execl

Caicloud 2023-04-25 09:56 回答0 收藏1

问题描述：execl

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shleyZ

回答于2023-04-25 09:56

`execl` is a function in the C programming language that is used to replace the current process image with a new process image. The `execl` function is a member of the `exec` family of functions, which are used to execute a new process. The `execl` function specifically takes a path to an executable file as its first argument, followed by a list of arguments that will be passed to the new process. The last argument must be a NULL pointer. Here is the syntax for `execl` function:

int execl(const char *path, const char *arg0, const char *arg1, ..., const char *argn, (char *)0);

The first argument `path` specifies the path of the file to be executed. The remaining arguments `arg0`, `arg1`, and so on, represent the command-line arguments that will be passed to the new process. Upon successful execution of `execl`, the current process is replaced by the new process, and control is not returned to the calling process unless an error occurs. If an error occurs, the function returns -1. Note that the `execl` function replaces the current process image with the new process image, and as a result, the current process"s resources, such as open files and shared memory, are lost.