shared/exit-status: turn status level into a bitmask, add "test"

The "test" doesn't really test much automatically, but it is still useful
to look at the mappings.

1 files changed, 20 insertions, 11 deletions

diff --git a/src/shared/exit-status.h b/src/shared/exit-status.h
index 5637e6aa04..425f841523 100644
--- a/src/shared/exit-status.h
+++ b/src/shared/exit-status.h
@@ -7,8 +7,8 @@
 #include "macro.h"
 #include "set.h"
 
-/* This defines pretty names for the LSB 'start' verb exit codes. Note that they shouldn't be confused with the LSB
- * 'status' verb exit codes which are defined very differently. For details see:
+/* This defines pretty names for the LSB 'start' verb exit codes. Note that they shouldn't be confused with
+ * the LSB 'status' verb exit codes which are defined very differently. For details see:
  *
  * https://refspecs.linuxbase.org/LSB_5.0.0/LSB-Core-generic/LSB-Core-generic/iniscrptact.html
  */
@@ -25,8 +25,8 @@ enum {
 
         /* BSD's sysexits.h defines a couple EX_xyz exit codes in the range 64 … 78 */
 
-        /* The LSB suggests that error codes >= 200 are "reserved". We use them here under the assumption that they
-         * hence are unused by init scripts. */
+        /* The LSB suggests that error codes >= 200 are "reserved". We use them here under the assumption
+         * that they hence are unused by init scripts. */
         EXIT_CHDIR = 200,
         EXIT_NICE,
         EXIT_FDS,
@@ -74,19 +74,28 @@ enum {
         EXIT_EXCEPTION = 255,  /* Whenever we want to propagate an abnormal/signal exit, in line with bash */
 };
 
-typedef enum ExitStatusLevel {
-        EXIT_STATUS_MINIMAL,   /* only cover libc EXIT_STATUS/EXIT_FAILURE */
-        EXIT_STATUS_SYSTEMD,   /* cover libc and systemd's own exit codes */
-        EXIT_STATUS_LSB,       /* cover libc, systemd's own and LSB exit codes */
-        EXIT_STATUS_FULL,      /* cover libc, systemd's own, LSB and BSD (EX_xyz) exit codes */
-} ExitStatusLevel;
+typedef enum ExitStatusClass {
+        EXIT_STATUS_GLIBC   = 1 << 0,  /* libc EXIT_STATUS/EXIT_FAILURE */
+        EXIT_STATUS_SYSTEMD = 1 << 1,  /* systemd's own exit codes */
+        EXIT_STATUS_LSB     = 1 << 2,  /* LSB exit codes */
+        EXIT_STATUS_BSD     = 1 << 3,  /* BSD (EX_xyz) exit codes */
+        EXIT_STATUS_FULL    = EXIT_STATUS_GLIBC | EXIT_STATUS_SYSTEMD | EXIT_STATUS_LSB | EXIT_STATUS_BSD,
+} ExitStatusClass;
 
 typedef struct ExitStatusSet {
         Set *status;
         Set *signal;
 } ExitStatusSet;
 
-const char* exit_status_to_string(int status, ExitStatusLevel level) _const_;
+const char* exit_status_to_string(int code, ExitStatusClass class) _const_;
+const char* exit_status_class(int code) _const_;
+
+typedef struct ExitStatusMapping {
+        const char *name;
+        ExitStatusClass class;
+} ExitStatusMapping;
+
+extern const ExitStatusMapping exit_status_mappings[256];
 
 typedef enum ExitClean {
         EXIT_CLEAN_DAEMON,