DragonFlyBSD: Implement CWD column

dragonflybsd/DragonFlyBSDProcess.c

@@ -47,6 +47,7 @@ const ProcessFieldData Process_fields[LAST_PROCESSFIELD] = {
    [TGID] = { .name = "TGID", .title = "TGID", .description = "Thread group ID (i.e. process ID)", .flags = 0, .pidColumn = true, },
    [PROC_COMM] = { .name = "COMM", .title = "COMM            ", .description = "comm string of the process", .flags = 0, },
    [PROC_EXE] = { .name = "EXE", .title = "EXE             ", .description = "Basename of exe of the process", .flags = 0, },
+   [CWD] = { .name = "CWD", .title = "CWD                       ", .description = "The current working directory of the process", .flags = PROCESS_FLAG_CWD, },
    [JID] = { .name = "JID", .title = "JID", .description = "Jail prison ID", .flags = 0, .pidColumn = true, },
    [JAIL] = { .name = "JAIL", .title = "JAIL        ", .description = "Jail prison name", .flags = 0, },
 };

dragonflybsd/DragonFlyBSDProcessList.c

@@ -296,6 +296,26 @@ static void DragonFlyBSDProcessList_updateExe(const struct kinfo_proc* kproc, Pr
    Process_updateExe(proc, target);
 }
 
+static void DragonFlyBSDProcessList_updateCwd(const struct kinfo_proc* kproc, Process* proc) {
+   const int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_CWD, kproc->kp_pid };
+   char buffer[2048];
+   size_t size = sizeof(buffer);
+   if (sysctl(mib, 4, buffer, &size, NULL, 0) != 0) {
+      free(proc->procCwd);
+      proc->procCwd = NULL;
+      return;
+   }
+
+   /* Kernel threads return an empty buffer */
+   if (buffer[0] == '\0') {
+      free(proc->procCwd);
+      proc->procCwd = NULL;
+      return;
+   }
+
+   free_and_xStrdup(&proc->procCwd, buffer);
+}
+
 static void DragonFlyBSDProcessList_updateProcessName(kvm_t* kd, const struct kinfo_proc* kproc, Process* proc) {
    Process_updateComm(proc, kproc->kp_comm);
 
@@ -459,6 +479,10 @@ void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
          DragonFlyBSDProcessList_updateExe(kproc, proc);
          DragonFlyBSDProcessList_updateProcessName(dfpl->kd, kproc, proc);
 
+         if (settings->flags & PROCESS_FLAG_CWD) {
+            DragonFlyBSDProcessList_updateCwd(kproc, proc);
+         }
+
          ProcessList_add(super, proc);
 
          dfp->jname = DragonFlyBSDProcessList_readJailName(dfpl, kproc->kp_jailid);

dragonflybsd/ProcessField.h

@@ -12,7 +12,7 @@ in the source distribution for its full text.
    JID   = 100,                  \
    JAIL  = 101,                  \
                                  \
-   DUMMY_BUMP_FIELD = PROC_EXE,  \
+   DUMMY_BUMP_FIELD = CWD,       \
    // End of list