mirror of
https://github.com/sheumann/hush.git
synced 2024-12-22 14:30:31 +00:00
237bedd499
In many cases, this aqllows to drop use of opt_complementary. Approximately -400 bytes: function old new delta getopt32 1423 1502 +79 opt_string 17 18 +1 OPT_STR 24 25 +1 uniq_main 416 406 -10 timeout_main 279 269 -10 sulogin_main 270 260 -10 readprofile_main 1825 1815 -10 ps_main 543 533 -10 pidof_main 245 235 -10 pgrep_main 611 601 -10 od_main 2600 2590 -10 mkfs_minix_main 2684 2674 -10 mkfs_ext2_main 2603 2593 -10 microcom_main 712 702 -10 makemime_main 315 305 -10 ionice_main 282 272 -10 inetd_main 2074 2064 -10 ifplugd_main 1144 1134 -10 halt_main 353 343 -10 getopt_main 636 626 -10 fdisk_main 2854 2844 -10 env_main 206 196 -10 dmesg_main 319 309 -10 conspy_main 1214 1204 -10 awk_main 981 971 -10 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 3/22 up/down: 81/-220) Total: -139 bytes text data bss dec hex filename 919373 906 14060 934339 e41c3 busybox_old 918969 906 14060 933935 e402f busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
105 lines
2.4 KiB
C
105 lines
2.4 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* ionice implementation for busybox based on linux-utils-ng 2.14
|
|
*
|
|
* Copyright (C) 2008 by <u173034@informatik.uni-oldenburg.de>
|
|
*
|
|
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
|
*/
|
|
|
|
//usage:#define ionice_trivial_usage
|
|
//usage: "[-c 1-3] [-n 0-7] [-p PID] [PROG]"
|
|
//usage:#define ionice_full_usage "\n\n"
|
|
//usage: "Change I/O priority and class\n"
|
|
//usage: "\n -c Class. 1:realtime 2:best-effort 3:idle"
|
|
//usage: "\n -n Priority"
|
|
|
|
#include <sys/syscall.h>
|
|
#include <asm/unistd.h>
|
|
#include "libbb.h"
|
|
|
|
static int ioprio_set(int which, int who, int ioprio)
|
|
{
|
|
return syscall(SYS_ioprio_set, which, who, ioprio);
|
|
}
|
|
|
|
static int ioprio_get(int which, int who)
|
|
{
|
|
return syscall(SYS_ioprio_get, which, who);
|
|
}
|
|
|
|
enum {
|
|
IOPRIO_WHO_PROCESS = 1,
|
|
IOPRIO_WHO_PGRP,
|
|
IOPRIO_WHO_USER
|
|
};
|
|
|
|
enum {
|
|
IOPRIO_CLASS_NONE,
|
|
IOPRIO_CLASS_RT,
|
|
IOPRIO_CLASS_BE,
|
|
IOPRIO_CLASS_IDLE
|
|
};
|
|
|
|
static const char to_prio[] ALIGN1 = "none\0realtime\0best-effort\0idle";
|
|
|
|
#define IOPRIO_CLASS_SHIFT 13
|
|
|
|
int ionice_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int ionice_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
/* Defaults */
|
|
int ioclass = 0;
|
|
int pri = 0;
|
|
int pid = 0; /* affect own porcess */
|
|
int opt;
|
|
enum {
|
|
OPT_n = 1,
|
|
OPT_c = 2,
|
|
OPT_p = 4,
|
|
};
|
|
|
|
/* Numeric params */
|
|
/* '+': stop at first non-option */
|
|
opt = getopt32(argv, "+n:+c:+p:+", &pri, &ioclass, &pid);
|
|
argv += optind;
|
|
|
|
if (opt & OPT_c) {
|
|
if (ioclass > 3)
|
|
bb_error_msg_and_die("bad class %d", ioclass);
|
|
// Do we need this (compat?)?
|
|
// if (ioclass == IOPRIO_CLASS_NONE)
|
|
// ioclass = IOPRIO_CLASS_BE;
|
|
// if (ioclass == IOPRIO_CLASS_IDLE) {
|
|
// //if (opt & OPT_n)
|
|
// // bb_error_msg("ignoring priority for idle class");
|
|
// pri = 7;
|
|
// }
|
|
}
|
|
|
|
if (!(opt & (OPT_n|OPT_c))) {
|
|
if (!(opt & OPT_p) && *argv)
|
|
pid = xatoi_positive(*argv);
|
|
|
|
pri = ioprio_get(IOPRIO_WHO_PROCESS, pid);
|
|
if (pri == -1)
|
|
bb_perror_msg_and_die("ioprio_%cet", 'g');
|
|
|
|
ioclass = (pri >> IOPRIO_CLASS_SHIFT) & 0x3;
|
|
pri &= 0xff;
|
|
printf((ioclass == IOPRIO_CLASS_IDLE) ? "%s\n" : "%s: prio %d\n",
|
|
nth_string(to_prio, ioclass), pri);
|
|
} else {
|
|
//printf("pri=%d class=%d val=%x\n",
|
|
//pri, ioclass, pri | (ioclass << IOPRIO_CLASS_SHIFT));
|
|
pri |= (ioclass << IOPRIO_CLASS_SHIFT);
|
|
if (ioprio_set(IOPRIO_WHO_PROCESS, pid, pri) == -1)
|
|
bb_perror_msg_and_die("ioprio_%cet", 's');
|
|
if (argv[0]) {
|
|
BB_EXECVP_or_die(argv);
|
|
}
|
|
}
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|