- spelling

[oweals/busybox.git] / procps / pidof.c

diff --git a/procps/pidof.c b/procps/pidof.c
index c75571a01508b895400eb1843bbfc5ba4d342b52..d9c8dca420a720c543b350be467e0f44f9163aa6 100644 (file)
--- a/procps/pidof.c
+++ b/procps/pidof.c
@@ -2,26 +2,12 @@
 /*
  * pidof implementation for busybox
  *
- * Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
- * Copyright (C) 1999-2002 by Erik Andersen <andersee@debian.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
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
  *
+ * Licensed under the GPL v2, see the file LICENSE in this tarball.
  */
 
-
+#include "busybox.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <errno.h>
@@ -29,51 +15,103 @@
 #include <signal.h>
 #include <ctype.h>
 #include <string.h>
+#include <sys/types.h>
 #include <unistd.h>
-#include "busybox.h"
 
+#if ENABLE_FEATURE_PIDOF_SINGLE
+#define _SINGLE_COMPL(a) a
+#define SINGLE (1<<0)
+#else
+#define _SINGLE_COMPL(a)
+#define SINGLE (0)
+#endif
 
-extern int pidof_main(int argc, char **argv)
+#if ENABLE_FEATURE_PIDOF_OMIT
+#define _OMIT_COMPL(a) a
+#define _OMIT(a) ,a
+#if ENABLE_FEATURE_PIDOF_SINGLE
+#define OMIT (1<<1)
+#else
+#define OMIT (1<<0)
+#endif
+#else
+#define _OMIT_COMPL(a) ""
+#define _OMIT(a)
+#define OMIT (0)
+#define omitted (0)
+#endif
+
+int pidof_main(int argc, char **argv)
 {
-       int opt, n = 0;
+       unsigned n = 0;
+       unsigned fail = 1;
+       unsigned long int opt;
+#if ENABLE_FEATURE_PIDOF_OMIT
+       llist_t *omits = NULL; /* list of pids to omit */
+       bb_opt_complementally = _OMIT_COMPL("o::");
+#endif
 
+       /* do unconditional option parsing */
+       opt = bb_getopt_ulflags(argc, argv,
+                                       _SINGLE_COMPL("s") _OMIT_COMPL("o:")
+                                       _OMIT(&omits));
 
-       /* do normal option parsing */
-       while ((opt = getopt(argc, argv, "ne:f:")) > 0) {
-               switch (opt) {
-#if 0
-                       case 'g':
-                               break;
-                       case 'e':
-                               break;
-#endif
-                       default:
-                               show_usage();
+#if ENABLE_FEATURE_PIDOF_OMIT
+       /* fill omit list.  */
+       {
+               char getppid_str[32];
+               llist_t * omits_p = omits;
+               while (omits_p) {
+                       /* are we asked to exclude the parent's process ID?  */
+                       if (!strncmp(omits_p->data, "%PPID", 5)) {
+                               llist_pop(&omits_p);
+                               snprintf(getppid_str, sizeof(getppid_str), "%d", getppid());
+                               llist_add_to(&omits_p, getppid_str);
+                       }
+                       omits_p = omits_p->link;
                }
        }
-
-       /* if we didn't get a process name, then we need to choke and die here */
-       if (argv[optind] == NULL)
-               show_usage();
-
-       /* Looks like everything is set to go. */
+#endif
+       /* Looks like everything is set to go.  */
        while(optind < argc) {
-               long* pidList;
+               long *pidList;
+               long *pl;
 
-               pidList = find_pid_by_name( argv[optind]);
-               if (!pidList || *pidList<=0) {
-                       break;
-               }
+               /* reverse the pidlist like GNU pidof does.  */
+               pidList = pidlist_reverse(find_pid_by_name(argv[optind]));
+               for(pl = pidList; *pl > 0; pl++) {
+#if ENABLE_FEATURE_PIDOF_OMIT
+                       unsigned omitted = 0;
+                       if (opt & OMIT) {
+                               llist_t *omits_p = omits;
+                               while (omits_p)
+                                       if (strtol(omits_p->data, NULL, 10) == *pl) {
+                                               omitted = 1; break;
+                                       } else
+                                               omits_p = omits_p->link;
+                       }
+#endif
+                       if (!omitted) {
+                               if (n) {
+                                       putchar(' ');
+                               } else {
+                                       n = 1;
+                               }
+                               printf("%ld", *pl);
+                       }
+                       fail = (!ENABLE_FEATURE_PIDOF_OMIT && omitted);
 
-               for(; pidList && *pidList!=0; pidList++) {
-                       printf("%s%ld", (n++ ? " " : ""), (long)*pidList);
+                       if (ENABLE_FEATURE_PIDOF_SINGLE && (opt & SINGLE))
+                               break;
                }
-               /* Note that we don't bother to free the memory
-                * allocated in find_pid_by_name().  It will be freed
-                * upon exit, so we can save a byte or two */
+               free(pidList);
                optind++;
        }
-       printf("\n");
+       putchar('\n');
 
-       return EXIT_SUCCESS;
+#if ENABLE_FEATURE_PIDOF_OMIT
+       if (ENABLE_FEATURE_CLEAN_UP)
+               llist_free(omits, NULL);
+#endif
+       return fail ? EXIT_FAILURE : EXIT_SUCCESS;
 }