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-rw-r--r--toys/taskset.c110
1 files changed, 0 insertions, 110 deletions
diff --git a/toys/taskset.c b/toys/taskset.c
deleted file mode 100644
index 7ac3b572..00000000
--- a/toys/taskset.c
+++ /dev/null
@@ -1,110 +0,0 @@
-/* vi: set sw=4 ts=4:
- *
- * taskset.c - Retrieve or set the CPU affinity of a process.
- *
- * Copyright 2012 Elie De Brauwer <eliedebrauwer@gmail.com>
- *
- * No standard.
-
-USE_TASKSET(NEWTOY(taskset, "<1^pa", TOYFLAG_BIN|TOYFLAG_STAYROOT))
-
-config TASKSET
- bool "taskset"
- default y
- help
- usage: taskset [-ap] [mask] [PID | cmd [args...]]
-
- Launch a new task which may only run on certain processors, or change
- the processor affinity of an exisitng PID.
-
- Mask is a hex string where each bit represents a processor the process
- is allowed to run on. PID without a mask displays existing affinity.
-
- -p Set/get the affinity of given PID instead of a new command.
- -a Set/get the affinity of all threads of the PID.
-*/
-
-#include "toys.h"
-
-#define FLAG_a 0x1
-#define FLAG_p 0x2
-
-// Prototype for syscall wrappers sched.h refuses to give us
-int sched_setaffinity(pid_t pid, size_t size, void *cpuset);
-int sched_getaffinity(pid_t pid, size_t size, void *cpuset);
-
-// mask is an array of long, which makes the layout a bit weird on big
-// endian systems but as long as it's consistent...
-
-static void do_taskset(pid_t pid, int quiet)
-{
- unsigned long *mask = (unsigned long *)toybuf;
- char *s = *toys.optargs, *failed = "failed to %s %d's affinity";
- int i, j, k;
-
- for (i=0; ; i++) {
- if (!quiet) {
- int j = sizeof(toybuf), flag = 0;
-
- if (sched_getaffinity(pid, sizeof(toybuf), (void *)mask))
- perror_exit(failed, "get", pid);
-
- printf("pid %d's %s affinity mask: ", pid, i ? "new" : "current");
-
- while (j--) {
- int x = 255 & (mask[j/sizeof(long)] >> (8*(j&(sizeof(long)-1))));
-
- if (flag) printf("%02x", x);
- else if (x) {
- flag++;
- printf("%x", x);
- }
- }
- putchar('\n');
- }
-
- if (i || toys.optc < 2) return;
-
- memset(toybuf, 0, sizeof(toybuf));
- k = strlen(s = *toys.optargs);
- s += k;
- for (j = 0; j<k; j++) {
- unsigned long digit = *(--s) - '0';
-
- if (digit > 9) digit = 10 + tolower(*s)-'a';
- if (digit > 15) error_exit("bad mask '%s'", *toys.optargs);
- mask[j/(2*sizeof(long))] |= digit << 4*(j&((2*sizeof(long))-1));
- }
-
- if (sched_setaffinity(pid, sizeof(toybuf), (void *)mask))
- perror_exit(failed, "set", pid);
- }
-}
-
-static int task_callback(struct dirtree *new)
-{
- if (!new->parent) return DIRTREE_RECURSE;
- if (isdigit(*new->name)) do_taskset(atoi(new->name), 0);
-
- return 0;
-}
-
-void taskset_main(void)
-{
- if (!(toys.optflags & FLAG_p)) {
- if (toys.optc < 2) error_exit("Needs 2 args");
- do_taskset(getpid(), 1);
- xexec(toys.optargs+1);
- } else {
- char *c;
- pid_t pid = strtol(toys.optargs[toys.optc-1], &c, 10);
-
- if (*c) error_exit("Not int %s", toys.optargs[1]);
-
- if (toys.optflags & FLAG_a) {
- char buf[33];
- sprintf(buf, "/proc/%ld/task/", (long)pid);
- dirtree_read(buf, task_callback);
- } else do_taskset(pid, 0);
- }
-}