InitSystem: detect version

Author: CarterLi

src/detection/initsystem/initsystem.h

@@ -4,9 +4,10 @@
 
 typedef struct FFInitSystemResult
 {
-    uint32_t pid;
     FFstrbuf name;
     FFstrbuf exe;
+    FFstrbuf version;
+    uint32_t pid;
 } FFInitSystemResult;
 
 const char* ffDetectInitSystem(FFInitSystemResult* result);

src/detection/initsystem/initsystem_linux.c

@@ -10,5 +10,51 @@ const char* ffDetectInitSystem(FFInitSystemResult* result)
 
     ffProcessGetInfoLinux((int) result->pid, &result->name, &result->exe, &exeName, NULL);
 
+    if (ffStrbufEqualS(&result->name, "systemd"))
+    {
+        if (ffProcessAppendStdOut(&result->version, (char* const[]) {
+            "systemctl",
+            "--version",
+            NULL,
+        }) == NULL && result->version.length)
+        {
+            uint32_t iStart = ffStrbufFirstIndexC(&result->version, '(');
+            if (iStart < result->version.length)
+            {
+                uint32_t iEnd = ffStrbufNextIndexC(&result->version, iStart + 1, ')');
+                ffStrbufSubstrBefore(&result->version, iEnd);
+                ffStrbufSubstrAfter(&result->version, iStart);
+            }
+            else
+            {
+                iStart = ffStrbufFirstIndexC(&result->version, ' ');
+                if (iStart < result->version.length)
+                {
+                    uint32_t iEnd = ffStrbufNextIndexC(&result->version, iStart + 1, ' ');
+                    ffStrbufSubstrBefore(&result->version, iEnd);
+                    ffStrbufSubstrAfter(&result->version, iStart);
+                }
+            }
+        }
+    }
+    else if (ffStrbufEqualS(&result->name, "launchd"))
+    {
+        if (ffProcessAppendStdOut(&result->version, (char* const[]) {
+            "launchctl",
+            "version",
+            NULL,
+        }) == NULL && result->version.length)
+        {
+            uint32_t iStart = ffStrbufFirstIndexS(&result->version, "Version ");
+            if (iStart < result->version.length)
+            {
+                iStart += strlen("Version");
+                uint32_t iEnd = ffStrbufNextIndexC(&result->version, iStart + 1, ':');
+                ffStrbufSubstrBefore(&result->version, iEnd);
+                ffStrbufSubstrAfter(&result->version, iStart);
+            }
+        }
+    }
+
     return NULL;
 }

src/modules/initsystem/initsystem.c

@@ -4,14 +4,15 @@
 #include "modules/initsystem/initsystem.h"
 #include "util/stringUtils.h"
 
-#define FF_INITSYSTEM_NUM_FORMAT_ARGS 3
+#define FF_INITSYSTEM_NUM_FORMAT_ARGS 4
 #define FF_INITSYSTEM_DISPLAY_NAME "Init System"
 
 void ffPrintInitSystem(FFInitSystemOptions* options)
 {
     FFInitSystemResult result = {
-        .exe = ffStrbufCreate(),
         .name = ffStrbufCreate(),
+        .exe = ffStrbufCreate(),
+        .version = ffStrbufCreate(),
         .pid = 1,
     };
 
@@ -26,13 +27,18 @@ void ffPrintInitSystem(FFInitSystemOptions* options)
     if(options->moduleArgs.outputFormat.length == 0)
     {
         ffPrintLogoAndKey(FF_INITSYSTEM_DISPLAY_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT);
-        ffStrbufPutTo(&result.name, stdout);
+        ffStrbufWriteTo(&result.name, stdout);
+        if (result.version.length)
+            printf(" (%s)\n", result.version.chars);
+        else
+            putchar('\n');
     }
     else
     {
         FF_PRINT_FORMAT_CHECKED(FF_INITSYSTEM_DISPLAY_NAME, 0, &options->moduleArgs, FF_PRINT_TYPE_DEFAULT, FF_INITSYSTEM_NUM_FORMAT_ARGS, ((FFformatarg[]) {
             {FF_FORMAT_ARG_TYPE_STRBUF, &result.name, "name"},
             {FF_FORMAT_ARG_TYPE_STRBUF, &result.exe, "exe"},
+            {FF_FORMAT_ARG_TYPE_STRBUF, &result.version, "version"},
             {FF_FORMAT_ARG_TYPE_UINT, &result.pid, "pid"},
         }));
     }
@@ -80,8 +86,9 @@ void ffGenerateInitSystemJsonConfig(FFInitSystemOptions* options, yyjson_mut_doc
 void ffGenerateInitSystemJsonResult(FF_MAYBE_UNUSED FFInitSystemOptions* options, yyjson_mut_doc* doc, yyjson_mut_val* module)
 {
     FFInitSystemResult result = {
-        .exe = ffStrbufCreate(),
         .name = ffStrbufCreate(),
+        .exe = ffStrbufCreate(),
+        .version = ffStrbufCreate(),
         .pid = 1,
     };
 
@@ -96,6 +103,7 @@ void ffGenerateInitSystemJsonResult(FF_MAYBE_UNUSED FFInitSystemOptions* options
     yyjson_mut_val* obj = yyjson_mut_obj_add_obj(doc, module, "result");
     yyjson_mut_obj_add_strbuf(doc, obj, "name", &result.name);
     yyjson_mut_obj_add_strbuf(doc, obj, "exe", &result.exe);
+    yyjson_mut_obj_add_strbuf(doc, obj, "version", &result.version);
     yyjson_mut_obj_add_uint(doc, obj, "pid", result.pid);
 
 exit:
@@ -108,6 +116,7 @@ void ffPrintInitSystemHelpFormat(void)
     FF_PRINT_MODULE_FORMAT_HELP_CHECKED(FF_INITSYSTEM_DISPLAY_NAME, "{1}", FF_INITSYSTEM_NUM_FORMAT_ARGS, ((const char* []) {
         "init system name - name",
         "init system exe path - exe",
+        "init system version path - version",
         "init system pid - pid",
     }));
 }
@@ -117,7 +126,7 @@ void ffInitInitSystemOptions(FFInitSystemOptions* options)
     ffOptionInitModuleBaseInfo(
         &options->moduleInfo,
         FF_INITSYSTEM_MODULE_NAME,
-        "Print init system (pid 1) name",
+        "Print init system (pid 1) name and version",
         ffParseInitSystemCommandOptions,
         ffParseInitSystemJsonObject,
         ffPrintInitSystem,