*: replace select-for-one descriptor with poll, it's smaller.
$ ./.cmk bloatcheck function old new delta readit 406 364 -42 syslogd_main 1249 1206 -43 traceroute_main 4115 4060 -55 mysleep 112 45 -67 arpping 579 441 -138 tftp 1575 1182 -393 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/6 up/down: 0/-738) Total: -738 bytes text data bss dec hex filename 770580 1051 10764 782395 bf03b busybox_old 769820 1051 10764 781635 bed43 busybox_unstripped
This commit is contained in:
Denis Vlasenko
parent
40f0bcf9d3
commit
87f3b26b3a
36
editors/vi.c
36
editors/vi.c
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@ -237,7 +237,8 @@ static char *yank_delete(char *, char *, int, int); // yank text[] into register
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static void show_help(void); // display some help info
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static void rawmode(void); // set "raw" mode on tty
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static void cookmode(void); // return to "cooked" mode on tty
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static int mysleep(int); // sleep for 'h' 1/100 seconds
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// sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready)
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static int mysleep(int);
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static char readit(void); // read (maybe cursor) key from stdin
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static char get_one_char(void); // read 1 char from stdin
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static int file_size(const char *); // what is the byte size of "fn"
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@ -2134,17 +2135,11 @@ static void catch_sig(int sig)
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static int mysleep(int hund) // sleep for 'h' 1/100 seconds
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{
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fd_set rfds;
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struct timeval tv;
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struct pollfd pfd[1];
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// Don't hang- Wait 5/100 seconds- 1 Sec= 1000000
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fflush(stdout);
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FD_ZERO(&rfds);
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FD_SET(0, &rfds);
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tv.tv_sec = 0;
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tv.tv_usec = hund * 10000;
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select(1, &rfds, NULL, NULL, &tv);
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return FD_ISSET(0, &rfds);
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pfd[0].fd = 0;
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pfd[0].events = POLLIN;
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return poll(pfd, 1, hund*10) > 0;
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}
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#define readbuffer bb_common_bufsiz1
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@ -2217,25 +2212,20 @@ static char readit(void) // read (maybe cursor) key from stdin
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if (n <= 0)
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return 0; // error
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if (readbuffer[0] == 27) {
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fd_set rfds;
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struct timeval tv;
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// This is an ESC char. Is this Esc sequence?
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// Could be bare Esc key. See if there are any
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// more chars to read after the ESC. This would
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// be a Function or Cursor Key sequence.
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FD_ZERO(&rfds);
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FD_SET(0, &rfds);
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tv.tv_sec = 0;
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tv.tv_usec = 50000; // Wait 5/100 seconds- 1 Sec=1000000
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struct pollfd pfd[1];
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pfd[0].fd = 0;
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pfd[0].events = POLLIN;
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// Wait 50 ms
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// keep reading while there are input chars and room in buffer
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while (select(1, &rfds, NULL, NULL, &tv) > 0 && n <= (MAX_LINELEN - 5)) {
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while (poll(pfd, 1, 50) > 0 && n <= (MAX_LINELEN - 5)) {
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// read the rest of the ESC string
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int r = read(0, (void *) (readbuffer + n), MAX_LINELEN - n);
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if (r > 0) {
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int r = read(0, readbuffer + n, MAX_LINELEN - n);
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if (r > 0)
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n += r;
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}
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}
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}
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readed_for_parse = n;
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@ -23,10 +23,10 @@
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#if ENABLE_FEATURE_TFTP_GET || ENABLE_FEATURE_TFTP_PUT
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#define TFTP_BLOCKSIZE_DEFAULT 512 /* according to RFC 1350, don't change */
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#define TFTP_TIMEOUT 50000 /* 50ms, in microseconds */
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#define TFTP_MAXTIMEOUT 999000 /* about 1 second, in microseconds */
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#define TFTP_NUM_RETRIES 12 /* number of backed-off retries */
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#define TFTP_BLOCKSIZE_DEFAULT 512 /* according to RFC 1350, don't change */
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#define TFTP_TIMEOUT_MS 50
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#define TFTP_MAXTIMEOUT_MS 2000
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#define TFTP_NUM_RETRIES 12 /* number of backed-off retries */
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/* opcodes we support */
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#define TFTP_RRQ 1
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@ -114,9 +114,8 @@ static int tftp( USE_GETPUT(const int cmd,)
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const char *remotefile, const int localfd,
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unsigned port, int tftp_bufsize)
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{
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struct timeval tv;
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fd_set rfds;
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int socketfd;
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struct pollfd pfd[1];
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#define socketfd (pfd[0].fd)
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int len;
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int send_len;
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USE_FEATURE_TFTP_BLOCKSIZE(smallint want_option_ack = 0;)
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@ -124,7 +123,7 @@ static int tftp( USE_GETPUT(const int cmd,)
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uint16_t opcode;
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uint16_t block_nr = 1;
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uint16_t recv_blk;
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int retries, waittime;
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int retries, waittime_ms;
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char *cp;
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unsigned org_port;
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@ -208,7 +207,7 @@ static int tftp( USE_GETPUT(const int cmd,)
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* for potential resend */
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retries = TFTP_NUM_RETRIES; /* re-initialize */
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waittime = TFTP_TIMEOUT;
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waittime_ms = TFTP_TIMEOUT_MS;
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send_again:
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#if ENABLE_DEBUG_TFTP
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@ -224,11 +223,9 @@ static int tftp( USE_GETPUT(const int cmd,)
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recv_again:
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/* Receive packet */
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tv.tv_sec = 0;
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tv.tv_usec = waittime;
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FD_ZERO(&rfds);
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FD_SET(socketfd, &rfds);
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switch (select(socketfd + 1, &rfds, NULL, NULL, &tv)) {
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/*pfd[0].fd = socketfd;*/
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pfd[0].events = POLLIN;
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switch (poll(pfd, 1, waittime_ms)) {
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unsigned from_port;
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case 1:
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from->len = peer_lsa->len;
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@ -258,14 +255,14 @@ static int tftp( USE_GETPUT(const int cmd,)
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}
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/* exponential backoff with limit */
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waittime += waittime/2;
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if (waittime > TFTP_MAXTIMEOUT) {
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waittime = TFTP_MAXTIMEOUT;
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waittime_ms += waittime_ms/2;
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if (waittime_ms > TFTP_MAXTIMEOUT_MS) {
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waittime_ms = TFTP_MAXTIMEOUT_MS;
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}
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goto send_again; /* resend last sent pkt */
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default:
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bb_perror_msg("select");
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bb_perror_msg("poll");
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goto ret;
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}
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process_pkt:
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@ -346,10 +346,10 @@ static int optlen; /* length of ip options */
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struct globals {
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/* last inbound (icmp) packet */
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unsigned char packet[512];
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struct sockaddr_storage whereto; /* Who to try to reach */
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struct sockaddr_storage wherefrom; /* Who we are */
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/* last inbound (icmp) packet */
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unsigned char packet[512];
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#if ENABLE_FEATURE_TRACEROUTE_SOURCE_ROUTE
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/* Maximum number of gateways (include room for one noop) */
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#define NGATEWAYS ((int)((MAX_IPOPTLEN - IPOPT_MINOFF - 1) / sizeof(uint32_t)))
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@ -359,7 +359,7 @@ struct globals {
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};
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#define G (*ptr_to_globals)
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#define INIT_G() PTR_TO_GLOBALS = xzalloc(sizeof(G))
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#define packet (G.packet )
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#define whereto (G.whereto )
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#define wherefrom (G.wherefrom)
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@ -537,21 +537,15 @@ findsaddr(const struct sockaddr_in *to, struct sockaddr_in *from)
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static int
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wait_for_reply(int sock, struct sockaddr_in *fromp)
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{
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fd_set fds;
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struct timeval tvwait;
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struct pollfd pfd[1];
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int cc = 0;
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socklen_t fromlen = sizeof(*fromp);
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FD_ZERO(&fds);
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FD_SET(sock, &fds);
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tvwait.tv_sec = waittime;
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tvwait.tv_usec = 0;
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if (select(sock + 1, &fds, NULL, NULL, &tvwait) > 0)
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cc = recvfrom(sock, (char *)packet, sizeof(packet), 0,
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pfd[0].fd = sock;
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pfd[0].events = POLLIN;
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if (poll(pfd, 1, waittime * 1000) > 0)
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cc = recvfrom(sock, packet, sizeof(packet), 0,
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(struct sockaddr *)fromp, &fromlen);
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return cc;
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}
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@ -930,7 +924,7 @@ int traceroute_main(int argc, char **argv)
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llist_t *source_route_list = NULL;
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#endif
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PTR_TO_GLOBALS = xzalloc(sizeof(G));
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INIT_G();
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from = (struct sockaddr_in *)&wherefrom;
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to = (struct sockaddr_in *)&whereto;
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@ -37,14 +37,12 @@ struct arpMsg {
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int arpping(uint32_t test_ip, uint32_t from_ip, uint8_t *from_mac, const char *interface)
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{
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int timeout = 2;
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int s; /* socket */
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int timeout_ms = 2000;
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struct pollfd pfd[1];
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#define s (pfd[0].fd) /* socket */
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int rv = 1; /* "no reply received" yet */
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struct sockaddr addr; /* for interface name */
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struct arpMsg arp;
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fd_set fdset;
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struct timeval tm;
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unsigned prevTime;
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s = socket(PF_PACKET, SOCK_PACKET, htons(ETH_P_ARP));
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if (s == -1) {
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@ -80,18 +78,17 @@ int arpping(uint32_t test_ip, uint32_t from_ip, uint8_t *from_mac, const char *i
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/* wait for arp reply, and check it */
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do {
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int r;
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prevTime = monotonic_sec();
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FD_ZERO(&fdset);
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FD_SET(s, &fdset);
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tm.tv_sec = timeout;
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tm.tv_usec = 0;
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r = select(s + 1, &fdset, NULL, NULL, &tm);
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unsigned prevTime = monotonic_us();
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pfd[0].events = POLLIN;
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r = poll(pfd, 1, timeout_ms);
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if (r < 0) {
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bb_perror_msg("error on ARPING request");
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if (errno != EINTR)
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if (errno != EINTR) {
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bb_perror_msg("poll");
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break;
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}
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} else if (r) {
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if (recv(s, &arp, sizeof(arp), 0) < 0)
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if (read(s, &arp, sizeof(arp)) < 0)
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break;
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if (arp.operation == htons(ARPOP_REPLY)
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&& memcmp(arp.tHaddr, from_mac, 6) == 0
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@ -101,8 +98,8 @@ int arpping(uint32_t test_ip, uint32_t from_ip, uint8_t *from_mac, const char *i
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break;
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}
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}
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timeout -= monotonic_sec() - prevTime;
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} while (timeout > 0);
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timeout_ms -= (monotonic_us() - prevTime) / 1000;
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} while (timeout_ms > 0);
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ret:
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close(s);
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@ -11589,6 +11589,7 @@ readcmd(int argc, char **argv)
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#endif
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#if ENABLE_ASH_READ_TIMEOUT
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if (ts.tv_sec || ts.tv_usec) {
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// TODO: replace with poll, it is smaller
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FD_ZERO(&set);
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FD_SET(0, &set);
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@ -471,8 +471,8 @@ static void do_syslogd(void) ATTRIBUTE_NORETURN;
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static void do_syslogd(void)
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{
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struct sockaddr_un sunx;
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int sock_fd;
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fd_set fds;
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struct pollfd pfd[1];
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#define sock_fd (pfd[0].fd)
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char *dev_log_name;
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/* Set up signal handlers */
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@ -526,20 +526,20 @@ static void do_syslogd(void)
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(char*)"syslogd started: BusyBox v" BB_VER, 0);
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for (;;) {
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FD_ZERO(&fds);
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FD_SET(sock_fd, &fds);
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if (select(sock_fd + 1, &fds, NULL, NULL, NULL) < 0) {
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/*pfd[0].fd = sock_fd;*/
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pfd[0].events = POLLIN;
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pfd[0].revents = 0;
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if (poll(pfd, 1, -1) < 0) { /* -1: no timeout */
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if (errno == EINTR) {
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/* alarm may have happened */
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continue;
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}
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bb_perror_msg_and_die("select");
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bb_perror_msg_and_die("poll");
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}
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if (FD_ISSET(sock_fd, &fds)) {
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if (pfd[0].revents) {
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int i;
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i = recv(sock_fd, G.recvbuf, MAX_READ - 1, 0);
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i = read(sock_fd, G.recvbuf, MAX_READ - 1);
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if (i <= 0)
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bb_perror_msg_and_die("UNIX socket error");
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/* TODO: maybe suppress duplicates? */
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@ -559,7 +559,7 @@ static void do_syslogd(void)
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#endif
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G.recvbuf[i] = '\0';
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split_escape_and_log(G.recvbuf, i);
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} /* FD_ISSET() */
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}
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} /* for */
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}
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