Linux exec函数族

extern char **environ;

int execl(const char* fullpath , const char* arg , ...);
int execlp(const char* file , const char* arg , ...);
int execle(const char* fullpath , const char* arg , ..., char* const envp []);
int execv(const char* fullpath , char* const argv []);
int execvp(const char* file , char* const argv []);  
int execve(const char* fullpath , const char* arg[] , char* const envp []);

int execl(const char* fullpath, const char* arg, ....)
使用范例:execl(“/bin/ls”, ”ls”, ”-al”, NULL)

int execlp(const char* file, const char* arg, ....)
使用范例:execlp(“ls”, ”ls”, ”-al”, NULL)

int execle(const char* fullpath, const char* arg, ...., char* const envp[])
使用范例:execle(“/bin/ls”, ”ls”, ”-al”, NULL, environ)

int execv(const char * fullpath, char* const argv[])
使用范例:execle(“/bin/mkdir”, argv)  // int main(int argc, char* argv[])

char* const p[] = {"a.out" , "testDir", NULL};
execv("/bin/mkdir", p);

int execvp(const char* file, const char* arg, ....)
使用范例:execlp(“ls”, argv)  // int main(int argc, char* argv[])

char* const p[] = {"a.out" , "testDir", NULL};
execvp("mkdir", p);

int execve(const char* fullpath, const char* arg, ...., char* const envp[])
使用范例:execve(“/bin/ls”, argv, environ)

char* const p[] = {"a.out" , "testDir", NULL};
execve("/bin/mkdir", p);

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