procps/ps/display.c

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/*
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* Copyright 1998-2003 by Albert Cahalan; all rights resered.
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* This file may be used subject to the terms and conditions of the
* GNU Library General Public License Version 2, or any later version
* at your option, as published by the Free Software Foundation.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*/
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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
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#if (__GNU_LIBRARY__ >= 6)
# include <locale.h>
#endif
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/* username lookups */
#include <sys/types.h>
#include <pwd.h>
#include <grp.h>
/* major/minor number */
#include <sys/sysmacros.h>
#include <signal.h> /* catch signals */
#include "common.h"
#include "../proc/alloc.h"
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#include "../proc/wchan.h"
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#include "../proc/version.h"
#include "../proc/readproc.h"
#include "../proc/sysinfo.h"
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#include "../proc/sig.h"
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#ifndef SIGCHLD
#define SIGCHLD SIGCLD
#endif
/* just reports a crash */
static void signal_handler(int signo){
if(signo==SIGPIPE) _exit(0); /* "ps | head" will cause this */
/* fprintf() is not reentrant, but we _exit() anyway */
fprintf(stderr,
_("\n\n"
"Signal %d (%s) caught by %s (%s).\n"
"Please send bug reports to <procps@freelists.org>\n"),
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signo,
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signal_number_to_name(signo),
program_invocation_short_name,
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procps_version
);
_exit(signo+128);
}
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/////////////////////////////////////////////////////////////////////////////////////
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#undef DEBUG
#ifdef DEBUG
void init_stack_trace(char *prog_name);
#include <ctype.h>
void hex_dump(void *vp){
char *charlist;
int i = 0;
int line = 45;
char *cp = (char *)vp;
while(line--){
printf("%8lx ", (unsigned long)cp);
charlist = cp;
cp += 16;
for(i=0; i<16; i++){
if((charlist[i]>31) && (charlist[i]<127)){
printf("%c", charlist[i]);
}else{
printf(".");
}
}
printf(" ");
for(i=0; i<16; i++) printf(" %2x",(unsigned int)((unsigned char)(charlist[i])));
printf("\n");
i=0;
}
}
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static void show_tgid(char *s, int n, sel_union *data){
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printf("%s ", s);
while(--n){
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printf("%d,", data[n].tgid);
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}
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printf("%d\n", data[0].tgid);
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}
static void show_uid(char *s, int n, sel_union *data){
struct passwd *pw_data;
printf("%s ", s);
while(--n){
pw_data = getpwuid(data[n].uid);
if(pw_data) printf("%s,", pw_data->pw_name);
else printf("%d,", data[n].uid);
}
pw_data = getpwuid(data[n].uid);
if(pw_data) printf("%s\n", pw_data->pw_name);
else printf("%d\n", data[n].uid);
}
static void show_gid(char *s, int n, sel_union *data){
struct group *gr_data;
printf("%s ", s);
while(--n){
gr_data = getgrgid(data[n].gid);
if(gr_data) printf("%s,", gr_data->gr_name);
else printf("%d,", data[n].gid);
}
gr_data = getgrgid(data[n].gid);
if(gr_data) printf("%s\n", gr_data->gr_name);
else printf("%d\n", data[n].gid);
}
static void show_tty(char *s, int n, sel_union *data){
printf("%s ", s);
while(--n){
printf("%d:%d,", (int)major(data[n].tty), (int)minor(data[n].tty));
}
printf("%d:%d\n", (int)major(data[n].tty), (int)minor(data[n].tty));
}
static void show_cmd(char *s, int n, sel_union *data){
printf("%s ", s);
while(--n){
printf("%.8s,", data[n].cmd);
}
printf("%.8s\n", data[0].cmd);
}
static void arg_show(void){
selection_node *walk = selection_list;
while(walk){
switch(walk->typecode){
case SEL_RUID: show_uid("RUID", walk->n, walk->u); break;
case SEL_EUID: show_uid("EUID", walk->n, walk->u); break;
case SEL_SUID: show_uid("SUID", walk->n, walk->u); break;
case SEL_FUID: show_uid("FUID", walk->n, walk->u); break;
case SEL_RGID: show_gid("RGID", walk->n, walk->u); break;
case SEL_EGID: show_gid("EGID", walk->n, walk->u); break;
case SEL_SGID: show_gid("SGID", walk->n, walk->u); break;
case SEL_FGID: show_gid("FGID", walk->n, walk->u); break;
case SEL_PGRP: show_pid("PGRP", walk->n, walk->u); break;
case SEL_PID : show_pid("PID ", walk->n, walk->u); break;
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case SEL_PPID: show_pid("PPID", walk->n, walk->u); break;
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case SEL_TTY : show_tty("TTY ", walk->n, walk->u); break;
case SEL_SESS: show_pid("SESS", walk->n, walk->u); break;
case SEL_COMM: show_cmd("COMM", walk->n, walk->u); break;
default: printf(_("Garbage typecode value!\n"));
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}
walk = walk->next;
}
}
#endif
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//////////////////////////////////////////////////////////////////////////
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/***** check the header */
/* Unix98: must not print empty header */
static void check_headers(void){
format_node *walk = format_list;
int head_normal = 0;
if(header_type==HEAD_MULTI){
header_gap = screen_rows-1; /* true BSD */
return;
}
if(header_type==HEAD_NONE){
lines_to_next_header = -1; /* old Linux */
return;
}
while(walk){
if(!*(walk->name)){
walk = walk->next;
continue;
}
if(walk->pr){
head_normal++;
walk = walk->next;
continue;
}
walk = walk->next;
}
if(!head_normal) lines_to_next_header = -1; /* how UNIX does --noheader */
}
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/***** check sort needs */
/* see what files need to be read, etc. */
static unsigned check_sort_needs(sort_node *walk){
unsigned needs = 0;
while(walk){
needs |= walk->need;
walk = walk->next;
}
return needs;
}
/***** check needs */
/* see what files need to be read, etc. */
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static unsigned collect_format_needs(format_node *walk){
unsigned needs = 0;
while(walk){
needs |= walk->need;
walk = walk->next;
}
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return needs;
}
static format_node *proc_format_list;
static format_node *task_format_list;
static unsigned needs_for_threads;
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static unsigned needs_for_sort;
static unsigned proc_format_needs;
static unsigned task_format_needs;
#define needs_for_format (proc_format_needs|task_format_needs)
#define PROC_ONLY_FLAGS (PROC_FILLENV|PROC_FILLARG|PROC_FILLCOM|PROC_FILLMEM|PROC_FILLCGROUP)
enhanced libproc cgroup/cmdline support, exploited by top Library Changes . added PROC_EDITCMDLCVT flag . added an internal (static) fill_cmdline_cvt function: - reads and "escapes" /proc/#/cmdline - returns result as a single string in a single vector - callers are guaranteed a cmdline (no more NULL) . added vectorize_this_str function, exploited by fill_cgroup_cvt, fill_cmdline_cvt . generalized read_cmdline function as read_unvectored, now exploited by fill_cgroup_cvt, fill_cmdline_cvt, read_cmdline ( cgroup and cmdline no longer need be converted to string ) ( vectors before being transformed to final representation ) . fixed bug regarding skipped group numbers (when enabled) . escape_str made responsible for all single byte translation with distinction between control chars + other unprintable . added escaped_copy function for already escaped strings . reorganized parts of proc_t to restore formatting standards ( displacement changes shouldn't matter with new version # ) . former ZAP_SUSEONLY #define now OOMEM_ENABLE . added to library.map: escaped_copy; read_cmdline Top Program Changes . exploited the new PROC_EDITCMDLCVT provision . eliminated now obsolete #include "proc/escape.h" . changed the P_WCH display format if no kernel symbol table . fixed very old bug in lflgs for out-of-view sort fields . former ZAP_SUSEONLY #define now OOMEM_ENABLE Ps Program Changes . exploited the new PROC_EDITCMDLCVT provision . exploited the new escaped_copy function . consolidated pr_args and pr_comm into pr_argcom Signed-off-by: Jan Görig <jgorig@redhat.com>
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/***** munge lists and determine openproc() flags */
static void lists_and_needs(void){
check_headers();
// only care about the difference when showing both
if(thread_flags & TF_show_both){
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format_node pfn, tfn; // junk, to handle special case at begin of list
format_node *walk = format_list;
format_node *p_end = &pfn;
format_node *t_end = &tfn;
while(walk){
format_node *new = malloc(sizeof(format_node));
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memcpy(new,walk,sizeof(format_node));
p_end->next = walk;
t_end->next = new;
p_end = walk;
t_end = new;
switch(walk->flags & CF_PRINT_MASK){
case CF_PRINT_THREAD_ONLY:
p_end->pr = pr_nop;
p_end->need = 0;
break;
case CF_PRINT_PROCESS_ONLY:
t_end->pr = pr_nop;
t_end->need = 0;
break;
default:
fprintf(stderr, _("please report this bug\n"));
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// FALL THROUGH
case CF_PRINT_AS_NEEDED:
case CF_PRINT_EVERY_TIME:
break;
}
walk = walk->next;
}
t_end->next = NULL;
p_end->next = NULL;
proc_format_list = pfn.next;
task_format_list = tfn.next;
}else{
proc_format_list = format_list;
task_format_list = format_list;
}
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proc_format_needs = collect_format_needs(proc_format_list);
task_format_needs = collect_format_needs(task_format_list);
needs_for_sort = check_sort_needs(sort_list);
// move process-only flags to the process
proc_format_needs |= (task_format_needs &~ PROC_ONLY_FLAGS);
task_format_needs &= ~PROC_ONLY_FLAGS;
if(bsd_c_option){
proc_format_needs &= ~PROC_FILLARG;
needs_for_sort &= ~PROC_FILLARG;
}
if(!unix_f_option){
proc_format_needs &= ~PROC_FILLCOM;
needs_for_sort &= ~PROC_FILLCOM;
}
// convert ARG to COM as a standard
if(proc_format_needs & PROC_FILLARG){
enhanced libproc cgroup/cmdline support, exploited by top Library Changes . added PROC_EDITCMDLCVT flag . added an internal (static) fill_cmdline_cvt function: - reads and "escapes" /proc/#/cmdline - returns result as a single string in a single vector - callers are guaranteed a cmdline (no more NULL) . added vectorize_this_str function, exploited by fill_cgroup_cvt, fill_cmdline_cvt . generalized read_cmdline function as read_unvectored, now exploited by fill_cgroup_cvt, fill_cmdline_cvt, read_cmdline ( cgroup and cmdline no longer need be converted to string ) ( vectors before being transformed to final representation ) . fixed bug regarding skipped group numbers (when enabled) . escape_str made responsible for all single byte translation with distinction between control chars + other unprintable . added escaped_copy function for already escaped strings . reorganized parts of proc_t to restore formatting standards ( displacement changes shouldn't matter with new version # ) . former ZAP_SUSEONLY #define now OOMEM_ENABLE . added to library.map: escaped_copy; read_cmdline Top Program Changes . exploited the new PROC_EDITCMDLCVT provision . eliminated now obsolete #include "proc/escape.h" . changed the P_WCH display format if no kernel symbol table . fixed very old bug in lflgs for out-of-view sort fields . former ZAP_SUSEONLY #define now OOMEM_ENABLE Ps Program Changes . exploited the new PROC_EDITCMDLCVT provision . exploited the new escaped_copy function . consolidated pr_args and pr_comm into pr_argcom Signed-off-by: Jan Görig <jgorig@redhat.com>
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proc_format_needs |= (PROC_FILLCOM | PROC_EDITCMDLCVT);
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proc_format_needs &= ~PROC_FILLARG;
}
if(bsd_e_option){
if(proc_format_needs&PROC_FILLCOM) proc_format_needs |= PROC_FILLENV;
}
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/* FIXME broken filthy hack -- got to unify some stuff here */
if( ( (proc_format_needs|task_format_needs|needs_for_sort) & PROC_FILLWCHAN) && !wchan_is_number)
if (open_psdb(namelist_file)) wchan_is_number = 1;
if(thread_flags&TF_loose_tasks) needs_for_threads |= PROC_LOOSE_TASKS;
}
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//////////////////////////////////////////////////////////////////////////
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/***** fill in %CPU; not in libproc because of include_dead_children */
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/* Note: for sorting, not display, so 0..0x7fffffff would be OK */
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static int want_this_proc_pcpu(proc_t *buf){
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unsigned long long used_jiffies;
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unsigned long pcpu = 0;
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unsigned long long avail_jiffies;
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if(!want_this_proc(buf)) return 0;
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used_jiffies = buf->utime + buf->stime;
if(include_dead_children) used_jiffies += (buf->cutime + buf->cstime);
avail_jiffies = seconds_since_boot * Hertz - buf->start_time;
if(avail_jiffies) pcpu = (used_jiffies << 24) / avail_jiffies;
buf->pcpu = pcpu; // fits in an int, summing children on 128 CPUs
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return 1;
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}
/***** just display */
static void simple_spew(void){
static proc_t buf, buf2; // static avoids memset
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PROCTAB* ptp;
ptp = openproc(needs_for_format | needs_for_sort | needs_for_select | needs_for_threads);
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if(!ptp) {
fprintf(stderr, _("Error: can not access /proc.\n"));
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exit(1);
}
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switch(thread_flags & (TF_show_proc|TF_loose_tasks|TF_show_task)){
case TF_show_proc: // normal non-thread output
while(readproc(ptp,&buf)){
if(want_this_proc(&buf)){
show_one_proc(&buf, proc_format_list);
}
}
break;
case TF_show_proc|TF_loose_tasks: // H option
while(readproc(ptp,&buf)){
// must still have the process allocated
while(readtask(ptp,&buf,&buf2)){
if(!want_this_proc(&buf)) continue;
show_one_proc(&buf2, task_format_list);
}
}
break;
case TF_show_proc|TF_show_task: // m and -m options
while(readproc(ptp,&buf)){
if(want_this_proc(&buf)){
show_one_proc(&buf, proc_format_list);
// must still have the process allocated
while(readtask(ptp,&buf,&buf2)) show_one_proc(&buf2, task_format_list);
}
}
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break;
case TF_show_task: // -L and -T options
while(readproc(ptp,&buf)){
if(want_this_proc(&buf)){
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// must still have the process allocated
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while(readtask(ptp,&buf,&buf2)) show_one_proc(&buf2, task_format_list);
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}
}
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break;
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}
closeproc(ptp);
}
/***** forest output requires sorting by ppid; add start_time by default */
static void prep_forest_sort(void){
sort_node *tmp_list = sort_list;
const format_struct *incoming;
if(!sort_list) { /* assume start time order */
incoming = search_format_array("start_time");
if(!incoming) { fprintf(stderr, _("Could not find start_time!\n")); exit(1); }
tmp_list = malloc(sizeof(sort_node));
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tmp_list->reverse = 0;
tmp_list->typecode = '?'; /* what was this for? */
tmp_list->sr = incoming->sr;
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tmp_list->need = incoming->need;
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tmp_list->next = sort_list;
sort_list = tmp_list;
}
/* this is required for the forest option */
incoming = search_format_array("ppid");
if(!incoming) { fprintf(stderr, _("Could not find ppid!\n")); exit(1); }
tmp_list = malloc(sizeof(sort_node));
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tmp_list->reverse = 0;
tmp_list->typecode = '?'; /* what was this for? */
tmp_list->sr = incoming->sr;
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tmp_list->need = incoming->need;
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tmp_list->next = sort_list;
sort_list = tmp_list;
}
/* we rely on the POSIX requirement for zeroed memory */
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//static proc_t *processes[98*1024]; // FIXME
static proc_t **processes;
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/***** compare function for qsort */
static int compare_two_procs(const void *a, const void *b){
sort_node *tmp_list = sort_list;
while(tmp_list){
int result;
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result = (*tmp_list->sr)(*(const proc_t *const*)a, *(const proc_t *const*)b);
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if(result) return (tmp_list->reverse) ? -result : result;
tmp_list = tmp_list->next;
}
return 0; /* no conclusion */
}
/***** show pre-sorted array of process pointers */
static void show_proc_array(PROCTAB *restrict ptp, int n){
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proc_t **p = processes;
while(n--){
if(thread_flags & TF_show_proc) show_one_proc(*p, proc_format_list);
if(thread_flags & TF_show_task){
static proc_t buf2; // static avoids memset
// must still have the process allocated
while(readtask(ptp,*p,&buf2)) show_one_proc(&buf2, task_format_list);
}
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p++;
}
}
/***** show tree */
/* this needs some optimization work */
#define ADOPTED(x) 1
static void show_tree(const int self, const int n, const int level, const int have_sibling){
int i = 0;
if(level){
/* add prefix of "+" or "L" */
if(have_sibling) forest_prefix[level-1] = '+';
else forest_prefix[level-1] = 'L';
forest_prefix[level] = '\0';
}
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show_one_proc(processes[self],format_list); /* first show self */
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for(;;){ /* look for children */
if(i >= n) return; /* no children */
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if(processes[i]->ppid == processes[self]->XXXID) break;
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i++;
}
if(level){
/* change our prefix to "|" or " " for the children */
if(have_sibling) forest_prefix[level-1] = '|';
else forest_prefix[level-1] = ' ';
forest_prefix[level] = '\0';
}
for(;;){
int self_pid;
int more_children = 1;
if(i >= n) break; /* over the edge */
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self_pid=processes[self]->XXXID;
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if(i+1 >= n)
more_children = 0;
else
if(processes[i+1]->ppid != self_pid) more_children = 0;
if(self_pid==1 && ADOPTED(processes[i]) && forest_type!='u')
show_tree(i++, n, level, more_children);
else
show_tree(i++, n, level+1, more_children);
if(!more_children) break;
}
/* chop prefix that children added -- do we need this? */
forest_prefix[level] = '\0';
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// memset(processes[self], '$', sizeof(proc_t)); /* debug */
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}
/***** show forest */
static void show_forest(const int n){
int i = n;
int j;
while(i--){ /* cover whole array looking for trees */
j = n;
while(j--){ /* search for parent: if none, i is a tree! */
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if(processes[j]->XXXID == processes[i]->ppid) goto not_root;
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}
show_tree(i,n,0,0);
not_root:
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;
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}
/* don't free the array because it takes time and ps will exit anyway */
}
#if 0
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static int want_this_proc_nop(proc_t *dummy){
(void)dummy;
return 1;
}
#endif
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/***** sorted or forest */
static void fancy_spew(void){
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proc_data_t *pd = NULL;
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PROCTAB *restrict ptp;
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int n = 0; /* number of processes & index into array */
ptp = openproc(needs_for_format | needs_for_sort | needs_for_select | needs_for_threads);
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if(!ptp) {
fprintf(stderr, _("Error: can not access /proc.\n"));
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exit(1);
}
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if(thread_flags & TF_loose_tasks){
pd = readproctab3(want_this_proc_pcpu, ptp);
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}else{
pd = readproctab2(want_this_proc_pcpu, (void*)0xdeadbeaful, ptp);
}
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n = pd->n;
processes = pd->tab;
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if(!n) return; /* no processes */
if(forest_type) prep_forest_sort();
qsort(processes, n, sizeof(proc_t*), compare_two_procs);
if(forest_type) show_forest(n);
else show_proc_array(ptp,n);
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closeproc(ptp);
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}
/***** no comment */
int main(int argc, char *argv[]){
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#if (__GNU_LIBRARY__ >= 6)
setlocale (LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
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#endif
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#ifdef DEBUG
init_stack_trace(argv[0]);
#else
do {
struct sigaction sa;
int i = 32;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = signal_handler;
sigfillset(&sa.sa_mask);
while(i--) switch(i){
default:
sigaction(i,&sa,NULL);
case 0:
case SIGINT: /* ^C */
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case SIGTSTP: /* ^Z */
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case SIGTTOU: /* see stty(1) man page */
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case SIGQUIT: /* ^\ */
case SIGPROF: /* profiling */
case SIGKILL: /* can not catch */
case SIGSTOP: /* can not catch */
case SIGWINCH: /* don't care if window size changes */
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;
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}
} while (0);
#endif
reset_global(); /* must be before parser */
arg_parse(argc,argv);
/* arg_show(); */
trace(_("screen is %ux%u\n"),screen_cols,screen_rows);
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/* printf("sizeof(proc_t) is %d.\n", sizeof(proc_t)); */
trace(_("======= ps output follows =======\n"));
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init_output(); /* must be between parser and output */
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lists_and_needs();
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if(forest_type || sort_list) fancy_spew(); /* sort or forest */
else simple_spew(); /* no sort, no forest */
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show_one_proc((proc_t *)-1,format_list); /* no output yet? */
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return 0;
}