/*
-** Licensed under the GPL v2, see the file LICENSE in this tarball
-**
-** Based on nanotop.c from floppyfw project
-**
-** Contact me: vda.linux@googlemail.com */
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ *
+ * Based on nanotop.c from floppyfw project
+ *
+ * Contact me: vda.linux@googlemail.com
+ */
+//config:config NMETER
+//config: bool "nmeter (10 kb)"
+//config: default y
+//config: help
+//config: Prints selected system stats continuously, one line per update.
+
+//applet:IF_NMETER(APPLET(nmeter, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_NMETER) += nmeter.o
+
+//usage:#define nmeter_trivial_usage
+//usage: "[-d MSEC] FORMAT_STRING"
+//usage:#define nmeter_full_usage "\n\n"
+//usage: "Monitor system in real time"
+//usage: "\n"
+//usage: "\n -d MSEC Milliseconds between updates, default:1000, none:-1"
+//usage: "\n"
+//usage: "\nFormat specifiers:"
+//usage: "\n %Nc or %[cN] CPU. N - bar size (default 10)"
+//usage: "\n (displays: S:system U:user N:niced D:iowait I:irq i:softirq)"
+//usage: "\n %[nINTERFACE] Network INTERFACE"
+//usage: "\n %m Allocated memory"
+//usage: "\n %[mf] Free memory"
+//usage: "\n %[mt] Total memory"
+//usage: "\n %s Allocated swap"
+//usage: "\n %f Number of used file descriptors"
+//usage: "\n %Ni Total/specific IRQ rate"
+//usage: "\n %x Context switch rate"
+//usage: "\n %p Forks"
+//usage: "\n %[pn] # of processes"
+//usage: "\n %b Block io"
+//usage: "\n %Nt Time (with N decimal points)"
+//usage: "\n %r Print <cr> instead of <lf> at EOL"
//TODO:
// simplify code
// totalram=2107416576, freeram=211525632, sharedram=0, bufferram=157204480}
// totalswap=134209536, freeswap=134209536, procs=157})
-#include <time.h>
#include "libbb.h"
+#include "common_bufsiz.h"
typedef unsigned long long ullong;
-enum { PROC_FILE_SIZE = 4096 };
+enum { /* Preferably use powers of 2 */
+ PROC_MIN_FILE_SIZE = 256,
+ PROC_MAX_FILE_SIZE = 16 * 1024,
+};
typedef struct proc_file {
char *file;
- //const char *name;
+ int file_sz;
smallint last_gen;
} proc_file;
smallint is26;
// 1 if sample delay is not an integer fraction of a second
smallint need_seconds;
+ char final_char;
char *cur_outbuf;
- const char *final_str;
int delta;
- int deltanz;
+ unsigned deltanz;
struct timeval tv;
#define first_proc_file proc_stat
proc_file proc_stat; // Must match the order of proc_name's!
#define is26 (G.is26 )
#define need_seconds (G.need_seconds )
#define cur_outbuf (G.cur_outbuf )
-#define final_str (G.final_str )
-#define delta (G.delta )
-#define deltanz (G.deltanz )
#define tv (G.tv )
#define proc_stat (G.proc_stat )
#define proc_loadavg (G.proc_loadavg )
#define proc_meminfo (G.proc_meminfo )
#define proc_diskstats (G.proc_diskstats )
#define proc_sys_fs_filenr (G.proc_sys_fs_filenr)
-#define INIT_G() do { \
- PTR_TO_GLOBALS = xzalloc(sizeof(G)); \
- cur_outbuf = outbuf; \
- final_str = "\n"; \
- deltanz = delta = 1000000; \
- } while (0)
-
-// We depend on this being a char[], not char* - we take sizeof() of it
#define outbuf bb_common_bufsiz1
+#define INIT_G() do { \
+ setup_common_bufsiz(); \
+ SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
+ cur_outbuf = outbuf; \
+ G.final_char = '\n'; \
+ G.deltanz = G.delta = 1000000; \
+} while (0)
static inline void reset_outbuf(void)
{
{
int sz = cur_outbuf - outbuf;
if (sz > 0) {
- xwrite(1, outbuf, sz);
+ xwrite(STDOUT_FILENO, outbuf, sz);
cur_outbuf = outbuf;
}
}
static void put(const char *s)
{
- int sz = strlen(s);
- if (sz > outbuf + sizeof(outbuf) - cur_outbuf)
- sz = outbuf + sizeof(outbuf) - cur_outbuf;
- memcpy(cur_outbuf, s, sz);
- cur_outbuf += sz;
+ char *p = cur_outbuf;
+ int sz = outbuf + COMMON_BUFSIZE - p;
+ while (*s && --sz >= 0)
+ *p++ = *s++;
+ cur_outbuf = p;
}
static void put_c(char c)
{
- if (cur_outbuf < outbuf + sizeof(outbuf))
+ if (cur_outbuf < outbuf + COMMON_BUFSIZE)
*cur_outbuf++ = c;
}
put_c('?');
}
-static void readfile_z(char *buf, int sz, const char* fname)
+static void readfile_z(proc_file *pf, const char* fname)
{
// open_read_close() will do two reads in order to be sure we are at EOF,
// and we don't need/want that.
-// sz = open_read_close(fname, buf, sz-1);
-
- int fd = xopen(fname, O_RDONLY);
+ int fd;
+ int sz, rdsz;
+ char *buf;
+
+ sz = pf->file_sz;
+ buf = pf->file;
+ if (!buf) {
+ buf = xmalloc(PROC_MIN_FILE_SIZE);
+ sz = PROC_MIN_FILE_SIZE;
+ }
+ again:
+ fd = xopen(fname, O_RDONLY);
buf[0] = '\0';
- if (fd >= 0) {
- sz = read(fd, buf, sz-1);
- if (sz > 0) buf[sz] = '\0';
- close(fd);
+ rdsz = read(fd, buf, sz-1);
+ close(fd);
+ if (rdsz > 0) {
+ if (rdsz == sz-1 && sz < PROC_MAX_FILE_SIZE) {
+ sz *= 2;
+ buf = xrealloc(buf, sz);
+ goto again;
+ }
+ buf[rdsz] = '\0';
}
+ pf->file_sz = sz;
+ pf->file = buf;
}
static const char* get_file(proc_file *pf)
{
if (pf->last_gen != gen) {
pf->last_gen = gen;
- // We allocate PROC_FILE_SIZE bytes. This wastes memory,
- // but allows us to allocate only once (at first sample)
- // per proc file, and reuse buffer for each sample
- if (!pf->file)
- pf->file = xmalloc(PROC_FILE_SIZE);
- readfile_z(pf->file, PROC_FILE_SIZE, proc_name[pf - &first_proc_file]);
+ readfile_z(pf, proc_name[pf - &first_proc_file]);
}
return pf->file;
}
-static inline ullong read_after_slash(const char *p)
+static ullong read_after_slash(const char *p)
{
p = strchr(p, '/');
if (!p) return 0;
return strtoull(p+1, NULL, 10);
}
-enum conv_type { conv_decimal, conv_slash };
+enum conv_type {
+ conv_decimal = 0,
+ conv_slash = 1
+};
// Reads decimal values from line. Values start after key, for example:
// "cpu 649369 0 341297 4336769..." - key is "cpu" here.
-// Values are stored in vec[]. arg_ptr has list of positions
-// we are interested in: for example: 1,2,5 - we want 1st, 2nd and 5th value.
-static int vrdval(const char* p, const char* key,
- enum conv_type conv, ullong *vec, va_list arg_ptr)
+// Values are stored in vec[].
+// posbits is a bit lit of positions we are interested in.
+// for example: 00100110 - we want 1st, 2nd and 5th value.
+// posbits.bit0 encodes conversion type.
+static int rdval(const char* p, const char* key, ullong *vec, long posbits)
{
- int indexline;
- int indexnext;
+ unsigned curpos;
p = strstr(p, key);
if (!p) return 1;
p += strlen(key);
- indexline = 1;
- indexnext = va_arg(arg_ptr, int);
+ curpos = 1 << 1;
while (1) {
while (*p == ' ' || *p == '\t') p++;
if (*p == '\n' || *p == '\0') break;
- if (indexline == indexnext) { // read this value
- *vec++ = conv==conv_decimal ?
+ if (curpos & posbits) { // read this value
+ *vec++ = (posbits & 1) == conv_decimal ?
strtoull(p, NULL, 10) :
read_after_slash(p);
- indexnext = va_arg(arg_ptr, int);
+ posbits -= curpos;
+ if (posbits <= 1)
+ return 0;
}
- while (*p > ' ') p++; // skip over value
- indexline++;
+ while (*p > ' ') // skip over the value
+ p++;
+ curpos <<= 1;
}
return 0;
}
-// Parses files with lines like "cpu0 21727 0 15718 1813856 9461 10485 0 0":
-// rdval(file_contents, "string_to_find", result_vector, value#, value#...)
-// value# start with 1
-static int rdval(const char* p, const char* key, ullong *vec, ...)
-{
- va_list arg_ptr;
- int result;
-
- va_start(arg_ptr, vec);
- result = vrdval(p, key, conv_decimal, vec, arg_ptr);
- va_end(arg_ptr);
-
- return result;
-}
-
// Parses files with lines like "... ... ... 3/148 ...."
-static int rdval_loadavg(const char* p, ullong *vec, ...)
+static int rdval_loadavg(const char* p, ullong *vec, long posbits)
{
- va_list arg_ptr;
int result;
-
- va_start(arg_ptr, vec);
- result = vrdval(p, "", conv_slash, vec, arg_ptr);
- va_end(arg_ptr);
-
+ result = rdval(p, "", vec, posbits | conv_slash);
return result;
}
// Parses /proc/diskstats
-// 1 2 3 4 5 6(rd) 7 8 9 10(wr) 11 12 13 14
+// 1 2 3 4 5 6(rd) 7 8 9 10(wr) 11 12 13 14
// 3 0 hda 51292 14441 841783 926052 25717 79650 843256 3029804 0 148459 3956933
// 3 1 hda1 0 0 0 0 <- ignore if only 4 fields
+// Linux 3.0 (maybe earlier) started printing full stats for hda1 too.
+// Had to add code which skips such devices.
static int rdval_diskstats(const char* p, ullong *vec)
{
- ullong rd = 0; // to avoid "warning: 'rd' might be used uninitialized"
- int indexline = 0;
+ char devname[32];
+ unsigned devname_len = 0;
+ int value_idx = 0;
+
vec[0] = 0;
vec[1] = 0;
while (1) {
- indexline++;
- while (*p == ' ' || *p == '\t') p++;
- if (*p == '\0') break;
+ value_idx++;
+ while (*p == ' ' || *p == '\t')
+ p++;
+ if (*p == '\0')
+ break;
if (*p == '\n') {
- indexline = 0;
+ value_idx = 0;
p++;
continue;
}
- if (indexline == 6) {
- rd = strtoull(p, NULL, 10);
- } else if (indexline == 10) {
- vec[0] += rd; // TODO: *sectorsize (don't know how to find out sectorsize)
+ if (value_idx == 3) {
+ char *end = strchrnul(p, ' ');
+ /* If this a hda1-like device (same prefix as last one + digit)? */
+ if (devname_len && strncmp(devname, p, devname_len) == 0 && isdigit(p[devname_len])) {
+ p = end;
+ goto skip_line; /* skip entire line */
+ }
+ /* It is not. Remember the name for future checks */
+ devname_len = end - p;
+ if (devname_len > sizeof(devname)-1)
+ devname_len = sizeof(devname)-1;
+ strncpy(devname, p, devname_len);
+ /* devname[devname_len] = '\0'; - not really needed */
+ p = end;
+ } else
+ if (value_idx == 6) {
+ // TODO: *sectorsize (don't know how to find out sectorsize)
+ vec[0] += strtoull(p, NULL, 10);
+ } else
+ if (value_idx == 10) {
+ // TODO: *sectorsize (don't know how to find out sectorsize)
vec[1] += strtoull(p, NULL, 10);
- while (*p != '\n' && *p != '\0') p++;
+ skip_line:
+ while (*p != '\n' && *p != '\0')
+ p++;
continue;
}
- while (*p > ' ') p++; // skip over value
+ while ((unsigned char)(*p) > ' ') // skip over value
+ p++;
}
return 0;
}
static void scale(ullong ul)
{
char buf[5];
- smart_ulltoa5(ul, buf);
+
+ /* see http://en.wikipedia.org/wiki/Tera */
+ smart_ulltoa4(ul, buf, " kmgtpezy")[0] = '\0';
put(buf);
}
-
#define S_STAT(a) \
typedef struct a { \
struct s_stat *next; \
- void (*collect)(struct a *s); \
+ void (*collect)(struct a *s) FAST_FUNC; \
const char *label;
#define S_STAT_END(a) } a;
S_STAT(s_stat)
S_STAT_END(s_stat)
-static void collect_literal(s_stat *s)
+static void FAST_FUNC collect_literal(s_stat *s UNUSED_PARAM)
{
}
static s_stat* init_literal(void)
{
- s_stat *s = xmalloc(sizeof(s_stat));
+ s_stat *s = xzalloc(sizeof(*s));
s->collect = collect_literal;
return (s_stat*)s;
}
-static s_stat* init_delay(const char *param)
+static s_stat* init_cr(const char *param UNUSED_PARAM)
{
- delta = bb_strtoi(param, NULL, 0) * 1000;
- deltanz = delta > 0 ? delta : 1;
- need_seconds = (1000000%deltanz) != 0;
+ G.final_char = '\r';
return NULL;
}
-static s_stat* init_cr(const char *param)
-{
- final_str = "\r";
- return (s_stat*)0;
-}
-
-
// user nice system idle iowait irq softirq (last 3 only in 2.6)
//cpu 649369 0 341297 4336769 11640 7122 1183
//cpuN 649369 0 341297 4336769 11640 7122 1183
S_STAT(cpu_stat)
ullong old[CPU_FIELDCNT];
int bar_sz;
- char *bar;
+ char bar[1];
S_STAT_END(cpu_stat)
-
-static void collect_cpu(cpu_stat *s)
+static void FAST_FUNC collect_cpu(cpu_stat *s)
{
ullong data[CPU_FIELDCNT] = { 0, 0, 0, 0, 0, 0, 0 };
unsigned frac[CPU_FIELDCNT] = { 0, 0, 0, 0, 0, 0, 0 };
char *bar = s->bar;
int i;
- if (rdval(get_file(&proc_stat), "cpu ", data, 1, 2, 3, 4, 5, 6, 7)) {
+ if (rdval(get_file(&proc_stat), "cpu ", data, 0
+ | (1 << 1)
+ | (1 << 2)
+ | (1 << 3)
+ | (1 << 4)
+ | (1 << 5)
+ | (1 << 6)
+ | (1 << 7))
+ ) {
put_question_marks(bar_sz);
return;
}
put(s->bar);
}
-
static s_stat* init_cpu(const char *param)
{
int sz;
- cpu_stat *s = xmalloc(sizeof(cpu_stat));
- s->collect = collect_cpu;
- sz = strtol(param, NULL, 0);
+ cpu_stat *s;
+ sz = strtoul(param, NULL, 0); /* param can be "" */
if (sz < 10) sz = 10;
if (sz > 1000) sz = 1000;
- s->bar = xmalloc(sz+1);
- s->bar[sz] = '\0';
+ s = xzalloc(sizeof(*s) + sz);
+ /*s->bar[sz] = '\0'; - xzalloc did it */
s->bar_sz = sz;
+ s->collect = collect_cpu;
return (s_stat*)s;
}
-
S_STAT(int_stat)
ullong old;
int no;
S_STAT_END(int_stat)
-static void collect_int(int_stat *s)
+static void FAST_FUNC collect_int(int_stat *s)
{
ullong data[1];
ullong old;
- if (rdval(get_file(&proc_stat), "intr", data, s->no)) {
+ if (rdval(get_file(&proc_stat), "intr", data, 1 << s->no)) {
put_question_marks(4);
return;
}
static s_stat* init_int(const char *param)
{
- int_stat *s = xmalloc(sizeof(int_stat));
+ int_stat *s = xzalloc(sizeof(*s));
s->collect = collect_int;
- if (param[0]=='\0') {
+ if (param[0] == '\0') {
s->no = 1;
} else {
- int n = strtoul(param, NULL, 0);
- s->no = n+2;
+ int n = xatoi_positive(param);
+ s->no = n + 2;
}
return (s_stat*)s;
}
-
S_STAT(ctx_stat)
ullong old;
S_STAT_END(ctx_stat)
-static void collect_ctx(ctx_stat *s)
+static void FAST_FUNC collect_ctx(ctx_stat *s)
{
ullong data[1];
ullong old;
- if (rdval(get_file(&proc_stat), "ctxt", data, 1)) {
+ if (rdval(get_file(&proc_stat), "ctxt", data, 1 << 1)) {
put_question_marks(4);
return;
}
scale(data[0] - old);
}
-static s_stat* init_ctx(const char *param)
+static s_stat* init_ctx(const char *param UNUSED_PARAM)
{
- ctx_stat *s = xmalloc(sizeof(ctx_stat));
+ ctx_stat *s = xzalloc(sizeof(*s));
s->collect = collect_ctx;
return (s_stat*)s;
}
-
S_STAT(blk_stat)
const char* lookfor;
ullong old[2];
S_STAT_END(blk_stat)
-static void collect_blk(blk_stat *s)
+static void FAST_FUNC collect_blk(blk_stat *s)
{
ullong data[2];
int i;
if (is26) {
i = rdval_diskstats(get_file(&proc_diskstats), data);
} else {
- i = rdval(get_file(&proc_stat), s->lookfor, data, 1, 2);
+ i = rdval(get_file(&proc_stat), s->lookfor, data, 0
+ | (1 << 1)
+ | (1 << 2)
+ );
// Linux 2.4 reports bio in Kbytes, convert to sectors:
data[0] *= 2;
data[1] *= 2;
scale(data[1]*512);
}
-static s_stat* init_blk(const char *param)
+static s_stat* init_blk(const char *param UNUSED_PARAM)
{
- blk_stat *s = xmalloc(sizeof(blk_stat));
+ blk_stat *s = xzalloc(sizeof(*s));
s->collect = collect_blk;
s->lookfor = "page";
return (s_stat*)s;
}
-
S_STAT(fork_stat)
ullong old;
S_STAT_END(fork_stat)
-static void collect_thread_nr(fork_stat *s)
+static void FAST_FUNC collect_thread_nr(fork_stat *s UNUSED_PARAM)
{
ullong data[1];
- if (rdval_loadavg(get_file(&proc_loadavg), data, 4)) {
+ if (rdval_loadavg(get_file(&proc_loadavg), data, 1 << 4)) {
put_question_marks(4);
return;
}
scale(data[0]);
}
-static void collect_fork(fork_stat *s)
+static void FAST_FUNC collect_fork(fork_stat *s)
{
ullong data[1];
ullong old;
- if (rdval(get_file(&proc_stat), "processes", data, 1)) {
+ if (rdval(get_file(&proc_stat), "processes", data, 1 << 1)) {
put_question_marks(4);
return;
}
static s_stat* init_fork(const char *param)
{
- fork_stat *s = xmalloc(sizeof(fork_stat));
+ fork_stat *s = xzalloc(sizeof(*s));
if (*param == 'n') {
s->collect = collect_thread_nr;
} else {
return (s_stat*)s;
}
-
S_STAT(if_stat)
ullong old[4];
const char *device;
char *device_colon;
S_STAT_END(if_stat)
-static void collect_if(if_stat *s)
+static void FAST_FUNC collect_if(if_stat *s)
{
ullong data[4];
int i;
- if (rdval(get_file(&proc_net_dev), s->device_colon, data, 1, 3, 9, 11)) {
+ if (rdval(get_file(&proc_net_dev), s->device_colon, data, 0
+ | (1 << 1)
+ | (1 << 3)
+ | (1 << 9)
+ | (1 << 11))
+ ) {
put_question_marks(10);
return;
}
static s_stat* init_if(const char *device)
{
- if_stat *s = xmalloc(sizeof(if_stat));
+ if_stat *s = xzalloc(sizeof(*s));
if (!device || !device[0])
bb_show_usage();
s->collect = collect_if;
s->device = device;
- s->device_colon = xmalloc(strlen(device)+2);
- strcpy(s->device_colon, device);
- strcat(s->device_colon, ":");
+ s->device_colon = xasprintf("%s:", device);
return (s_stat*)s;
}
-
S_STAT(mem_stat)
char opt;
S_STAT_END(mem_stat)
//HugePages_Total: 0
//HugePages_Free: 0
//Hugepagesize: 4096 kB
-static void collect_mem(mem_stat *s)
+static void FAST_FUNC collect_mem(mem_stat *s)
{
ullong m_total = 0;
ullong m_free = 0;
ullong m_cached = 0;
ullong m_slab = 0;
- if (rdval(get_file(&proc_meminfo), "MemTotal:", &m_total, 1)) {
+ if (rdval(get_file(&proc_meminfo), "MemTotal:", &m_total, 1 << 1)) {
put_question_marks(4);
return;
}
- if (s->opt == 'f') {
+ if (s->opt == 't') {
scale(m_total << 10);
return;
}
- if (rdval(proc_meminfo.file, "MemFree:", &m_free , 1)
- || rdval(proc_meminfo.file, "Buffers:", &m_bufs , 1)
- || rdval(proc_meminfo.file, "Cached:", &m_cached, 1)
- || rdval(proc_meminfo.file, "Slab:", &m_slab , 1)
+ if (rdval(proc_meminfo.file, "MemFree:", &m_free , 1 << 1)
+ || rdval(proc_meminfo.file, "Buffers:", &m_bufs , 1 << 1)
+ || rdval(proc_meminfo.file, "Cached:", &m_cached, 1 << 1)
+ || rdval(proc_meminfo.file, "Slab:", &m_slab , 1 << 1)
) {
put_question_marks(4);
return;
static s_stat* init_mem(const char *param)
{
- mem_stat *s = xmalloc(sizeof(mem_stat));
+ mem_stat *s = xzalloc(sizeof(*s));
s->collect = collect_mem;
s->opt = param[0];
return (s_stat*)s;
}
-
S_STAT(swp_stat)
S_STAT_END(swp_stat)
-static void collect_swp(swp_stat *s)
+static void FAST_FUNC collect_swp(swp_stat *s UNUSED_PARAM)
{
ullong s_total[1];
ullong s_free[1];
- if (rdval(get_file(&proc_meminfo), "SwapTotal:", s_total, 1)
- || rdval(proc_meminfo.file, "SwapFree:" , s_free, 1)
+ if (rdval(get_file(&proc_meminfo), "SwapTotal:", s_total, 1 << 1)
+ || rdval(proc_meminfo.file, "SwapFree:" , s_free, 1 << 1)
) {
put_question_marks(4);
return;
scale((s_total[0]-s_free[0]) << 10);
}
-static s_stat* init_swp(const char *param)
+static s_stat* init_swp(const char *param UNUSED_PARAM)
{
- swp_stat *s = xmalloc(sizeof(swp_stat));
+ swp_stat *s = xzalloc(sizeof(*s));
s->collect = collect_swp;
return (s_stat*)s;
}
-
S_STAT(fd_stat)
S_STAT_END(fd_stat)
-static void collect_fd(fd_stat *s)
+static void FAST_FUNC collect_fd(fd_stat *s UNUSED_PARAM)
{
ullong data[2];
- if (rdval(get_file(&proc_sys_fs_filenr), "", data, 1, 2)) {
+ if (rdval(get_file(&proc_sys_fs_filenr), "", data, 0
+ | (1 << 1)
+ | (1 << 2))
+ ) {
put_question_marks(4);
return;
}
scale(data[0] - data[1]);
}
-static s_stat* init_fd(const char *param)
+static s_stat* init_fd(const char *param UNUSED_PARAM)
{
- fd_stat *s = xmalloc(sizeof(fd_stat));
+ fd_stat *s = xzalloc(sizeof(*s));
s->collect = collect_fd;
return (s_stat*)s;
}
-
S_STAT(time_stat)
- int prec;
- int scale;
+ unsigned prec;
+ unsigned scale;
S_STAT_END(time_stat)
-static void collect_time(time_stat *s)
+static void FAST_FUNC collect_time(time_stat *s)
{
char buf[sizeof("12:34:56.123456")];
struct tm* tm;
- int us = tv.tv_usec + s->scale/2;
+ unsigned us = tv.tv_usec + s->scale/2;
time_t t = tv.tv_sec;
if (us >= 1000000) {
static s_stat* init_time(const char *param)
{
int prec;
- time_stat *s = xmalloc(sizeof(time_stat));
+ time_stat *s = xzalloc(sizeof(*s));
s->collect = collect_time;
- prec = param[0]-'0';
+ prec = param[0] - '0';
if (prec < 0) prec = 0;
else if (prec > 6) prec = 6;
s->prec = prec;
return (s_stat*)s;
}
-static void collect_info(s_stat *s)
+static void FAST_FUNC collect_info(s_stat *s)
{
gen ^= 1;
while (s) {
}
}
-
typedef s_stat* init_func(const char *param);
-static const char options[] ALIGN1 = "ncmsfixptbdr";
+static const char options[] ALIGN1 = "ncmsfixptbr";
static init_func *const init_functions[] = {
init_if,
init_cpu,
init_fork,
init_time,
init_blk,
- init_delay,
init_cr
};
-int nmeter_main(int argc, char **argv);
-int nmeter_main(int argc, char **argv)
+int nmeter_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int nmeter_main(int argc UNUSED_PARAM, char **argv)
{
char buf[32];
s_stat *first = NULL;
s_stat *last = NULL;
s_stat *s;
+ char *opt_d;
char *cur, *prev;
INIT_G();
xchdir("/proc");
- if (argc != 2)
- bb_show_usage();
+ if (open_read_close("version", buf, sizeof(buf)-1) > 0) {
+ buf[sizeof(buf)-1] = '\0';
+ is26 = (strstr(buf, " 2.4.") == NULL);
+ }
- if (open_read_close("version", buf, sizeof(buf)) > 0)
- is26 = (strstr(buf, " 2.4.")==NULL);
+ if (getopt32(argv, "d:", &opt_d)) {
+ G.delta = xatoi(opt_d) * 1000;
+ G.deltanz = G.delta > 0 ? G.delta : 1;
+ need_seconds = (1000000 % G.deltanz) != 0;
+ }
+ argv += optind;
+
+ if (!argv[0])
+ bb_show_usage();
- // Can use argv[1] directly, but this will mess up
+ // Can use argv[0] directly, but this will mess up
// parameters as seen by e.g. ps. Making a copy...
- cur = xstrdup(argv[1]);
+ cur = xstrdup(argv[0]);
while (1) {
char *param, *p;
prev = cur;
if (!cur)
break;
if (cur[1] == '%') { // %%
- strcpy(cur, cur+1);
+ overlapping_strcpy(cur, cur + 1);
cur++;
goto again;
}
s = init_functions[p-options](param);
if (s) {
s->label = prev;
- s->next = 0;
+ /*s->next = NULL; - all initXXX funcs use xzalloc */
if (!first)
first = s;
else
last->next = s;
last = s;
} else {
- // %NNNNd or %r option. remove it from string
- strcpy(prev + strlen(prev), cur);
+ // %r option. remove it from string
+ overlapping_strcpy(prev + strlen(prev), cur);
cur = prev;
}
}
if (prev[0]) {
s = init_literal();
s->label = prev;
- s->next = 0;
+ /*s->next = NULL; - all initXXX funcs use xzalloc */
if (!first)
first = s;
else
// Generate first samples but do not print them, they're bogus
collect_info(first);
reset_outbuf();
- if (delta >= 0) {
+ if (G.delta >= 0) {
gettimeofday(&tv, NULL);
- usleep(delta > 1000000 ? 1000000 : delta - tv.tv_usec%deltanz);
+ usleep(G.delta > 1000000 ? 1000000 : G.delta - tv.tv_usec % G.deltanz);
}
while (1) {
gettimeofday(&tv, NULL);
collect_info(first);
- put(final_str);
+ put_c(G.final_char);
print_outbuf();
// Negative delta -> no usleep at all
// time resolution ;)
// TODO: detect and avoid useless updates
// (like: nothing happens except time)
- if (delta >= 0) {
+ if (G.delta >= 0) {
int rem;
// can be commented out, will sacrifice sleep time precision a bit
gettimeofday(&tv, NULL);
if (need_seconds)
- rem = delta - ((ullong)tv.tv_sec*1000000 + tv.tv_usec) % deltanz;
+ rem = G.delta - ((ullong)tv.tv_sec*1000000 + tv.tv_usec) % G.deltanz;
else
- rem = delta - tv.tv_usec%deltanz;
+ rem = G.delta - (unsigned)tv.tv_usec % G.deltanz;
// Sometimes kernel wakes us up just a tiny bit earlier than asked
// Do not go to very short sleep in this case
- if (rem < delta/128) {
- rem += delta;
+ if (rem < (unsigned)G.delta / 128) {
+ rem += G.delta;
}
usleep(rem);
}