Linux exec方法族简单用法-优快云博客

本文详细介绍了C语言中用于执行文件的六个进程控制函数：execl、execlp、execle、execv、execvp和execve。这些函数允许程序替换当前进程映像，并通过不同的参数传递方式提供灵活性。

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[]);

execl("/bin/ls", "-al", (char*)0);

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   char *envp[] = {"-al", "."};
 execle("/bin/ls","ls",  NULL, envp);

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execlp("ls", "ls", "-l", ".", NULL );

-----------------------------------------

char*evnp[] = {"ls", "-al", NULL};
execvp("ls", evnp);
--------------------------------------------------------------------------

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

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