LXR busybox/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//applet:IF_PMAP(APPLET(pmap, _BB_DIR_USR_BIN, _BB_SUID_DROP))
  12//kbuild:lib-$(CONFIG_PMAP)     += pmap.o
  13
  14//config:config PMAP
  15//config:       bool "pmap"
  16//config:       default y
  17//config:       help
  18//config:         Display processes' memory mappings.
  19
  20//usage:#define pmap_trivial_usage
  21//usage:       "[-x][-q] PID"
  22//usage:#define pmap_full_usage "\n\n"
  23//usage:       "Display detailed precesses' memory usage\n"
  24//usage:       "\nOptions:"
  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
  40enum {
  41        OPT_x = 1 << 0,
  42        OPT_q = 1 << 1,
  43};
  44
  45static 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
  63static 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
  93int pmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  94int 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}
 112