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/*
* pmap implementation for busybox
*
* Copyright (C) 2010 Nokia Corporation. All rights reserved.
* Written by Alexander Shishkin <virtuoso@slind.org>
*
* Licensed under GPLv2 or later, see the LICENSE file in this source tree
* for details.
*/
//config:config PMAP
//config: bool "pmap (6 kb)"
//config: default y
//config: help
//config: Display processes' memory mappings.
//applet:IF_PMAP(APPLET(pmap, BB_DIR_USR_BIN, BB_SUID_DROP))
//kbuild:lib-$(CONFIG_PMAP) += pmap.o
//usage:#define pmap_trivial_usage
//usage: "[-xq] PID"
//usage:#define pmap_full_usage "\n\n"
//usage: "Display process memory usage"
//usage: "\n"
//usage: "\n -x Show details"
//usage: "\n -q Quiet"
#include "libbb.h"
#if ULONG_MAX == 0xffffffff
# define TABS "\t"
# define AFMT "8"
# define DASHES ""
#else
# define TABS "\t\t"
# define AFMT "16"
# define DASHES "--------"
#endif
enum {
OPT_x = 1 << 0,
OPT_q = 1 << 1,
};
static void print_smaprec(struct smaprec *currec, void *data)
{
unsigned opt = (uintptr_t)data;
printf("%0" AFMT "lx ", currec->smap_start);
if (opt & OPT_x)
printf("%7lu %7lu %7lu %7lu ",
currec->smap_size,
currec->smap_pss,
currec->private_dirty,
currec->smap_swap);
else
printf("%7luK", currec->smap_size);
printf(" %.4s %s\n", currec->smap_mode, currec->smap_name);
}
static int procps_get_maps(pid_t pid, unsigned opt)
{
struct smaprec total;
int ret;
char buf[256];
read_cmdline(buf, sizeof(buf), pid, NULL);
printf("%u: %s\n", (int)pid, buf);
if (!(opt & OPT_q) && (opt & OPT_x))
puts("Address" TABS " Kbytes PSS Dirty Swap Mode Mapping");
memset(&total, 0, sizeof(total));
ret = procps_read_smaps(pid, &total, print_smaprec, (void*)(uintptr_t)opt);
if (ret)
return ret;
if (!(opt & OPT_q)) {
if (opt & OPT_x)
printf("--------" DASHES " ------ ------ ------ ------\n"
"total" TABS " %7lu %7lu %7lu %7lu\n",
total.smap_size, total.smap_pss, total.private_dirty, total.smap_swap);
else
printf("mapped: %luK\n", total.smap_size);
}
return 0;
}
int pmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int pmap_main(int argc UNUSED_PARAM, char **argv)
{
unsigned opts;
int ret;
opts = getopt32(argv, "xq");
argv += optind;
ret = 0;
while (*argv) {
pid_t pid = xatoi_positive(*argv++);
/* GNU pmap returns 42 if any of the pids failed */
if (procps_get_maps(pid, opts) != 0)
ret = 42;
}
return ret;
}
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