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Use getpriority()/setpriority() instead of deprecated nice()

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This is now similar to how renice(1) is implemented.
This commit is contained in:
sin 2014-01-28 17:10:09 +00:00
parent 43057f3a39
commit 203b52c38a
1 changed files with 12 additions and 6 deletions
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16
nice.c
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@ -3,6 +3,8 @@
#include <limits.h> #include <limits.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <sys/resource.h>
#include <sys/time.h>
#include <unistd.h> #include <unistd.h>
#include "util.h" #include "util.h"
@ -12,6 +14,7 @@ int
main(int argc, char **argv) main(int argc, char **argv)
{ {
long val = 10; long val = 10;
int savederrno;
ARGBEGIN { ARGBEGIN {
case 'n': case 'n':
@ -26,15 +29,18 @@ main(int argc, char **argv)
usage(); usage();
errno = 0; errno = 0;
nice((int)MAX(INT_MIN, MIN(val, INT_MAX))); val += getpriority(PRIO_PROCESS, 0);
if (errno != 0) if (errno != 0)
perror("can't adjust niceness"); weprintf("getpriority:");
val = MAX(PRIO_MIN, MIN(val, PRIO_MAX));
if (setpriority(PRIO_PROCESS, 0, val) != 0)
weprintf("setpriority:");
/* POSIX specifies the nice failure still invokes the command */ /* POSIX specifies the nice failure still invokes the command */
execvp(argv[0], argv); execvp(argv[0], argv);
/* reached only on failure */ savederrno = errno;
perror(argv[0]); weprintf("execvp %s:", argv[0]);
return (errno == ENOENT)? 127 : 126; return (savederrno == ENOENT)? 127 : 126;
} }
static void static void