{"id":3517,"date":"2017-08-11T22:55:18","date_gmt":"2017-08-11T14:55:18","guid":{"rendered":"https:\/\/ixyzero.com\/blog\/?p=3517"},"modified":"2017-08-11T22:55:18","modified_gmt":"2017-08-11T14:55:18","slug":"linux%e4%b8%8bc%e8%af%ad%e8%a8%80%e4%b8%ad%e5%a6%82%e4%bd%95%e8%8e%b7%e5%8f%96%e6%96%87%e4%bb%b6%e7%9a%84%e7%bb%9d%e5%af%b9%e8%b7%af%e5%be%84","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/3517.html","title":{"rendered":"Linux\u4e0bC\u8bed\u8a00\u4e2d\u5982\u4f55\u83b7\u53d6\u6587\u4ef6\u7684\u7edd\u5bf9\u8def\u5f84"},"content":{"rendered":"

=Start=<\/p>\n

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

\u5b66\u4e60\u9700\u8981<\/p>\n

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

\u53c2\u8003\u89e3\u7b54\uff1a<\/h5>\n
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#include <stdlib.h><\/code><\/div>\n
#include <stdio.h><\/code><\/div>\n
<\/div>\n
#ifndef PATH_MAX<\/code><\/div>\n
#define PATH_MAX\u00a0<\/code>128<\/code><\/div>\n
#endif<\/code><\/div>\n
<\/div>\n
int<\/code>\u00a0main(<\/code>int<\/code>\u00a0argc,\u00a0<\/code>char<\/code>\u00a0const<\/code>\u00a0*argv[])<\/code><\/div>\n
{<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>(argc <\u00a0<\/code>2<\/code>) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>return<\/code>\u00a01<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>char<\/code>\u00a0resolved_path[PATH_MAX];<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>int<\/code>\u00a0i;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>for<\/code>(i =\u00a0<\/code>1<\/code>; i < argc; i++){<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>realpath(argv[i], resolved_path);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"%s -> %s\\n\"<\/code>, argv[i], resolved_path);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>return<\/code>\u00a00<\/code>;<\/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

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#ifndef PATH_MAX<\/code><\/div>\n
#define PATH_MAX\u00a0<\/code>1024<\/code><\/div>\n
#endif<\/code><\/div>\n
<\/div>\n
int<\/code>\u00a0get_path_from_pid (<\/code>int<\/code>\u00a0pid,\u00a0<\/code>char<\/code>\u00a0path[PATH_MAX])<\/code><\/div>\n
{<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>char<\/code>\u00a0file[PATH_MAX];<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>snprintf(file, PATH_MAX,\u00a0<\/code>\"\/proc\/%d\/exe\"<\/code>, pid);<\/code><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>int<\/code>\u00a0len =\u00a0<\/code>0<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>\u00a0((len = readlink(file, path, PATH_MAX-<\/code>1<\/code>)) != -<\/code>1<\/code>) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>path[len] =\u00a0<\/code>'\\0'<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>return<\/code>\u00a00<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>path[<\/code>0<\/code>] =\u00a0<\/code>'\\0'<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>return<\/code>\u00a0-<\/code>1<\/code>;<\/code><\/div>\n
}<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\u53c2\u8003\u94fe\u63a5\uff1a<\/h5>\n