- add a few basic tests for pidof(8)

[oweals/busybox.git] / libbb / find_pid_by_name.c

diff --git a/libbb/find_pid_by_name.c b/libbb/find_pid_by_name.c
index 570e7bd9353421f8e4b11ca3662fdd4ea9799932..966595ddb8470c4b123df5c1914017b7604de479 100644 (file)
--- a/libbb/find_pid_by_name.c
+++ b/libbb/find_pid_by_name.c
@@ -4,19 +4,7 @@
  *
  * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Licensed under the GPL v2, see the file LICENSE in this tarball.
  */
 
 #include <stdio.h>
@@ -25,10 +13,6 @@
 #include <stdlib.h>
 #include "libbb.h"
 
-#define COMM_LEN 16 /* synchronize with size of comm in struct task_struct
-                                          in /usr/include/linux/sched.h */
-
-
 /* find_pid_by_name()
  *
  *  Modified by Vladimir Oleynik for use with libbb/procps.c
@@ -37,6 +21,7 @@
  *  the proc filesystem.
  *
  *  Returns a list of all matching PIDs
+ *  It is the caller's duty to free the returned pidlist.
  */
 extern long* find_pid_by_name( const char* pidName)
 {
@@ -45,7 +30,7 @@ extern long* find_pid_by_name( const char* pidName)
        procps_status_t * p;
 
        pidList = xmalloc(sizeof(long));
-       while ((p = procps_scan(0)) != 0) 
+       while ((p = procps_scan(0)) != 0)
        {
                if (strncmp(p->short_cmd, pidName, COMM_LEN-1) == 0) {
                        pidList=xrealloc( pidList, sizeof(long) * (i+2));
@@ -57,6 +42,22 @@ extern long* find_pid_by_name( const char* pidName)
        return pidList;
 }
 
+extern long *pidlist_reverse(long *pidList)
+{
+       int i=0;
+       while (pidList[i] > 0 && i++);
+       if ( i-- > 0) {
+               long k;
+               int j;
+               for (j = 0; i > j; i--, j++) {
+                       k = pidList[i];
+                       pidList[i] = pidList[j];
+                       pidList[j] = k;
+               }
+       }
+       return pidList;
+}
+
 /* END CODE */
 /*
 Local Variables: