Update: always ensure standard file descriptors are closed on program exit.

Explicitly close file descritpros on exit.
This is especially important now that the program could be a child process and the file descriptor could be open between a parent process.

diff --git a/level_3/byte_dump/c/main.c b/level_3/byte_dump/c/main.c
index 9a955d2..1714422 100644 (file)
--- a/level_3/byte_dump/c/main.c
+++ b/level_3/byte_dump/c/main.c
@@ -8,7 +8,14 @@ int main(const unsigned long argc, const f_string_t *argv) {
     data.process_pipe = F_true;
   }
 
-  if (F_status_is_error(byte_dump_main(arguments, &data))) {
+  const f_status_t status = byte_dump_main(arguments, &data);
+
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
+  if (F_status_is_error(status)) {
     return 1;
   }
 

diff --git a/level_3/control/c/control.h b/level_3/control/c/control.h
index 0be02a6..0311111 100644 (file)
--- a/level_3/control/c/control.h
+++ b/level_3/control/c/control.h
@@ -13,6 +13,7 @@
 #ifndef _control_h
 
 // libc includes
+#include <unistd.h>
 
 // fll-0 includes
 #include <level_0/type.h>

diff --git a/level_3/control/c/main.c b/level_3/control/c/main.c
index 2759341..b0da32a 100644 (file)
--- a/level_3/control/c/main.c
+++ b/level_3/control/c/main.c
@@ -8,7 +8,14 @@ int main(const unsigned long argc, const f_string_t *argv) {
     data.process_pipe = F_true;
   }
 
-  if (F_status_is_error(control_main(arguments, &data))) {
+  const f_status_t status = control_main(arguments, &data);
+
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
+  if (F_status_is_error(status)) {
     return 1;
   }
 

diff --git a/level_3/controller/c/main.c b/level_3/controller/c/main.c
index 653a1e4..d9cde60 100644 (file)
--- a/level_3/controller/c/main.c
+++ b/level_3/controller/c/main.c
@@ -10,7 +10,14 @@ int main(const unsigned long argc, const f_string_t *argv) {
 
   data.pid = getpid();
 
-  if (F_status_is_error(controller_main(arguments, &data))) {
+  const f_status_t status = controller_main(arguments, &data);
+
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
+  if (F_status_is_error(status)) {
     return 1;
   }
 

diff --git a/level_3/fake/c/main.c b/level_3/fake/c/main.c
index 5d612b0..bf9a47e 100644 (file)
--- a/level_3/fake/c/main.c
+++ b/level_3/fake/c/main.c
@@ -45,6 +45,11 @@ int main(const unsigned long argc, const f_string_t *argv) {
 
   f_signal_close(&data.signal);
 
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
   if (F_status_is_error(status)) {
     return 1;
   }

diff --git a/level_3/firewall/c/firewall.h b/level_3/firewall/c/firewall.h
index 40797fb..51b5a13 100644 (file)
--- a/level_3/firewall/c/firewall.h
+++ b/level_3/firewall/c/firewall.h
@@ -15,6 +15,7 @@
 #include <dirent.h>
 #include <stdio.h>
 #include <string.h>
+#include <unistd.h>
 
 // fll-0 includes
 #include <level_0/type.h>

diff --git a/level_3/fss_basic_list_read/c/fss_basic_list_read.h b/level_3/fss_basic_list_read/c/fss_basic_list_read.h
index 2925fa5..7ce5951 100644 (file)
--- a/level_3/fss_basic_list_read/c/fss_basic_list_read.h
+++ b/level_3/fss_basic_list_read/c/fss_basic_list_read.h
@@ -18,6 +18,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 // fll-0 includes
 #include <level_0/type.h>

diff --git a/level_3/fss_basic_list_read/c/main.c b/level_3/fss_basic_list_read/c/main.c
index 8bc7bb7..c7119c8 100644 (file)
--- a/level_3/fss_basic_list_read/c/main.c
+++ b/level_3/fss_basic_list_read/c/main.c
@@ -8,7 +8,14 @@ int main(const unsigned long argc, const f_string_t *argv) {
     data.process_pipe = F_true;
   }
 
-  if (F_status_is_error(fss_basic_list_read_main(arguments, &data))) {
+  const f_status_t status = fss_basic_list_read_main(arguments, &data);
+
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
+  if (F_status_is_error(status)) {
     return 1;
   }
 

diff --git a/level_3/fss_basic_list_write/c/fss_basic_list_write.h b/level_3/fss_basic_list_write/c/fss_basic_list_write.h
index c3cf3d2..091c452 100644 (file)
--- a/level_3/fss_basic_list_write/c/fss_basic_list_write.h
+++ b/level_3/fss_basic_list_write/c/fss_basic_list_write.h
@@ -13,6 +13,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 // fll-0 includes
 #include <level_0/type.h>

diff --git a/level_3/fss_basic_list_write/c/main.c b/level_3/fss_basic_list_write/c/main.c
index d7b0ee0..8821ae6 100644 (file)
--- a/level_3/fss_basic_list_write/c/main.c
+++ b/level_3/fss_basic_list_write/c/main.c
@@ -8,7 +8,14 @@ int main(const unsigned long argc, const f_string_t *argv) {
     data.process_pipe = F_true;
   }
 
-  if (F_status_is_error(fss_basic_list_write_main(arguments, &data))) {
+  const f_status_t status = fss_basic_list_write_main(arguments, &data);
+
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
+  if (F_status_is_error(status)) {
     return 1;
   }
 

diff --git a/level_3/fss_basic_read/c/fss_basic_read.h b/level_3/fss_basic_read/c/fss_basic_read.h
index 8613c14..c473b13 100644 (file)
--- a/level_3/fss_basic_read/c/fss_basic_read.h
+++ b/level_3/fss_basic_read/c/fss_basic_read.h
@@ -18,6 +18,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 // fll-0 includes
 #include <level_0/type.h>

diff --git a/level_3/fss_basic_read/c/main.c b/level_3/fss_basic_read/c/main.c
index 8c53a8c..525f9a8 100644 (file)
--- a/level_3/fss_basic_read/c/main.c
+++ b/level_3/fss_basic_read/c/main.c
@@ -8,7 +8,14 @@ int main(const unsigned long argc, const f_string_t *argv) {
     data.process_pipe = F_true;
   }
 
-  if (F_status_is_error(fss_basic_read_main(arguments, &data))) {
+  const f_status_t status = fss_basic_read_main(arguments, &data);
+
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
+  if (F_status_is_error(status)) {
     return 1;
   }
 

diff --git a/level_3/fss_basic_write/c/fss_basic_write.h b/level_3/fss_basic_write/c/fss_basic_write.h
index 137a743..086d6ff 100644 (file)
--- a/level_3/fss_basic_write/c/fss_basic_write.h
+++ b/level_3/fss_basic_write/c/fss_basic_write.h
@@ -13,6 +13,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 // fll-0 includes
 #include <level_0/type.h>

diff --git a/level_3/fss_basic_write/c/main.c b/level_3/fss_basic_write/c/main.c
index 8a52fc7..3e3b56b 100644 (file)
--- a/level_3/fss_basic_write/c/main.c
+++ b/level_3/fss_basic_write/c/main.c
@@ -8,7 +8,14 @@ int main(const unsigned long argc, const f_string_t *argv) {
     data.process_pipe = F_true;
   }
 
-  if (F_status_is_error(fss_basic_write_main(arguments, &data))) {
+  const f_status_t status = fss_basic_write_main(arguments, &data);
+
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
+  if (F_status_is_error(status)) {
     return 1;
   }
 

diff --git a/level_3/fss_embedded_list_read/c/fss_embedded_list_read.h b/level_3/fss_embedded_list_read/c/fss_embedded_list_read.h
index 255c83d..09a09da 100644 (file)
--- a/level_3/fss_embedded_list_read/c/fss_embedded_list_read.h
+++ b/level_3/fss_embedded_list_read/c/fss_embedded_list_read.h
@@ -18,6 +18,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 // fll-0 includes
 #include <level_0/type.h>

diff --git a/level_3/fss_embedded_list_read/c/main.c b/level_3/fss_embedded_list_read/c/main.c
index 904d21f..7cd347c 100644 (file)
--- a/level_3/fss_embedded_list_read/c/main.c
+++ b/level_3/fss_embedded_list_read/c/main.c
@@ -8,7 +8,14 @@ int main(const unsigned long argc, const f_string_t *argv) {
     data.process_pipe = F_true;
   }
 
-  if (F_status_is_error(fss_embedded_list_read_main(arguments, &data))) {
+  const f_status_t status = fss_embedded_list_read_main(arguments, &data);
+
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
+  if (F_status_is_error(status)) {
     return 1;
   }
 

diff --git a/level_3/fss_embedded_list_write/c/fss_embedded_list_write.h b/level_3/fss_embedded_list_write/c/fss_embedded_list_write.h
index c3df671..9e57388 100644 (file)
--- a/level_3/fss_embedded_list_write/c/fss_embedded_list_write.h
+++ b/level_3/fss_embedded_list_write/c/fss_embedded_list_write.h
@@ -13,6 +13,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 // fll-0 includes
 #include <level_0/type.h>

diff --git a/level_3/fss_embedded_list_write/c/main.c b/level_3/fss_embedded_list_write/c/main.c
index 7db7189..d194dfb 100644 (file)
--- a/level_3/fss_embedded_list_write/c/main.c
+++ b/level_3/fss_embedded_list_write/c/main.c
@@ -8,7 +8,14 @@ int main(const unsigned long argc, const f_string_t *argv) {
     data.process_pipe = F_true;
   }
 
-  if (F_status_is_error(fss_embedded_list_write_main(arguments, &data))) {
+  const f_status_t status = fss_embedded_list_write_main(arguments, &data);
+
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
+  if (F_status_is_error(status)) {
     return 1;
   }
 

diff --git a/level_3/fss_extended_list_read/c/fss_extended_list_read.h b/level_3/fss_extended_list_read/c/fss_extended_list_read.h
index 71a8771..62f9d89 100644 (file)
--- a/level_3/fss_extended_list_read/c/fss_extended_list_read.h
+++ b/level_3/fss_extended_list_read/c/fss_extended_list_read.h
@@ -18,6 +18,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 // fll-0 includes
 #include <level_0/type.h>

diff --git a/level_3/fss_extended_list_read/c/main.c b/level_3/fss_extended_list_read/c/main.c
index a53a249..c1d0383 100644 (file)
--- a/level_3/fss_extended_list_read/c/main.c
+++ b/level_3/fss_extended_list_read/c/main.c
@@ -8,7 +8,14 @@ int main(const unsigned long argc, const f_string_t *argv) {
     data.process_pipe = F_true;
   }
 
-  if (F_status_is_error(fss_extended_list_read_main(arguments, &data))) {
+  const f_status_t status = fss_extended_list_read_main(arguments, &data);
+
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
+  if (F_status_is_error(status)) {
     return 1;
   }
 

diff --git a/level_3/fss_extended_list_write/c/fss_extended_list_write.h b/level_3/fss_extended_list_write/c/fss_extended_list_write.h
index 791f225..fc4151b 100644 (file)
--- a/level_3/fss_extended_list_write/c/fss_extended_list_write.h
+++ b/level_3/fss_extended_list_write/c/fss_extended_list_write.h
@@ -13,6 +13,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 // fll-0 includes
 #include <level_0/type.h>

diff --git a/level_3/fss_extended_list_write/c/main.c b/level_3/fss_extended_list_write/c/main.c
index 2360d4d..d543498 100644 (file)
--- a/level_3/fss_extended_list_write/c/main.c
+++ b/level_3/fss_extended_list_write/c/main.c
@@ -8,7 +8,14 @@ int main(const unsigned long argc, const f_string_t *argv) {
     data.process_pipe = F_true;
   }
 
-  if (F_status_is_error(fss_extended_list_write_main(arguments, &data))) {
+  const f_status_t status = fss_extended_list_write_main(arguments, &data);
+
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
+  if (F_status_is_error(status)) {
     return 1;
   }
 

diff --git a/level_3/fss_extended_read/c/fss_extended_read.h b/level_3/fss_extended_read/c/fss_extended_read.h
index ab106be..6126350 100644 (file)
--- a/level_3/fss_extended_read/c/fss_extended_read.h
+++ b/level_3/fss_extended_read/c/fss_extended_read.h
@@ -18,6 +18,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 // fll-0 includes
 #include <level_0/type.h>

diff --git a/level_3/fss_extended_read/c/main.c b/level_3/fss_extended_read/c/main.c
index d1a3e10..d9c3ea9 100644 (file)
--- a/level_3/fss_extended_read/c/main.c
+++ b/level_3/fss_extended_read/c/main.c
@@ -8,7 +8,14 @@ int main(const unsigned long argc, const f_string_t *argv) {
     data.process_pipe = F_true;
   }
 
-  if (F_status_is_error(fss_extended_read_main(arguments, &data))) {
+  const f_status_t status = fss_extended_read_main(arguments, &data);
+
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
+  if (F_status_is_error(status)) {
     return 1;
   }
 

diff --git a/level_3/fss_extended_write/c/fss_extended_write.h b/level_3/fss_extended_write/c/fss_extended_write.h
index 2f674fc..9b94f5d 100644 (file)
--- a/level_3/fss_extended_write/c/fss_extended_write.h
+++ b/level_3/fss_extended_write/c/fss_extended_write.h
@@ -13,6 +13,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 // fll-0 includes
 #include <level_0/type.h>

diff --git a/level_3/fss_extended_write/c/main.c b/level_3/fss_extended_write/c/main.c
index 5f78046..4eee1d6 100644 (file)
--- a/level_3/fss_extended_write/c/main.c
+++ b/level_3/fss_extended_write/c/main.c
@@ -8,7 +8,14 @@ int main(const unsigned long argc, const f_string_t *argv) {
     data.process_pipe = F_true;
   }
 
-  if (F_status_is_error(fss_extended_write_main(arguments, &data))) {
+  const f_status_t status = fss_extended_write_main(arguments, &data);
+
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
+  if (F_status_is_error(status)) {
     return 1;
   }
 

diff --git a/level_3/fss_status_code/c/fss_status_code.h b/level_3/fss_status_code/c/fss_status_code.h
index c3dccd5..20af567 100644 (file)
--- a/level_3/fss_status_code/c/fss_status_code.h
+++ b/level_3/fss_status_code/c/fss_status_code.h
@@ -13,6 +13,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 // fll-0 includes
 #include <level_0/type.h>

diff --git a/level_3/fss_status_code/c/main.c b/level_3/fss_status_code/c/main.c
index 765f96f..a668c81 100644 (file)
--- a/level_3/fss_status_code/c/main.c
+++ b/level_3/fss_status_code/c/main.c
@@ -10,6 +10,11 @@ int main(const unsigned long argc, const f_string_t *argv) {
 
   const f_status_t status = fss_status_code_main(arguments, &data);
 
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
   if (F_status_is_error(status) || status == F_false) {
     return 1;
   }

diff --git a/level_3/iki_read/c/iki_read.h b/level_3/iki_read/c/iki_read.h
index bdde2b8..23c1a9e 100644 (file)
--- a/level_3/iki_read/c/iki_read.h
+++ b/level_3/iki_read/c/iki_read.h
@@ -19,6 +19,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 // fll-0 includes
 #include <level_0/type.h>

diff --git a/level_3/iki_read/c/main.c b/level_3/iki_read/c/main.c
index d0c4093..0a7f6b4 100644 (file)
--- a/level_3/iki_read/c/main.c
+++ b/level_3/iki_read/c/main.c
@@ -8,7 +8,14 @@ int main(const unsigned long argc, const f_string_t *argv) {
     data.process_pipe = F_true;
   }
 
-  if (F_status_is_error(iki_read_main(arguments, &data))) {
+  const f_status_t status = iki_read_main(arguments, &data);
+
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
+  if (F_status_is_error(status)) {
     return 1;
   }
 

diff --git a/level_3/iki_write/c/iki_write.h b/level_3/iki_write/c/iki_write.h
index 9d371fb..1bddce4 100644 (file)
--- a/level_3/iki_write/c/iki_write.h
+++ b/level_3/iki_write/c/iki_write.h
@@ -19,6 +19,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 // fll-0 includes
 #include <level_0/type.h>

diff --git a/level_3/iki_write/c/main.c b/level_3/iki_write/c/main.c
index f86f945..08a68b7 100644 (file)
--- a/level_3/iki_write/c/main.c
+++ b/level_3/iki_write/c/main.c
@@ -8,7 +8,14 @@ int main(const unsigned long argc, const f_string_t *argv) {
     data.process_pipe = F_true;
   }
 
-  if (F_status_is_error(iki_write_main(arguments, &data))) {
+  const f_status_t status = iki_write_main(arguments, &data);
+
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
+  if (F_status_is_error(status)) {
     return 1;
   }
 

diff --git a/level_3/init/c/init.h b/level_3/init/c/init.h
index f28bf2d..84979cb 100644 (file)
--- a/level_3/init/c/init.h
+++ b/level_3/init/c/init.h
@@ -20,6 +20,7 @@
 
 // libc includes
 #include <sys/mount.h>
+#include <unistd.h>
 
 // fll-0 includes
 #include <level_0/type.h>

diff --git a/level_3/init/c/main.c b/level_3/init/c/main.c
index e6fe030..cd1282b 100644 (file)
--- a/level_3/init/c/main.c
+++ b/level_3/init/c/main.c
@@ -3,7 +3,6 @@
 int main(const unsigned long argc, const f_string_t *argv) {
   const f_console_arguments_t arguments = { argc, argv };
   init_data_t data = init_data_initialize;
-  f_status_t status = F_none;
 
   f_signal_set_empty(&data.signal.set);
   f_signal_set_add(F_signal_abort, &data.signal.set);
@@ -25,10 +24,15 @@ int main(const unsigned long argc, const f_string_t *argv) {
   // restore umask.
   umask(data.umask);
 
-  status = init_main(arguments, &data);
+  const f_status_t status = init_main(arguments, &data);
 
   f_signal_close(&data.signal);
 
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
   if (F_status_is_error(status)) {
     return 1;
   }

diff --git a/level_3/status_code/c/main.c b/level_3/status_code/c/main.c
index 19775d1..1126a88 100644 (file)
--- a/level_3/status_code/c/main.c
+++ b/level_3/status_code/c/main.c
@@ -10,6 +10,11 @@ int main(const unsigned long argc, const f_string_t *argv) {
 
   const f_status_t status = status_code_main(arguments, &data);
 
+  // close all open file descriptors.
+  close(f_type_descriptor_output);
+  close(f_type_descriptor_input);
+  close(f_type_descriptor_error);
+
   if (F_status_is_error(status) || status == F_false) {
     return 1;
   }

diff --git a/level_3/status_code/c/status_code.h b/level_3/status_code/c/status_code.h
index 7d14654..ab12225 100644 (file)
--- a/level_3/status_code/c/status_code.h
+++ b/level_3/status_code/c/status_code.h
@@ -13,6 +13,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 // fll-0 includes
 #include <level_0/type.h>