[1765] | 1 | /*
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[2725] | 2 | * Licensed under GPLv2, see file LICENSE in this source tree.
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| 3 | *
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| 4 | * Based on nanotop.c from floppyfw project
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| 5 | *
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| 6 | * Contact me: vda.linux@googlemail.com
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| 7 | */
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[1765] | 8 |
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[3232] | 9 | //config:config NMETER
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| 10 | //config: bool "nmeter"
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| 11 | //config: default y
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| 12 | //config: help
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| 13 | //config: Prints selected system stats continuously, one line per update.
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| 14 |
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| 15 | //applet:IF_NMETER(APPLET(nmeter, BB_DIR_USR_BIN, BB_SUID_DROP))
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| 16 |
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| 17 | //kbuild:lib-$(CONFIG_NMETER) += nmeter.o
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| 18 |
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| 19 | //usage:#define nmeter_trivial_usage
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| 20 | //usage: "[-d MSEC] FORMAT_STRING"
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| 21 | //usage:#define nmeter_full_usage "\n\n"
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| 22 | //usage: "Monitor system in real time"
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| 23 | //usage: "\n"
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| 24 | //usage: "\n -d MSEC Milliseconds between updates (default:1000)"
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| 25 | //usage: "\n"
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| 26 | //usage: "\nFormat specifiers:"
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| 27 | //usage: "\n %Nc or %[cN] CPU. N - bar size (default:10)"
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| 28 | //usage: "\n (displays: S:system U:user N:niced D:iowait I:irq i:softirq)"
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| 29 | //usage: "\n %[nINTERFACE] Network INTERFACE"
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| 30 | //usage: "\n %m Allocated memory"
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| 31 | //usage: "\n %[mf] Free memory"
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| 32 | //usage: "\n %[mt] Total memory"
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| 33 | //usage: "\n %s Allocated swap"
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| 34 | //usage: "\n %f Number of used file descriptors"
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| 35 | //usage: "\n %Ni Total/specific IRQ rate"
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| 36 | //usage: "\n %x Context switch rate"
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| 37 | //usage: "\n %p Forks"
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| 38 | //usage: "\n %[pn] # of processes"
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| 39 | //usage: "\n %b Block io"
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| 40 | //usage: "\n %Nt Time (with N decimal points)"
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| 41 | //usage: "\n %r Print <cr> instead of <lf> at EOL"
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| 42 |
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[1765] | 43 | //TODO:
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| 44 | // simplify code
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| 45 | // /proc/locks
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| 46 | // /proc/stat:
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| 47 | // disk_io: (3,0):(22272,17897,410702,4375,54750)
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| 48 | // btime 1059401962
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| 49 | //TODO: use sysinfo libc call/syscall, if appropriate
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| 50 | // (faster than open/read/close):
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| 51 | // sysinfo({uptime=15017, loads=[5728, 15040, 16480]
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| 52 | // totalram=2107416576, freeram=211525632, sharedram=0, bufferram=157204480}
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| 53 | // totalswap=134209536, freeswap=134209536, procs=157})
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| 54 |
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| 55 | #include "libbb.h"
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| 56 |
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| 57 | typedef unsigned long long ullong;
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| 58 |
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[2725] | 59 | enum { /* Preferably use powers of 2 */
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| 60 | PROC_MIN_FILE_SIZE = 256,
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| 61 | PROC_MAX_FILE_SIZE = 16 * 1024,
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| 62 | };
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[1765] | 63 |
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| 64 | typedef struct proc_file {
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| 65 | char *file;
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[2725] | 66 | int file_sz;
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[1765] | 67 | smallint last_gen;
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| 68 | } proc_file;
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| 69 |
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| 70 | static const char *const proc_name[] = {
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| 71 | "stat", // Must match the order of proc_file's!
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| 72 | "loadavg",
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| 73 | "net/dev",
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| 74 | "meminfo",
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| 75 | "diskstats",
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| 76 | "sys/fs/file-nr"
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| 77 | };
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| 78 |
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| 79 | struct globals {
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| 80 | // Sample generation flip-flop
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| 81 | smallint gen;
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| 82 | // Linux 2.6? (otherwise assumes 2.4)
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| 83 | smallint is26;
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| 84 | // 1 if sample delay is not an integer fraction of a second
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| 85 | smallint need_seconds;
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| 86 | char *cur_outbuf;
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| 87 | const char *final_str;
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| 88 | int delta;
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| 89 | int deltanz;
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| 90 | struct timeval tv;
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| 91 | #define first_proc_file proc_stat
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| 92 | proc_file proc_stat; // Must match the order of proc_name's!
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| 93 | proc_file proc_loadavg;
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| 94 | proc_file proc_net_dev;
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| 95 | proc_file proc_meminfo;
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| 96 | proc_file proc_diskstats;
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| 97 | proc_file proc_sys_fs_filenr;
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| 98 | };
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| 99 | #define G (*ptr_to_globals)
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| 100 | #define gen (G.gen )
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| 101 | #define is26 (G.is26 )
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| 102 | #define need_seconds (G.need_seconds )
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| 103 | #define cur_outbuf (G.cur_outbuf )
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| 104 | #define final_str (G.final_str )
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| 105 | #define delta (G.delta )
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| 106 | #define deltanz (G.deltanz )
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| 107 | #define tv (G.tv )
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| 108 | #define proc_stat (G.proc_stat )
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| 109 | #define proc_loadavg (G.proc_loadavg )
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| 110 | #define proc_net_dev (G.proc_net_dev )
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| 111 | #define proc_meminfo (G.proc_meminfo )
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| 112 | #define proc_diskstats (G.proc_diskstats )
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| 113 | #define proc_sys_fs_filenr (G.proc_sys_fs_filenr)
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| 114 | #define INIT_G() do { \
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[2725] | 115 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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| 116 | cur_outbuf = outbuf; \
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| 117 | final_str = "\n"; \
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| 118 | deltanz = delta = 1000000; \
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| 119 | } while (0)
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[1765] | 120 |
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| 121 | // We depend on this being a char[], not char* - we take sizeof() of it
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| 122 | #define outbuf bb_common_bufsiz1
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| 123 |
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| 124 | static inline void reset_outbuf(void)
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| 125 | {
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| 126 | cur_outbuf = outbuf;
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| 127 | }
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| 128 |
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| 129 | static inline int outbuf_count(void)
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| 130 | {
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| 131 | return cur_outbuf - outbuf;
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| 132 | }
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| 133 |
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| 134 | static void print_outbuf(void)
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| 135 | {
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| 136 | int sz = cur_outbuf - outbuf;
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| 137 | if (sz > 0) {
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[2725] | 138 | xwrite(STDOUT_FILENO, outbuf, sz);
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[1765] | 139 | cur_outbuf = outbuf;
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| 140 | }
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| 141 | }
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| 142 |
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| 143 | static void put(const char *s)
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| 144 | {
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| 145 | int sz = strlen(s);
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| 146 | if (sz > outbuf + sizeof(outbuf) - cur_outbuf)
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| 147 | sz = outbuf + sizeof(outbuf) - cur_outbuf;
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| 148 | memcpy(cur_outbuf, s, sz);
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| 149 | cur_outbuf += sz;
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| 150 | }
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| 151 |
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| 152 | static void put_c(char c)
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| 153 | {
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| 154 | if (cur_outbuf < outbuf + sizeof(outbuf))
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| 155 | *cur_outbuf++ = c;
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| 156 | }
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| 157 |
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| 158 | static void put_question_marks(int count)
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| 159 | {
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| 160 | while (count--)
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| 161 | put_c('?');
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| 162 | }
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| 163 |
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[2725] | 164 | static void readfile_z(proc_file *pf, const char* fname)
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[1765] | 165 | {
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| 166 | // open_read_close() will do two reads in order to be sure we are at EOF,
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| 167 | // and we don't need/want that.
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[2725] | 168 | int fd;
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| 169 | int sz, rdsz;
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| 170 | char *buf;
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[1765] | 171 |
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[2725] | 172 | sz = pf->file_sz;
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| 173 | buf = pf->file;
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| 174 | if (!buf) {
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| 175 | buf = xmalloc(PROC_MIN_FILE_SIZE);
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| 176 | sz = PROC_MIN_FILE_SIZE;
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| 177 | }
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| 178 | again:
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| 179 | fd = xopen(fname, O_RDONLY);
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[1765] | 180 | buf[0] = '\0';
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[2725] | 181 | rdsz = read(fd, buf, sz-1);
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| 182 | close(fd);
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| 183 | if (rdsz > 0) {
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| 184 | if (rdsz == sz-1 && sz < PROC_MAX_FILE_SIZE) {
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| 185 | sz *= 2;
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| 186 | buf = xrealloc(buf, sz);
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| 187 | goto again;
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| 188 | }
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| 189 | buf[rdsz] = '\0';
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[1765] | 190 | }
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[2725] | 191 | pf->file_sz = sz;
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| 192 | pf->file = buf;
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[1765] | 193 | }
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| 194 |
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| 195 | static const char* get_file(proc_file *pf)
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| 196 | {
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| 197 | if (pf->last_gen != gen) {
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| 198 | pf->last_gen = gen;
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[2725] | 199 | readfile_z(pf, proc_name[pf - &first_proc_file]);
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[1765] | 200 | }
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| 201 | return pf->file;
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| 202 | }
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| 203 |
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[2725] | 204 | static ullong read_after_slash(const char *p)
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[1765] | 205 | {
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| 206 | p = strchr(p, '/');
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| 207 | if (!p) return 0;
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| 208 | return strtoull(p+1, NULL, 10);
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| 209 | }
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| 210 |
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| 211 | enum conv_type { conv_decimal, conv_slash };
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| 212 |
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| 213 | // Reads decimal values from line. Values start after key, for example:
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| 214 | // "cpu 649369 0 341297 4336769..." - key is "cpu" here.
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| 215 | // Values are stored in vec[]. arg_ptr has list of positions
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| 216 | // we are interested in: for example: 1,2,5 - we want 1st, 2nd and 5th value.
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| 217 | static int vrdval(const char* p, const char* key,
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| 218 | enum conv_type conv, ullong *vec, va_list arg_ptr)
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| 219 | {
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| 220 | int indexline;
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| 221 | int indexnext;
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| 222 |
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| 223 | p = strstr(p, key);
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| 224 | if (!p) return 1;
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| 225 |
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| 226 | p += strlen(key);
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| 227 | indexline = 1;
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| 228 | indexnext = va_arg(arg_ptr, int);
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| 229 | while (1) {
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| 230 | while (*p == ' ' || *p == '\t') p++;
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| 231 | if (*p == '\n' || *p == '\0') break;
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| 232 |
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| 233 | if (indexline == indexnext) { // read this value
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| 234 | *vec++ = conv==conv_decimal ?
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| 235 | strtoull(p, NULL, 10) :
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| 236 | read_after_slash(p);
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| 237 | indexnext = va_arg(arg_ptr, int);
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| 238 | }
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| 239 | while (*p > ' ') p++; // skip over value
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| 240 | indexline++;
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| 241 | }
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| 242 | return 0;
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| 243 | }
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| 244 |
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| 245 | // Parses files with lines like "cpu0 21727 0 15718 1813856 9461 10485 0 0":
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| 246 | // rdval(file_contents, "string_to_find", result_vector, value#, value#...)
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| 247 | // value# start with 1
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| 248 | static int rdval(const char* p, const char* key, ullong *vec, ...)
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| 249 | {
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| 250 | va_list arg_ptr;
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| 251 | int result;
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| 252 |
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| 253 | va_start(arg_ptr, vec);
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| 254 | result = vrdval(p, key, conv_decimal, vec, arg_ptr);
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| 255 | va_end(arg_ptr);
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| 256 |
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| 257 | return result;
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| 258 | }
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| 259 |
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| 260 | // Parses files with lines like "... ... ... 3/148 ...."
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| 261 | static int rdval_loadavg(const char* p, ullong *vec, ...)
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| 262 | {
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| 263 | va_list arg_ptr;
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| 264 | int result;
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| 265 |
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| 266 | va_start(arg_ptr, vec);
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| 267 | result = vrdval(p, "", conv_slash, vec, arg_ptr);
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| 268 | va_end(arg_ptr);
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| 269 |
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| 270 | return result;
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| 271 | }
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| 272 |
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| 273 | // Parses /proc/diskstats
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[3232] | 274 | // 1 2 3 4 5 6(rd) 7 8 9 10(wr) 11 12 13 14
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[1765] | 275 | // 3 0 hda 51292 14441 841783 926052 25717 79650 843256 3029804 0 148459 3956933
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| 276 | // 3 1 hda1 0 0 0 0 <- ignore if only 4 fields
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[3232] | 277 | // Linux 3.0 (maybe earlier) started printing full stats for hda1 too.
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| 278 | // Had to add code which skips such devices.
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[1765] | 279 | static int rdval_diskstats(const char* p, ullong *vec)
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| 280 | {
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[3232] | 281 | char devname[32];
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| 282 | unsigned devname_len = 0;
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| 283 | int value_idx = 0;
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| 284 |
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[1765] | 285 | vec[0] = 0;
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| 286 | vec[1] = 0;
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| 287 | while (1) {
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[3232] | 288 | value_idx++;
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| 289 | while (*p == ' ' || *p == '\t')
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| 290 | p++;
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| 291 | if (*p == '\0')
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| 292 | break;
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[1765] | 293 | if (*p == '\n') {
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[3232] | 294 | value_idx = 0;
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[1765] | 295 | p++;
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| 296 | continue;
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| 297 | }
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[3232] | 298 | if (value_idx == 3) {
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| 299 | char *end = strchrnul(p, ' ');
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| 300 | /* If this a hda1-like device (same prefix as last one + digit)? */
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| 301 | if (devname_len && strncmp(devname, p, devname_len) == 0 && isdigit(p[devname_len])) {
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| 302 | p = end;
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| 303 | goto skip_line; /* skip entire line */
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| 304 | }
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| 305 | /* It is not. Remember the name for future checks */
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| 306 | devname_len = end - p;
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| 307 | if (devname_len > sizeof(devname)-1)
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| 308 | devname_len = sizeof(devname)-1;
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| 309 | strncpy(devname, p, devname_len);
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| 310 | /* devname[devname_len] = '\0'; - not really needed */
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| 311 | p = end;
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| 312 | } else
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| 313 | if (value_idx == 6) {
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| 314 | // TODO: *sectorsize (don't know how to find out sectorsize)
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| 315 | vec[0] += strtoull(p, NULL, 10);
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| 316 | } else
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| 317 | if (value_idx == 10) {
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| 318 | // TODO: *sectorsize (don't know how to find out sectorsize)
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[1765] | 319 | vec[1] += strtoull(p, NULL, 10);
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[3232] | 320 | skip_line:
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| 321 | while (*p != '\n' && *p != '\0')
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| 322 | p++;
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[1765] | 323 | continue;
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| 324 | }
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[3232] | 325 | while ((unsigned char)(*p) > ' ') // skip over value
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| 326 | p++;
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[1765] | 327 | }
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| 328 | return 0;
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| 329 | }
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| 330 |
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| 331 | static void scale(ullong ul)
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| 332 | {
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| 333 | char buf[5];
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[2725] | 334 |
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| 335 | /* see http://en.wikipedia.org/wiki/Tera */
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| 336 | smart_ulltoa4(ul, buf, " kmgtpezy");
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| 337 | buf[4] = '\0';
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[1765] | 338 | put(buf);
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| 339 | }
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| 340 |
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| 341 |
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| 342 | #define S_STAT(a) \
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| 343 | typedef struct a { \
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| 344 | struct s_stat *next; \
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[2725] | 345 | void (*collect)(struct a *s) FAST_FUNC; \
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[1765] | 346 | const char *label;
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| 347 | #define S_STAT_END(a) } a;
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| 348 |
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| 349 | S_STAT(s_stat)
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| 350 | S_STAT_END(s_stat)
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| 351 |
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[2725] | 352 | static void FAST_FUNC collect_literal(s_stat *s UNUSED_PARAM)
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[1765] | 353 | {
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| 354 | }
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| 355 |
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| 356 | static s_stat* init_literal(void)
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| 357 | {
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[2725] | 358 | s_stat *s = xzalloc(sizeof(*s));
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[1765] | 359 | s->collect = collect_literal;
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| 360 | return (s_stat*)s;
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| 361 | }
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| 362 |
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| 363 | static s_stat* init_delay(const char *param)
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| 364 | {
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[2725] | 365 | delta = strtoul(param, NULL, 0) * 1000; /* param can be "" */
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[1765] | 366 | deltanz = delta > 0 ? delta : 1;
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| 367 | need_seconds = (1000000%deltanz) != 0;
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| 368 | return NULL;
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| 369 | }
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| 370 |
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[2725] | 371 | static s_stat* init_cr(const char *param UNUSED_PARAM)
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[1765] | 372 | {
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| 373 | final_str = "\r";
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| 374 | return (s_stat*)0;
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| 375 | }
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| 376 |
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| 377 |
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| 378 | // user nice system idle iowait irq softirq (last 3 only in 2.6)
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| 379 | //cpu 649369 0 341297 4336769 11640 7122 1183
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| 380 | //cpuN 649369 0 341297 4336769 11640 7122 1183
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| 381 | enum { CPU_FIELDCNT = 7 };
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| 382 | S_STAT(cpu_stat)
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| 383 | ullong old[CPU_FIELDCNT];
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| 384 | int bar_sz;
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| 385 | char *bar;
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| 386 | S_STAT_END(cpu_stat)
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| 387 |
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| 388 |
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[2725] | 389 | static void FAST_FUNC collect_cpu(cpu_stat *s)
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[1765] | 390 | {
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| 391 | ullong data[CPU_FIELDCNT] = { 0, 0, 0, 0, 0, 0, 0 };
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| 392 | unsigned frac[CPU_FIELDCNT] = { 0, 0, 0, 0, 0, 0, 0 };
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| 393 | ullong all = 0;
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| 394 | int norm_all = 0;
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| 395 | int bar_sz = s->bar_sz;
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| 396 | char *bar = s->bar;
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| 397 | int i;
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| 398 |
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| 399 | if (rdval(get_file(&proc_stat), "cpu ", data, 1, 2, 3, 4, 5, 6, 7)) {
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| 400 | put_question_marks(bar_sz);
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| 401 | return;
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| 402 | }
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| 403 |
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| 404 | for (i = 0; i < CPU_FIELDCNT; i++) {
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| 405 | ullong old = s->old[i];
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| 406 | if (data[i] < old) old = data[i]; //sanitize
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| 407 | s->old[i] = data[i];
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| 408 | all += (data[i] -= old);
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| 409 | }
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| 410 |
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| 411 | if (all) {
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| 412 | for (i = 0; i < CPU_FIELDCNT; i++) {
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| 413 | ullong t = bar_sz * data[i];
|
---|
| 414 | norm_all += data[i] = t / all;
|
---|
| 415 | frac[i] = t % all;
|
---|
| 416 | }
|
---|
| 417 |
|
---|
| 418 | while (norm_all < bar_sz) {
|
---|
| 419 | unsigned max = frac[0];
|
---|
| 420 | int pos = 0;
|
---|
| 421 | for (i = 1; i < CPU_FIELDCNT; i++) {
|
---|
| 422 | if (frac[i] > max) max = frac[i], pos = i;
|
---|
| 423 | }
|
---|
| 424 | frac[pos] = 0; //avoid bumping up same value twice
|
---|
| 425 | data[pos]++;
|
---|
| 426 | norm_all++;
|
---|
| 427 | }
|
---|
| 428 |
|
---|
| 429 | memset(bar, '.', bar_sz);
|
---|
| 430 | memset(bar, 'S', data[2]); bar += data[2]; //sys
|
---|
| 431 | memset(bar, 'U', data[0]); bar += data[0]; //usr
|
---|
| 432 | memset(bar, 'N', data[1]); bar += data[1]; //nice
|
---|
| 433 | memset(bar, 'D', data[4]); bar += data[4]; //iowait
|
---|
| 434 | memset(bar, 'I', data[5]); bar += data[5]; //irq
|
---|
| 435 | memset(bar, 'i', data[6]); bar += data[6]; //softirq
|
---|
| 436 | } else {
|
---|
| 437 | memset(bar, '?', bar_sz);
|
---|
| 438 | }
|
---|
| 439 | put(s->bar);
|
---|
| 440 | }
|
---|
| 441 |
|
---|
| 442 |
|
---|
| 443 | static s_stat* init_cpu(const char *param)
|
---|
| 444 | {
|
---|
| 445 | int sz;
|
---|
[2725] | 446 | cpu_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 447 | s->collect = collect_cpu;
|
---|
[2725] | 448 | sz = strtoul(param, NULL, 0); /* param can be "" */
|
---|
[1765] | 449 | if (sz < 10) sz = 10;
|
---|
| 450 | if (sz > 1000) sz = 1000;
|
---|
[2725] | 451 | s->bar = xzalloc(sz+1);
|
---|
| 452 | /*s->bar[sz] = '\0'; - xzalloc did it */
|
---|
[1765] | 453 | s->bar_sz = sz;
|
---|
| 454 | return (s_stat*)s;
|
---|
| 455 | }
|
---|
| 456 |
|
---|
| 457 |
|
---|
| 458 | S_STAT(int_stat)
|
---|
| 459 | ullong old;
|
---|
| 460 | int no;
|
---|
| 461 | S_STAT_END(int_stat)
|
---|
| 462 |
|
---|
[2725] | 463 | static void FAST_FUNC collect_int(int_stat *s)
|
---|
[1765] | 464 | {
|
---|
| 465 | ullong data[1];
|
---|
| 466 | ullong old;
|
---|
| 467 |
|
---|
| 468 | if (rdval(get_file(&proc_stat), "intr", data, s->no)) {
|
---|
| 469 | put_question_marks(4);
|
---|
| 470 | return;
|
---|
| 471 | }
|
---|
| 472 |
|
---|
| 473 | old = s->old;
|
---|
| 474 | if (data[0] < old) old = data[0]; //sanitize
|
---|
| 475 | s->old = data[0];
|
---|
| 476 | scale(data[0] - old);
|
---|
| 477 | }
|
---|
| 478 |
|
---|
| 479 | static s_stat* init_int(const char *param)
|
---|
| 480 | {
|
---|
[2725] | 481 | int_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 482 | s->collect = collect_int;
|
---|
[2725] | 483 | if (param[0] == '\0') {
|
---|
[1765] | 484 | s->no = 1;
|
---|
| 485 | } else {
|
---|
[2725] | 486 | int n = xatoi_positive(param);
|
---|
| 487 | s->no = n + 2;
|
---|
[1765] | 488 | }
|
---|
| 489 | return (s_stat*)s;
|
---|
| 490 | }
|
---|
| 491 |
|
---|
| 492 |
|
---|
| 493 | S_STAT(ctx_stat)
|
---|
| 494 | ullong old;
|
---|
| 495 | S_STAT_END(ctx_stat)
|
---|
| 496 |
|
---|
[2725] | 497 | static void FAST_FUNC collect_ctx(ctx_stat *s)
|
---|
[1765] | 498 | {
|
---|
| 499 | ullong data[1];
|
---|
| 500 | ullong old;
|
---|
| 501 |
|
---|
| 502 | if (rdval(get_file(&proc_stat), "ctxt", data, 1)) {
|
---|
| 503 | put_question_marks(4);
|
---|
| 504 | return;
|
---|
| 505 | }
|
---|
| 506 |
|
---|
| 507 | old = s->old;
|
---|
| 508 | if (data[0] < old) old = data[0]; //sanitize
|
---|
| 509 | s->old = data[0];
|
---|
| 510 | scale(data[0] - old);
|
---|
| 511 | }
|
---|
| 512 |
|
---|
[2725] | 513 | static s_stat* init_ctx(const char *param UNUSED_PARAM)
|
---|
[1765] | 514 | {
|
---|
[2725] | 515 | ctx_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 516 | s->collect = collect_ctx;
|
---|
| 517 | return (s_stat*)s;
|
---|
| 518 | }
|
---|
| 519 |
|
---|
| 520 |
|
---|
| 521 | S_STAT(blk_stat)
|
---|
| 522 | const char* lookfor;
|
---|
| 523 | ullong old[2];
|
---|
| 524 | S_STAT_END(blk_stat)
|
---|
| 525 |
|
---|
[2725] | 526 | static void FAST_FUNC collect_blk(blk_stat *s)
|
---|
[1765] | 527 | {
|
---|
| 528 | ullong data[2];
|
---|
| 529 | int i;
|
---|
| 530 |
|
---|
| 531 | if (is26) {
|
---|
| 532 | i = rdval_diskstats(get_file(&proc_diskstats), data);
|
---|
| 533 | } else {
|
---|
| 534 | i = rdval(get_file(&proc_stat), s->lookfor, data, 1, 2);
|
---|
| 535 | // Linux 2.4 reports bio in Kbytes, convert to sectors:
|
---|
| 536 | data[0] *= 2;
|
---|
| 537 | data[1] *= 2;
|
---|
| 538 | }
|
---|
| 539 | if (i) {
|
---|
| 540 | put_question_marks(9);
|
---|
| 541 | return;
|
---|
| 542 | }
|
---|
| 543 |
|
---|
| 544 | for (i=0; i<2; i++) {
|
---|
| 545 | ullong old = s->old[i];
|
---|
| 546 | if (data[i] < old) old = data[i]; //sanitize
|
---|
| 547 | s->old[i] = data[i];
|
---|
| 548 | data[i] -= old;
|
---|
| 549 | }
|
---|
| 550 | scale(data[0]*512); // TODO: *sectorsize
|
---|
| 551 | put_c(' ');
|
---|
| 552 | scale(data[1]*512);
|
---|
| 553 | }
|
---|
| 554 |
|
---|
[2725] | 555 | static s_stat* init_blk(const char *param UNUSED_PARAM)
|
---|
[1765] | 556 | {
|
---|
[2725] | 557 | blk_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 558 | s->collect = collect_blk;
|
---|
| 559 | s->lookfor = "page";
|
---|
| 560 | return (s_stat*)s;
|
---|
| 561 | }
|
---|
| 562 |
|
---|
| 563 |
|
---|
| 564 | S_STAT(fork_stat)
|
---|
| 565 | ullong old;
|
---|
| 566 | S_STAT_END(fork_stat)
|
---|
| 567 |
|
---|
[2725] | 568 | static void FAST_FUNC collect_thread_nr(fork_stat *s UNUSED_PARAM)
|
---|
[1765] | 569 | {
|
---|
| 570 | ullong data[1];
|
---|
| 571 |
|
---|
| 572 | if (rdval_loadavg(get_file(&proc_loadavg), data, 4)) {
|
---|
| 573 | put_question_marks(4);
|
---|
| 574 | return;
|
---|
| 575 | }
|
---|
| 576 | scale(data[0]);
|
---|
| 577 | }
|
---|
| 578 |
|
---|
[2725] | 579 | static void FAST_FUNC collect_fork(fork_stat *s)
|
---|
[1765] | 580 | {
|
---|
| 581 | ullong data[1];
|
---|
| 582 | ullong old;
|
---|
| 583 |
|
---|
| 584 | if (rdval(get_file(&proc_stat), "processes", data, 1)) {
|
---|
| 585 | put_question_marks(4);
|
---|
| 586 | return;
|
---|
| 587 | }
|
---|
| 588 |
|
---|
| 589 | old = s->old;
|
---|
| 590 | if (data[0] < old) old = data[0]; //sanitize
|
---|
| 591 | s->old = data[0];
|
---|
| 592 | scale(data[0] - old);
|
---|
| 593 | }
|
---|
| 594 |
|
---|
| 595 | static s_stat* init_fork(const char *param)
|
---|
| 596 | {
|
---|
[2725] | 597 | fork_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 598 | if (*param == 'n') {
|
---|
| 599 | s->collect = collect_thread_nr;
|
---|
| 600 | } else {
|
---|
| 601 | s->collect = collect_fork;
|
---|
| 602 | }
|
---|
| 603 | return (s_stat*)s;
|
---|
| 604 | }
|
---|
| 605 |
|
---|
| 606 |
|
---|
| 607 | S_STAT(if_stat)
|
---|
| 608 | ullong old[4];
|
---|
| 609 | const char *device;
|
---|
| 610 | char *device_colon;
|
---|
| 611 | S_STAT_END(if_stat)
|
---|
| 612 |
|
---|
[2725] | 613 | static void FAST_FUNC collect_if(if_stat *s)
|
---|
[1765] | 614 | {
|
---|
| 615 | ullong data[4];
|
---|
| 616 | int i;
|
---|
| 617 |
|
---|
| 618 | if (rdval(get_file(&proc_net_dev), s->device_colon, data, 1, 3, 9, 11)) {
|
---|
| 619 | put_question_marks(10);
|
---|
| 620 | return;
|
---|
| 621 | }
|
---|
| 622 |
|
---|
| 623 | for (i=0; i<4; i++) {
|
---|
| 624 | ullong old = s->old[i];
|
---|
| 625 | if (data[i] < old) old = data[i]; //sanitize
|
---|
| 626 | s->old[i] = data[i];
|
---|
| 627 | data[i] -= old;
|
---|
| 628 | }
|
---|
| 629 | put_c(data[1] ? '*' : ' ');
|
---|
| 630 | scale(data[0]);
|
---|
| 631 | put_c(data[3] ? '*' : ' ');
|
---|
| 632 | scale(data[2]);
|
---|
| 633 | }
|
---|
| 634 |
|
---|
| 635 | static s_stat* init_if(const char *device)
|
---|
| 636 | {
|
---|
[2725] | 637 | if_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 638 |
|
---|
| 639 | if (!device || !device[0])
|
---|
| 640 | bb_show_usage();
|
---|
| 641 | s->collect = collect_if;
|
---|
| 642 |
|
---|
| 643 | s->device = device;
|
---|
[2725] | 644 | s->device_colon = xasprintf("%s:", device);
|
---|
[1765] | 645 | return (s_stat*)s;
|
---|
| 646 | }
|
---|
| 647 |
|
---|
| 648 |
|
---|
| 649 | S_STAT(mem_stat)
|
---|
| 650 | char opt;
|
---|
| 651 | S_STAT_END(mem_stat)
|
---|
| 652 |
|
---|
| 653 | // "Memory" value should not include any caches.
|
---|
| 654 | // IOW: neither "ls -laR /" nor heavy read/write activity
|
---|
| 655 | // should affect it. We'd like to also include any
|
---|
| 656 | // long-term allocated kernel-side mem, but it is hard
|
---|
| 657 | // to figure out. For now, bufs, cached & slab are
|
---|
| 658 | // counted as "free" memory
|
---|
| 659 | //2.6.16:
|
---|
| 660 | //MemTotal: 773280 kB
|
---|
| 661 | //MemFree: 25912 kB - genuinely free
|
---|
| 662 | //Buffers: 320672 kB - cache
|
---|
| 663 | //Cached: 146396 kB - cache
|
---|
| 664 | //SwapCached: 0 kB
|
---|
| 665 | //Active: 183064 kB
|
---|
| 666 | //Inactive: 356892 kB
|
---|
| 667 | //HighTotal: 0 kB
|
---|
| 668 | //HighFree: 0 kB
|
---|
| 669 | //LowTotal: 773280 kB
|
---|
| 670 | //LowFree: 25912 kB
|
---|
| 671 | //SwapTotal: 131064 kB
|
---|
| 672 | //SwapFree: 131064 kB
|
---|
| 673 | //Dirty: 48 kB
|
---|
| 674 | //Writeback: 0 kB
|
---|
| 675 | //Mapped: 96620 kB
|
---|
| 676 | //Slab: 200668 kB - takes 7 Mb on my box fresh after boot,
|
---|
| 677 | // but includes dentries and inodes
|
---|
| 678 | // (== can take arbitrary amount of mem)
|
---|
| 679 | //CommitLimit: 517704 kB
|
---|
| 680 | //Committed_AS: 236776 kB
|
---|
| 681 | //PageTables: 1248 kB
|
---|
| 682 | //VmallocTotal: 516052 kB
|
---|
| 683 | //VmallocUsed: 3852 kB
|
---|
| 684 | //VmallocChunk: 512096 kB
|
---|
| 685 | //HugePages_Total: 0
|
---|
| 686 | //HugePages_Free: 0
|
---|
| 687 | //Hugepagesize: 4096 kB
|
---|
[2725] | 688 | static void FAST_FUNC collect_mem(mem_stat *s)
|
---|
[1765] | 689 | {
|
---|
| 690 | ullong m_total = 0;
|
---|
| 691 | ullong m_free = 0;
|
---|
| 692 | ullong m_bufs = 0;
|
---|
| 693 | ullong m_cached = 0;
|
---|
| 694 | ullong m_slab = 0;
|
---|
| 695 |
|
---|
| 696 | if (rdval(get_file(&proc_meminfo), "MemTotal:", &m_total, 1)) {
|
---|
| 697 | put_question_marks(4);
|
---|
| 698 | return;
|
---|
| 699 | }
|
---|
[2725] | 700 | if (s->opt == 't') {
|
---|
[1765] | 701 | scale(m_total << 10);
|
---|
| 702 | return;
|
---|
| 703 | }
|
---|
| 704 |
|
---|
| 705 | if (rdval(proc_meminfo.file, "MemFree:", &m_free , 1)
|
---|
| 706 | || rdval(proc_meminfo.file, "Buffers:", &m_bufs , 1)
|
---|
| 707 | || rdval(proc_meminfo.file, "Cached:", &m_cached, 1)
|
---|
| 708 | || rdval(proc_meminfo.file, "Slab:", &m_slab , 1)
|
---|
| 709 | ) {
|
---|
| 710 | put_question_marks(4);
|
---|
| 711 | return;
|
---|
| 712 | }
|
---|
| 713 |
|
---|
| 714 | m_free += m_bufs + m_cached + m_slab;
|
---|
| 715 | switch (s->opt) {
|
---|
| 716 | case 'f':
|
---|
| 717 | scale(m_free << 10); break;
|
---|
| 718 | default:
|
---|
| 719 | scale((m_total - m_free) << 10); break;
|
---|
| 720 | }
|
---|
| 721 | }
|
---|
| 722 |
|
---|
| 723 | static s_stat* init_mem(const char *param)
|
---|
| 724 | {
|
---|
[2725] | 725 | mem_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 726 | s->collect = collect_mem;
|
---|
| 727 | s->opt = param[0];
|
---|
| 728 | return (s_stat*)s;
|
---|
| 729 | }
|
---|
| 730 |
|
---|
| 731 |
|
---|
| 732 | S_STAT(swp_stat)
|
---|
| 733 | S_STAT_END(swp_stat)
|
---|
| 734 |
|
---|
[2725] | 735 | static void FAST_FUNC collect_swp(swp_stat *s UNUSED_PARAM)
|
---|
[1765] | 736 | {
|
---|
| 737 | ullong s_total[1];
|
---|
| 738 | ullong s_free[1];
|
---|
| 739 | if (rdval(get_file(&proc_meminfo), "SwapTotal:", s_total, 1)
|
---|
| 740 | || rdval(proc_meminfo.file, "SwapFree:" , s_free, 1)
|
---|
| 741 | ) {
|
---|
| 742 | put_question_marks(4);
|
---|
| 743 | return;
|
---|
| 744 | }
|
---|
| 745 | scale((s_total[0]-s_free[0]) << 10);
|
---|
| 746 | }
|
---|
| 747 |
|
---|
[2725] | 748 | static s_stat* init_swp(const char *param UNUSED_PARAM)
|
---|
[1765] | 749 | {
|
---|
[2725] | 750 | swp_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 751 | s->collect = collect_swp;
|
---|
| 752 | return (s_stat*)s;
|
---|
| 753 | }
|
---|
| 754 |
|
---|
| 755 |
|
---|
| 756 | S_STAT(fd_stat)
|
---|
| 757 | S_STAT_END(fd_stat)
|
---|
| 758 |
|
---|
[2725] | 759 | static void FAST_FUNC collect_fd(fd_stat *s UNUSED_PARAM)
|
---|
[1765] | 760 | {
|
---|
| 761 | ullong data[2];
|
---|
| 762 |
|
---|
| 763 | if (rdval(get_file(&proc_sys_fs_filenr), "", data, 1, 2)) {
|
---|
| 764 | put_question_marks(4);
|
---|
| 765 | return;
|
---|
| 766 | }
|
---|
| 767 |
|
---|
| 768 | scale(data[0] - data[1]);
|
---|
| 769 | }
|
---|
| 770 |
|
---|
[2725] | 771 | static s_stat* init_fd(const char *param UNUSED_PARAM)
|
---|
[1765] | 772 | {
|
---|
[2725] | 773 | fd_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 774 | s->collect = collect_fd;
|
---|
| 775 | return (s_stat*)s;
|
---|
| 776 | }
|
---|
| 777 |
|
---|
| 778 |
|
---|
| 779 | S_STAT(time_stat)
|
---|
| 780 | int prec;
|
---|
| 781 | int scale;
|
---|
| 782 | S_STAT_END(time_stat)
|
---|
| 783 |
|
---|
[2725] | 784 | static void FAST_FUNC collect_time(time_stat *s)
|
---|
[1765] | 785 | {
|
---|
| 786 | char buf[sizeof("12:34:56.123456")];
|
---|
| 787 | struct tm* tm;
|
---|
| 788 | int us = tv.tv_usec + s->scale/2;
|
---|
| 789 | time_t t = tv.tv_sec;
|
---|
| 790 |
|
---|
| 791 | if (us >= 1000000) {
|
---|
| 792 | t++;
|
---|
| 793 | us -= 1000000;
|
---|
| 794 | }
|
---|
| 795 | tm = localtime(&t);
|
---|
| 796 |
|
---|
| 797 | sprintf(buf, "%02d:%02d:%02d", tm->tm_hour, tm->tm_min, tm->tm_sec);
|
---|
| 798 | if (s->prec)
|
---|
| 799 | sprintf(buf+8, ".%0*d", s->prec, us / s->scale);
|
---|
| 800 | put(buf);
|
---|
| 801 | }
|
---|
| 802 |
|
---|
| 803 | static s_stat* init_time(const char *param)
|
---|
| 804 | {
|
---|
| 805 | int prec;
|
---|
[2725] | 806 | time_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 807 |
|
---|
| 808 | s->collect = collect_time;
|
---|
[2725] | 809 | prec = param[0] - '0';
|
---|
[1765] | 810 | if (prec < 0) prec = 0;
|
---|
| 811 | else if (prec > 6) prec = 6;
|
---|
| 812 | s->prec = prec;
|
---|
| 813 | s->scale = 1;
|
---|
| 814 | while (prec++ < 6)
|
---|
| 815 | s->scale *= 10;
|
---|
| 816 | return (s_stat*)s;
|
---|
| 817 | }
|
---|
| 818 |
|
---|
[2725] | 819 | static void FAST_FUNC collect_info(s_stat *s)
|
---|
[1765] | 820 | {
|
---|
| 821 | gen ^= 1;
|
---|
| 822 | while (s) {
|
---|
| 823 | put(s->label);
|
---|
| 824 | s->collect(s);
|
---|
| 825 | s = s->next;
|
---|
| 826 | }
|
---|
| 827 | }
|
---|
| 828 |
|
---|
| 829 |
|
---|
| 830 | typedef s_stat* init_func(const char *param);
|
---|
| 831 |
|
---|
[3232] | 832 | // Deprecated %NNNd is to be removed, -d MSEC supersedes it
|
---|
[1765] | 833 | static const char options[] ALIGN1 = "ncmsfixptbdr";
|
---|
| 834 | static init_func *const init_functions[] = {
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| 835 | init_if,
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| 836 | init_cpu,
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| 837 | init_mem,
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| 838 | init_swp,
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| 839 | init_fd,
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| 840 | init_int,
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| 841 | init_ctx,
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| 842 | init_fork,
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| 843 | init_time,
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| 844 | init_blk,
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| 845 | init_delay,
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| 846 | init_cr
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| 847 | };
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| 848 |
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[2725] | 849 | int nmeter_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 850 | int nmeter_main(int argc UNUSED_PARAM, char **argv)
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[1765] | 851 | {
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| 852 | char buf[32];
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| 853 | s_stat *first = NULL;
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| 854 | s_stat *last = NULL;
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| 855 | s_stat *s;
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[3232] | 856 | char *opt_d;
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[1765] | 857 | char *cur, *prev;
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| 858 |
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| 859 | INIT_G();
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| 860 |
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| 861 | xchdir("/proc");
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| 862 |
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[2725] | 863 | if (open_read_close("version", buf, sizeof(buf)-1) > 0) {
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| 864 | buf[sizeof(buf)-1] = '\0';
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| 865 | is26 = (strstr(buf, " 2.4.") == NULL);
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| 866 | }
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[1765] | 867 |
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[3232] | 868 | if (getopt32(argv, "d:", &opt_d))
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| 869 | init_delay(opt_d);
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| 870 | argv += optind;
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| 871 |
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| 872 | if (!argv[0])
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| 873 | bb_show_usage();
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| 874 |
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| 875 | // Can use argv[0] directly, but this will mess up
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[1765] | 876 | // parameters as seen by e.g. ps. Making a copy...
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[3232] | 877 | cur = xstrdup(argv[0]);
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[1765] | 878 | while (1) {
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| 879 | char *param, *p;
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| 880 | prev = cur;
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| 881 | again:
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| 882 | cur = strchr(cur, '%');
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| 883 | if (!cur)
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| 884 | break;
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| 885 | if (cur[1] == '%') { // %%
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[2725] | 886 | overlapping_strcpy(cur, cur + 1);
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[1765] | 887 | cur++;
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| 888 | goto again;
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| 889 | }
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| 890 | *cur++ = '\0'; // overwrite %
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| 891 | if (cur[0] == '[') {
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| 892 | // format: %[foptstring]
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| 893 | cur++;
|
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| 894 | p = strchr(options, cur[0]);
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| 895 | param = cur+1;
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---|
| 896 | while (cur[0] != ']') {
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| 897 | if (!cur[0])
|
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| 898 | bb_show_usage();
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| 899 | cur++;
|
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| 900 | }
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| 901 | *cur++ = '\0'; // overwrite [
|
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| 902 | } else {
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| 903 | // format: %NNNNNNf
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| 904 | param = cur;
|
---|
| 905 | while (cur[0] >= '0' && cur[0] <= '9')
|
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| 906 | cur++;
|
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| 907 | if (!cur[0])
|
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| 908 | bb_show_usage();
|
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| 909 | p = strchr(options, cur[0]);
|
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| 910 | *cur++ = '\0'; // overwrite format char
|
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| 911 | }
|
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| 912 | if (!p)
|
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| 913 | bb_show_usage();
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| 914 | s = init_functions[p-options](param);
|
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| 915 | if (s) {
|
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| 916 | s->label = prev;
|
---|
[2725] | 917 | /*s->next = NULL; - all initXXX funcs use xzalloc */
|
---|
[1765] | 918 | if (!first)
|
---|
| 919 | first = s;
|
---|
| 920 | else
|
---|
| 921 | last->next = s;
|
---|
| 922 | last = s;
|
---|
| 923 | } else {
|
---|
| 924 | // %NNNNd or %r option. remove it from string
|
---|
| 925 | strcpy(prev + strlen(prev), cur);
|
---|
| 926 | cur = prev;
|
---|
| 927 | }
|
---|
| 928 | }
|
---|
| 929 | if (prev[0]) {
|
---|
| 930 | s = init_literal();
|
---|
| 931 | s->label = prev;
|
---|
[2725] | 932 | /*s->next = NULL; - all initXXX funcs use xzalloc */
|
---|
[1765] | 933 | if (!first)
|
---|
| 934 | first = s;
|
---|
| 935 | else
|
---|
| 936 | last->next = s;
|
---|
| 937 | last = s;
|
---|
| 938 | }
|
---|
| 939 |
|
---|
| 940 | // Generate first samples but do not print them, they're bogus
|
---|
| 941 | collect_info(first);
|
---|
| 942 | reset_outbuf();
|
---|
| 943 | if (delta >= 0) {
|
---|
| 944 | gettimeofday(&tv, NULL);
|
---|
| 945 | usleep(delta > 1000000 ? 1000000 : delta - tv.tv_usec%deltanz);
|
---|
| 946 | }
|
---|
| 947 |
|
---|
| 948 | while (1) {
|
---|
| 949 | gettimeofday(&tv, NULL);
|
---|
| 950 | collect_info(first);
|
---|
| 951 | put(final_str);
|
---|
| 952 | print_outbuf();
|
---|
| 953 |
|
---|
| 954 | // Negative delta -> no usleep at all
|
---|
| 955 | // This will hog the CPU but you can have REALLY GOOD
|
---|
| 956 | // time resolution ;)
|
---|
| 957 | // TODO: detect and avoid useless updates
|
---|
| 958 | // (like: nothing happens except time)
|
---|
| 959 | if (delta >= 0) {
|
---|
| 960 | int rem;
|
---|
| 961 | // can be commented out, will sacrifice sleep time precision a bit
|
---|
| 962 | gettimeofday(&tv, NULL);
|
---|
| 963 | if (need_seconds)
|
---|
| 964 | rem = delta - ((ullong)tv.tv_sec*1000000 + tv.tv_usec) % deltanz;
|
---|
| 965 | else
|
---|
| 966 | rem = delta - tv.tv_usec%deltanz;
|
---|
| 967 | // Sometimes kernel wakes us up just a tiny bit earlier than asked
|
---|
| 968 | // Do not go to very short sleep in this case
|
---|
| 969 | if (rem < delta/128) {
|
---|
| 970 | rem += delta;
|
---|
| 971 | }
|
---|
| 972 | usleep(rem);
|
---|
| 973 | }
|
---|
| 974 | }
|
---|
| 975 |
|
---|
| 976 | /*return 0;*/
|
---|
| 977 | }
|
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