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util.c File Reference

Functions
char*	alloca ()
RETSIGTYPE	signalHandler (int sig)
	Signal handler to set shutdown flag. More...
char*	ip2str (u_int32 ip)
	Gets the string representation of a given IP address. More...
void	executeCmd (char *cmd,...)
	Executes a system command with the given parameters. More...
pid_t	daemonize ()
	Make the current process a daemon. More...
void	setSignals (int *fShutdown)
	Catches SIGTERM and SIGINT. More...
Variables
int*	fShutdownp = NULL
	Pointer to the shutdown flag.

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Function Documentation

char* alloca ( )

pid_t daemonize ( )

Make the current process a daemon. Forks off and closes all files. Returns: 0 on the daemon, pid on the parent (which exists) and -1 on error.

void executeCmd ( char * cmd, ... )

Executes a system command with the given parameters. This function is just a wrapper arround fork/execv that forks and executes the given command. The full path to the command is <libexecdir>/wccpd/cmd. It will wait for the command to complete before it returns. The variable length char* parameter list must be NULL terminated, and must not exceed MAX_CMDEXEC_ARGS parameters (not including neither the command name nor the trailing NULL). Parameters: cmd   the command to execute.

char * ip2str ( u_int32 ip )

Gets the string representation of a given IP address. This function uses a statically allocated buffer, thus each call overwrites the previous call's result. Parameters: ip   the IP address to convert, in Network Byte Order. Returns: the quad-dot notation string of the given ip.

void setSignals ( int * fShutdown )

Catches SIGTERM and SIGINT. Each time one of the signals is received, the integer pointed to by fShutdown is incremented. Parameters: fShutdown   a pointer to an integer to be incremented.

RETSIGTYPE signalHandler ( int sig ) [static]

Signal handler to set shutdown flag. This signal handler just increments the variable pointed by fShutdownp, if non-NULL. Parameters: sig   the signal that was triggered.

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Variable Documentation

int* fShutdownp = NULL [static]

Pointer to the shutdown flag.

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