emo/procps
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Jim needs restrictions

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This commit is contained in:
albert
2002-11-27 00:24:01 +00:00
parent be982c88fd
commit 98895d57c1
7 changed files with 117 additions and 93 deletions
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55
ps/output.c
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@ -80,9 +80,8 @@
#define COLWID 240 /* satisfy snprintf, which is faster than sprintf */
static char whitespace_and_outbuf[OUTBUF_SIZE + SPACE_AMOUNT + PAGE_SIZE*2];
static char *outbuf = whitespace_and_outbuf+SPACE_AMOUNT;
static char *whitespace = whitespace_and_outbuf;
static char *outbuf;
static unsigned max_rightward = 0x12345678; /* space for RIGHT stuff */
static unsigned max_leftward = 0x12345678; /* space for LEFT stuff */
@ -100,7 +99,7 @@ static unsigned max_leftward = 0x12345678; /* space for LEFT stuff */
static int wide_signals; /* true if we have room */
static proc_t *pp; /* the process being printed */
static const proc_t *pp; /* the process being printed */
static unsigned long seconds_since_1970;
static unsigned long time_of_boot;
@ -1146,7 +1145,7 @@ static int sr_context ( const proc_t* P, const proc_t* Q ) {
/* temporary hack -- mark new stuff grabbed from Debian ps */
#define LNx LNX
/* there are about 195 listed */
/* there are about 211 listed */
/* Many of these are placeholders for unsupported options. */
static const format_struct format_array[] = {
@ -1605,7 +1604,7 @@ static void check_header_width(void){
/********** show one process (NULL proc prints header) **********/
void show_one_proc(proc_t* p){
void show_one_proc(const proc_t *restrict const p){
/* unknown: maybe set correct & actual to 1, remove +/- 1 below */
int correct = 0; /* screen position we should be at */
int actual = 0; /* screen position we are at */
@ -1614,7 +1613,7 @@ void show_one_proc(proc_t* p){
int space = 0; /* amount of space we actually need to print */
int dospace = 0; /* previous column determined that we need a space */
int legit = 0; /* legitimately stolen extra space */
format_node *fmt = format_list;
const format_node *restrict fmt = format_list;
static int did_stuff = 0; /* have we ever printed anything? */
if(-1==(long)p){ /* true only once, at the end */
@ -1724,7 +1723,7 @@ void show_one_proc(proc_t* p){
*/
space = correct - actual + leftpad;
if(space<1) space=dospace;
if(space>SPACE_AMOUNT) space=SPACE_AMOUNT;
if(space>page_size) space=page_size; // only have so much available
/* print data, set x position stuff */
amount = strlen(outbuf); /* post-chop data width */
@ -1759,6 +1758,7 @@ void show_one_proc(proc_t* p){
}
}
#ifdef TESTING
static void sanity_check(void){
format_struct *fs = format_array;
@ -1769,19 +1769,11 @@ static void sanity_check(void){
}
#endif
void init_output(void){
memset(whitespace, ' ', PAGE_SIZE);
#if 0
mprotect(whitespace, PAGE_SIZE, PROT_READ); /* FIXME may fail if unaligned */
mprotect(
(void *)((unsigned long)(whitespace_and_outbuf-PAGE_SIZE) &~ (PAGE_SIZE-1)),
PAGE_SIZE, PROT_NONE
);
#endif
seconds_since_1970 = time(NULL);
time_of_boot = seconds_since_1970 - seconds_since_boot;
meminfo();
switch(getpagesize()){
int outbuf_pages;
switch(page_size){
case 65536: page_shift = 16; break;
case 32768: page_shift = 15; break;
case 16384: page_shift = 14; break;
@ -1791,5 +1783,28 @@ void init_output(void){
case 2048: page_shift = 11; break;
case 1024: page_shift = 10; break;
}
outbuf_pages = OUTBUF_SIZE/page_size+1; // round up
outbuf = mmap(
0,
page_size * (1+1+outbuf_pages+1),
PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS,
-1,
0
);
mprotect(outbuf, page_size, PROT_NONE); // gaurd page
outbuf += page_size;
memset(outbuf, ' ', page_size);
mprotect(outbuf, page_size, PROT_READ); // space page
outbuf += page_size;
// now outbuf points where we want it
mprotect(outbuf + page_size * outbuf_pages, page_size, PROT_NONE); // gaurd page
seconds_since_1970 = time(NULL);
time_of_boot = seconds_since_1970 - seconds_since_boot;
meminfo();
check_header_width();
}