HPUX系统列举进程信息

初衷：写了一个库，提供给其他人调用，在出错的时候写日记想把进程信息（主要是进程名，运行参数等）记录下来，忘了怎么做了（除了传入argv[0]和通过pipe调ps之外）。bs下自己，居然连pstat系列函数都忘了，还到CU去发帖问。

在HPUX上可以用pstat系列函数，可以查到大量的系统信息。在linux上可以查/proc下的文件。

这是HPUX上查进程名代码

void getprocinfo()
{
   int r;
    struct pst_status buf;
    r   = pstat_getproc(&buf,sizeof(buf),0,getpid());//指定getpid和elemcount=0查当前进程
   if(r<0)
 {
        printf("get proc error %d/n",errno);
        return ;
   }
   printf("/n/n------------------------------------------------------------------------------");
   printf("/n %5s | %5s |%7s| %5s | %s", "PID", "UID", "Threads", "RSS", "Command");
   printf("/n------------------------------------------------------------------------------");
   printf("/n %5ld | ", buf.pst_pid);
   printf("%5ld | ", buf.pst_uid);
   printf("%5ld | ", buf.pst_nlwps);
   printf("%5ld | ", buf.pst_rssize);
   printf("%s/n ", buf.pst_cmd);
}

其中pst_status结构定义在/usr/include/sys/pm_pstat_body.h,有巨多的信息
列出所有进程：

void listproc()
{
  struct pst_status * psa = NULL;  
  struct pst_status * prc = NULL;   
  struct pst_dynamic  psd;
  long                nproc = 0;     
  long                thsum = 0;      
  long                i;               
 
  if ( pstat_getdynamic(&psd, sizeof(psd), 1, 0) == -1 )
    (void)perror("pstat_getdynamic failed");
 
  // Get the number of active processes from pst_dynamic
  nproc  = psd.psd_activeprocs; 
  psa    = (struct pst_status *)malloc(nproc * sizeof(struct pst_status));
 
  // Read the info about the active processes into the array 'psa'
  if ( pstat_getproc(psa, sizeof(struct pst_status), nproc, 0) == -1 )
    (void)perror("pstat_getproc failed");
 
  (void)printf("/n/n------------------------------------------------------------------------------");
  (void)printf("/n %5s | %5s | %10s |%7s| %5s | %5s| %5s|%s", "PID", "UID","UNAME", "Threads", "RSS", "Command");
  (void)printf("/n------------------------------------------------------------------------------");
 
  // Report the process info as required
  prc = (struct pst_status *)psa;      
    int uid  =getuid();
  for (i=0; i < nproc; i++)
  {
    printf("/n %5ld | ", prc->pst_pid);
    printf("%5ld | ", prc->pst_uid);
    printf(" %10s |",getpwuid(prc->pst_uid)->pw_name);
    printf("%5ld | ", prc->pst_nlwps);
    printf("%5ld | ", prc->pst_rssize);
    printf("%s ", prc->pst_cmd);
    thsum += prc->pst_nlwps;
    ++prc;        
  }
 
  (void)printf("/n/n*** %ld processes, %ld threads running/n/n", nproc, thsum);
  (void)free(psa);    
}