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 º¯ÊýÔ­ÐÍ  Pid_t getpid(void) Pid_t getppid(void) 
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 #include<stdio.h>
#include<unistd.h>
int main()
{
   printf("ϵͳ·ÖÅäµÄ½ø³ÌºÅÊÇ£º%d\n",getpid());
   printf("ϵͳ·ÖÅäµÄ¸¸½ø³ÌºÅÊÇ£º%d\n",getppid());
   return 0;
}
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 Í·Îļþ  #include<unistd.h>
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int execl(const chat *path,const char *args,...)
int execv(const char *path,char const *argv[])
int execle(const cahr *path,const char *arg,...,char *const envp[])
int execve(const char *path,char *const argv[],char *const envp[])
int execlp(const char *file,char *arg,...)
int execvp(const cahr *file,char *const argv[])
 
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#include<stdio.h>
#include<unistd>
int main()
{
   char *args[]={"/usr/bin/vim",NULL};
   printf("ϵͳ·ÖÅäµÄ½ø³ÌºÅÊÇ£º%d\n",getpid());
   if(execve("/usr/bin/vim",args,NULL)<0)
     perror("´´½¨½ø³Ì³ö´í£¡");
    return 0;
}
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