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authorGlenn L McGrath <bug1@ihug.co.nz>2002-11-27 07:52:22 +0000
committerGlenn L McGrath <bug1@ihug.co.nz>2002-11-27 07:52:22 +0000
commitec87d37305e2fef720503fce62f32ec837428780 (patch)
treeb39a3352e29b62cba2f471e9f33615145dbfc52f /archival
parent441e7efc72cdaf628d85b3c77d27df1008c43142 (diff)
downloadbusybox-ec87d37305e2fef720503fce62f32ec837428780.tar.gz
Check that one and only one of the [cxt] options is given
Diffstat (limited to 'archival')
-rw-r--r--archival/tar.c20
1 files changed, 14 insertions, 6 deletions
diff --git a/archival/tar.c b/archival/tar.c
index 379220291..1899ab954 100644
--- a/archival/tar.c
+++ b/archival/tar.c
@@ -597,6 +597,10 @@ static const llist_t *append_file_list_to_list(const char *filename, const llist
}
#endif
+#define CTX_CREATE 1
+#define CTX_TEST 2
+#define CTX_EXTRACT 4
+
int tar_main(int argc, char **argv)
{
char (*get_header_ptr)(archive_handle_t *) = get_header_tar;
@@ -604,10 +608,7 @@ int tar_main(int argc, char **argv)
int opt;
char *base_dir = NULL;
const char *tar_filename = "-";
-
-#ifdef CONFIG_FEATURE_TAR_CREATE
- unsigned char tar_create = FALSE;
-#endif
+ unsigned char ctx_flag = 0;
if (argc < 2) {
show_usage();
@@ -630,10 +631,11 @@ int tar_main(int argc, char **argv)
/* One and only one of these is required */
#ifdef CONFIG_FEATURE_TAR_CREATE
case 'c':
- tar_create = TRUE;
+ ctx_flag |= CTX_CREATE;
break;
#endif
case 't':
+ ctx_flag |= CTX_TEST;
if ((tar_handle->action_header == header_list) ||
(tar_handle->action_header == header_verbose_list)) {
tar_handle->action_header = header_verbose_list;
@@ -642,6 +644,7 @@ int tar_main(int argc, char **argv)
}
break;
case 'x':
+ ctx_flag |= CTX_EXTRACT;
tar_handle->action_data = data_extract_all;
break;
@@ -691,6 +694,11 @@ int tar_main(int argc, char **argv)
}
}
+ /* Check one and only one context option was given */
+ if ((ctx_flag != CTX_CREATE) && (ctx_flag != CTX_TEST) && (ctx_flag != CTX_EXTRACT)) {
+ show_usage();
+ }
+
/* Check if we are reading from stdin */
if ((argv[optind]) && (*argv[optind] == '-')) {
/* Default is to read from stdin, so just skip to next arg */
@@ -710,7 +718,7 @@ int tar_main(int argc, char **argv)
#ifdef CONFIG_FEATURE_TAR_CREATE
/* create an archive */
- if (tar_create == TRUE) {
+ if (ctx_flag == CTX_CREATE) {
int verboseFlag = FALSE;
int gzipFlag = FALSE;