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