MTD 248-645A Manual de usuario descargar pdf (Pagina 281)

Linux From Scratch - Version 7.0

261

{

echo -n -e "${@}"

echo -n -e "${@}" >> ${BOOTLOG}

return 0

}

################################################################################

# evaluate_retval() #

# Usage: Evaluate a return value and print success or failyure as appropriate #

# #

# Purpose: Convenience function to terminate an info message #

# #

# Return values: Not used #

################################################################################

evaluate_retval()

{

local error_value="${?}"

if [ ${error_value} = 0 ]; then

log_success_msg2

else

log_failure_msg2

}

################################################################################

# check_signal() #

# Usage: check_signal [ -{signal} | {signal} ] #

# #

# Purpose: Check for a valid signal. This is not defined by any LSB draft, #

# however, it is required to check the signals to determine if the #

# signals chosen are invalid arguments to the other functions. #

# #

# Inputs: Accepts a single string value in the form or -{signal} or {signal} #

# #

# Return values: #

# 0 - Success (signal is valid #

# 1 - Signal is not valid #

################################################################################

check_signal()

{

local valsig

# Add error handling for invalid signals

valsig="-ALRM -HUP -INT -KILL -PIPE -POLL -PROF -TERM -USR1 -USR2"

valsig="${valsig} -VTALRM -STKFLT -PWR -WINCH -CHLD -URG -TSTP -TTIN"

valsig="${valsig} -TTOU -STOP -CONT -ABRT -FPE -ILL -QUIT -SEGV -TRAP"

valsig="${valsig} -SYS -EMT -BUS -XCPU -XFSZ -0 -1 -2 -3 -4 -5 -6 -8 -9"

valsig="${valsig} -11 -13 -14 -15"

echo "${valsig}" | grep -- " ${1} " > /dev/null

if [ "${?}" -eq "0" ]; then

return 0

else

return 1

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