procps/pmap.c

   1 /*
   2  * pmap implementation for busybox
   3  *
   4  * Copyright (C) 2010 Nokia Corporation. All rights reserved.
   5  * Written by Alexander Shishkin <virtuoso@slind.org>
   6  *
   7  * Licensed under GPLv2 or later, see the LICENSE file in this source tree
   8  * for details.
   9  */
  10
  11 //config:config PMAP
  12 //config:       bool "pmap"
  13 //config:       default y
  14 //config:       help
  15 //config:         Display processes' memory mappings.
  16
  17 //applet:IF_PMAP(APPLET(pmap, BB_DIR_USR_BIN, BB_SUID_DROP))
  18 //kbuild:lib-$(CONFIG_PMAP) += pmap.o
  19
  20 //usage:#define pmap_trivial_usage
  21 //usage:       "[-xq] PID"
  22 //usage:#define pmap_full_usage "\n\n"
  23 //usage:       "Display detailed process memory usage"
  24 //usage:     "\n"
  25 //usage:     "\n        -x      Show details"
  26 //usage:     "\n        -q      Quiet"
  27
  28 #include "libbb.h"
  29
  30 #if ULONG_MAX == 0xffffffff
  31 # define TABS "\t"
  32 # define AFMT "8"
  33 # define DASHES ""
  34 #else
  35 # define TABS "\t\t"
  36 # define AFMT "16"
  37 # define DASHES "--------"
  38 #endif
  39
  40 enum {
  41         OPT_x = 1 << 0,
  42         OPT_q = 1 << 1,
  43 };
  44
  45 static void print_smaprec(struct smaprec *currec, void *data)
  46 {
  47         unsigned opt = (uintptr_t)data;
  48
  49         printf("%0" AFMT "lx ", currec->smap_start);
  50
  51         if (opt & OPT_x)
  52                 printf("%7lu %7lu %7lu %7lu ",
  53                         currec->smap_size,
  54                         currec->smap_pss,
  55                         currec->private_dirty,
  56                         currec->smap_swap);
  57         else
  58                 printf("%7luK", currec->smap_size);
  59
  60         printf(" %.4s  %s\n", currec->smap_mode, currec->smap_name);
  61 }
  62
  63 static int procps_get_maps(pid_t pid, unsigned opt)
  64 {
  65         struct smaprec total;
  66         int ret;
  67         char buf[256];
  68
  69         read_cmdline(buf, sizeof(buf), pid, "no such process");
  70         printf("%u: %s\n", (int)pid, buf);
  71
  72         if (!(opt & OPT_q) && (opt & OPT_x))
  73                 puts("Address" TABS "  Kbytes     PSS   Dirty    Swap  Mode  Mapping");
  74
  75         memset(&total, 0, sizeof(total));
  76
  77         ret = procps_read_smaps(pid, &total, print_smaprec, (void*)(uintptr_t)opt);
  78         if (ret)
  79                 return ret;
  80
  81         if (!(opt & OPT_q)) {
  82                 if (opt & OPT_x)
  83                         printf("--------" DASHES "  ------  ------  ------  ------\n"
  84                                 "total" TABS " %7lu %7lu %7lu %7lu\n",
  85                                 total.smap_size, total.smap_pss, total.private_dirty, total.smap_swap);
  86                 else
  87                         printf("mapped: %luK\n", total.smap_size);
  88         }
  89
  90         return 0;
  91 }
  92
  93 int pmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  94 int pmap_main(int argc UNUSED_PARAM, char **argv)
  95 {
  96         unsigned opts;
  97         int ret;
  98
  99         opts = getopt32(argv, "xq");
 100         argv += optind;
 101
 102         ret = 0;
 103         while (*argv) {
 104                 pid_t pid = xatoi_positive(*argv++);
 105                 /* GNU pmap returns 42 if any of the pids failed */
 106                 if (procps_get_maps(pid, opts) != 0)
 107                         ret = 42;
 108         }
 109
 110         return ret;
 111 }