ps_sun.c

进程列表程序

#define _KMEMUSER
#include <sys/proc.h>
#include <kvm.h>
#include <fcntl.h>
 
char regexpstr[256];
#define INIT            register char *sp=regexpstr;
#define GETC()          (*sp++)
#define PEEKC()         (*sp)
#define UNGETC(c)       (--sp)
#define RETURN(pointer) return(pointer);
#define ERROR(val)
#include <regexp.h>
 
pid_t
getpidbyname(char *name,pid_t skipit)
{
    kvm_t *kd;
    char **arg;
    int error;
    char *p_name=NULL;
    char expbuf[256];
    char **freeme;
    int curpid;
    struct user * cur_user;
    struct user myuser;
    struct proc * cur_proc;
 
 
    if((kd=kvm_open(NULL,NULL,NULL,O_RDONLY,NULL))==NULL){
        return(-1);
    }
    sprintf(regexpstr,"^.*/%s$",name);
    compile(NULL,expbuf,expbuf+256,'\0');
 
    while(cur_proc=kvm_nextproc(kd)){
        curpid = cur_proc->p_pid;
        if((cur_user=kvm_getu(kd,cur_proc))!=NULL){
            error=kvm_getcmd(kd,cur_proc,cur_user,&arg,NULL);
            if(error==-1){
                if(cur_user->u_comm[0]!='\0'){
                    p_name=cur_user->u_comm;
                }
            }
            else{
                p_name=arg[0];
            }
        }
        if(p_name){
            if(!strcmp(p_name,name)){
                if(error!=-1){
                    free(arg);
                }
                if(skipit!=-1 && ourretval==skipit){
                    ourretval=-1;
                }
                else{
                    close(fd);
                    break;
                }
                break;
            }
            else{
                if(step(p_name,expbuf)){
                    if(error!=-1){
                        free(arg);
                    }
                    break;
                }
            }
        }
        if(error!=-1){
            free(arg);
        }
        p_name=NULL;
    }
    kvm_close(kd);
    if(p_name!=NULL){
        return(curpid);
    }
    return (-1);
}