Linux下C语言修改进程名称的方法
本文实例讲述了Linux下C语言修改进程名称的方法。分享给大家供大家参考。具体如下：
#include<stdio.h>
#include<string.h>
#include"./util/setproctitle.c"
//externchar**environ;
//intmain(intargc,char*argv[])
//{
//inti;
//printf("argc:%d\n",argc);
//for(i=0;i<argc;++i){
//printf("0x%x\n",argv[i]);
//printf("argv[%d]:%s\n",i,argv[i]);
//}
//printf("evriron=%x\n",environ[0]);
//return0;
//}
intmain(intargc,char**argv){
spt_init(argc,argv);
setproctitle("设置进程名为:thisisatest");
sleep(1000);
return0;
}
setproctitle.c文件如下：
/*==========================================================================
*setproctitle.c-Linux/Darwinsetproctitle.
*--------------------------------------------------------------------------
*Copyright(C)2010WilliamAhern
*Copyright(C)2013SalvatoreSanfilippo
*Copyright(C)2013StamHe
*
*Permissionisherebygranted,freeofcharge,toanypersonobtaininga
*copyofthissoftwareandassociateddocumentationfiles(the
*"Software"),todealintheSoftwarewithoutrestriction,including
*withoutlimitationtherightstouse,copy,modify,merge,publish,
*distribute,sublicense,and/orsellcopiesoftheSoftware,andtopermit
*personstowhomtheSoftwareisfurnishedtodoso,subjecttothe
*followingconditions:
*
*Theabovecopyrightnoticeandthispermissionnoticeshallbeincluded
*inallcopiesorsubstantialportionsoftheSoftware.
*
*THESOFTWAREISPROVIDED"ASIS",WITHOUTWARRANTYOFANYKIND,EXPRESS
*ORIMPLIED,INCLUDINGBUTNOTLIMITEDTOTHEWARRANTIESOF
*MERCHANTABILITY,FITNESSFORAPARTICULARPURPOSEANDNONINFRINGEMENT.IN
*NOEVENTSHALLTHEAUTHORSORCOPYRIGHTHOLDERSBELIABLEFORANYCLAIM,
*DAMAGESOROTHERLIABILITY,WHETHERINANACTIONOFCONTRACT,TORTOR
*OTHERWISE,ARISINGFROM,OUTOFORINCONNECTIONWITHTHESOFTWAREORTHE
*USEOROTHERDEALINGSINTHESOFTWARE.
*==========================================================================
*/
#ifndef_GNU_SOURCE
#define_GNU_SOURCE
#endif
#include<stddef.h>/*NULLsize_t*/
#include<stdarg.h>/*va_listva_startva_end*/
#include<stdlib.h>/*malloc(3)setenv(3)clearenv(3)setproctitle(3)getprogname(3)*/
#include<stdio.h>/*vsnprintf(3)snprintf(3)*/
#include<string.h>/*strlen(3)strchr(3)strdup(3)memset(3)memcpy(3)*/
#include<errno.h>/*errnoprogram_invocation_nameprogram_invocation_short_name*/
#if!defined(HAVE_SETPROCTITLE)
#defineHAVE_SETPROCTITLE(defined__NetBSD__||defined__FreeBSD__||defined__OpenBSD__)
#endif
#if!HAVE_SETPROCTITLE
#if(defined__linux||defined__APPLE__)
externchar**environ;
staticstruct{
/*originalvalue*/
constchar*arg0;
/*titlespaceavailable*/
char*base,*end;
/*pointertooriginalnulcharacterwithinbase*/
char*nul;
_Boolreset;
interror;
}SPT;
#ifndefSPT_MIN
#defineSPT_MIN(a,b)(((a)<(b))?(a):(b))
#endif
staticinlinesize_tspt_min(size_ta,size_tb);
staticintspt_clearenv(void);
staticintspt_copyenv(char*oldenv[]);
staticintspt_copyargs(intargc,char*argv[]);
voidspt_init(intargc,char*argv[]);
voidsetproctitle(constchar*fmt,...);
staticinlinesize_tspt_min(size_ta,size_tb){
returnSPT_MIN(a,b);
}/*spt_min()*/
/*
*Fordiscussionontheportabilityofthevariousmethods,see
*http://lists.freebsd.org/pipermail/freebsd-stable/2008-June/043136.html
*/
staticintspt_clearenv(void){
#if__GLIBC__
clearenv();
return0;
#else
externchar**environ;
staticchar**tmp;
if(!(tmp=malloc(sizeof*tmp)))
returnerrno;
tmp[0]=NULL;
environ=tmp;
return0;
#endif
}/*spt_clearenv()*/
staticintspt_copyenv(char*oldenv[]){
externchar**environ;
char*eq;
inti,error;
if(environ!=oldenv)
return0;
if((error=spt_clearenv()))
gotoerror;
for(i=0;oldenv[i];i++){
if(!(eq=strchr(oldenv[i],'=')))
continue;
*eq='\0';
error=(0!=setenv(oldenv[i],eq+1,1))?errno:0;
*eq='=';
if(error)
gotoerror;
}
return0;
error:
environ=oldenv;
returnerror;
}/*spt_copyenv()*/
staticintspt_copyargs(intargc,char*argv[]){
char*tmp;
inti;
for(i=1;i<argc||(i>=argc&&argv[i]);i++){
if(!argv[i])
continue;
if(!(tmp=strdup(argv[i])))
returnerrno;
argv[i]=tmp;
}
return0;
}/*spt_copyargs()*/
voidspt_init(intargc,char*argv[]){
char**envp=environ;
char*base,*end,*nul,*tmp;
inti,error;
if(!(base=argv[0]))
return;
nul=&base[strlen(base)];
end=nul+1;
for(i=0;i<argc||(i>=argc&&argv[i]);i++){
if(!argv[i]||argv[i]<end)
continue;
end=argv[i]+strlen(argv[i])+1;
}
for(i=0;envp[i];i++){
if(envp[i]<end)
continue;
end=envp[i]+strlen(envp[i])+1;
}
if(!(SPT.arg0=strdup(argv[0])))
gotosyerr;
if((error=spt_copyenv(envp)))
gotoerror;
if((error=spt_copyargs(argc,argv)))
gotoerror;
SPT.nul=nul;
SPT.base=base;
SPT.end=end;
return;
syerr:
error=errno;
error:
SPT.error=error;
}/*spt_init()*/
#ifndefSPT_MAXTITLE
#defineSPT_MAXTITLE255
#endif
voidsetproctitle(constchar*fmt,...){
charbuf[SPT_MAXTITLE+1];/*usebufferincaseargv[0]ispassed*/
va_listap;
char*nul;
intlen,error;
if(!SPT.base)
return;
if(fmt){
va_start(ap,fmt);
len=vsnprintf(buf,sizeofbuf,fmt,ap);
va_end(ap);
}else{
len=snprintf(buf,sizeofbuf,"%s",SPT.arg0);
}
if(len<=0)
{error=errno;gotoerror;}
if(!SPT.reset){
memset(SPT.base,0,SPT.end-SPT.base);
SPT.reset=1;
}else{
memset(SPT.base,0,spt_min(sizeofbuf,SPT.end-SPT.base));
}
len=spt_min(len,spt_min(sizeofbuf,SPT.end-SPT.base)-1);
memcpy(SPT.base,buf,len);
nul=&SPT.base[len];
if(nul<SPT.nul){
*SPT.nul='.';
}elseif(nul==SPT.nul&&&nul[1]<SPT.end){
*SPT.nul='';
*++nul='\0';
}
return;
error:
SPT.error=error;
}/*setproctitle()*/
#endif/*__linux||__APPLE__*/
#endif/*!HAVE_SETPROCTITLE*/
希望本文所述对大家的C语言程序设计有所帮助。