28、云端与图像处理脚本实用指南

云端与图像处理脚本实用指南

幻灯片展示脚本

幻灯片展示脚本用于从指定目录中显示照片幻灯片，使用了 ImageMagick 的 display 实用程序。以下是脚本代码：

#!/bin/bash
# slideshow--Displays a slide show of photos from the specified directory. 
#   Uses ImageMagick's "display" utility.
delay=2              # Default delay in seconds
psize="1200x900>"    # Preferred image size for display
if [ $# -eq 0 ] ; then
  echo "Usage: $(basename $0) watch-directory" >&2 
  exit 1
fi
watch="$1"
if [ ! -d "$watch" ] ; then
  echo "$(basename $0): Specified directory $watch isn't a directory." >&2
  exit 1
fi
cd "$watch"
if [ $? -ne 0 ] ; then
  echo "$(basename $0): Failed trying to cd into $watch" >&2 
  exit 1
fi
suffixes="$(file * | grep image | cut -d: -f1 | rev |