[Mac OS X] Liste des processus via sysctl

**sinfoni** · 04/05/2010, 14h41

Bonjour,

Je souhaite récupérer la liste des processus sous Mac OS X. Pour ça, j'utilise le code suivant:

Code :

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function GetProcess : integer;
var
i: integer;
mib : array [0..2] of Cint;
len: cint;
kp: PChar;
 
begin
    // On dit ce qu'on souhaite récupérer
    mib[0] := CTL_KERN;
    mib[1] := KERN_PROC;
    mib[2] := KERN_PROC_ALL;
    //mib[3] := 0;
    len := 0;
   //Un premier appel "à vide" donne la taille des infos disponibles
    if (sysctl.FPsysctl(PChar(@mib), 3, nil, @len, NIL, 0) <> -1) then begin     
        if (len > 0) then begin
            kp := StrAlloc(len);
            // Le second appel récupère les infos disponibles
            if (sysctl.FPsysctl(PChar(@mib), 3, kp, @len, NIL, 0) <> -1) then begin    
 
                // Structure kp bien remplie mais comment retrouver mes petits ? 
 
            end;
            strdispose(kp);
        end;
     end;
end;

Le code fonctionne, si je bidouille en lisant kp caractère par caractère, je retouve bien des noms de processus ça et là. Ce kp est censé avoir cette structure:

Code :

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struct kinfo_proc {
	struct	extern_proc kp_proc;			/* proc structure */
	struct	eproc {
		struct	proc *e_paddr;		/* address of proc */
		struct	session *e_sess;	/* session pointer */
		struct	_pcred e_pcred;		/* process credentials */
		struct	_ucred e_ucred;		/* current credentials */
		struct	 vmspace e_vm;		/* address space */
		pid_t	e_ppid;			/* parent process id */
		pid_t	e_pgid;			/* process group id */
		short	e_jobc;			/* job control counter */
		dev_t	e_tdev;			/* controlling tty dev */
		pid_t	e_tpgid;		/* tty process group id */
		struct	session *e_tsess;	/* tty session pointer */
#define	WMESGLEN	7
		char	e_wmesg[WMESGLEN+1];	/* wchan message */
		segsz_t e_xsize;		/* text size */
		short	e_xrssize;		/* text rss */
		short	e_xccount;		/* text references */
		short	e_xswrss;
		int32_t	e_flag;
#define	EPROC_CTTY	0x01	/* controlling tty vnode active */
#define	EPROC_SLEADER	0x02	/* session leader */
#define	COMAPT_MAXLOGNAME	12
		char	e_login[COMAPT_MAXLOGNAME];	/* short setlogin() name */
		int32_t	e_spare[4];
	} kp_eproc;
};

avec extern_proc défini ainsi:

Code :

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struct extern_proc {
	union {
		struct {
			struct	proc *__p_forw;	/* Doubly-linked run/sleep queue. */
			struct	proc *__p_back;
		} p_st1;
		struct timeval __p_starttime; 	/* process start time */
	} p_un;
#define p_forw p_un.p_st1.__p_forw
#define p_back p_un.p_st1.__p_back
#define p_starttime p_un.__p_starttime
	struct	vmspace *p_vmspace;	/* Address space. */
	struct	sigacts *p_sigacts;	/* Signal actions, state (PROC ONLY). */
	int	p_flag;			/* P_* flags. */
	char	p_stat;			/* S* process status. */
	pid_t	p_pid;			/* Process identifier. */
	pid_t	p_oppid;	 /* Save parent pid during ptrace. XXX */
	int	p_dupfd;	 /* Sideways return value from fdopen. XXX */
	/* Mach related  */
	caddr_t user_stack;	/* where user stack was allocated */
	void	*exit_thread;	/* XXX Which thread is exiting? */
	int		p_debugger;		/* allow to debug */
	boolean_t	sigwait;	/* indication to suspend */
	/* scheduling */
	u_int	p_estcpu;	 /* Time averaged value of p_cpticks. */
	int	p_cpticks;	 /* Ticks of cpu time. */
	fixpt_t	p_pctcpu;	 /* %cpu for this process during p_swtime */
	void	*p_wchan;	 /* Sleep address. */
	char	*p_wmesg;	 /* Reason for sleep. */
	u_int	p_swtime;	 /* Time swapped in or out. */
	u_int	p_slptime;	 /* Time since last blocked. */
	struct	itimerval p_realtimer;	/* Alarm timer. */
	struct	timeval p_rtime;	/* Real time. */
	u_quad_t p_uticks;		/* Statclock hits in user mode. */
	u_quad_t p_sticks;		/* Statclock hits in system mode. */
	u_quad_t p_iticks;		/* Statclock hits processing intr. */
	int	p_traceflag;		/* Kernel trace points. */
	struct	vnode *p_tracep;	/* Trace to vnode. */
	int	p_siglist;		/* DEPRECATED */
	struct	vnode *p_textvp;	/* Vnode of executable. */
	int	p_holdcnt;		/* If non-zero, don't swap. */
	sigset_t p_sigmask;	/* DEPRECATED. */
	sigset_t p_sigignore;	/* Signals being ignored. */
	sigset_t p_sigcatch;	/* Signals being caught by user. */
	u_char	p_priority;	/* Process priority. */
	u_char	p_usrpri;	/* User-priority based on p_cpu and p_nice. */
	char	p_nice;		/* Process "nice" value. */
	char	p_comm[MAXCOMLEN+1];
	struct 	pgrp *p_pgrp;	/* Pointer to process group. */
	struct	user *p_addr;	/* Kernel virtual addr of u-area (PROC ONLY). */
	u_short	p_xstat;	/* Exit status for wait; also stop signal. */
	u_short	p_acflag;	/* Accounting flags. */
	struct	rusage *p_ru;	/* Exit information. XXX */
};

Le C n'étant pas ma tasse de thé... comment je m'y retrouve pour récupérer proprement le nom des processus dans un kp de type kinfo_proc ...

Merci,
André.

**M.Dlb** · 04/05/2010, 15h58

Il suffit de voir à quelle offset dans le PChar kp commence le nom du processus. Si tu postes un dump en hexa de kp, on devrait pouvoir t'aider à voir quel est le champ correspondant. Attention à l'alignement mémoire quand on dépiote ce genre de structure

**sinfoni** · 04/05/2010, 18h00

Ok. Là je suis parti en déplacement. Je post un dump demain dans la matinée

**sinfoni** · 05/05/2010, 09h50

Pas sûr que ça aide vraiment...

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**M.Dlb** · 05/05/2010, 11h13

Effectivement, ca aide pas trop

Sinon selon cette doc, le paramètre qui contient le nom est p_comm de extern_proc:

http://developer.apple.com/mac/libra...01/qa1123.html

**sinfoni** · 05/05/2010, 11h15

Tout à fait, je suis parti de cette doc pour faire le programme Delphi. Mais sans la structure convertie en Delphi, je ne suis pas plus avancé. Bon, maintenant ça fonctionne : Je ne traite que les caractères imprimable et à priori, je connais le nom du processus que je cherche, mais c'est pas très propre...

[Mac OS X] Liste des processus via sysctl

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