ipcs: code shrink

function                                             old     new   delta
packed_usage                                       32539   32543      +4
format                                                 1       -      -1
do_shm                                               883     880      -3
do_sem                                               636     633      -3
do_msg                                               782     779      -3
ipcs_main                                           1049    1014     -35
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/4 up/down: 4/-45)             Total: -41 bytes

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

1 files changed, 15 insertions, 24 deletions

diff --git a/util-linux/ipcs.c b/util-linux/ipcs.c
index 7092ecd92..dc107eb95 100644
--- a/util-linux/ipcs.c
+++ b/util-linux/ipcs.c
@@ -101,8 +101,6 @@ union semun {
 #define TIME 4
 #define PID 5
 
-static char format;
-
 static void print_perms(int id, struct ipc_perm *ipcp)
 {
         struct passwd *pw;
@@ -125,8 +123,7 @@ static void print_perms(int id, struct ipc_perm *ipcp)
         else    printf(" %-10d\n", ipcp->gid);
 }
 
-
-static NOINLINE void do_shm(void)
+static NOINLINE void do_shm(int format)
 {
         int maxid, shmid, id;
         struct shmid_ds shmseg;
@@ -252,8 +249,7 @@ static NOINLINE void do_shm(void)
         }
 }
 
-
-static NOINLINE void do_sem(void)
+static NOINLINE void do_sem(int format)
 {
         int maxid, semid, id;
         struct semid_ds semary;
@@ -358,8 +354,7 @@ static NOINLINE void do_sem(void)
         }
 }
 
-
-static NOINLINE void do_msg(void)
+static NOINLINE void do_msg(int format)
 {
         int maxid, msqid, id;
         struct msqid_ds msgque;
@@ -466,7 +461,6 @@ static NOINLINE void do_msg(void)
         }
 }
 
-
 static void print_shm(int shmid)
 {
         struct shmid_ds shmds;
@@ -493,7 +487,6 @@ static void print_shm(int shmid)
         printf("change_time=%-26.24s\n\n", ctime(&shmds.shm_ctime));
 }
 
-
 static void print_msg(int msqid)
 {
         struct msqid_ds buf;
@@ -570,7 +563,7 @@ static void print_sem(int semid)
 }
 
 //usage:#define ipcs_trivial_usage
-//usage:       "[[-smq] -i shmid] | [[-asmq] [-tcplu]]"
+//usage:       "[[-smq] -i SHMID] | [[-asmq] [-tcplu]]"
 //usage:#define ipcs_full_usage "\n\n"
 //usage:       "        -i      Show specific resource"
 //usage:     "\nResource specification:"
@@ -588,20 +581,15 @@ static void print_sem(int semid)
 int ipcs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int ipcs_main(int argc UNUSED_PARAM, char **argv)
 {
-        int id = 0;
+        int format = 0;
         unsigned flags = 0;
         unsigned opt;
         char *opt_i;
-#define flag_print      (1<<0)
-#define flag_msg        (1<<1)
-#define flag_sem        (1<<2)
-#define flag_shm        (1<<3)
+#define flag_msg        (1<<0)
+#define flag_sem        (1<<1)
+#define flag_shm        (1<<2)
 
         opt = getopt32(argv, "i:aqsmtcplu", &opt_i);
-        if (opt & 0x1) { // -i
-                id = xatoi(opt_i);
-                flags |= flag_print;
-        }
         if (opt & 0x2) flags |= flag_msg | flag_sem | flag_shm; // -a
         if (opt & 0x4) flags |= flag_msg; // -q
         if (opt & 0x8) flags |= flag_sem; // -s
@@ -612,7 +600,10 @@ int ipcs_main(int argc UNUSED_PARAM, char **argv)
         if (opt & 0x100) format = LIMITS; // -l
         if (opt & 0x200) format = STATUS; // -u
 
-        if (flags & flag_print) {
+        if (opt & 1) { // -i
+                int id;
+
+                id = xatoi(opt_i);
                 if (flags & flag_shm) {
                         print_shm(id);
                         fflush_stdout_and_exit(EXIT_SUCCESS);
@@ -633,15 +624,15 @@ int ipcs_main(int argc UNUSED_PARAM, char **argv)
         bb_putchar('\n');
 
         if (flags & flag_msg) {
-                do_msg();
+                do_msg(format);
                 bb_putchar('\n');
         }
         if (flags & flag_shm) {
-                do_shm();
+                do_shm(format);
                 bb_putchar('\n');
         }
         if (flags & flag_sem) {
-                do_sem();
+                do_sem(format);
                 bb_putchar('\n');
         }
         fflush_stdout_and_exit(EXIT_SUCCESS);