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authorGravatar Denys Vlasenko <vda.linux@googlemail.com>2017-04-12 13:58:40 +0200
committerGravatar Denys Vlasenko <vda.linux@googlemail.com>2017-04-12 13:58:40 +0200
commit783d57af7bb2b851c16cf87df848e0365e5052da (patch)
tree71bb23e51b9cb40eac4a6fb831383134c1fc45a0 /miscutils/taskset.c
parentac47a00e2ec398b04c3141cd3434a6e4b95740b1 (diff)
downloadbusybox-783d57af7bb2b851c16cf87df848e0365e5052da.tar.gz
busybox-783d57af7bb2b851c16cf87df848e0365e5052da.tar.bz2
Sort some miscutils/ applets into coreutils or util-linux
No code changes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'miscutils/taskset.c')
-rw-r--r--miscutils/taskset.c221
1 files changed, 0 insertions, 221 deletions
diff --git a/miscutils/taskset.c b/miscutils/taskset.c
deleted file mode 100644
index 94a07383a..000000000
--- a/miscutils/taskset.c
+++ /dev/null
@@ -1,221 +0,0 @@
-/* vi: set sw=4 ts=4: */
-/*
- * taskset - retrieve or set a processes' CPU affinity
- * Copyright (c) 2006 Bernhard Reutner-Fischer
- *
- * Licensed under GPLv2 or later, see file LICENSE in this source tree.
- */
-
-//config:config TASKSET
-//config: bool "taskset"
-//config: default y
-//config: help
-//config: Retrieve or set a processes's CPU affinity.
-//config: This requires sched_{g,s}etaffinity support in your libc.
-//config:
-//config:config FEATURE_TASKSET_FANCY
-//config: bool "Fancy output"
-//config: default y
-//config: depends on TASKSET
-//config: help
-//config: Needed for machines with more than 32-64 CPUs:
-//config: affinity parameter 0xHHHHHHHHHHHHHHHHHHHH can be arbitrarily long
-//config: in this case. Otherwise, it is limited to sizeof(long).
-
-//applet:IF_TASKSET(APPLET(taskset, BB_DIR_USR_BIN, BB_SUID_DROP))
-//kbuild:lib-$(CONFIG_TASKSET) += taskset.o
-
-//usage:#define taskset_trivial_usage
-//usage: "[-p] [HEXMASK] PID | PROG ARGS"
-//usage:#define taskset_full_usage "\n\n"
-//usage: "Set or get CPU affinity\n"
-//usage: "\n -p Operate on an existing PID"
-//usage:
-//usage:#define taskset_example_usage
-//usage: "$ taskset 0x7 ./dgemm_test&\n"
-//usage: "$ taskset -p 0x1 $!\n"
-//usage: "pid 4790's current affinity mask: 7\n"
-//usage: "pid 4790's new affinity mask: 1\n"
-//usage: "$ taskset 0x7 /bin/sh -c './taskset -p 0x1 $$'\n"
-//usage: "pid 6671's current affinity mask: 1\n"
-//usage: "pid 6671's new affinity mask: 1\n"
-//usage: "$ taskset -p 1\n"
-//usage: "pid 1's current affinity mask: 3\n"
-/*
- * Not yet implemented:
- * -a/--all-tasks (affect all threads)
- * needs to get TIDs from /proc/PID/task/ and use _them_ as "pid" in sched_setaffinity(pid)
- * -c/--cpu-list (specify CPUs via "1,3,5-7")
- */
-
-#include <sched.h>
-#include "libbb.h"
-
-typedef unsigned long ul;
-#define SZOF_UL (unsigned)(sizeof(ul))
-#define BITS_UL (unsigned)(sizeof(ul)*8)
-#define MASK_UL (unsigned)(sizeof(ul)*8 - 1)
-
-#if ENABLE_FEATURE_TASKSET_FANCY
-#define TASKSET_PRINTF_MASK "%s"
-/* craft a string from the mask */
-static char *from_mask(const ul *mask, unsigned sz_in_bytes)
-{
- char *str = xzalloc((sz_in_bytes+1) * 2); /* we will leak it */
- char *p = str;
- for (;;) {
- ul v = *mask++;
- if (SZOF_UL == 4)
- p += sprintf(p, "%08lx", v);
- if (SZOF_UL == 8)
- p += sprintf(p, "%016lx", v);
- if (SZOF_UL == 16)
- p += sprintf(p, "%032lx", v); /* :) */
- sz_in_bytes -= SZOF_UL;
- if ((int)sz_in_bytes <= 0)
- break;
- }
- while (str[0] == '0' && str[1])
- str++;
- return str;
-}
-#else
-#define TASKSET_PRINTF_MASK "%lx"
-static unsigned long long from_mask(ul *mask, unsigned sz_in_bytes UNUSED_PARAM)
-{
- return *mask;
-}
-#endif
-
-static unsigned long *get_aff(int pid, unsigned *sz)
-{
- int r;
- unsigned long *mask = NULL;
- unsigned sz_in_bytes = *sz;
-
- for (;;) {
- mask = xrealloc(mask, sz_in_bytes);
- r = sched_getaffinity(pid, sz_in_bytes, (void*)mask);
- if (r == 0)
- break;
- sz_in_bytes *= 2;
- if (errno == EINVAL && (int)sz_in_bytes > 0)
- continue;
- bb_perror_msg_and_die("can't %cet pid %d's affinity", 'g', pid);
- }
- //bb_error_msg("get mask[0]:%lx sz_in_bytes:%d", mask[0], sz_in_bytes);
- *sz = sz_in_bytes;
- return mask;
-}
-
-int taskset_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int taskset_main(int argc UNUSED_PARAM, char **argv)
-{
- ul *mask;
- unsigned mask_size_in_bytes;
- pid_t pid = 0;
- unsigned opt_p;
- const char *current_new;
- char *aff;
-
- /* NB: we mimic util-linux's taskset: -p does not take
- * an argument, i.e., "-pN" is NOT valid, only "-p N"!
- * Indeed, util-linux-2.13-pre7 uses:
- * getopt_long(argc, argv, "+pchV", ...), not "...p:..." */
-
- opt_complementary = "-1"; /* at least 1 arg */
- opt_p = getopt32(argv, "+p");
- argv += optind;
-
- aff = *argv++;
- if (opt_p) {
- char *pid_str = aff;
- if (*argv) { /* "-p <aff> <pid> ...rest.is.ignored..." */
- pid_str = *argv; /* NB: *argv != NULL in this case */
- }
- /* else it was just "-p <pid>", and *argv == NULL */
- pid = xatoul_range(pid_str, 1, ((unsigned)(pid_t)ULONG_MAX) >> 1);
- } else {
- /* <aff> <cmd...> */
- if (!*argv)
- bb_show_usage();
- }
-
- mask_size_in_bytes = SZOF_UL;
- current_new = "current";
- print_aff:
- mask = get_aff(pid, &mask_size_in_bytes);
- if (opt_p) {
- printf("pid %d's %s affinity mask: "TASKSET_PRINTF_MASK"\n",
- pid, current_new, from_mask(mask, mask_size_in_bytes));
- if (*argv == NULL) {
- /* Either it was just "-p <pid>",
- * or it was "-p <aff> <pid>" and we came here
- * for the second time (see goto below) */
- return EXIT_SUCCESS;
- }
- *argv = NULL;
- current_new = "new";
- }
- memset(mask, 0, mask_size_in_bytes);
-
- /* Affinity was specified, translate it into mask */
- /* it is always in hex, skip "0x" if it exists */
- if (aff[0] == '0' && (aff[1]|0x20) == 'x')
- aff += 2;
-
- if (!ENABLE_FEATURE_TASKSET_FANCY) {
- mask[0] = xstrtoul(aff, 16);
- } else {
- unsigned i;
- char *last_char;
-
- i = 0; /* bit pos in mask[] */
-
- /* aff is ASCII hex string, accept very long masks in this form.
- * Process hex string AABBCCDD... to ulong mask[]
- * from the rightmost nibble, which is least-significant.
- * Bits not fitting into mask[] are ignored: (example: 1234
- * in 12340000000000000000000000000000000000000ff)
- */
- last_char = strchrnul(aff, '\0');
- while (last_char > aff) {
- char c;
- ul val;
-
- last_char--;
- c = *last_char;
- if (isdigit(c))
- val = c - '0';
- else if ((c|0x20) >= 'a' && (c|0x20) <= 'f')
- val = (c|0x20) - ('a' - 10);
- else
- bb_error_msg_and_die("bad affinity '%s'", aff);
-
- if (i < mask_size_in_bytes * 8) {
- mask[i / BITS_UL] |= val << (i & MASK_UL);
- //bb_error_msg("bit %d set", i);
- }
- /* else:
- * We can error out here, but we don't.
- * For one, kernel itself ignores bits in mask[]
- * which do not map to any CPUs:
- * if mask[] has one 32-bit long element,
- * but you have only 8 CPUs, all bits beyond first 8
- * are ignored, silently.
- * No point in making bits past 31th to be errors.
- */
- i += 4;
- }
- }
-
- /* Set pid's or our own (pid==0) affinity */
- if (sched_setaffinity(pid, mask_size_in_bytes, (void*)mask))
- bb_perror_msg_and_die("can't %cet pid %d's affinity", 's', pid);
- //bb_error_msg("set mask[0]:%lx", mask[0]);
-
- if (!argv[0]) /* "-p <aff> <pid> [...ignored...]" */
- goto print_aff; /* print new affinity and exit */
-
- BB_EXECVP_or_die(argv);
-}