sbm

simple bandwidth monitor
git clone git://git.2f30.org/sbm.git
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commit 62e66fce04b47d592ae7ae79b04d7deca80092dc
parent c1a0c5055310876235e7de09a120cf21db105001
Author: sin <sin@2f30.org>
Date:   Fri Feb 19 11:35:00 +0000

Add [-c count] option to limit the number of samples

Diffstat:
sbm.1 | 9++++++++-
sbm.c | 19++++++++++++++++---
2 files changed, 24 insertions(+), 4 deletions(-)
diff --git a/sbm.1 b/sbm.1 @@ -1,4 +1,4 @@ -.Dd Feb 16, 2016 +.Dd Feb 19, 2016 .Dt SBM 1 .Os .Sh NAME @@ -7,6 +7,7 @@ .Sh SYNOPSIS .Nm sbm .Op Fl i Ar interface +.Op Fl c Ar count .Sh DESCRIPTION .Nm is a simple bandwidth monitor. @@ -15,6 +16,12 @@ is a simple bandwidth monitor. .It Fl i Ar interface Monitor the selected interface. If not provided the first active, non-loopback interface will be used. +.It Fl c Ar count +Stop monitoring after +.Ar count +samples. If +.Ar count +is 0, it will loop forever. This is the default. .El .Sh AUTHORS .An Dimitris Papastamos Aq Mt sin@2f30.org diff --git a/sbm.c b/sbm.c @@ -27,7 +27,9 @@ #endif #include <err.h> +#include <errno.h> #include <ifaddrs.h> +#include <limits.h> #include <stdio.h> #include <stdlib.h> #include <string.h> @@ -175,12 +177,13 @@ print(char *ifname, unsigned long long rxbits, unsigned long long txbits, } void -loop(char *ifname) +loop(char *ifname, long count) { unsigned long long oldrxbytes, rxbytes; unsigned long long oldtxbytes, txbytes; unsigned long long oldrxpps, rxpps; unsigned long long oldtxpps, txpps; + long n = 0; sample(ifname, &oldrxbytes, &oldtxbytes, &oldrxpps, &oldtxpps); for (;;) { @@ -195,13 +198,15 @@ loop(char *ifname) oldtxbytes = txbytes; oldrxpps = rxpps; oldtxpps = txpps; + if (count && ++n >= count) + break; } } void usage(void) { - fprintf(stderr, "usage: %s [-i interface]\n", argv0); + fprintf(stderr, "usage: %s [-c count] [-i interface]\n", argv0); exit(1); } @@ -209,8 +214,16 @@ int main(int argc, char *argv[]) { char ifname[IF_NAMESIZE] = ""; + char *end; + long count = 0; ARGBEGIN { + case 'c': + errno = 0; + count = strtol(EARGF(usage()), &end, 10); + if (*end != '\0' || errno) + errx(1, "invalid count"); + break; case 'i': strncpy(ifname, EARGF(usage()), sizeof(ifname)); ifname[IF_NAMESIZE - 1] = '\0'; @@ -220,6 +233,6 @@ main(int argc, char *argv[]) } ARGEND scan(ifname); - loop(ifname); + loop(ifname, count); return 0; }