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SPACE_AMOUNT

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This commit is contained in:
albert 2002-12-03 22:53:45 +00:00
parent 029864fe4f
commit 1ab9afe8a5
1 changed files with 12 additions and 11 deletions
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23
ps/output.c
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@ -1603,6 +1603,9 @@ static void check_header_width(void){
/********** show one process (NULL proc prints header) **********/ /********** show one process (NULL proc prints header) **********/
//#define SPACE_AMOUNT page_size
#define SPACE_AMOUNT 128
static char *saved_outbuf; static char *saved_outbuf;
void show_one_proc(const proc_t *restrict const p){ void show_one_proc(const proc_t *restrict const p){
@ -1724,7 +1727,7 @@ void show_one_proc(const proc_t *restrict const p){
*/ */
space = correct - actual + leftpad; space = correct - actual + leftpad;
if(space<1) space=dospace; if(space<1) space=dospace;
if(space>page_size) space=page_size; // only have so much available if(space>SPACE_AMOUNT) space=SPACE_AMOUNT; // only have so much available
/* print data, set x position stuff */ /* print data, set x position stuff */
amount = strlen(outbuf); /* post-chop data width */ amount = strlen(outbuf); /* post-chop data width */
@ -1786,23 +1789,21 @@ void init_output(void){
case 1024: page_shift = 10; break; case 1024: page_shift = 10; break;
} }
outbuf_pages = OUTBUF_SIZE/page_size+1; // round up // add page_size-1 to round up
outbuf_pages = (OUTBUF_SIZE+SPACE_AMOUNT+page_size-1)/page_size;
outbuf = mmap( outbuf = mmap(
0, 0,
page_size * (1+1+outbuf_pages+1), page_size * (outbuf_pages+1), // 1 more, for guard page at high addresses
PROT_READ | PROT_WRITE, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, MAP_PRIVATE | MAP_ANONYMOUS,
-1, -1,
0 0
); );
mprotect(outbuf, page_size, PROT_NONE); // gaurd page memset(outbuf, ' ', SPACE_AMOUNT);
outbuf += page_size; if(SPACE_AMOUNT==page_size) mprotect(outbuf, page_size, PROT_READ);
memset(outbuf, ' ', page_size); mprotect(outbuf + page_size*outbuf_pages, page_size, PROT_NONE); // gaurd page
mprotect(outbuf, page_size, PROT_READ); // space page saved_outbuf = outbuf + SPACE_AMOUNT;
outbuf += page_size; // available space: page_size*outbuf_pages-SPACE_AMOUNT
// now outbuf points where we want it
mprotect(outbuf + page_size * outbuf_pages, page_size, PROT_NONE); // gaurd page
saved_outbuf = outbuf;
seconds_since_1970 = time(NULL); seconds_since_1970 = time(NULL);
time_of_boot = seconds_since_1970 - seconds_since_boot; time_of_boot = seconds_since_1970 - seconds_since_boot;