shellinabox笔记1----prctl
prctl给线程命名和线程的一些操作注意这里命名线程名称为xx
#include <stdlib.h>#include <stdio.h>#include <pthread.h>#include <sys/prctl.h>void* test(void *arg) { char name; prctl(PR_SET_NAME, (unsigned long)"xx"); prctl(PR_GET_NAME, (unsigned long)name); printf("%s/n", name); while (1) sleep(1); } int main(void) { pthread_t tid; pthread_create(&tid, NULL, test, NULL); pthread_join(tid, NULL); return 0; }
编译并运行：
gcc prctl.c -l pthread
./a.out
在另一个终端，通过ps找到a.out的pid：
# ps -ef|grep a.ouroot 976488700 12:43 pts/2 00:00:00 ./a.outroot 976897470 12:43 pts/4 00:00:00 grep a.ou# cd /proc/9764# cd task/# ls97649765# pwd/proc/9764/task# cd 9765/# lsattr clear_refscwd fd limits mem numa_mapsoom_score_adjroot sessionidstat syscallauxv cmdline environfdinfologinuidmountinfooom_adj pagemap sched smaps statm wchancgroupcpuset exe io maps mounts oom_scorepersonality schedstatstack status# cat cmdline ./a.out#
看命名是否奏效：
两个task的名字都是a.out
看线程名字用,线程的名字“xx”在这
# ps -L -p 9764
PID LWP TTY TIME CMD
97649764 pts/2 00:00:00 a.out
97649765 pts/2 00:00:00 xx
#
-----------------------------------------------------------
stat文件和status文件中也有
# cat stat
9764 (a.out) S 8870 9764 8870 34818 9764 4202496 172 0 0 0 0 0 0 0 20 0 2 0 176577389 16850944 136 18446744073709551615 4194304 4196556 140734883346416 140734883346080 255523324077 0 0 0 0 18446744071579515721 0 0 17 3 0 0 0 0 0
# cd -
/proc/9764/task
# cd -
/proc/9764/task/9764
# cd ../9765/
# cat stat
9765 (xx) S 8870 9764 8870 34818 9764 4202560 17 0 0 0 0 0 0 0 20 0 2 0 176577389 16850944 136 18446744073709551615 4194304 4196556 140734883346416 140599854898320 255519799581 0 0 0 0 18446744071579464804 0 0 -1 0 0 0 0 0 0
# cat status
Name:xx
State:S (sleeping)
Tgid:9764
Pid:9765
PPid:8870
TracerPid:0
Uid:0000
Gid:0000
Utrace:0
FDSize:256
Groups:0
VmPeak: 16456 kB
VmSize: 16456 kB
VmLck: 0 kB
VmHWM: 544 kB
VmRSS: 544 kB
VmData: 10440 kB
VmStk: 88 kB
VmExe: 4 kB
VmLib: 1792 kB
VmPTE: 44 kB
VmSwap: 0 kB
Threads:2
SigQ:1/62815
SigPnd:0000000000000000
ShdPnd:0000000000000000
SigBlk:0000000000000000
SigIgn:0000000000000000
SigCgt:0000000180000000
CapInh:0000000000000000
CapPrm:ffffffffffffffff
参考
http://www.cnblogs.com/sunyubo/archive/2010/12/10/2282086.html
这个头文件不全
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