{"id":3429,"date":"2017-07-21T20:29:32","date_gmt":"2017-07-21T12:29:32","guid":{"rendered":"https:\/\/ixyzero.com\/blog\/?p=3429"},"modified":"2017-07-21T20:29:32","modified_gmt":"2017-07-21T12:29:32","slug":"c%e8%af%ad%e8%a8%80%e4%b8%ad%e7%9a%84%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%9f%a5%e6%89%be%e5%ad%90%e4%b8%b2%e6%88%aa%e5%8f%96","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/3429.html","title":{"rendered":"C\u8bed\u8a00\u4e2d\u7684\u5b57\u7b26(\u4e32)\u67e5\u627e\/\u5b50\u4e32\u622a\u53d6"},"content":{"rendered":"

=Start=<\/p>\n

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

\u5728Linux\u4e0bC\u8bed\u8a00\u7684\u5b9e\u9645\u7f16\u7a0b\u4e2d\uff0c\u5b57\u7b26\u4e32\u64cd\u4f5c\u662f\u975e\u5e38\u5e38\u89c1\u7684\uff0c\u5728\u6b64\u6574\u7406\u4e00\u4e0b\u81ea\u5df1\u5e38\u7528\u5230\u7684\u4e00\u4e9b\u4f8b\u5b50\uff0c\u65b9\u4fbf\u4ee5\u540e\u53c2\u8003\u3002<\/p>\n

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

\u53c2\u8003\u89e3\u7b54\uff1a<\/h5>\n
1.\u5b50\u4e32\u67e5\u627e&\u5b57\u7b26\u67e5\u627e\uff08strstr\/strchr\uff09<\/h6>\n
\n
\n
\n
\n\n\n\n
\n
\n
void<\/code>\u00a0strchr_test() {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>char<\/code>\u00a0*string =\u00a0<\/code>\"qwerty\"<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>char<\/code>\u00a0*e;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>int<\/code>\u00a0index;<\/code><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>e = strchr(string,\u00a0<\/code>'e'<\/code>);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>\u00a0(e == NULL) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"Character '%c' not found in '%s'\\n\"<\/code>,\u00a0<\/code>'e'<\/code>, string);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>return<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>index = (<\/code>int<\/code>)(e - string);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"index of char('%c') in '%s' is %d\\n\"<\/code>,\u00a0<\/code>'e'<\/code>, string, index);\u00a0<\/code>\/\/ 2<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"the rest of str('%s') is '%s'\\n\"<\/code>, string, e);\u00a0\u00a0\u00a0<\/code>\/\/ 'erty'<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"the rest+1 of str('%s') is '%s'\\n\"<\/code>, string, e+<\/code>1<\/code>);\u00a0<\/code>\/\/ 'rty'<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"\\n\"<\/code>);<\/code><\/div>\n
}<\/code><\/div>\n
<\/div>\n
void<\/code>\u00a0strstr_test() {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>char<\/code>\u00a0*str =\u00a0<\/code>\"sdfadabcGGGGGGGGG\"<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>char<\/code>\u00a0*result = strstr(str,\u00a0<\/code>\"abc\"<\/code>);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>int<\/code>\u00a0position = result - str;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"substr('%s') of str('%s') index is %d\\n\"<\/code>,\u00a0<\/code>\"abc\"<\/code>, str, position);\u00a0<\/code>\/\/ 5<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"the rest of str('%s') is '%s'\\n\"<\/code>, str, result);\u00a0<\/code>\/\/ 'abcGGGGGGGGG'<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>printf(<\/code>\"the rest of rest of str('%s') is '%s'\\n\"<\/code>, str, result+position);\u00a0<\/code>\/\/ 'GGGGGGG'<\/code><\/div>\n
}<\/code><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
2.\u6587\u4ef6\u6309\u884c\u8bfb\u53d6&\u5b57\u7b26\u4e32\u6bd4\u8f83&\u5b57\u7b26\u67e5\u627e&\u6309\u5206\u9694\u7b26\u5207\u5206&\u5b57\u7b26\u4e32\u8f6c\u6362\u6210\u6574\u6570\uff08getline\/strncmp\/strchr\/strsep\/strtol\uff09<\/h6>\n
\n
\n
\n
\n\n\n\n
\n
\n
#define MAX_PID_COUNT\u00a0<\/code>32<\/code><\/div>\n
int<\/code>\u00a0pid_list[MAX_PID_COUNT] = { [\u00a0<\/code>0<\/code>\u00a0... MAX_PID_COUNT-<\/code>1<\/code>\u00a0] = -<\/code>1<\/code>\u00a0};<\/code><\/div>\n
<\/div>\n
int<\/code>\u00a0usr1_reload() {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>FILE *fp;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>fp = fopen(<\/code>\"\/tmp\/pmon.txt\"<\/code>,\u00a0<\/code>\"r\"<\/code>);\u00a0<\/code>\/* pid_s = 1, 2, 3, 999 *\/<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>\u00a0(fp == NULL) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>perror(<\/code>\"fopen\"<\/code>);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>return<\/code>\u00a0-<\/code>1<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>char<\/code>\u00a0*line = NULL, *index = NULL;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>char<\/code>\u00a0pid_str[<\/code>1024<\/code>] = {<\/code>0<\/code>}, *pid_str_p, *token = NULL, delim[] =\u00a0<\/code>\", \"<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>size_t len =\u00a0<\/code>0<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>ssize_t nread;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>int<\/code>\u00a0i =\u00a0<\/code>0<\/code>, pid;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>while<\/code>\u00a0((nread = getline(&line, &len, fp)) != -<\/code>1<\/code>) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>\u00a0(strncmp(line,\u00a0<\/code>\"pid_s\"<\/code>,\u00a0<\/code>5<\/code>) ==\u00a0<\/code>0<\/code>) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>index = strchr(line,\u00a0<\/code>'='<\/code>);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>\u00a0(index) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>strncpy(pid_str, index+<\/code>1<\/code>, nread-<\/code>6<\/code>);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>pid_str_p = pid_str;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>token = strsep(&pid_str_p, delim);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>while<\/code>(token != NULL){<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>\u00a0(token[<\/code>0<\/code>] !=\u00a0<\/code>'\\0'<\/code>) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>pid = (<\/code>int<\/code>) strtol(token, NULL,\u00a0<\/code>10<\/code>);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>\u00a0(pid <=\u00a0<\/code>0<\/code>\u00a0|| pid == (<\/code>int<\/code>)LONG_MIN || pid == (<\/code>int<\/code>)LONG_MAX) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>}\u00a0<\/code>else<\/code>\u00a0{<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>\u00a0(i < MAX_PID_COUNT) {<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>pid_list[i++] = pid;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>token = strsep(&pid_str_p, delim);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>break<\/code>;<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>}<\/code><\/div>\n
<\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>if<\/code>(line)<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/code>free(line);<\/code><\/div>\n
\u00a0\u00a0\u00a0\u00a0<\/code>fclose(fp);<\/code><\/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

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

Linux\u7684C\u8bed\u8a00\u4e2d\u83b7\u53d6\u5b50\u4e32\u7684\u7d22\u5f15
\nhttps:\/\/stackoverflow.com\/questions\/7500892\/get-index-of-substring<\/a><\/p>\n

Linux\u7684C\u8bed\u8a00\u4e2d\u83b7\u53d6\u5b57\u7b26\u7684\u7d22\u5f15
\nhttps:\/\/stackoverflow.com\/questions\/3217629\/how-do-i-find-the-index-of-a-character-within-a-string-in-c<\/a><\/p>\n

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

=Start= \u7f18\u7531\uff1a \u5728Linux\u4e0bC\u8bed\u8a00\u7684\u5b9e\u9645\u7f16\u7a0b\u4e2d\uff0c\u5b57\u7b26\u4e32\u64cd\u4f5c\u662f\u975e\u5e38\u5e38\u89c1\u7684\uff0c\u5728\u6b64\u6574\u7406\u4e00\u4e0b\u81ea\u5df1\u5e38\u7528\u5230\u7684\u4e00\u4e9b […]<\/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":[100,30,860,859,861],"class_list":["post-3429","post","type-post","status-publish","format-standard","hentry","category-knowledgebase-2","category-linux","category-programing","tag-c","tag-linux","tag-strchr","tag-strstr","tag-strtol"],"views":6151,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/3429","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=3429"}],"version-history":[{"count":1,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/3429\/revisions"}],"predecessor-version":[{"id":3430,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/3429\/revisions\/3430"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=3429"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=3429"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=3429"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}