qsystem.c File Reference

System APIs. More...

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Functions
const char *	qgetenv (const char *envname, const char *defstr)
	Get a system environment variable.
char *	qsyscmd (const char *cmd)
	Run an external command and return its output.

Detailed Description

System APIs.

Definition in file qsystem.c.

Function Documentation

qgetenv()

const char * qgetenv	(	const char *	envname,
		const char *	defstr )

Get a system environment variable.

Parameters

envname	environment variable name.
defstr	default string to return if the variable is not set.

Returns

pointer to the environment variable value, or defstr if not found.

Definition at line 54 of file qsystem.c.

qsyscmd()

char * qsyscmd

(

const char *

cmd

)

Run an external command and return its output.

Parameters

cmd	command string to run.

Returns

allocated string that contains the command output on success, or NULL on failure.

Note

If the command runs successfully but produces no output, this function returns an empty string, not NULL.

Definition at line 71 of file qsystem.c.