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qSystem.c File Reference

System API. More…

Functions
const char *	qSysGetEnv (const char *envname, const char *nullstr)
	Get system environment variable.
char *	qSysCmd (const char *cmd)
	Get the result string of external command execution.
const char *	qDecoderVersion (void)
	Get the version string of qDecoder library.

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Detailed Description

System API.

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Function Documentation

const char* qSysGetEnv	(	const char *	envname,
		const char *	nullstr
	)

Get system environment variable.

Parameters:

	envname	environment name
	nullstr	if not found, return this string

Returns:

a pointer of environment variable

char* qSysCmd

(

const char *

cmd

)

Get the result string of external command execution.

Parameters:

cmd

external command

Returns:

malloced string pointer which contains result if successful, otherwise returns NULL

Note:

If the command does not report result but it is executed successfully, this will returns empty string(not null)

const char* qDecoderVersion

(

void

)

Get the version string of qDecoder library.

Returns:

a pointer of version string

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