{"id":3406,"date":"2017-07-14T22:17:55","date_gmt":"2017-07-14T14:17:55","guid":{"rendered":"https:\/\/ixyzero.com\/blog\/?p=3406"},"modified":"2017-07-14T22:17:55","modified_gmt":"2017-07-14T14:17:55","slug":"linux%e4%b8%8b%e7%9a%84c%e8%af%ad%e8%a8%80isatty%e5%92%8cttyname","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/3406.html","title":{"rendered":"Linux\u4e0b\u7684C\u8bed\u8a00#isatty\u548cttyname"},"content":{"rendered":"

=Start=<\/p>\n

\u7f18\u7531\uff1a<\/h4>\n

\u6574\u7406\u5b66\u4e60\u5728\u8fdb\u884cLinux\u4e0bC\u7f16\u7a0b\u4e2d\u78b0\u5230\u7684\u4e00\u4e9b\u77e5\u8bc6\u70b9\uff0c\u65b9\u4fbf\u4ee5\u540e\u8fdb\u884c\u53c2\u8003\u3002<\/p>\n

\u6b63\u6587\uff1a<\/h4>\n

\u53c2\u8003\u89e3\u7b54\uff1a<\/h5>\n
\n
\n
\n
\n\n\n\n
\n
\n
#include <unistd.h><\/code><\/div>\n
#include <stdio.h><\/code><\/div>\n
#include <stdlib.h><\/code><\/div>\n
<\/div>\n
int<\/code>\u00a0main(<\/code>int<\/code>\u00a0argc,\u00a0<\/code>char<\/code>\u00a0**argv){<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>int<\/code>\u00a0t, fd;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>\u00a0( argc ==\u00a0<\/code>1<\/code>\u00a0){<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"Syntax: %s 0\/1\/2\\n\"<\/code>, argv[<\/code>0<\/code>]);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>exit(EXIT_SUCCESS);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>fd = atoi(argv[<\/code>1<\/code>]);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>t = isatty(fd);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>( t )<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"fd is %d, which is a tty\\n\"<\/code>, fd);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>else<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"fd is %d, which isn't a tty\\n\"<\/code>, fd);<\/code><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>\u00a0( t ==\u00a0<\/code>1<\/code>\u00a0)<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"tty name is %s\\n\"<\/code>, ttyname(fd));<\/code><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>return<\/code>\u00a0EXIT_SUCCESS;<\/code><\/div>\n
}<\/code><\/div>\n
<\/div>\n
\/*<\/code><\/div>\n
#include <unistd.h><\/code><\/div>\n
<\/div>\n
char *ttyname(int fd);\u00a0 \/\/ \u6267\u884c\u6210\u529f\u65f6\u8fd4\u56de\u4e00\u4e2a\u5408\u6cd5\u6307\u9488\uff0c\u5426\u5219\u8fd4\u56de NULL<\/code><\/div>\n
int ttyname_r(int fd, char *buf, size_t buflen);<\/code><\/div>\n
<\/div>\n
int isatty(int fd); \/\/\u8fd4\u56de 1 \u5219\u8868\u660e fd \u662f\u4e00\u4e2a\u6307\u5411\u7ec8\u7aef\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\uff1b\u5426\u5219\u8fd4\u56de 0<\/code><\/div>\n
*\/<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

&<\/p>\n

\u53c2\u8003\u94fe\u63a5\uff1a<\/h5>\n

http:\/\/man7.org\/linux\/man-pages\/man3\/ttyname.3.html<\/a>
\nhttp:\/\/www.iteedu.com\/os\/linux\/linuxprgm\/linuxcfunctions\/console\/ttyname.php<\/a>
\nhttps:\/\/www.cyberciti.biz\/tips\/programming-c-find-out-name-of-a-terminal.html<\/a>
\nhttps:\/\/www.kancloud.cn\/wizardforcel\/linux-c-api-ref\/98624<\/a>
\nhttps:\/\/stackoverflow.com\/questions\/36298779\/determining-which-tty-a-program-uses\/36299446<\/a><\/p>\n

https:\/\/stackoverflow.com\/questions\/26168998\/running-who-am-i-in-a-single-command-with-sudo-doesnt-return-anything<\/a>
\nhttps:\/\/stackoverflow.com\/questions\/25334464\/why-does-using-pipes-with-who-cause-mom-not-to-like-me<\/a>
\nhttp:\/\/blog.csdn.net\/xingzhibo\/article\/details\/38924971<\/a><\/p>\n

terminal\/shell\/tty\/console\u4e4b\u95f4\u7684\u533a\u522b\u5230\u5e95\u5728\u54ea\uff1f
\nhttps:\/\/unix.stackexchange.com\/questions\/4126\/what-is-the-exact-difference-between-a-terminal-a-shell-a-tty-and-a-con<\/a><\/p>\n

TTY\u89e3\u5bc6
\nhttp:\/\/www.linusakesson.net\/programming\/tty\/<\/a><\/p>\n

https:\/\/stackoverflow.com\/questions\/7114990\/pseudo-terminal-will-not-be-allocated-because-stdin-is-not-a-terminal<\/a><\/p>\n

https:\/\/blog.ropnop.com\/upgrading-simple-shells-to-fully-interactive-ttys\/<\/a><\/p>\n

=END=<\/p>\n","protected":false},"excerpt":{"rendered":"

=Start= \u7f18\u7531\uff1a \u6574\u7406\u5b66\u4e60\u5728\u8fdb\u884cLinux\u4e0bC\u7f16\u7a0b\u4e2d\u78b0\u5230\u7684\u4e00\u4e9b\u77e5\u8bc6\u70b9\uff0c\u65b9\u4fbf\u4ee5\u540e\u8fdb\u884c\u53c2\u8003\u3002 \u6b63\u6587\uff1a \u53c2\u8003\u89e3 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,11,7],"tags":[100,852,30,460,853],"class_list":["post-3406","post","type-post","status-publish","format-standard","hentry","category-knowledgebase-2","category-linux","category-programing","tag-c","tag-isatty","tag-linux","tag-tty","tag-ttyname"],"views":3984,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/3406","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/comments?post=3406"}],"version-history":[{"count":1,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/3406\/revisions"}],"predecessor-version":[{"id":3407,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/3406\/revisions\/3407"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=3406"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=3406"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=3406"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}