procps/pmap.c
Sami Kerola d50884788d pmap: new usage & fix coding style
Coding style fixed and more readable help output.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
2011-12-20 17:17:01 +01:00

489 lines
12 KiB
C

/*
* Copyright 2002 by Albert Cahalan; all rights reserved.
* This file may be used subject to the terms and conditions of the
* GNU Library General Public License Version 2, or any later version
* at your option, as published by the Free Software Foundation.
* 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 Library General Public License for more details.
*/
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "proc/escape.h"
#include "proc/readproc.h"
#include "proc/version.h"
static void __attribute__ ((__noreturn__))
usage(FILE * out)
{
fprintf(out,
"\nUsage: %s [options] pid [pid ...]\n"
"\nOptions:\n", program_invocation_short_name);
fprintf(out,
" -x, --extended show details\n"
" -d, --device show the device format\n"
" -q, --quiet do not display header and footer\n"
" -A, --range=<low>[,<high>] limit results to the given range\n"
" -h, --help display this help text\n"
" -V, --version display version information and exit\n");
fprintf(out, "\nFor more information see pmap(1).\n");
exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
}
static unsigned KLONG range_low;
static unsigned KLONG range_high = ~0ull;
static int d_option;
static int q_option;
static int x_option;
static unsigned shm_minor = ~0u;
static void discover_shm_minor(void)
{
void *addr;
int shmid;
char mapbuf[256];
if (!freopen("/proc/self/maps", "r", stdin))
return;
/* create */
shmid = shmget(IPC_PRIVATE, 42, IPC_CREAT | 0666);
if (shmid == -1)
/* failed; oh well */
return;
/* attach */
addr = shmat(shmid, NULL, SHM_RDONLY);
if (addr == (void *)-1)
goto out_destroy;
while (fgets(mapbuf, sizeof mapbuf, stdin)) {
char flags[32];
/* to clean up unprintables */
char *tmp;
unsigned KLONG start, end;
unsigned long long file_offset, inode;
unsigned dev_major, dev_minor;
sscanf(mapbuf, "%" KLF "x-%" KLF "x %31s %Lx %x:%x %Lu", &start,
&end, flags, &file_offset, &dev_major, &dev_minor,
&inode);
tmp = strchr(mapbuf, '\n');
if (tmp)
*tmp = '\0';
tmp = mapbuf;
while (*tmp) {
if (!isprint(*tmp))
*tmp = '?';
tmp++;
}
if (start > (unsigned long)addr)
continue;
if (dev_major)
continue;
if (flags[3] != 's')
continue;
if (strstr(mapbuf, "/SYSV")) {
shm_minor = dev_minor;
break;
}
}
if (shmdt(addr))
perror("shmdt");
out_destroy:
if (shmctl(shmid, IPC_RMID, NULL))
perror("IPC_RMID");
return;
}
static const char *mapping_name(proc_t * p, unsigned KLONG addr,
unsigned KLONG len, const char *mapbuf,
unsigned showpath, unsigned dev_major,
unsigned dev_minor, unsigned long long inode)
{
const char *cp;
if (!dev_major && dev_minor == shm_minor && strstr(mapbuf, "/SYSV")) {
static char shmbuf[64];
snprintf(shmbuf, sizeof shmbuf, " [ shmid=0x%Lx ]", inode);
return shmbuf;
}
cp = strrchr(mapbuf, '/');
if (cp) {
if (showpath)
return strchr(mapbuf, '/');
return cp[1] ? cp + 1 : cp;
}
cp = strchr(mapbuf, '/');
if (cp) {
if (showpath)
return cp;
/* it WILL succeed */
return strrchr(cp, '/') + 1;
}
cp = " [ anon ]";
if ((p->start_stack >= addr) && (p->start_stack <= addr + len))
cp = " [ stack ]";
return cp;
}
static int one_proc(proc_t * p)
{
char buf[32];
char mapbuf[9600];
char cmdbuf[512];
FILE *fp;
unsigned long total_shared = 0ul;
unsigned long total_private_readonly = 0ul;
unsigned long total_private_writeable = 0ul;
char *cp2 = NULL;
unsigned long long rss = 0ull;
unsigned long long private_dirty = 0ull;
unsigned long long shared_dirty = 0ull;
unsigned long long total_rss = 0ull;
unsigned long long total_private_dirty = 0ull;
unsigned long long total_shared_dirty = 0ull;
/* Overkill, but who knows what is proper? The "w" prog uses
* the tty width to determine this.
*/
int maxcmd = 0xfffff;
sprintf(buf, "/proc/%u/maps", p->tgid);
if ((fp = fopen(buf, "r")) == NULL)
return 1;
if (x_option) {
sprintf(buf, "/proc/%u/smaps", p->tgid);
if ((fp = freopen(buf, "r", fp)) == NULL)
return 1;
}
escape_command(cmdbuf, p, sizeof cmdbuf, &maxcmd,
ESC_ARGS | ESC_BRACKETS);
printf("%u: %s\n", p->tgid, cmdbuf);
if (!q_option && (x_option | d_option)) {
if (x_option) {
if (sizeof(KLONG) == 4)
printf
("Address Kbytes RSS Dirty Mode Mapping\n");
else
printf
("Address Kbytes RSS Dirty Mode Mapping\n");
}
if (d_option) {
if (sizeof(KLONG) == 4)
printf
("Address Kbytes Mode Offset Device Mapping\n");
else
printf
("Address Kbytes Mode Offset Device Mapping\n");
}
}
while (fgets(mapbuf, sizeof mapbuf, fp)) {
char flags[32];
/* to clean up unprintables */
char *tmp;
unsigned KLONG start, end, diff = 0;
unsigned long long file_offset, inode;
unsigned dev_major, dev_minor;
unsigned long long smap_value;
char smap_key[20];
/* hex values are lower case or numeric, keys are upper */
if (mapbuf[0] >= 'A' && mapbuf[0] <= 'Z') {
/* Its a key */
if (sscanf
(mapbuf, "%20[^:]: %llu", smap_key,
&smap_value) == 2) {
if (strncmp("Rss", smap_key, 3) == 0) {
rss = smap_value;
total_rss += smap_value;
continue;
}
if (strncmp("Shared_Dirty", smap_key, 12) == 0) {
shared_dirty = smap_value;
total_shared_dirty += smap_value;
continue;
}
if (strncmp("Private_Dirty", smap_key, 13) == 0) {
private_dirty = smap_value;
total_private_dirty += smap_value;
continue;
}
if (strncmp("Swap", smap_key, 4) == 0) {
/*doesnt matter as long as last */
printf((sizeof(KLONG) == 8)
? "%016" KLF
"x %7lu %7llu %7llu %s %s\n" :
"%08lx %7lu %7llu %7llu %s %s\n",
start,
(unsigned long)(diff >> 10), rss,
(private_dirty + shared_dirty),
flags, cp2);
/* reset some counters */
rss = shared_dirty = private_dirty =
0ull;
continue;
}
/* Other keys */
continue;
}
}
sscanf(mapbuf, "%" KLF "x-%" KLF "x %31s %Lx %x:%x %Lu", &start,
&end, flags, &file_offset, &dev_major, &dev_minor,
&inode);
if (start > range_high)
break;
if (end < range_low)
continue;
tmp = strchr(mapbuf, '\n');
if (tmp)
*tmp = '\0';
tmp = mapbuf;
while (*tmp) {
if (!isprint(*tmp))
*tmp = '?';
tmp++;
}
diff = end - start;
if (flags[3] == 's')
total_shared += diff;
if (flags[3] == 'p') {
flags[3] = '-';
if (flags[1] == 'w')
total_private_writeable += diff;
else
total_private_readonly += diff;
}
/* format used by Solaris 9 and procps-3.2.0+ an 'R'
* if swap not reserved (MAP_NORESERVE, SysV ISM
* shared mem, etc.)
*/
flags[4] = '-';
flags[5] = '\0';
if (x_option) {
cp2 =
mapping_name(p, start, diff, mapbuf, 0, dev_major,
dev_minor, inode);
/* printed with the keys */
continue;
}
if (d_option) {
const char *cp =
mapping_name(p, start, diff, mapbuf, 0, dev_major,
dev_minor, inode);
printf((sizeof(KLONG) == 8)
? "%016" KLF "x %7lu %s %016Lx %03x:%05x %s\n"
: "%08lx %7lu %s %016Lx %03x:%05x %s\n",
start,
(unsigned long)(diff >> 10),
flags, file_offset, dev_major, dev_minor, cp);
}
if (!x_option && !d_option) {
const char *cp =
mapping_name(p, start, diff, mapbuf, 1, dev_major,
dev_minor, inode);
printf((sizeof(KLONG) == 8)
? "%016" KLF "x %6luK %s %s\n"
: "%08lx %6luK %s %s\n",
start, (unsigned long)(diff >> 10), flags, cp);
}
}
if (!q_option) {
if (x_option) {
if (sizeof(KLONG) == 8) {
printf
("---------------- ------ ------ ------\n");
printf("total kB %15ld %7llu %7llu\n",
(total_shared + total_private_writeable +
total_private_readonly) >> 10,
total_rss,
(total_shared_dirty +
total_private_dirty)
);
} else {
printf
("-------- ------- ------- ------- -------\n");
printf
("total kB %7ld - - -\n",
(total_shared + total_private_writeable +
total_private_readonly) >> 10);
}
}
if (d_option) {
printf
("mapped: %ldK writeable/private: %ldK shared: %ldK\n",
(total_shared + total_private_writeable +
total_private_readonly) >> 10,
total_private_writeable >> 10, total_shared >> 10);
}
if (!x_option && !d_option) {
if (sizeof(KLONG) == 8)
printf(" total %16ldK\n",
(total_shared + total_private_writeable +
total_private_readonly) >> 10);
else
printf(" total %8ldK\n",
(total_shared + total_private_writeable +
total_private_readonly) >> 10);
}
}
return 0;
}
int main(int argc, char **argv)
{
unsigned *pidlist;
unsigned count = 0;
PROCTAB *PT;
proc_t p;
int ret = 0, c;
static const struct option longopts[] = {
{"extended", no_argument, NULL, 'x'},
{"device", no_argument, NULL, 'd'},
{"quiet", no_argument, NULL, 'q'},
{"range", required_argument, NULL, 'A'},
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'V'},
{NULL, 0, NULL, 0}
};
x_option = d_option = q_option = 0;
while ((c = getopt_long(argc, argv, "xrdqA:hV", longopts, NULL)) != -1)
switch (c) {
case 'x':
x_option = 1;
break;
case 'r':
warnx("option -r is ignored as SunOS compatibility");
break;
case 'd':
d_option = 1;
break;
case 'q':
q_option = 1;
break;
case 'A':
{
/* FIXME: this should be a function. */
char *walk = optarg;
char *arg1;
char *arg2;
if (walk[1]) {
arg1 = walk + 1;
walk += strlen(walk) - 1;
} else {
arg1 = *++argv;
if (!arg1)
usage(stderr);
}
arg2 = strchr(arg1, ',');
if (arg2)
*arg2 = '\0';
arg2 = *arg2 ? arg2++ : arg1;
if (*arg1)
range_low = STRTOUKL(arg1, &arg1, 16);
if (*arg2)
range_high = STRTOUKL(arg2, &arg2, 16);
if (*arg1 || *arg2)
usage(stderr);
}
break;
case 'h':
usage(stdout);
case 'V':
display_version();
return EXIT_SUCCESS;
case 'a': /* Sun prints anon/swap reservations */
case 'F': /* Sun forces hostile ptrace-like grab */
case 'l': /* Sun shows unresolved dynamic names */
case 'L': /* Sun shows lgroup info */
case 's': /* Sun shows page sizes */
case 'S': /* Sun shows swap reservations */
default:
usage(stderr);
}
argc -= optind;
argv += optind;
if (argc < 1)
errx(EXIT_FAILURE, "argument missing");
if (d_option && x_option)
errx(EXIT_FAILURE, "options -d and -x can not coexist");
pidlist = malloc(sizeof(unsigned) * argc);
if (pidlist == NULL)
err(EXIT_FAILURE, "cannot allocate %zu bytes",
sizeof(unsigned) * argc);
while (*argv) {
char *walk = *argv++;
char *endp;
unsigned long pid;
if (!strncmp("/proc/", walk, 6)) {
walk += 6;
/* user allowed to do: pmap /proc/PID */
if (*walk < '0' || *walk > '9')
continue;
}
if (*walk < '0' || *walk > '9')
usage(stderr);
pid = strtoul(walk, &endp, 0);
if (pid < 1ul || pid > 0x7ffffffful || *endp)
usage(stderr);
pidlist[count++] = pid;
}
discover_shm_minor();
memset(&p, '\0', sizeof(p));
/* old libproc interface is zero-terminated */
pidlist[count] = 0;
PT = openproc(PROC_FILLSTAT | PROC_FILLARG | PROC_PID, pidlist);
while (readproc(PT, &p)) {
ret |= one_proc(&p);
count--;
}
closeproc(PT);
if (count)
/* didn't find all processes asked for */
ret |= 42;
return ret;
}