renamed calculate to detect

src/modules/terminal.c

@@ -1,11 +1,89 @@
 #include "fastfetch.h"
 
+#include <string.h>
+#include <unistd.h>
+#include <pthread.h>
+
 #define FF_TERMINAL_MODULE_NAME "Terminal"
 #define FF_TERMINAL_NUM_FORMAT_ARGS 3
 
+static void getTerminalName(FFinstance* instance, const char* pid, FFTerminalResult* result)
+{
+    char statFile[234];
+    sprintf(statFile, "/proc/%s/stat", pid);
+
+    FILE* stat = fopen(statFile, "r");
+    if(stat == NULL)
+    {
+        ffStrbufSetF(&result->error, "fopen(\"%s\", \"r\") == NULL", statFile);
+        return;
+    }
+
+    char name[256];
+    char ppid[256];
+    if(fscanf(stat, "%*s (%[^)])%*s%s", name, ppid) != 2)
+    {
+        ffStrbufSetS(&result->error, "fscanf(stat, \"%*s (%[^)])%*s%s\", name, ppid) != 2");
+        return;
+    }
+
+    fclose(stat);
+
+    if (
+        strcasecmp(name, "bash")   == 0 ||
+        strcasecmp(name, "sh")     == 0 ||
+        strcasecmp(name, "zsh")    == 0 ||
+        strcasecmp(name, "ksh")    == 0 ||
+        strcasecmp(name, "fish")   == 0 ||
+        strcasecmp(name, "sudo")   == 0 ||
+        strcasecmp(name, "su")     == 0 ||
+        strcasecmp(name, "doas")   == 0 ||
+        strcasecmp(name, "strace") == 0 )
+    {
+        getTerminalName(instance, ppid, result);
+        return;
+    }
+
+    char cmdlineFile[234];
+    sprintf(cmdlineFile, "/proc/%s/cmdline", pid);
+
+    ffGetFileContent(cmdlineFile, &result->exeName);
+    ffStrbufSubstrBeforeFirstC(&result->exeName, '\0');
+    ffStrbufSubstrAfterLastC(&result->exeName, '/');
+
+    ffStrbufSetS(&result->processName, name);
+}
+
+const FFTerminalResult* ffDetectTerminal(FFinstance* instance)
+{
+    static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
+    static FFTerminalResult result;
+    static bool init = false;
+    pthread_mutex_lock(&mutex);
+    if(init)
+    {
+        pthread_mutex_unlock(&mutex);
+        return &result;
+    }
+    init = true;
+
+    ffStrbufInit(&result.exeName);
+    ffStrbufInit(&result.processName);
+    ffStrbufInit(&result.error);
+
+    char ppid[256];
+    sprintf(ppid, "%i", getppid());
+
+    getTerminalName(instance, ppid, &result);
+
+    pthread_mutex_unlock(&mutex);
+
+    return &result;
+}
+
 void ffPrintTerminal(FFinstance* instance)
 {
-    const FFTerminalResult* result = ffCalculateTerminal(instance);
+    const FFTerminalResult* result = ffDetectTerminal(instance);
 
     if(result->error.length > 0)
     {