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ionice: implement -t

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function                                             old     new   delta
packed_usage                                       33618   33629     +11
ionice_main                                          272     282     +10
.rodata                                           103250  103251      +1
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(add/remove: 0/0 grow/shrink: 3/0 up/down: 22/0)               Total: 22 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2021-06-17 13:45:13 +02:00
parent c113796884
commit f02b64de86
1 changed files with 10 additions and 7 deletions
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15
util-linux/ionice.c
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@ -18,12 +18,13 @@
//kbuild:lib-$(CONFIG_IONICE) += ionice.o
//usage:#define ionice_trivial_usage
//usage: "[-c 1-3] [-n 0-7] { -p PID | PROG ARGS }"
//usage: "[-c 1-3] [-n 0-7] [-t] { -p PID | PROG ARGS }"
//TODO: | -P PGID | -u UID; also -pPu can take _list of_ IDs
//usage:#define ionice_full_usage "\n\n"
//usage: "Change I/O priority and class\n"
//usage: "\n -c N Class. 1:realtime 2:best-effort 3:idle"
//usage: "\n -n N Priority"
//usage: "\n -t Ignore errors"
#include <sys/syscall.h>
#include <asm/unistd.h>
@ -65,14 +66,15 @@ int ionice_main(int argc UNUSED_PARAM, char **argv)
int pid = 0; /* affect own process */
int opt;
enum {
OPT_n = 1,
OPT_c = 2,
OPT_p = 4,
OPT_n = 1 << 0,
OPT_c = 1 << 1,
OPT_p = 1 << 2,
OPT_t = 1 << 3,
};
/* Numeric params */
/* '+': stop at first non-option */
opt = getopt32(argv, "+n:+c:+p:+", &pri, &ioclass, &pid);
/* numeric params for -n -c -p */
opt = getopt32(argv, "+""n:+c:+p:+t", &pri, &ioclass, &pid);
argv += optind;
if (opt & OPT_c) {
@ -105,6 +107,7 @@ int ionice_main(int argc UNUSED_PARAM, char **argv)
//pri, ioclass, pri | (ioclass << IOPRIO_CLASS_SHIFT));
pri |= (ioclass << IOPRIO_CLASS_SHIFT);
if (ioprio_set(IOPRIO_WHO_PROCESS, pid, pri) == -1)
if (!(opt & OPT_t))
bb_perror_msg_and_die("ioprio_%cet", 's');
if (argv[0]) {
BB_EXECVP_or_die(argv);