{"id":1326,"date":"2024-05-24T11:47:36","date_gmt":"2024-05-24T03:47:36","guid":{"rendered":"https:\/\/www.qiangzhenshuai.com\/?p=1326"},"modified":"2024-05-29T15:03:46","modified_gmt":"2024-05-29T07:03:46","slug":"shell-%e7%89%b9%e6%ae%8a%e6%b5%81%e7%a8%8b%e6%8e%a7%e5%88%b6%e8%af%ad%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/www.qiangzhenshuai.com\/?p=1326","title":{"rendered":"SHELL-\u6d41\u7a0b\u63a7\u5236\u8bed\u53e5"},"content":{"rendered":"

1.\u6d41\u7a0b\u63a7\u5236\u8bed\u53e5<\/h1>\n

Shell\u7a0b\u5e8f\u6216\u8005\u8bf4\u5176\u4ed6\u7684\u7a0b\u5e8f\uff0c\u90fd\u662f\u987a\u5e8f\u6267\u884c\u7684\uff0c\u4e5f\u5c31\u662f\u7b2c\u4e00\u884c\u6267\u884c\u5b8c\u518d\u6267\u884c\u7b2c\u4e8c\u884c\uff0c\u4ee5\u6b64\u7c7b\u63a8\uff0c\u4f9d\u6b21\u6267\u884c\u3002\u800c\u6d41\u7a0b\u63a7\u5236\u8bed\u53e5<\/p>\n

\u5982\uff1aif\u6761\u4ef6\u5224\u65ad\u8bed\u53e5\uff0c\u4f60\u53ea\u6709\u6761\u4ef6\u6210\u7acb\u4e86\uff0c\u624d\u80fd\u591f\u6267\u884c\uff0c\u5426\u5219\u5c31\u4e0d\u6267\u884c\u5176\u4e2d\u7684\u7a0b\u5e8f\uff0c\u8fd9\u5c31\u4f1a\u8df3\u8fc7\u4e00\u4e9b\u6267\u884c\u547d\u4ee4\u3002for \u5faa\u73af\u4e5f\u662f\u6d41\u7a0b\u63a7\u5236\u7c7b\u8bed\u53e5\uff0c\u662f\u91cd\u590d\u6267\u884c\u6307\u5b9a\u6b21\u6570\u7684\u76f8\u540c\u4ee3\u7801\u3002\u9664\u4e86\u4e0a\u9762\u7684\u6761\u4ef6\u5224\u65ad\u8bed\u53e5\u548c\u5faa\u73af\u8bed\u53e5\u5916\uff0c\u8fd8\u6709\u7279\u6b8a\u6d41\u7a0b\u63a7\u5236\u8bed\u53e5\u3002<\/p>\n

\u6bd4\u5982\uff1aexit \u8bed\u53e5\u3001break \u8bed\u53e5\u3001continue \u8bed\u53e5\u3002<\/p>\n

2.exit\u8bed\u53e5<\/h1>\n

\u7cfb\u7edf\u6709\u4e00\u4e2aexit \u547d\u4ee4\uff0c\u7528\u4e8e\u9000\u51fa\u5f53\u524d\u7528\u6237\u7684\u767b\u5f55\u72b6\u6001\u3002exit\u8bed\u53e5\u662f\u7528\u6765\u9000\u51fa\u5f53\u524d\u811a\u672c\u7684\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728Shell\u811a\u672c\u4e2d\uff0c\u53ea\u8981\u78b0\u5230\u4e86exit\u8bed\u53e5\uff0c\u540e\u7eed\u7684\u7a0b\u5e8f\u5c31\u4e0d\u518d\u53ef\u662f\u5728Shell\u811a\u672c\u4e2d\uff0c\u6267\u884c\uff0c\u800c\u76f4\u63a5\u9000\u51fa\u811a\u672c\u3002<\/p>\n

\u8bed\u6cd5\u5982\u4e0b\uff1aexit<\/p>\n

\u5982\u679cexit \u8bed\u53e5\u4e4b\u540e\u5b9a\u4e49\u4e86\u8fd4\u56de\u503c\uff0c\u90a3\u4e48\u8fd9\u4e2a\u811a\u672c\u6267\u884c\u4e4b\u540e\u7684\u8fd4\u56de\u503c\u5c31\u662f\u6211\u4eec\u81ea\u5df1\u5b9a\u4e49\u7684\u8fd4\u56de\u503c\u3002\u53ef\u4ee5\u901a\u8fc7\u67e5\u8be2$?\u8fd9\u4e2a\u53d8\u91cf\uff0c\u6765\u67e5\u770b\u8fd4\u56de\u503c<\/p>\n

\u5982\u679cexit \u8bed\u53e5\u4e4b\u540e\u6ca1\u6709\u5b9a\u4e49\u8fd4\u56de\u503c\uff0c\u811a\u672c\u6267\u884c\u4e4b\u540e\u7684\u8fd4\u56de\u503c\u662f\uff0c\u6267\u884cexit \u8bed\u53e5\u4e4b\u524d\uff0c\u6700\u540e\u6267\u884c\u7684\u4e00\u6761\u547d\u4ee4\u7684\u8fd4\u56de\u503c<\/p>\n

\u6848\u4f8b<\/h4>\n
\n
\n

#!\/bin\/bash<\/p>\n

# \u68c0\u67e5\u7528\u6237\u8f93\u5165\u7684\u6570\u5b57\u662f\u5426\u4e3a\u8d1f\u6570
\ncheck_number() {
\nif [ $1 -lt 0 ]; then
\necho “\u8f93\u5165\u7684\u6570\u5b57\u4e0d\u80fd\u4e3a\u8d1f\u6570\uff01”
\nexit 1 # \u5982\u679c\u8f93\u5165\u7684\u6570\u5b57\u4e3a\u8d1f\u6570\uff0c\u9000\u51fa\u6574\u4e2a\u811a\u672c\u5e76\u8fd4\u56de\u72b6\u6001\u7801 1
\nelse
\necho “\u8f93\u5165\u7684\u6570\u5b57\u662f\u6b63\u6570\uff01”
\nfi
\n}<\/p>\n

# \u83b7\u53d6\u7528\u6237\u8f93\u5165\u7684\u6570\u5b57
\nread -p “\u8bf7\u8f93\u5165\u4e00\u4e2a\u6570\u5b57\uff1a” user_input<\/p>\n

check_number $user_input
\necho “\u811a\u672c\u6267\u884c\u5b8c\u6bd5\uff01”<\/p>\n<\/div>\n<\/div>\n

\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u9996\u5148\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3a\u00a0check_number\u00a0\u7684\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u63a5\u53d7\u4e00\u4e2a\u53c2\u6570\u5e76\u68c0\u67e5\u53c2\u6570\u662f\u5426\u4e3a\u8d1f\u6570\u3002\u5982\u679c\u53c2\u6570\u4e3a\u8d1f\u6570\uff0c\u5219\u8f93\u51fa\u63d0\u793a\u4fe1\u606f\u5e76\u4f7f\u7528\u00a0exit\u00a0\u8bed\u53e5\u9000\u51fa\u6574\u4e2a\u811a\u672c\uff0c\u5e76\u8fd4\u56de\u72b6\u6001\u7801 1\u3002\u5982\u679c\u53c2\u6570\u4e3a\u6b63\u6570\uff0c\u5219\u8f93\u51fa\u76f8\u5e94\u4fe1\u606f\u5e76\u7ee7\u7eed\u6267\u884c\u540e\u7eed\u811a\u672c\u3002<\/p>\n

\u7528\u6237\u8f93\u5165\u4e00\u4e2a\u6570\u5b57\u540e\uff0c\u811a\u672c\u4f1a\u8c03\u7528\u00a0check_number\u00a0\u51fd\u6570\u8fdb\u884c\u68c0\u67e5\uff0c\u5982\u679c\u8f93\u5165\u7684\u6570\u5b57\u4e3a\u8d1f\u6570\uff0c\u811a\u672c\u4f1a\u7acb\u5373\u9000\u51fa\u5e76\u8f93\u51fa\u9519\u8bef\u4fe1\u606f\uff1b\u5982\u679c\u8f93\u5165\u7684\u6570\u5b57\u4e3a\u6b63\u6570\uff0c\u811a\u672c\u4f1a\u6b63\u5e38\u6267\u884c\u5e76\u8f93\u51fa “\u811a\u672c\u6267\u884c\u5b8c\u6bd5\uff01”\u3002<\/p>\n

3.break\u8bed\u53e5<\/h1>\n

\u7279\u6b8a\u6d41\u7a0b\u63a7\u5236\u8bed\u53e5 break \u8bed\u53e5\u7684\u4f5c\u7528\uff0c\u5f53\u7a0b\u5e8f\u6267\u884c\u5230break \u8bed\u53e5\u65f6\uff0c\u4f1a\u7ed3\u675f\u6574\u4e2a\u5faa\u73af\uff08\u4e5f\u5c31\u662f\u8df3\u51fa\u8fd9\u4e2a\u5faa\u73af\uff0c\u7ee7\u7eed\u4e4b\u540e\u540e\u8fb9\u7684\u547d\u4ee4\uff09<\/p>\n

\u6848\u4f8b<\/h4>\n

[root@shell \/server\/scripts]$ vim break.sh
\n#!\/bin\/bash<\/p>\n

# \u8bbe\u7f6e\u5faa\u73af\u4e0a\u9650
\nmax=5<\/p>\n

echo “\u5f00\u59cb\u5faa\u73af\uff1a”<\/p>\n

# \u4f7f\u7528\u5faa\u73af\u904d\u5386\u6570\u5b57\u5e76\u8f93\u51fa
\nfor ((i=1; i<=$max; i++)); do
\necho “\u5f53\u524d\u6570\u5b57\u662f $i”<\/p>\n

# \u5f53\u6570\u5b57\u4e3a3\u65f6\uff0c\u4f7f\u7528 break \u7ed3\u675f\u5faa\u73af
\nif [ $i -eq 3 ]; then
\necho “\u53d1\u73b0\u6570\u5b573\uff0c\u7ed3\u675f\u5faa\u73af\uff01”
\nbreak
\necho “\u5faa\u73af\u7ed3\u675f\uff01”
\nfi
\ndone<\/p>\n

[root@shell \/server\/scripts]$ sh break.sh
\n\u5f00\u59cb\u5faa\u73af\uff1a
\n\u5f53\u524d\u6570\u5b57\u662f 1
\n\u5f53\u524d\u6570\u5b57\u662f 2
\n\u5f53\u524d\u6570\u5b57\u662f 3
\n\u53d1\u73b0\u6570\u5b573\uff0c\u7ed3\u675f\u5faa\u73af\uff01<\/p>\n

\u533a\u522b<\/h4>\n

[root@shell \/server\/scripts]$ vim break.sh
\n#!\/bin\/bash<\/p>\n

# \u8bbe\u7f6e\u5faa\u73af\u4e0a\u9650
\nmax=5<\/p>\n

echo “\u5f00\u59cb\u5faa\u73af\uff1a”<\/p>\n

# \u4f7f\u7528\u5faa\u73af\u904d\u5386\u6570\u5b57\u5e76\u8f93\u51fa
\nfor ((i=1; i<=$max; i++)); do
\necho “\u5f53\u524d\u6570\u5b57\u662f $i”<\/p>\n

# \u5f53\u6570\u5b57\u4e3a3\u65f6\uff0c\u4f7f\u7528 break \u7ed3\u675f\u5faa\u73af
\nif [ $i -eq 3 ]; then
\necho “\u53d1\u73b0\u6570\u5b573\uff0c\u7ed3\u675f\u5faa\u73af\uff01”
\nbreak
\nfi
\ndone<\/p>\n

echo “\u5faa\u73af\u7ed3\u675f\uff01”<\/p>\n

[root@shell \/server\/scripts]$ sh break.sh
\n\u5f00\u59cb\u5faa\u73af\uff1a
\n\u5f53\u524d\u6570\u5b57\u662f 1
\n\u5f53\u524d\u6570\u5b57\u662f 2
\n\u5f53\u524d\u6570\u5b57\u662f 3
\n\u53d1\u73b0\u6570\u5b573\uff0c\u7ed3\u675f\u5faa\u73af\uff01
\n\u5faa\u73af\u7ed3\u675f\uff01<\/p>\n

\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u811a\u672c\u4f1a\u4ece1\u5faa\u73af\u52305\uff0c\u5e76\u5728\u6bcf\u6b21\u5faa\u73af\u4e2d\u8f93\u51fa\u5f53\u524d\u6570\u5b57\u3002\u5f53\u6570\u5b57\u4e3a3\u65f6\uff0c\u811a\u672c\u4f1a\u8f93\u51fa “\u53d1\u73b0\u6570\u5b573\uff0c\u7ed3\u675f\u5faa\u73af\uff01” \u5e76\u4f7f\u7528\u00a0break\u00a0\u63d0\u524d\u7ed3\u675f\u5faa\u73af\u3002\u56e0\u6b64\uff0c\u5faa\u73af\u53ea\u4f1a\u6267\u884c\u5230\u6570\u5b573\uff0c\u7136\u540e\u7ed3\u675f\u3002<\/p>\n

\u8fd0\u884c\u811a\u672c\u540e\uff0c\u53ef\u4ee5\u770b\u5230\u8f93\u51fa\u7ed3\u679c\u5305\u62ec\u4e86\u4ece1\u52303\u7684\u6570\u5b57\uff0c\u4ee5\u53ca “\u53d1\u73b0\u6570\u5b573\uff0c\u7ed3\u675f\u5faa\u73af\uff01” \u548c “\u5faa\u73af\u7ed3\u675f\uff01”\u3002<\/p>\n

4.\u8bed\u53e5<\/h1>\n

continue \u8bed\u53e5\u4e5f\u662f\u7ed3\u675f\u6d41\u7a0b\u63a7\u5236\u7684\u8bed\u53e5\u3002\u5982\u679c\u5728\u5faa\u73af\u4e2d\uff0c continue \u8bed\u53e5\u53ea\u4f1a\u7ed3\u675f\u5f53\u524d\u5355\u6b21\u5faa\u73af\uff08\u8df3\u51fa\u672c\u6b21\u5faa\u73af \u7ee7\u7eed\u4e0b\u4e00\u6b21\u5faa\u73af\uff09<\/p>\n

\u6848\u4f8b<\/h4>\n

[root@shell \/server\/scripts]$ cat continue.sh
\n#!\/bin\/bash<\/p>\n

# \u8bbe\u7f6e\u5faa\u73af\u4e0a\u9650
\nmax=5<\/p>\n

echo “\u5f00\u59cb\u5faa\u73af\uff1a”<\/p>\n

# \u4f7f\u7528\u5faa\u73af\u904d\u5386\u6570\u5b57\u5e76\u8f93\u51fa
\nfor ((i=1; i<=$max; i++)); do
\n# \u5f53\u6570\u5b57\u4e3a2\u62164\u65f6\uff0c\u4f7f\u7528 continue \u8df3\u8fc7\u5f53\u524d\u5faa\u73af
\nif [ $i -eq 2 ] || [ $i -eq 4 ]; then
\necho “\u8df3\u8fc7\u6570\u5b57 $i \u7684\u8f93\u51fa”
\ncontinue
\nfi<\/p>\n

echo “\u5f53\u524d\u6570\u5b57\u662f $i”
\ndone<\/p>\n

echo “\u5faa\u73af\u7ed3\u675f\uff01”
\n[root@shell \/server\/scripts]$ sh continue.sh
\n\u5f00\u59cb\u5faa\u73af\uff1a
\n\u5f53\u524d\u6570\u5b57\u662f 1
\n\u8df3\u8fc7\u6570\u5b57 2 \u7684\u8f93\u51fa
\n\u5f53\u524d\u6570\u5b57\u662f 3
\n\u8df3\u8fc7\u6570\u5b57 4 \u7684\u8f93\u51fa
\n\u5f53\u524d\u6570\u5b57\u662f 5
\n\u5faa\u73af\u7ed3\u675f\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"

1.\u6d41\u7a0b\u63a7\u5236\u8bed\u53e5 Shell\u7a0b\u5e8f\u6216\u8005\u8bf4\u5176\u4ed6\u7684\u7a0b\u5e8f\uff0c\u90fd\u662f\u987a\u5e8f\u6267\u884c\u7684\uff0c\u4e5f\u5c31\u662f\u7b2c\u4e00\u884c\u6267\u884c\u5b8c\u518d\u6267\u884c\u7b2c\u4e8c\u884c\uff0c\u4ee5\u6b64\u7c7b\u63a8\uff0c\u4f9d […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[25],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.qiangzhenshuai.com\/index.php?rest_route=\/wp\/v2\/posts\/1326"}],"collection":[{"href":"https:\/\/www.qiangzhenshuai.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.qiangzhenshuai.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.qiangzhenshuai.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.qiangzhenshuai.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1326"}],"version-history":[{"count":4,"href":"https:\/\/www.qiangzhenshuai.com\/index.php?rest_route=\/wp\/v2\/posts\/1326\/revisions"}],"predecessor-version":[{"id":1330,"href":"https:\/\/www.qiangzhenshuai.com\/index.php?rest_route=\/wp\/v2\/posts\/1326\/revisions\/1330"}],"wp:attachment":[{"href":"https:\/\/www.qiangzhenshuai.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1326"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.qiangzhenshuai.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1326"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.qiangzhenshuai.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1326"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}