Linux exec方法族简单用法

MAN (Manual pager utils) :
execl, execlp, execle, execv, execvp ，execve- execute a file

#include <unistd.h>

extern char **environ;

int execl(const char *path, const char *arg, ...);

int execlp(const char *file, const char *arg, ...);

int execle(const char *path, const char *arg, ..., char * const envp[]);

int execv(const char *path, char *const argv[]);

int execvp(const char *file, char *const argv[]);

int execve(const char *filename, char *const argv[], char *const envp[]);

char*argv[] ={"ls", "-l",".", NULL};char*envp[] ={ NULL};execve("/bin/ls", argv, envp);