = NULL; + append_file_to_list(optarg, &exclude_list, &exclude_list_count); + exclude_list[exclude_list_count] = NULL; break; #endif case 'T': // by default a list is an include list - append_file_to_list(optarg, &include_list, &include_count); + append_file_to_list(optarg, &include_list, &include_list_count); break; case 'C': // Change to dir @@ -677,23 +683,29 @@ int tar_main(int argc, char **argv) /* Setup an array of filenames to work with */ while (optind < argc) { - include_list = realloc(include_list, sizeof(char *) * (include_count + 2)); - include_list[include_count] = xstrdup(argv[optind]); - include_count++; + include_list = realloc(include_list, sizeof(char *) * (include_list_count + 2)); + include_list[include_list_count] = xstrdup(argv[optind]); + include_list_count++; optind++; - include_list[include_count] = NULL; + include_list[include_list_count] = NULL; } + /* By default the include list is the list we act on */ + the_real_list = include_list; + #ifdef BB_FEATURE_TAR_EXCLUDE - /* Remove excluded files from the include list */ if (exclude_list != NULL) { - /* If both an exclude and include file list were present then - * it's an exclude from include list only, if not it's really an - * exclude list (and a poor choice of variable names) */ if (include_list == NULL) { + /* the_real_list is an exclude list */ extract_function |= extract_exclude_list; + the_real_list = exclude_list; + } else { + /* Both an exclude and include file list was present, + * its an exclude from include list only. + * Remove excluded files from the include list + */ + the_real_list = list_and_not_list(include_list, exclude_list); } - include_list = merge_list(include_list, exclude_list); } #endif @@ -717,7 +729,7 @@ int tar_main(int argc, char **argv) uncompressed_stream = src_stream; /* extract or list archive */ - unarchive(uncompressed_stream, stdout, &get_header_tar, extract_function, dst_prefix, include_list); + unarchive(uncompressed_stream, stdout, &get_header_tar, extract_function, dst_prefix, the_real_list); fclose(uncompressed_stream); } #ifdef BB_FEATURE_TAR_CREATE @@ -733,7 +745,7 @@ int tar_main(int argc, char **argv) if (extract_function & extract_verbose_list) { verboseFlag = TRUE; } - writeTarFile(src_filename, verboseFlag, &argv[argc - 1], include_list); + writeTarFile(src_filename, verboseFlag, &argv[argc - 1], the_real_list); } #endif // BB_FEATURE_TAR_CREATE diff --git a/tar.c b/tar.c index ea0247e56..bb66d40cc 100644 --- a/tar.c +++ b/tar.c @@ -513,25 +513,30 @@ void append_file_to_list(char *filename, char ***name_list, int *num_of_entries) if (line_ptr) { *line_ptr = '\0'; } - *name_list = realloc(*name_list, sizeof(char *) * (*num_of_entries + 1)); + *name_list = realloc(*name_list, sizeof(char *) * (*num_of_entries + 2)); (*name_list)[*num_of_entries] = xstrdup(line); (*num_of_entries)++; free(line); } fclose(src_stream); + (*name_list)[*num_of_entries] = NULL; } #ifdef BB_FEATURE_TAR_EXCLUDE -char **merge_list(char **include_list, char **exclude_list) +/* + * Create a list of names that are in the include list AND NOT in the exclude lists + */ +char **list_and_not_list(char **include_list, char **exclude_list) { char **new_include_list = NULL; int new_include_count = 0; int include_count = 0; int exclude_count; - if (include_list == NULL) - return exclude_list; - + if (include_list == NULL) { + return(NULL); + } + while (include_list[include_count] != NULL) { int found = FALSE; exclude_count = 0; @@ -547,12 +552,12 @@ char **merge_list(char **include_list, char **exclude_list) new_include_list = realloc(new_include_list, sizeof(char *) * (include_count + 2)); new_include_list[new_include_count] = include_list[include_count]; new_include_count++; - new_include_list[new_include_count] = NULL; } else { free(include_list[include_count]); } include_count++; } + new_include_list[new_include_count] = NULL; return(new_include_list); } #endif @@ -572,12 +577,13 @@ int tar_main(int argc, char **argv) #ifdef BB_FEATURE_TAR_EXCLUDE char **exclude_list = NULL; - int exclude_count = 0; + int exclude_list_count = 0; #endif FILE *src_stream = NULL; FILE *uncompressed_stream = NULL; char **include_list = NULL; + char **the_real_list = NULL; char *src_filename = NULL; char *dst_prefix = NULL; char *file_list_name = NULL; @@ -585,7 +591,7 @@ int tar_main(int argc, char **argv) unsigned short untar_funct = 0; unsigned short untar_funct_required = 0; unsigned short extract_function = 0; - int include_count = 0; + int include_list_count = 0; int gunzip_pid; int gz_fd = 0; @@ -621,13 +627,13 @@ int tar_main(int argc, char **argv) /* Exclude or Include files listed in */ #ifdef BB_FEATURE_TAR_EXCLUDE case 'X': - append_file_to_list(optarg, &exclude_list, &exclude_count); - exclude_list[exclude_count] = NULL; + append_file_to_list(optarg, &exclude_list, &exclude_list_count); + exclude_list[exclude_list_count] = NULL; break; #endif case 'T': // by default a list is an include list - append_file_to_list(optarg, &include_list, &include_count); + append_file_to_list(optarg, &include_list, &include_list_count); break; case 'C': // Change to dir @@ -677,23 +683,29 @@ int tar_main(int argc, char **argv) /* Setup an array of filenames to work with */ while (optind < argc) { - include_list = realloc(include_list, sizeof(char *) * (include_count + 2)); - include_list[include_count] = xstrdup(argv[optind]); - include_count++; + include_list = realloc(include_list, sizeof(char *) * (include_list_count + 2)); + include_list[include_list_count] = xstrdup(argv[optind]); + include_list_count++; optind++; - include_list[include_count] = NULL; + include_list[include_list_count] = NULL; } + /* By default the include list is the list we act on */ + the_real_list = include_list; + #ifdef BB_FEATURE_TAR_EXCLUDE - /* Remove excluded files from the include list */ if (exclude_list != NULL) { - /* If both an exclude and include file list were present then - * it's an exclude from include list only, if not it's really an - * exclude list (and a poor choice of variable names) */ if (include_list == NULL) { + /* the_real_list is an exclude list */ extract_function |= extract_exclude_list; + the_real_list = exclude_list; + } else { + /* Both an exclude and include file list was present, + * its an exclude from include list only. + * Remove excluded files from the include list + */ + the_real_list = list_and_not_list(include_list, exclude_list); } - include_list = merge_list(include_list, exclude_list); } #endif @@ -717,7 +729,7 @@ int tar_main(int argc, char **argv) uncompressed_stream = src_stream; /* extract or list archive */ - unarchive(uncompressed_stream, stdout, &get_header_tar, extract_function, dst_prefix, include_list); + unarchive(uncompressed_stream, stdout, &get_header_tar, extract_function, dst_prefix, the_real_list); fclose(uncompressed_stream); } #ifdef BB_FEATURE_TAR_CREATE @@ -733,7 +745,7 @@ int tar_main(int argc, char **argv) if (extract_function & extract_verbose_list) { verboseFlag = TRUE; } - writeTarFile(src_filename, verboseFlag, &argv[argc - 1], include_list); + writeTarFile(src_filename, verboseFlag, &argv[argc - 1], the_real_list); } #endif // BB_FEATURE_TAR_CREATE -- cgit v1.2.3