[assignments.git] / assgn3 / process-pid.sh

#!/usr/bin/env bash

USAGE="usage: ./process-pid.sh {[-h, -a], [-f, -e] <pid>}, -s <regexp>"

# -h case
if [[ "$1" -eq "-h" ]]; then
	echo "$USAGE"; exit 0 

# <pid> case
elif [[ "$1" =~ ^-?[0-9]+$ ]]; then
	if `ps $1 > /dev/null 2>&1`; then
		echo "you win!"; exit 0

	else
		echo -ne "invalid pid\n$USAGE"; exit 1
	fi

# -e <pid> case
elif [[ "$1" -eq "-e" && "$2" =~ ^-?[0-9]+$ ]]; then
	if `ps $2 > /dev/null 2>&1`; then
		echo "you win!"; exit 0;

	else
		echo -ne "invalid pid\n$USAGE"; exit 1

# -s <pid> <regex> case
elif [[ "$1" -eq "-s" && "$2" =~ ^-?[0-9]+$ ]]; then
	if `ps $2 > /dev/null 2>&1`; then
		echo "you win!"; exit 0;

	else
		echo -ne "invalid pid\n$USAGE"; exit 1

else
	echo "$USAGE"; exit 1
fi
Commit	Line	Data
bfcad051	1	#!/usr/bin/env bash
bfcad051	2
8fbe044c	3	USAGE="usage: ./process-pid.sh {[-h, -a], [-f, -e] <pid>}, -s <regexp>"
8fbe044c	4
259095d5	5	# -h case
	6	if [[ "$1" -eq "-h" ]]; then
	7	echo "$USAGE"; exit 0
8fbe044c	8
259095d5	9	# <pid> case
259095d5	10	elif [[ "$1" =~ ^-?[0-9]+$ ]]; then
8fbe044c	11	if `ps $1 > /dev/null 2>&1`; then
	12	echo "you win!"; exit 0
	13
	14	else
	15	echo -ne "invalid pid\n$USAGE"; exit 1
	16	fi
	17
259095d5	18	# -e <pid> case
	19	elif [[ "$1" -eq "-e" && "$2" =~ ^-?[0-9]+$ ]]; then
	20	if `ps $2 > /dev/null 2>&1`; then
	21	echo "you win!"; exit 0;
	22
	23	else
	24	echo -ne "invalid pid\n$USAGE"; exit 1
	25
	26	# -s <pid> <regex> case
	27	elif [[ "$1" -eq "-s" && "$2" =~ ^-?[0-9]+$ ]]; then
	28	if `ps $2 > /dev/null 2>&1`; then
	29	echo "you win!"; exit 0;
	30
	31	else
	32	echo -ne "invalid pid\n$USAGE"; exit 1
	33
	34	else
	35	echo "$USAGE"; exit 1
bfcad051	36	fi