emo/procps
1
0
Fork 0
Code Issues Pull Requests Packages Releases Activity

misc

Browse Source
This commit is contained in:
albert
2004-08-18 02:22:13 +00:00
parent 792358ba42
commit 4acae28535
9 changed files with 160 additions and 57 deletions
Download Patch File Download Diff File Expand all files Collapse all files

55
ps/global.c
View File

@ -16,6 +16,9 @@
#include <pwd.h>
#include <grp.h>
#include <string.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "common.h"
@ -95,24 +98,48 @@ static void reset_selection_list(void){
selection_list = NULL;
}
/* The rules:
* 1. Defaults are implementation-specific. (ioctl,termcap,guess)
* 2. COLUMNS and LINES override the defaults. (standards compliance)
* 3. Command line options override everything else.
* 4. Actual output may be more if the above is too narrow.
*/
// The rules:
// 1. Defaults are implementation-specific. (ioctl,termcap,guess)
// 2. COLUMNS and LINES override the defaults. (standards compliance)
// 3. Command line options override everything else.
// 4. Actual output may be more if the above is too narrow.
//
// SysV tends to spew semi-wide output in all cases. The args
// will be limited to 64 or 80 characters, without regard to
// screen size. So lines of 120 to 160 chars are normal.
// Tough luck if you want more or less than that! HP-UX has a
// new "-x" option for 1024-char args in place of comm that
// we'll implement at some point.
//
// BSD tends to make a good effort, then fall back to 80 cols.
// Use "ww" to get infinity. This is nicer for "ps | less"
// and "watch ps". It can run faster too.
static void set_screen_size(void){
struct winsize ws;
char *columns; /* Unix98 environment variable */
char *lines; /* Unix98 environment variable */
if(ioctl(1, TIOCGWINSZ, &ws) != -1 && ws.ws_col>0 && ws.ws_row>0){
screen_cols = ws.ws_col;
screen_rows = ws.ws_row;
}else{ /* TODO: ought to do tgetnum("co") and tgetnum("li") now */
screen_cols = 80;
screen_rows = 24;
}
do{
int fd;
if(ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) != -1 && ws.ws_col>0 && ws.ws_row>0) break;
if(ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) != -1 && ws.ws_col>0 && ws.ws_row>0) break;
if(ioctl(STDIN_FILENO, TIOCGWINSZ, &ws) != -1 && ws.ws_col>0 && ws.ws_row>0) break;
fd = open("/dev/tty", O_NOCTTY|O_NONBLOCK|O_RDONLY);
if(fd != -1){
int ret = ioctl(fd, TIOCGWINSZ, &ws);
close(fd);
if(ret != -1 && ws.ws_col>0 && ws.ws_row>0) break;
}
// TODO: ought to do tgetnum("co") and tgetnum("li") here
ws.ws_col = 80;
ws.ws_row = 24;
}while(0);
screen_cols = ws.ws_col; // hmmm, NetBSD subtracts 1
screen_rows = ws.ws_row;
// TODO: delete this line
if(!isatty(STDOUT_FILENO)) screen_cols = OUTBUF_SIZE;
columns = getenv("COLUMNS");
if(columns && *columns){
long t;
@ -120,6 +147,7 @@ static void set_screen_size(void){
t = strtol(columns, &endptr, 0);
if(!*endptr && (t>0) && (t<(long)OUTBUF_SIZE)) screen_cols = (int)t;
}
lines = getenv("LINES");
if(lines && *lines){
long t;
@ -127,6 +155,7 @@ static void set_screen_size(void){
t = strtol(lines, &endptr, 0);
if(!*endptr && (t>0) && (t<(long)OUTBUF_SIZE)) screen_rows = (int)t;
}
if((screen_cols<9) || (screen_rows<2))
fprintf(stderr,"Your %dx%d screen size is bogus. Expect trouble.\n",
screen_cols, screen_rows