busybox/procps/pwdx.c
Denys Vlasenko 8dff01d06a libbb: introduce and use is_prefixed_with()
function                                             old     new   delta
is_prefixed_with                                       -      18     +18
complete_username                                     78      77      -1
man_main                                             737     735      -2
fsck_device                                          429     427      -2
unpack_ar_archive                                     80      76      -4
strip_unsafe_prefix                                  105     101      -4
singlemount                                         1054    1050      -4
rtc_adjtime_is_utc                                    90      86      -4
resolve_mount_spec                                    88      84      -4
parse_one_line                                      1029    1025      -4
parse_conf                                          1460    1456      -4
may_wakeup                                            83      79      -4
loadkmap_main                                        219     215      -4
get_irqs_from_stat                                   103      99      -4
get_header_cpio                                      913     909      -4
findfs_main                                           79      75      -4
fbsplash_main                                       1230    1226      -4
load_crontab                                         776     771      -5
expand_vars_to_list                                 1151    1146      -5
date_main                                            881     876      -5
skip_dev_pfx                                          30      24      -6
make_device                                         2199    2193      -6
complete_cmd_dir_file                                773     767      -6
run_applet_and_exit                                  715     708      -7
uudecode_main                                        321     313      -8
pwdx_main                                            197     189      -8
execute                                              568     560      -8
i2cdetect_main                                      1186    1176     -10
procps_scan                                         1242    1230     -12
procps_read_smaps                                   1017    1005     -12
process_module                                       746     734     -12
patch_main                                          1903    1891     -12
nfsmount                                            3572    3560     -12
stack_machine                                        126     112     -14
process_timer_stats                                  449     435     -14
match_fstype                                         111      97     -14
do_ipaddr                                           1344    1330     -14
open_list_and_close                                  359     343     -16
get_header_tar                                      1795    1779     -16
prepend_new_eth_table                                340     323     -17
fsck_main                                           1811    1794     -17
find_iface_state                                      56      38     -18
dnsd_main                                           1321    1303     -18
base_device                                          179     158     -21
find_keyword                                         104      82     -22
handle_incoming_and_exit                            2785    2762     -23
parse_and_put_prompt                                 774     746     -28
modinfo                                              347     317     -30
find_action                                          204     171     -33
update_passwd                                       1470    1436     -34
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/49 up/down: 18/-540)         Total: -522 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2015-03-12 17:48:34 +01:00

61 lines
1.4 KiB
C

/* vi: set sw=4 ts=4: */
/*
* pwdx implementation for busybox
*
* Copyright (c) 2004 Nicholas Miell
* ported from procps by Pere Orga <gotrunks@gmail.com> 2011
*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
//config:config PWDX
//config: bool "pwdx"
//config: default y
//config: help
//config: Report current working directory of a process
//applet:IF_PWDX(APPLET(pwdx, BB_DIR_USR_BIN, BB_SUID_DROP))
//kbuild:lib-$(CONFIG_PWDX) += pwdx.o
//usage:#define pwdx_trivial_usage
//usage: "PID..."
//usage:#define pwdx_full_usage "\n\n"
//usage: "Show current directory for PIDs"
#include "libbb.h"
int pwdx_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int pwdx_main(int argc UNUSED_PARAM, char **argv)
{
opt_complementary = "-1";
getopt32(argv, "");
argv += optind;
do {
char buf[sizeof("/proc/%u/cwd") + sizeof(int)*3];
unsigned pid;
char *s;
char *arg = *argv;
// Allowed on the command line:
// /proc/NUM
// NUM
if (is_prefixed_with(arg, "/proc/"))
arg += 6;
pid = bb_strtou(arg, NULL, 10);
if (errno)
bb_error_msg_and_die("invalid process id: '%s'", arg);
sprintf(buf, "/proc/%u/cwd", pid);
s = xmalloc_readlink(buf);
// "pwdx /proc/1" says "/proc/1: DIR", not "1: DIR"
printf("%s: %s\n", *argv, s ? s : strerror(errno == ENOENT ? ESRCH : errno));
free(s);
} while (*++argv);
return EXIT_SUCCESS;
}