ionice: implement -t

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

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 10 insertions, 7 deletions

diff --git a/util-linux/ionice.c b/util-linux/ionice.c
index ff5177abb..82bd309d1 100644
--- a/util-linux/ionice.c
+++ b/util-linux/ionice.c
@@ -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) {
@@ -105,7 +107,8 @@ 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)
-                        bb_perror_msg_and_die("ioprio_%cet", 's');
+                        if (!(opt & OPT_t))
+                                bb_perror_msg_and_die("ioprio_%cet", 's');
                 if (argv[0]) {
                         BB_EXECVP_or_die(argv);
                 }