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This commit is contained in:
albert
2003-09-28 02:45:05 +00:00
parent c462dcfad5
commit ac6260bc23
11 changed files with 449 additions and 399 deletions
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55
proc/devname.c
View File

@@ -16,7 +16,6 @@
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/sysmacros.h>
#include "version.h"
#include "devname.h"
@@ -31,10 +30,23 @@
* dev_to_tty top, ps
*/
#if 0
#include <sys/sysmacros.h>
#define MAJOR_OF(d) ((unsigned)major(d))
#define MINOR_OF(d) ((unsigned)minor(d))
#else
#define MAJOR_OF(d) ( ((unsigned)(d)>>8u) & 0xfffu )
#define MINOR_OF(d) ( ((unsigned)(d)&0xffu) | (((unsigned)(d)&0xfff00000u)>>20u) )
#undef major
#undef minor
#define major <-- do not use -->
#define minor <-- do not use -->
#endif
typedef struct tty_map_node {
struct tty_map_node *next;
int major_number; /* not unsigned! Ugh... */
int minor_first, minor_last;
unsigned major_number;
unsigned minor_first, minor_last;
char name[16];
char devfs_type;
} tty_map_node;
@@ -76,7 +88,7 @@ static void load_drivers(void){
tmn->major_number = atoi(p);
p += strspn(p, "0123456789");
while(*p == ' ') p++;
switch(sscanf(p, "%d-%d", &tmn->minor_first, &tmn->minor_last)){
switch(sscanf(p, "%u-%u", &tmn->minor_first, &tmn->minor_last)){
default:
/* Can't finish parsing this line so we remove it from the list */
tty_map = tty_map->next;
@@ -95,7 +107,7 @@ fail:
}
/* Try to guess the device name from /proc/tty/drivers info. */
static int driver_name(char *restrict const buf, int maj, int min){
static int driver_name(char *restrict const buf, unsigned maj, unsigned min){
struct stat sbuf;
tty_map_node *tmn;
if(!tty_map) load_drivers();
@@ -112,16 +124,16 @@ static int driver_name(char *restrict const buf, int maj, int min){
sprintf(buf, "/dev/%s", tmn->name); /* like "/dev/ttyZZ255" */
if(stat(buf, &sbuf) < 0) return 0;
}
if(min != minor(sbuf.st_rdev)) return 0;
if(maj != major(sbuf.st_rdev)) return 0;
if(min != MINOR_OF(sbuf.st_rdev)) return 0;
if(maj != MAJOR_OF(sbuf.st_rdev)) return 0;
return 1;
}
/* Try to guess the device name (useful until /proc/PID/tty is added) */
static int guess_name(char *restrict const buf, int maj, int min){
static int guess_name(char *restrict const buf, unsigned maj, unsigned min){
struct stat sbuf;
int t0, t1;
int tmpmin = min;
unsigned tmpmin = min;
switch(maj){
case 4:
if(min<64){
@@ -166,8 +178,8 @@ static int guess_name(char *restrict const buf, int maj, int min){
default: return 0;
}
if(stat(buf, &sbuf) < 0) return 0;
if(min != minor(sbuf.st_rdev)) return 0;
if(maj != major(sbuf.st_rdev)) return 0;
if(min != MINOR_OF(sbuf.st_rdev)) return 0;
if(maj != MAJOR_OF(sbuf.st_rdev)) return 0;
return 1;
}
@@ -175,7 +187,7 @@ static int guess_name(char *restrict const buf, int maj, int min){
* Useful names could be in /proc/PID/fd/2 (stderr, seldom redirected)
* and in /proc/PID/fd/255 (used by bash to remember the tty).
*/
static int link_name(char *restrict const buf, int maj, int min, int pid, const char *restrict name){
static int link_name(char *restrict const buf, unsigned maj, unsigned min, int pid, const char *restrict name){
struct stat sbuf;
char path[32];
int count;
@@ -184,25 +196,26 @@ static int link_name(char *restrict const buf, int maj, int min, int pid, const
if(count == -1) return 0;
buf[count] = '\0';
if(stat(buf, &sbuf) < 0) return 0;
if(min != minor(sbuf.st_rdev)) return 0;
if(maj != major(sbuf.st_rdev)) return 0;
if(min != MINOR_OF(sbuf.st_rdev)) return 0;
if(maj != MAJOR_OF(sbuf.st_rdev)) return 0;
return 1;
}
/* number --> name */
unsigned dev_to_tty(char *restrict ret, unsigned chop, int dev, int pid, unsigned int flags) {
unsigned dev_to_tty(char *restrict ret, unsigned chop, dev_t dev_t_dev, int pid, unsigned int flags) {
static char buf[PAGE_SIZE];
char *restrict tmp = buf;
unsigned dev = dev_t_dev;
unsigned i = 0;
int c;
if((short)dev == (short)0) goto no_tty;
if(dev == 0u) goto no_tty;
if(linux_version_code > LINUX_VERSION(2, 7, 0)){ // not likely to make 2.6.xx
if(link_name(tmp, major(dev), minor(dev), pid, "tty" )) goto abbrev;
if(link_name(tmp, MAJOR_OF(dev), MINOR_OF(dev), pid, "tty" )) goto abbrev;
}
if(driver_name(tmp, major(dev), minor(dev) )) goto abbrev;
if( link_name(tmp, major(dev), minor(dev), pid, "fd/2" )) goto abbrev;
if( guess_name(tmp, major(dev), minor(dev) )) goto abbrev;
if( link_name(tmp, major(dev), minor(dev), pid, "fd/255")) goto abbrev;
if(driver_name(tmp, MAJOR_OF(dev), MINOR_OF(dev) )) goto abbrev;
if( link_name(tmp, MAJOR_OF(dev), MINOR_OF(dev), pid, "fd/2" )) goto abbrev;
if( guess_name(tmp, MAJOR_OF(dev), MINOR_OF(dev) )) goto abbrev;
if( link_name(tmp, MAJOR_OF(dev), MINOR_OF(dev), pid, "fd/255")) goto abbrev;
// fall through if unable to find a device file
no_tty:
strcpy(ret, "?");

2
proc/devname.h
View File

@@ -9,7 +9,7 @@ EXTERN_C_BEGIN
#define ABBREV_TTY 2 /* remove tty */
#define ABBREV_PTS 4 /* remove pts/ */
extern unsigned dev_to_tty(char *restrict ret, unsigned chop, int dev, int pid, unsigned int flags);
extern unsigned dev_to_tty(char *restrict ret, unsigned chop, dev_t dev_t_dev, int pid, unsigned int flags);
extern int tty_to_dev(const char *restrict const name);

24
proc/readproc.c
View File

@@ -65,7 +65,8 @@ typedef struct status_table_struct {
// Derived from:
// gperf -7 --language=ANSI-C --key-positions=1,3,4 -C -n -c sml.gperf
static void status2proc(char *S, proc_t *restrict P){
static void status2proc(char *S, proc_t *restrict P, int is_proc){
char ShdPnd[16] = "";
static const unsigned char asso[] = {
56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56,
56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56,
@@ -271,6 +272,13 @@ ENTER(0x220);
P->vm_stack = strtol(S,&S,10);
continue;
}
// recent kernels supply per-tgid pending signals
if(is_proc && *ShdPnd){
memcpy(P->signal, ShdPnd, 16);
P->signal[16] = '\0';
}
LEAVE(0x220);
}
@@ -494,7 +502,7 @@ static proc_t* simple_readproc(PROCTAB *restrict const PT, proc_t *restrict cons
if (flags & PROC_FILLSTATUS) { /* read, parse /proc/#/status */
if (likely( file2str(path, "status", sbuf, sizeof sbuf) != -1 )){
status2proc(sbuf, p);
status2proc(sbuf, p, 1);
}
}
@@ -559,13 +567,23 @@ static proc_t* simple_readtask(PROCTAB *restrict const PT, const proc_t *restric
}
if (unlikely(flags & PROC_FILLMEM)) { /* read, parse /proc/#/statm */
#if 0
if (likely( file2str(path, "statm", sbuf, sizeof sbuf) != -1 ))
statm2proc(sbuf, t); /* ignore statm errors here */
#else
t->size = p->size;
t->resident = p->resident;
t->share = p->share;
t->trs = p->trs;
t->lrs = p->lrs;
t->drs = p->drs;
t->dt = p->dt;
#endif
} /* statm fields just zero */
if (flags & PROC_FILLSTATUS) { /* read, parse /proc/#/status */
if (likely( file2str(path, "status", sbuf, sizeof sbuf) != -1 )){
status2proc(sbuf, t);
status2proc(sbuf, t, 0);
}
}

290
proc/readproc.h
View File

@@ -1,14 +1,14 @@
#ifndef PROCPS_PROC_READPROC_H
#define PROCPS_PROC_READPROC_H
/*
* New Interface to Process Table -- PROCTAB Stream (a la Directory streams)
* Copyright 1996 Charles L. Blake.
* Copyright 1998 Michael K. Johnson
* Copyright 1998-2003 Albert Cahalan
* May be distributed under the terms of the
* GNU Library General Public License, a copy of which is provided
* in the file COPYING
*/
// New Interface to Process Table -- PROCTAB Stream (a la Directory streams)
// Copyright 1996 Charles L. Blake.
// Copyright 1998 Michael K. Johnson
// Copyright 1998-2003 Albert Cahalan
// May be distributed under the terms of the
// GNU Library General Public License, a copy of which is provided
// in the file COPYING
#include "procps.h"
@@ -16,136 +16,134 @@
EXTERN_C_BEGIN
/*
ld cutime, cstime, priority, nice, timeout, it_real_value, rss,
c state,
d ppid, pgrp, session, tty, tpgid,
s signal, blocked, sigignore, sigcatch,
lu flags, min_flt, cmin_flt, maj_flt, cmaj_flt, utime, stime,
lu rss_rlim, start_code, end_code, start_stack, kstk_esp, kstk_eip,
lu start_time, vsize, wchan, nswap, cnswap,
*/
// ld cutime, cstime, priority, nice, timeout, it_real_value, rss,
// c state,
// d ppid, pgrp, session, tty, tpgid,
// s signal, blocked, sigignore, sigcatch,
// lu flags, min_flt, cmin_flt, maj_flt, cmaj_flt, utime, stime,
// lu rss_rlim, start_code, end_code, start_stack, kstk_esp, kstk_eip,
// lu start_time, vsize, wchan, nswap, cnswap,
// This is to help document a transition from pid to tgid/tid caused
// by the introduction of thread support. It is used in cases where
// neither tgid nor tid seemed correct. (in other words, FIXME)
#define XXXID tid
/* Basic data structure which holds all information we can get about a process.
* (unless otherwise specified, fields are read from /proc/#/stat)
*
* Most of it comes from task_struct in linux/sched.h
*/
// Basic data structure which holds all information we can get about a process.
// (unless otherwise specified, fields are read from /proc/#/stat)
//
// Most of it comes from task_struct in linux/sched.h
//
typedef struct proc_t {
// 1st 16 bytes
int
tid, /* process id */
ppid; /* pid of parent process */
tid, // (special) task id, the POSIX thread ID (see also: tgid)
ppid; // stat,status pid of parent process
unsigned
pcpu; /* %CPU usage (is not filled in by readproc!!!) */
pcpu; // stat (special) %CPU usage (is not filled in by readproc!!!)
char
state, /* single-char code for process state (S=sleeping) */
pad_1, /* padding */
pad_2, /* padding */
pad_3; /* padding */
state, // stat,status single-char code for process state (S=sleeping)
pad_1, // n/a padding
pad_2, // n/a padding
pad_3; // n/a padding
// 2nd 16 bytes
unsigned long long
utime, /* user-mode CPU time accumulated by process */
stime, /* kernel-mode CPU time accumulated by process */
utime, // stat user-mode CPU time accumulated by process
stime, // stat kernel-mode CPU time accumulated by process
// and so on...
cutime, /* cumulative utime of process and reaped children */
cstime, /* cumulative stime of process and reaped children */
start_time; /* start time of process -- seconds since 1-1-70 */
cutime, // stat cumulative utime of process and reaped children
cstime, // stat cumulative stime of process and reaped children
start_time; // stat start time of process -- seconds since 1-1-70
#ifdef SIGNAL_STRING
char
/* Linux 2.1.7x and up have 64 signals. Allow 64, plus '\0' and padding. */
signal[18], /* mask of pending signals */
blocked[18], /* mask of blocked signals */
sigignore[18], /* mask of ignored signals */
sigcatch[18]; /* mask of caught signals */
// Linux 2.1.7x and up have 64 signals. Allow 64, plus '\0' and padding.
signal[18], // status mask of pending signals
blocked[18], // status mask of blocked signals
sigignore[18], // status mask of ignored signals
sigcatch[18]; // status mask of caught signals
#else
long long
/* Linux 2.1.7x and up have 64 signals. */
signal, /* mask of pending signals */
blocked, /* mask of blocked signals */
sigignore, /* mask of ignored signals */
sigcatch; /* mask of caught signals */
// Linux 2.1.7x and up have 64 signals.
signal, // status mask of pending signals
blocked, // status mask of blocked signals
sigignore, // status mask of ignored signals
sigcatch; // status mask of caught signals
#endif
long
priority, /* kernel scheduling priority */
timeout, /* ? */
nice, /* standard unix nice level of process */
rss, /* resident set size from /proc/#/stat (pages) */
it_real_value, /* ? */
/* the next 7 members come from /proc/#/statm */
size, /* total # of pages of memory */
resident, /* number of resident set (non-swapped) pages (4k) */
share, /* number of pages of shared (mmap'd) memory */
trs, /* text resident set size */
lrs, /* shared-lib resident set size */
drs, /* data resident set size */
dt; /* dirty pages */
priority, // stat kernel scheduling priority
timeout, // stat ?
nice, // stat standard unix nice level of process
rss, // stat resident set size from /proc/#/stat (pages)
it_real_value, // stat ?
// the next 7 members come from /proc/#/statm
size, // statm total # of pages of memory
resident, // statm number of resident set (non-swapped) pages (4k)
share, // statm number of pages of shared (mmap'd) memory
trs, // statm text resident set size
lrs, // statm shared-lib resident set size
drs, // statm data resident set size
dt; // statm dirty pages
unsigned long
vm_size, /* same as vsize in kb */
vm_lock, /* locked pages in kb */
vm_rss, /* same as rss in kb */
vm_data, /* data size */
vm_stack, /* stack size */
vm_exe, /* executable size */
vm_lib, /* library size (all pages, not just used ones) */
rtprio, /* real-time priority */
sched, /* scheduling class */
vsize, /* number of pages of virtual memory ... */
rss_rlim, /* resident set size limit? */
flags, /* kernel flags for the process */
min_flt, /* number of minor page faults since process start */
maj_flt, /* number of major page faults since process start */
cmin_flt, /* cumulative min_flt of process and child processes */
cmaj_flt, /* cumulative maj_flt of process and child processes */
nswap, /* ? */
cnswap; /* cumulative nswap ? */
vm_size, // status same as vsize in kb
vm_lock, // status locked pages in kb
vm_rss, // status same as rss in kb
vm_data, // status data size
vm_stack, // status stack size
vm_exe, // status executable size
vm_lib, // status library size (all pages, not just used ones)
rtprio, // stat real-time priority
sched, // stat scheduling class
vsize, // stat number of pages of virtual memory ...
rss_rlim, // stat resident set size limit?
flags, // stat kernel flags for the process
min_flt, // stat number of minor page faults since process start
maj_flt, // stat number of major page faults since process start
cmin_flt, // stat cumulative min_flt of process and child processes
cmaj_flt, // stat cumulative maj_flt of process and child processes
nswap, // stat ?
cnswap; // stat cumulative nswap ?
unsigned KLONG
start_code, /* address of beginning of code segment */
end_code, /* address of end of code segment */
start_stack, /* address of the bottom of stack for the process */
kstk_esp, /* kernel stack pointer */
kstk_eip, /* kernel instruction pointer */
wchan; /* address of kernel wait channel proc is sleeping in */
start_code, // stat address of beginning of code segment
end_code, // stat address of end of code segment
start_stack, // stat address of the bottom of stack for the process
kstk_esp, // stat kernel stack pointer
kstk_eip, // stat kernel instruction pointer
wchan; // stat (special) address of kernel wait channel proc is sleeping in
char
**environ, /* environment string vector (/proc/#/environ) */
**cmdline; /* command line string vector (/proc/#/cmdline) */
**environ, // (special) environment string vector (/proc/#/environ)
**cmdline; // (special) command line string vector (/proc/#/cmdline)
char
/* Be compatible: Digital allows 16 and NT allows 14 ??? */
ruser[16], /* real user name */
euser[16], /* effective user name */
suser[16], /* saved user name */
fuser[16], /* filesystem user name */
rgroup[16], /* real group name */
egroup[16], /* effective group name */
sgroup[16], /* saved group name */
fgroup[16], /* filesystem group name */
cmd[16]; /* basename of executable file in call to exec(2) */
// Be compatible: Digital allows 16 and NT allows 14 ???
euser[16], // stat(),status effective user name
ruser[16], // status real user name
suser[16], // status saved user name
fuser[16], // status filesystem user name
rgroup[16], // status real group name
egroup[16], // status effective group name
sgroup[16], // status saved group name
fgroup[16], // status filesystem group name
cmd[16]; // stat,status basename of executable file in call to exec(2)
struct proc_t
*ring, // thread group ring
*next; // various library uses
*ring, // n/a thread group ring
*next; // n/a various library uses
int
ruid, rgid, /* real */
euid, egid, /* effective */
suid, sgid, /* saved */
fuid, fgid, /* fs (used for file access only) */
pgrp, /* process group id */
session, /* session id */
tty, /* full device number of controlling terminal */
tpgid, /* terminal process group id */
tgid, /* thread group ID */
exit_signal, /* might not be SIGCHLD */
processor; /* current (or most recent?) CPU */
pgrp, // stat process group id
session, // stat session id
tgid, // (special) task group ID, the POSIX PID (see also: tid)
tty, // stat full device number of controlling terminal
euid, egid, // stat(),status effective
ruid, rgid, // status real
suid, sgid, // status saved
fuid, fgid, // status fs (used for file access only)
tpgid, // stat terminal process group id
exit_signal, // stat might not be SIGCHLD
processor; // stat current (or most recent?) CPU
} proc_t;
/* PROCTAB: data structure holding the persistent information readproc needs
* from openproc(). The setup is intentionally similar to the dirent interface
* and other system table interfaces (utmp+wtmp come to mind).
*/
// PROCTAB: data structure holding the persistent information readproc needs
// from openproc(). The setup is intentionally similar to the dirent interface
// and other system table interfaces (utmp+wtmp come to mind).
#include <sys/types.h>
#include <dirent.h>
#include <unistd.h>
@@ -161,9 +159,9 @@ typedef struct PROCTAB {
int(*taskfinder)(struct PROCTAB *restrict const, const proc_t *restrict const, proc_t *restrict const, char *restrict const);
proc_t*(*taskreader)(struct PROCTAB *restrict const, const proc_t *restrict const, proc_t *restrict const, char *restrict const);
unsigned flags;
pid_t* pids; /* pids of the procs */
uid_t* uids; /* uids of procs */
int nuid; /* cannot really sentinel-terminate unsigned short[] */
pid_t* pids; // pids of the procs
uid_t* uids; // uids of procs
int nuid; // cannot really sentinel-terminate unsigned short[]
int i; // generic
unsigned u; // generic
void * vp; // generic
@@ -175,11 +173,11 @@ typedef struct PROCTAB {
extern PROCTAB* openproc(int flags, ... /* pid_t*|uid_t*|dev_t*|char* [, int n] */ );
/* Convenient wrapper around openproc and readproc to slurp in the whole process
* table subset satisfying the constraints of flags and the optional PID list.
* Free allocated memory with exit(). Access via tab[N]->member. The pointer
* list is NULL terminated.
*/
// Convenient wrapper around openproc and readproc to slurp in the whole process
// table subset satisfying the constraints of flags and the optional PID list.
// Free allocated memory with exit(). Access via tab[N]->member. The pointer
// list is NULL terminated.
extern proc_t** readproctab(int flags, ... /* same as openproc */ );
// clean-up open files, etc from the openproc()
@@ -194,37 +192,37 @@ extern int read_cmdline(char *restrict const dst, unsigned sz, unsigned pid);
extern void look_up_our_self(proc_t *p);
/* deallocate space allocated by readproc
*/
// deallocate space allocated by readproc
extern void freeproc(proc_t* p);
/* openproc/readproctab:
*
* Return PROCTAB* / *proc_t[] or NULL on error ((probably) "/proc" cannot be
* opened.) By default readproc will consider all processes as valid to parse
* and return, but not actually fill in the cmdline, environ, and /proc/#/statm
* derived memory fields.
*
* `flags' (a bitwise-or of PROC_* below) modifies the default behavior. The
* "fill" options will cause more of the proc_t to be filled in. The "filter"
* options all use the second argument as the pointer to a list of objects:
* process status', process id's, user id's. The third
* argument is the length of the list (currently only used for lists of user
* id's since uid_t supports no convenient termination sentinel.)
*/
#define PROC_FILLMEM 0x0001 /* read statm */
#define PROC_FILLCOM 0x0002 /* alloc and fill in `cmdline' */
#define PROC_FILLENV 0x0004 /* alloc and fill in `environ' */
#define PROC_FILLUSR 0x0008 /* resolve user id number -> user name */
#define PROC_FILLGRP 0x0010 /* resolve group id number -> group name */
#define PROC_FILLSTATUS 0x0020 /* read status -- currently unconditional */
#define PROC_FILLSTAT 0x0040 /* read stat -- currently unconditional */
#define PROC_FILLWCHAN 0x0080 /* look up WCHAN name */
#define PROC_FILLARG 0x0100 /* alloc and fill in `cmdline' */
// openproc/readproctab:
//
// Return PROCTAB* / *proc_t[] or NULL on error ((probably) "/proc" cannot be
// opened.) By default readproc will consider all processes as valid to parse
// and return, but not actually fill in the cmdline, environ, and /proc/#/statm
// derived memory fields.
//
// `flags' (a bitwise-or of PROC_* below) modifies the default behavior. The
// "fill" options will cause more of the proc_t to be filled in. The "filter"
// options all use the second argument as the pointer to a list of objects:
// process status', process id's, user id's. The third
// argument is the length of the list (currently only used for lists of user
// id's since uid_t supports no convenient termination sentinel.)
/* Obsolete, consider only processes with one of the passed: */
#define PROC_PID 0x1000 /* process id numbers ( 0 terminated) */
#define PROC_UID 0x4000 /* user id numbers ( length needed ) */
#define PROC_FILLMEM 0x0001 // read statm
#define PROC_FILLCOM 0x0002 // alloc and fill in `cmdline'
#define PROC_FILLENV 0x0004 // alloc and fill in `environ'
#define PROC_FILLUSR 0x0008 // resolve user id number -> user name
#define PROC_FILLGRP 0x0010 // resolve group id number -> group name
#define PROC_FILLSTATUS 0x0020 // read status -- currently unconditional
#define PROC_FILLSTAT 0x0040 // read stat -- currently unconditional
#define PROC_FILLWCHAN 0x0080 // look up WCHAN name
#define PROC_FILLARG 0x0100 // alloc and fill in `cmdline'
// Obsolete, consider only processes with one of the passed:
#define PROC_PID 0x1000 // process id numbers ( 0 terminated)
#define PROC_UID 0x4000 // user id numbers ( length needed )
// it helps to give app code a few spare bits
#define PROC_SPARE_1 0x01000000