37 lines
801 B
Bash
37 lines
801 B
Bash
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#!/bin/sh
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NUM=0
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QUEUE=""
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MAX_NPROC=12
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while read CMD; do
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sh -c "$CMD" &
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PID=$!
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QUEUE="$QUEUE $PID"
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NUM=$(($NUM+1))
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# if enough processes were created
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while [ $NUM -ge $MAX_NPROC ]; do
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# check whether any process finished
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for PID in $QUEUE; do
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if [ ! -d /proc/$PID ]; then
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TMPQUEUE=$QUEUE
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QUEUE=""
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NUM=0
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# rebuild new queue from processes
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# that are still alive
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for PID in $TMPQUEUE; do
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if [ -d /proc/$PID ]; then
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QUEUE="$QUEUE $PID"
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NUM=$(($NUM+1))
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fi
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done
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break
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fi
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done
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sleep 0.5
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done
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done
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wait
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