Call shell commands

Overview

Routines to call shell commands

// global functions

pid_t te_shell_cmd(const char* cmd, uid_t uid, int* in_fd, int* out_fd, int* err_fd);

Detailed Documentation

Routines to call shell commands

Global Functions

pid_t te_shell_cmd(const char* cmd, uid_t uid, int* in_fd, int* out_fd, int* err_fd)

Function to base system()-like and popen()-like functions on it. You MUST use uid parameter instead of “su - user -c”, because su makes one more fork, and you do not know how to kill this grandchild process.

If you use this fuction from agent, this process SHOULD be catched by ta_waitpid() or killed by ta_kill_death().

Parameters:

cmd	command to run in the shell
uid	user id to run the shell; use -1 for default
in_fd	location to store file descriptor of pipe to stdin of the shell command; use NULL for standard stdin
out_fd	location to store file descriptor of pipe to stdout of the shell command; use NULL for standard stdout
err_fd	location to store file descriptor of pipe to stderr of the shell command; use NULL for standard stderr

Returns:

pid value, positive on success, negative on failure