Add dry run feature

3 files changed, 22 insertions, 3 deletions

diff --git a/src/nsgenbind.c b/src/nsgenbind.c
index 173f23d..9558b95 100644
--- a/src/nsgenbind.c
+++ b/src/nsgenbind.c
@@ -39,7 +39,7 @@ static struct options* process_cmdline(int argc, char **argv)
                 return NULL;
         }
 
-        while ((opt = getopt(argc, argv, "vgDW::I:")) != -1) {
+        while ((opt = getopt(argc, argv, "vngDW::I:")) != -1) {
                 switch (opt) {
                 case 'I':
                         options->idlpath = strdup(optarg);
@@ -49,6 +49,10 @@ static struct options* process_cmdline(int argc, char **argv)
                         options->verbose = true;
                         break;
 
+                case 'n':
+                        options->dryrun = true;
+                        break;
+
                 case 'D':
                         options->debug = true;
                         break;
diff --git a/src/options.h b/src/options.h
index 02674b7..5b7d73d 100644
--- a/src/options.h
+++ b/src/options.h
@@ -18,6 +18,8 @@ struct options {
 	bool verbose; /**< verbose processing */
 	bool debug; /**< debug enabled */
 	bool dbglog; /**< embed debug logging in output */
+        bool dryrun; /**< output is not generated */
+
 	unsigned int warnings; /**< warning flags */
 };
 
diff --git a/src/utils.c b/src/utils.c
index 0952744..85d26f2 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -48,7 +48,11 @@ FILE *genb_fopen(const char *fname, const char *mode)
         char *fpath;
         FILE *filef;
 
-        fpath = genb_fpath(fname);
+        if (options->dryrun) {
+                fpath = strdup("/dev/null");
+        } else {
+                fpath = genb_fpath(fname);
+        }
 
         filef = fopen(fpath, mode);
         if (filef == NULL) {
@@ -68,7 +72,11 @@ FILE *genb_fopen_tmp(const char *fname)
         char *fpath;
         FILE *filef;
 
-        fpath = genb_fpath_tmp(fname);
+        if (options->dryrun) {
+                fpath = strdup("/dev/null");
+        } else {
+                fpath = genb_fpath_tmp(fname);
+        }
 
         filef = fopen(fpath, "w+");
         if (filef == NULL) {
@@ -92,6 +100,11 @@ int genb_fclose_tmp(FILE *filef_tmp, const char *fname)
         size_t trd;
         size_t frd;
 
+        if (options->dryrun) {
+                fclose(filef_tmp);
+                return 0;
+        }
+
         fpath = genb_fpath(fname);
         tpath = genb_fpath_tmp(fname);