使用fork() +execv() 遇到问题 请各位帮忙 ??
还是先看一下代码吧!!int my_exec(char **cmd,int flag)
{
int status = 0;
int pid = 0;
if((pid=fork())==0){
execv(cmd,cmd);
fprintf(stderr,"execv():%s .\n",strerror(errno));
exit(errno);
//child !
}
else if(pid == -1 ){ ///error .
fprintf(stderr,"fork():%s \n",strerror(errno));
return pid;
}
if(flag == 0){//father
waitpid(pid,&status, WNOHANG);
return WEXITSTATUS(status);
}
else if (flag == 1 )
return pid;
return (!0);
}
void handler()
{
FILE *fd = NULL;
char *fpath ="/proc/net/dev";
ppp *p = NULL;
char *stt = NULL;
char *cmd[]={"/home/codes/script/pppoecount.sh",username,"8",NULL};
alarm(2);
fd= fopen (fpath, "r" );
if(!fd){
g_print("Can't fopen(): %s :%s\n",fpath,strerror(errno));
return;
}
//g_print("come to handler for alarm .\n");
p = get_ppps(fd);
stt = sprint_ppp(p);
if(g_strrstr(stt,"eth"))t_sec+=2;
else t_sec = 0;
sprintf(&stt,"ppp time: %ld:%ld:%ld.\n",t_sec/(3600),(t_sec/60)%60,t_sec%60);
if(label)gtk_label_set_text(GTK_LABEL(label),stt);
free_ppp(p);
////////////////////// 只能这样做标记了
if(t_sec%8==0my_exec(cmd,1);
/////////////////////
if(fd)fclose(fd);
}
handler 在一个 程序 调用多次后:
$ps aux
root 197480.00.0 0 0 pts/2 Z 22:21 0:00 <defunct>
root 197550.00.0 0 0 pts/2 Z 22:21 0:00 <defunct>
root 197610.00.0 0 0 pts/2 Z 22:21 0:00 <defunct>
root 197670.00.0 0 0 pts/2 Z 22:21 0:00 <defunct>
root 197730.00.0 0 0 pts/2 Z 22:21 0:00 <defunct>
root 197790.00.0 0 0 pts/2 Z 22:22 0:00 <defunct>
root 197850.00.0 0 0 pts/2 Z 22:22 0:00 <defunct>
root 197910.00.0 0 0 pts/2 Z 22:22 0:00 <defunct>
root 197970.00.0 0 0 pts/2 Z 22:22 0:00 <defunct>
root 198030.00.0 0 0 pts/2 Z 22:22 0:00 <defunct>
root 198090.00.0 0 0 pts/2 Z 22:22 0:00 <defunct>
root 198150.00.0 0 0 pts/2 Z 22:22 0:00 <defunct>
root 198210.00.0 0 0 pts/2 Z 22:23 0:00 <defunct>
root 198270.00.0 0 0 pts/2 Z 22:23 0:00 <defunct>
root 198350.00.0 0 0 pts/2 Z 22:23 0:00 <defunct>
root 198410.00.0 0 0 pts/2 Z 22:23 0:00 <defunct>
root 198470.00.0 0 0 pts/2 Z 22:23 0:00 <defunct>
root 198530.00.0 0 0 pts/2 Z 22:23 0:00 <defunct>
root 198590.00.0 0 0 pts/2 Z 22:23 0:00 <defunct>
root 198650.00.0 0 0 pts/2 Z 22:23 0:00 <defunct>
root 198710.00.0 0 0 pts/2 Z 22:24 0:00 <defunct>
root 198770.00.0 0 0 pts/2 Z 22:24 0:00 <defunct>
root 198840.00.0 0 0 pts/2 Z 22:24 0:00 <defunct>
root 198900.00.0 0 0 pts/2 Z 22:24 0:00 <defunct>
root 198960.00.0 0 0 pts/2 Z 22:24 0:00 <defunct>
root 199020.00.0 0 0 pts/2 Z 22:24 0:00 <defunct>
root 199080.00.0 0 0 pts/2 Z 22:24 0:00 <defunct>
root 199140.00.0 0 0 pts/2 Z 22:25 0:00 <defunct>
root 199200.00.0 0 0 pts/2 Z 22:25 0:00 <defunct>
root 199260.00.0 0 0 pts/2 Z 22:25 0:00 <defunct>
root 199320.00.0 0 0 pts/2 Z 22:25 0:00 <defunct>
root 199380.00.0 0 0 pts/2 Z 22:25 0:00 <defunct>
root 199440.00.0 0 0 pts/2 Z 22:25 0:00 <defunct>
root 199500.00.0 0 0 pts/2 Z 22:25 0:00 <defunct>
root 199560.00.0 0 0 pts/2 Z 22:25 0:00 <defunct>
root 199620.00.0 0 0 pts/2 Z 22:26 0:00 <defunct>
root 199680.00.0 0 0 pts/2 Z 22:26 0:00 <defunct>
root 199740.00.0 0 0 pts/2 Z 22:26 0:00 <defunct>
root 199800.00.0 0 0 pts/2 Z 22:26 0:00 <defunct>
root 199860.00.0 0 0 pts/2 Z 22:26 0:00 <defunct>
root 199920.00.0 0 0 pts/2 Z 22:26 0:00 <defunct>
root 199980.00.0 0 0 pts/2 Z 22:26 0:00 <defunct>
linux 200051.35.340952 13676 pts/1 SL+22:26 0:00 mplayer -ao alsa -vo null /media/hdb5/music/ha
root 200060.00.0 0 0 pts/2 Z 22:27 0:00 <defunct>
root 200120.00.0 0 0 pts/2 Z 22:27 0:00 <defunct>
root 200180.00.0 0 0 pts/2 Z 22:27 0:00 <defunct>
root 200240.00.0 0 0 pts/2 Z 22:27 0:00 <defunct>
linux 200300.00.3 58041028 pts/4 R+ 22:27 0:00 ps aux
脚本都运行结束了啊!!
<defunct> 为什么还在啊??
当然如果程序关闭, <defunct> 就没有了!
这个东西有点烦人,恳请有人能帮我把它弄掉??
[ 本帖最后由 wkt 于 2008-1-6 11:50 编辑 ] oh,著名的僵尸进程。
在程序中ignore掉SIGCHLD即可。
Regards
PowerGUI
---------------------------------
开放手机联盟 Android中文社区(Google手机操作系统)
http://www.openhandsetalliance.org.cn 原帖由 PoewerGUI 于 2008-1-6 18:43 发表 http://www.linuxfans.org/bbs/images/common/back.gif
oh,著名的僵尸进程。
在程序中ignore掉SIGCHLD即可。
很有效多谢了!!
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