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Dynamically resize the Disk column. It was too narrow for modern

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disk device names such as da0s1b.  So we also get rid of the nasty
constant 5 scattered over the code.

Implementing this change is a good chance to improve other bits
around it: init saved lengths early, always check return value from
kvm_getswapinfo().
This commit is contained in:
Yaroslav Tykhiy 2006-12-23 18:54:49 +00:00
parent 35e0662415
commit c19a20a7d1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=165501
1 changed files with 46 additions and 21 deletions
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67
usr.bin/systat/swap.c
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@ -62,6 +62,7 @@ kvm_t *kd;
static char *header;
static long blocksize;
static int dlen, odlen;
static int hlen;
static int ulen, oulen;
static int pagesize;
@ -89,12 +90,36 @@ closeswap(w)
* Kevin Lahey <kml@rokkaku.atl.ga.us>.
*/
#define NSWAP 16
static struct kvm_swap kvmsw[NSWAP];
static int kvnsw, okvnsw;
#define CONVERT(v) ((int)((int64_t)(v) * pagesize / blocksize))
static void
calclens()
{
int i, n;
int len;
dlen = sizeof("Disk");
for (i = 0; i < kvnsw; ++i) {
len = strlen(kvmsw[i].ksw_devname);
if (dlen < len)
dlen = len;
}
ulen = sizeof("Used");
for (n = CONVERT(kvmsw[kvnsw].ksw_used), len = 2; n /= 10; ++len);
if (ulen < len)
ulen = len;
}
int
initswap()
{
char msgbuf[BUFSIZ];
static int once = 0;
struct kvm_swap dummy;
if (once)
return (1);
@ -102,33 +127,33 @@ initswap()
header = getbsize(&hlen, &blocksize);
pagesize = getpagesize();
if (kvm_getswapinfo(kd, &dummy, 1, 0) < 0) {
snprintf(msgbuf, sizeof(msgbuf), "systat: kvm_getswapinfo failed");
error("%s", msgbuf);
if ((kvnsw = kvm_getswapinfo(kd, kvmsw, NSWAP, 0)) < 0) {
error("systat: kvm_getswapinfo failed");
return (0);
}
okvnsw = kvnsw;
calclens();
odlen = dlen;
oulen = ulen;
once = 1;
return (1);
}
static struct kvm_swap kvmsw[16];
static int kvnsw, okvnsw;
#define CONVERT(v) ((int)((int64_t)(v) * pagesize / blocksize))
void
fetchswap()
{
int n;
okvnsw = kvnsw;
kvnsw = kvm_getswapinfo(kd, kvmsw, 16, 0);
if ((kvnsw = kvm_getswapinfo(kd, kvmsw, NSWAP, 0)) < 0) {
error("systat: kvm_getswapinfo failed");
return;
}
odlen = dlen;
oulen = ulen;
for (n = CONVERT(kvmsw[kvnsw].ksw_used), ulen = 2; n /= 10; ++ulen);
if (ulen < sizeof("Used"))
ulen = sizeof("Used");
calclens();
}
void
@ -141,8 +166,8 @@ labelswap()
werase(wnd);
mvwprintw(wnd, 0, 0, "%-5s%*s%*s %s",
"Disk", hlen, header, ulen, "Used",
mvwprintw(wnd, 0, 0, "%*s%*s%*s %s",
-dlen, "Disk", hlen, header, ulen, "Used",
"/0% /10 /20 /30 /40 /50 /60 /70 /80 /90 /100");
for (i = 0; i <= kvnsw; ++i) {
@ -152,7 +177,7 @@ labelswap()
name = "Total";
} else
name = kvmsw[i].ksw_devname;
mvwprintw(wnd, i + 1, 0, "%-5s", name);
mvwprintw(wnd, i + 1, 0, "%*s", -dlen, name);
}
}
@ -162,7 +187,7 @@ showswap()
int count;
int i;
if (kvnsw != okvnsw || ulen != oulen)
if (kvnsw != okvnsw || dlen != odlen || ulen != oulen)
labelswap();
for (i = 0; i <= kvnsw; ++i) {
@ -175,13 +200,13 @@ showswap()
mvwprintw(
wnd,
i + 1,
5 + hlen + ulen + 1,
dlen + hlen + ulen + 1,
"(swap not configured)"
);
continue;
}
wmove(wnd, i + 1, 5);
wmove(wnd, i + 1, dlen);
wprintw(wnd, "%*d", hlen, CONVERT(kvmsw[i].ksw_total));
wprintw(wnd, "%*d", ulen, CONVERT(kvmsw[i].ksw_used));