sscanf函数的的一些用法

迷南。 2022-05-21 01:39 280阅读 0赞

来自:[https://blog.csdn.net/msgsnd/article/details/2122440][https_blog.csdn.net_msgsnd_article_details_2122440]

**文章结尾部分为自己总结使用的tips。**

sscanf与scanf类似，都是用于输入的，只是后者以屏幕(stdin)为输入源，前者以固定字符串为输入源。

函数原型：

int scanf( const char \*format \[,argument\]… );  
其中的format可以是一个或多个：

\{%\[\*\] \[width\] \[\{h|l|I64|L\}\] type|’\_’|’/t’|’/n’|非%符号\}，

注：\{a|b|c\}表示a,b,c中选一，\[d\],表示可以有d也可以没有d。

width:宽度，一般可以忽略，用法如：

const char sourceStr\[\] = “hello, world”;

char buf\[10\] = \{0\};

sscanf(sourceStr, “%5s”, buf); //%5s，只取5个字符

cout << buf<< endl;

结果为:hello

\{h|I|I64|L\}:参数的size,通常h表示单字节size，I表示2字节 size, L表示4字节size(double例外),l64表示8字节size。

type :这就很多了，就是%s,%d之类。

特别的：%\*\[width\] \[\{h|l|I64|L\}\]type 表示满足该条件的被过滤掉，不会向目标参数中写入值。如：

const char sourceStr\[\] = “hello, world”;

char buf\[10\] = \{0\};

sscanf(sourceStr, “%\*s%s”, buf);

//%\*s表示第一个匹配到的%s被过滤掉，即hello被过滤了

cout << buf<< endl;

结果为:world

支持集合操作：

%\[a-z\] 表示匹配a到z中任意字符，贪婪性(尽可能多的匹配)

%\[aB’\] 匹配a、B、’中一员，贪婪性

%\[^a\] 匹配非a的任意字符，贪婪性

和正则表达式很相似，而且仍然支持过滤，即可以有%\*\[a-z\]。

--------------------

例子：

1.  常见用法。

char buf[512] = {0};
    
        sscanf("123456 ", "%s", buf);
    
        printf("%s/n", buf);
    
        结果为：123456

1.  取指定长度的字符串。如在下例中，取最大长度为4字节的字符串。

sscanf("123456 ", "%4s", buf);
    
        printf("%s/n", buf);
    
        结果为：1234

1.  取到指定字符为止的字符串。如在下例中，取遇到空格为止字符串。

sscanf("123456 abcdedf", "%[^ ]", buf);
    
        printf("%s/n", buf);
    
        结果为：123456

1.  取仅包含指定字符集的字符串。如在下例中，取仅包含1到9和小写字母的字符串。

sscanf("123456abcdedfBCDEF", "%[1-9a-z]", buf);
    
        printf("%s/n", buf);
    
        结果为：123456abcdedf

1.  取到指定字符集为止的字符串。如在下例中，取遇到大写字母为止的字符串。

sscanf("123456abcdedfBCDEF", "%[^A-Z]", buf);
    
        printf("%s/n", buf);
    
        结果为：123456abcdedf

6、给定一个字符串iios/12DDWDFF@122，获取 / 和 @ 之间的字符串，先将 “iios/”过滤掉，再将非’@’的一串内容送到buf中

sscanf("iios/12DDWDFF@122", "%*[^/]/%[^@]", buf);
    
        printf("%s/n", buf);
    
    
        结果为：12DDWDFF

7、给定一个字符串““hello, world”，仅保留world。（注意：“，”之后有一空格）

sscanf(“hello, world”,  "%*s%s",  buf);  
    
        printf("%s/n", buf);
    
        结果为：world

%\*s表示第一个匹配到的%s被过滤掉，即hello被过滤了，如果没有空格则结果为NULL。

8、分隔字符串2006:03:18:

int a, b, c;
    
    sscanf("2006:03:18", "%d:%d:%d", a, b, c);

9、分隔字符串2006:03:18 - 2006:04:18:

char sztime1[16] = "", sztime2[16] = "";
    
        sscanf("2006:03:18 - 2006:04:18", "%s - %s", sztime1, sztime2);

10、分隔字符串2006:03:18-2006:04:18:

char sztime1[16] = "", sztime2[16] = "";
    
        sscanf("2006:03:18-2006:04:18", "%[0-9,:] - %[0-9,:]", sztime1, sztime2);

仅仅是取消了‘-’两边的空格，却打破了%s对字符串的界定format-type中有%\[\]这样的type field。如果读取的字符串，不是以空格来分隔的话，就可以使用%\[\]。%\[\]类似于一个正则表达式。\[a-z\]表示读取a-z的所有字符，\[^a-z\]表示读取除a-z以外的所有字符。

sscanf的功能很类似于正则表达式, 但却没有正则表达式强大,所以如果对于比较复杂的字符串处理,建议使用正则表达式.

正则表达式的基本用法：

1、“.”为通配符，表示任何一个字符，例如：“a.c”可以匹配“anc”、“abc”、“acc”；

2、“\[\]”，在\[\]内可以指定要求匹配的字符，例如：“a\[nbc\]c”可以匹配“anc”、“abc”、”acc”；但不可以匹配“ancc”,a到z可以写成\[a-z\],0到9可以写成\[0-9\];

3、数量限定符号，表示匹配次数（或者叫做长度）的符号,包括：

“\*” 0次或者多次

“+” 1次或者多次

“?” 0次或者1次

“\{n\}” 匹配n次，n为整数

“\{n,m\}” 匹配从n到m之间的某个数的次数；n和m都是整数；

“\{n,\}” 匹配n到无穷次之间任意次数；

“\{,m\}” 匹配0到m之间任意次数；

数量限定符号放到匹配格式的后面，例如：电话号码：024-84820482，02484820482(假设前面3或者4位，后面7或者8位，并且中间的减号可有可无)，都是符合规定的，那么可以用如下格式来匹配：\[0-9\]\{3,4\} /-? \[0-9\]\{7,8\}；注意：“/”为转义字符，因为“-”在正则表达式用有代表一个范围的意义，例如：前面所说的\[0-9\]，所以它需要转义字符“/”进行转义才可使用；

4、^为否符号，表示不想匹配的符号，例如：\[^z\]\[a-z\]+可以匹配所有除”z”开头的以外的所有字

如果^放到\[\]的外边则表示以\[\]开头的字符串；^\[az\]\[a-z\]+表示a或者z开头的长度大于等于2的英文字符串；

5、“|”或运算符，例如：a\[n|bc|cb\]c可以匹配“abcc”,“anc”,“acbc”；

6、“”以它前面的字符结尾的；例如：ab\+  ” 以 它 前 面 的 字 符 结 尾 的 ； 例 如 ： a b + 就可以被“abb”，“ab”匹配；

7、一些简单表示方法：/d表示\[0-9\];/D表示\[^0-9\];/w表示\[A-Z0-9\];/W表示\[^A-Z0-9\];/s表示\[/t/n/r/f\],就是空格字符包括tab，空格等等;/S表示\[^/t/n/r/f\]，就是非空格字符;

--------------------

%\[^a\] 匹配非a的任意字符，贪婪性

sscanf("123456 abcdedf", "%[^ ]", buf);
        printf("%s/n", buf);
        结果为：123456

在字符串`iios/12DDWDFF@122`中获取`12DDWDFF`  
%\*\[^/\]/匹配到 **/**  
%\[^@\]匹配到**@**

sscanf("iios/12DDWDFF@122", "%*[^/]/%[^@]", buf);
    printf("%s/n", buf);
    结果为：12DDWDFF

获取channel  
在字符串`Mode:Managed Channel=36 Access Point: 34:BA:9A:64:04:49`中获取`36`  
%\*\[^=\]=匹配到 **=**，我们要获取的是36，而不是=36，所以会有`=]`后多一个`=`  
%\[^A\]匹配到**A**

sscanf("Mode:Managed Channel=36 Access Point: 34:BA:9A:64:04:49", "%*[^=]=%[^A]\n", tempstr);  
    printf("tempstr:%s\n", tempstr);

tempstr:36

--------------------

一些测试  
aplist文件内容：

wlan0     Scan completed :
              Cell 01 - Address: 34:BA:9A:64:04:48
                        ESSID:"FURRIONAP_640448"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.422 GHz (Channel 3)
                        Encryption key:on
                        Bit Rates:300 Mb/s
                        Extra:wpa_ie=dd160050f20101000050f20401000050f20401000050f202
                        IE: WPA Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Extra:
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Quality=77/100  Signal level=-59 dBm  
                        Extra:fm=0003
              Cell 02 - Address: 06:69:6C:25:09:96
                        ESSID:"Guest"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.412 GHz (Channel 1)
                        Encryption key:on
                        Bit Rates:144 Mb/s
                        Extra:wpa_ie=dd160050f20101000050f20401000050f20401000050f202
                        IE: WPA Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Extra:
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Quality=76/100  Signal level=-90 dBm  
                        Extra:fm=0003
              Cell 03 - Address: 0A:69:6C:25:09:96
                        ESSID:"STAFF"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.412 GHz (Channel 1)
                        Encryption key:on
                        Bit Rates:144 Mb/s
                        Extra:wpa_ie=dd160050f20101000050f20401000050f20401000050f202
                        IE: WPA Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Extra:
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Quality=99/100  Signal level=-93 dBm  
                        Extra:fm=0003
              Cell 04 - Address: 34:BA:9A:20:65:04
                        ESSID:"Internet_Domowy_206504"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.437 GHz (Channel 6)
                        Encryption key:on
                        Bit Rates:300 Mb/s
                        Extra:rsn_ie=30140100000fac040100000fac040100000fac020000
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        IE: Unknown: DDA70050F204104A0001101044000102103B000103104700102880288028801880A88034BA9A2065041021001852616C696E6B20546563686E6F6C6F67792C20436F72702E1023001C52616C696E6B20576972656C6573732041636365737320506F696E74102400065254323836301042000831323334353637381054000800060050F20400011011000952616C696E6B41505310080002210C103C0001011049000600372A000120
                        Quality=100/100  Signal level=-78 dBm  
                        Extra:fm=0003
              Cell 05 - Address: 06:69:6C:25:06:56
                        ESSID:"Guest"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.412 GHz (Channel 1)
                        Encryption key:on
                        Bit Rates:144 Mb/s
                        Extra:wpa_ie=dd160050f20101000050f20401000050f20401000050f202
                        IE: WPA Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Extra:
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Quality=100/100  Signal level=-86 dBm  
                        Extra:fm=0001
              Cell 06 - Address: 00:11:22:33:44:55
                        ESSID:"Internet_Domowy_334455"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.412 GHz (Channel 1)
                        Encryption key:on
                        Bit Rates:300 Mb/s
                        Extra:rsn_ie=30140100000fac040100000fac040100000fac020000
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        IE: Unknown: DDA70050F204104A0001101044000101103B000103104700102880288028801880A8800011223344551021001852616C696E6B20546563686E6F6C6F67792C20436F72702E1023001C52616C696E6B20576972656C6573732041636365737320506F696E74102400065254323836301042000831323334353637381054000800060050F20400011011000952616C696E6B41505310080002210C103C0001011049000600372A000120
                        Quality=100/100  Signal level=-76 dBm  
                        Extra:fm=0003
              Cell 07 - Address: 34:BA:9A:5D:EF:42
                        ESSID:"Internet_Domowy_5DEF42"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.412 GHz (Channel 1)
                        Encryption key:on
                        Bit Rates:300 Mb/s
                        Extra:rsn_ie=30140100000fac040100000fac040100000fac020000
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        IE: Unknown: DDA70050F204104A0001101044000101103B000103104700102880288028801880A88034BA9A5DEF421021001852616C696E6B20546563686E6F6C6F67792C20436F72702E1023001C52616C696E6B20576972656C6573732041636365737320506F696E74102400065254323836301042000831323334353637381054000800060050F20400011011000952616C696E6B41505310080002210C103C0001011049000600372A000120
                        Quality=100/100  Signal level=-90 dBm  
                        Extra:fm=0003
              Cell 08 - Address: 0A:69:6C:25:06:56
                        ESSID:"STAFF"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.412 GHz (Channel 1)
                        Encryption key:on
                        Bit Rates:144 Mb/s
                        Extra:wpa_ie=dd160050f20101000050f20401000050f20401000050f202
                        IE: WPA Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Extra:
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Quality=0/100  Signal level=-90 dBm  
                        Extra:fm=0001
              Cell 09 - Address: 50:04:B8:53:0D:F8
                        ESSID:"HUAWEI-BEVAQ8"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.437 GHz (Channel 6)
                        Encryption key:off
                        Bit Rates:300 Mb/s
                        IE: Unknown: DDA60050F204104A0001101044000102103B00010310470010630412531019200612285004B8530DFC1021001B5265616C74656B2053656D69636F6E647563746F7220436F72702E1023000752544C387878781024000D45562D323031302D30392D32301042000F3132333435363738393031323334371054000800060050F2040001101100114144534C204D6F64656D2F526F757465721008000206801049000600372A000120
                        Quality=36/100  Signal level=-79 dBm  
                        Extra:fm=0003
              Cell 10 - Address: 38:37:8B:92:2E:2C
                        ESSID:"Atel_JG"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.437 GHz (Channel 6)
                        Encryption key:on
                        Bit Rates:300 Mb/s
                        Extra:rsn_ie=30140100000fac040100000fac040100000fac020000
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        IE: Unknown: DDA60050F204104A0001101044000102103B000103104700106304125310192006122838378B922E301021001B5265616C74656B2053656D69636F6E647563746F7220436F72702E1023000752544C387878781024000D45562D323031302D30392D32301042000F3132333435363738393031323334371054000800060050F2040001101100114144534C204D6F64656D2F526F757465721008000206801049000600372A000120
                        Quality=100/100  Signal level=-78 dBm  
                        Extra:fm=0003
              Cell 11 - Address: 1C:15:1F:27:62:D8
                        ESSID:"LHE"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.437 GHz (Channel 6)
                        Encryption key:on
                        Bit Rates:300 Mb/s
                        Extra:rsn_ie=30140100000fac040100000fac040100000fac020000
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        IE: Unknown: DD470050F204104A0001101044000102101100114144534C204D6F64656D2F526F7574657210080002068010470010630412531019200612281C151F2762DC1049000600372A000120
                        Quality=68/100  Signal level=-96 dBm  
                        Extra:fm=0001
              Cell 12 - Address: 34:BA:9A:63:78:5A
                        ESSID:"PLDT_Home_jjjjjjjjjj"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.457 GHz (Channel 10)
                        Encryption key:on
                        Bit Rates:300 Mb/s
                        Extra:wpa_ie=dd1a0050f20101000050f20202000050f2020050f20401000050f202
                        IE: WPA Version 1
                            Group Cipher : TKIP
                            Pairwise Ciphers (2) : TKIP CCMP
                            Authentication Suites (1) : PSK
                        Extra:
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : TKIP
                            Pairwise Ciphers (2) : TKIP CCMP
                            Authentication Suites (1) : PSK
                        IE: Unknown: DDA70050F204104A0001101044000102103B000103104700102880288028801880A88034BA9A63785A1021001852616C696E6B20546563686E6F6C6F67792C20436F72702E1023001C52616C696E6B20576972656C6573732041636365737320506F696E74102400065254323836301042000831323334353637381054000800060050F20400011011000952616C696E6B41505310080002218C103C0001011049000600372A000120
                        Quality=66/100  Signal level=-90 dBm  
                        Extra:fm=0003
              Cell 13 - Address: 34:BA:9A:5D:FA:F8
                        ESSID:"PT30-WP"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.452 GHz (Channel 9)
                        Encryption key:on
                        Bit Rates:300 Mb/s
                        Extra:rsn_ie=30140100000fac040100000fac040100000fac020000
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        IE: Unknown: DD310050F204104A0001101044000102104700102880288028801880A88034BA9A5DFAF8103C0001011049000600372A000120
                        Quality=97/100  Signal level=-90 dBm  
                        Extra:fm=0001
              Cell 14 - Address: 06:AA:BB:CC:00:06
                        ESSID:"FURRIONAP_CC0006"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.467 GHz (Channel 12)
                        Encryption key:on
                        Bit Rates:300 Mb/s
                        Extra:wpa_ie=dd160050f20101000050f20401000050f20401000050f202
                        IE: WPA Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Extra:
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Quality=20/100  Signal level=-91 dBm  
                        Extra:fm=0003
              Cell 15 - Address: 34:BA:9A:5D:13:35
                        ESSID:"FURRIONAP_5D1335"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.472 GHz (Channel 13)
                        Encryption key:on
                        Bit Rates:300 Mb/s
                        Extra:wpa_ie=dd160050f20101000050f20401000050f20401000050f202
                        IE: WPA Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Extra:
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Quality=34/100  Signal level=-93 dBm  
                        Extra:fm=0003
              Cell 16 - Address: EC:26:CA:86:A9:8C
                        ESSID:"ASA"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.462 GHz (Channel 11)
                        Encryption key:on
                        Bit Rates:300 Mb/s
                        Extra:wpa_ie=dd160050f20101000050f20401000050f20401000050f202
                        IE: WPA Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Extra:
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Quality=15/100  Signal level=-96 dBm  
                        Extra:fm=0003
              Cell 17 - Address: 34:BA:9A:5D:F3:1B
                        ESSID:"ALR-F30G-5DF31B"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.472 GHz (Channel 13)
                        Encryption key:on
                        Bit Rates:300 Mb/s
                        Extra:wpa_ie=dd160050f20101000050f20401000050f20401000050f202
                        IE: WPA Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Extra:
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Quality=20/100  Signal level=-85 dBm  
                        Extra:fm=0001
              Cell 18 - Address: 34:BA:9A:65:43:21
                        ESSID:"FURRIONAP_654321"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.472 GHz (Channel 13)
                        Encryption key:on
                        Bit Rates:300 Mb/s
                        Extra:wpa_ie=dd160050f20101000050f20401000050f20401000050f202
                        IE: WPA Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Extra:
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Quality=100/100  Signal level=-77 dBm  
                        Extra:fm=0003
              Cell 19 - Address: 28:80:A2:1B:88:40
                        ESSID:"skyus_testing_xs"
                        Protocol:IEEE 802.11bgn
                        Mode:Master
                        Frequency:2.472 GHz (Channel 13)
                        Encryption key:on
                        Bit Rates:72 Mb/s
                        Extra:rsn_ie=30140100000fac040100000fac040100000fac020c00
                        IE: IEEE 802.11i/WPA2 Version 1
                            Group Cipher : CCMP
                            Pairwise Ciphers (1) : CCMP
                            Authentication Suites (1) : PSK
                        Quality=58/100  Signal level=-99 dBm  
                        Extra:fm=0003

json_object* get_apconflist() { int index,count=0,i; char str[512]={0}; char tempstr[256]={0}; FILE *fp; //char aplist[20][5][1024]; json_object* getapconf_array_list; getapconf_array_list = json_object_new_array(); my_printf(LOG_MODE_LEVEL_1, "%s(%d) get_apconflist\n",__FUNCTION__,__LINE__); system("iwlist wlan0 scan > /tmp/aplist"); if ((fp=fopen("/tmp/aplist","r"))!=NULL) { while (fgets(str, 512, fp) != NULL) { if(strstr(str,"Cell") != NULL) { count++; } } fclose(fp); my_printf(LOG_MODE_LEVEL_1, "%s(%d) count is %d\n",__FUNCTION__,__LINE__,count); } if ((fp=fopen("/tmp/aplist","r"))!=NULL) { APLIST aplist[count]; for(i=0;i<count;i++) { json_object *rsp_json = NULL; rsp_json = json_object_new_object(); CHECK_NEW_JSON(rsp_json); my_printf(LOG_MODE_LEVEL_1, "%s(%d) for is ok\n",__FUNCTION__,__LINE__); while (fgets(str, 512, fp) != NULL) { if(strstr(str, "Address:")) // Address: 06:69:6C:25:09:96 { sscanf(str,"%*[^:]: %[^\n]\n",tempstr); my_printf(LOG_MODE_LEVEL_1, "%s(%d) tempstr is %s\n",__FUNCTION__,__LINE__,tempstr); strcpy(aplist[i].bssid,tempstr); json_object_object_add(rsp_json, "index", json_object_new_int(i+1)); json_object_object_add(rsp_json, "bssid", json_object_new_string(aplist[i].bssid)); my_printf(LOG_MODE_LEVEL_1, "%s(%d) bssid is %s\n",__FUNCTION__,__LINE__,aplist[i].bssid); } if(strstr(str, "ESSID:")) // ESSID:"FURRIONAP_640448" { sscanf(str,"%*[^\"]\" %[^\"]\n",tempstr); my_printf(LOG_MODE_LEVEL_1, "%s(%d) tempstr is %s\n",__FUNCTION__,__LINE__,tempstr); strcpy(aplist[i].ssid,tempstr); json_object_object_add(rsp_json, "ssid", json_object_new_string(aplist[i].ssid)); my_printf(LOG_MODE_LEVEL_1, "%s(%d) ssid is %s\n",__FUNCTION__,__LINE__,aplist[i].ssid); } if(strstr(str, "Frequency:")) // Frequency:2.412 GHz (Channel 1) { sscanf(str,"%*[^l]l %[^)]\n",tempstr); my_printf(LOG_MODE_LEVEL_1, "%s(%d) tempstr is %s\n",__FUNCTION__,__LINE__,tempstr); strcpy(aplist[i].channel,tempstr); json_object_object_add(rsp_json, "channel", json_object_new_string(aplist[i].channel)); my_printf(LOG_MODE_LEVEL_1, "%s(%d) channel is %s\n",__FUNCTION__,__LINE__,aplist[i].channel); } if(strstr(str, "Encryption key:")) // Encryption key:on { sscanf(str,"%*[^:]: %[^\n]\n",tempstr); my_printf(LOG_MODE_LEVEL_1, "%s(%d) tempstr is %s\n",__FUNCTION__,__LINE__,tempstr); if(strstr(tempstr,"off")) { strcpy(aplist[i].security_mode,"Disable"); json_object_object_add(rsp_json, "security_mode", json_object_new_string(aplist[i].security_mode)); my_printf(LOG_MODE_LEVEL_1, "%s(%d) security_mode is %s\n",__FUNCTION__,__LINE__,aplist[i].security_mode); } } if(strstr(str,"WPA Version")) //IE: WPA Version 1 { strcpy(aplist[i].security_mode,"WPA1PSK"); my_printf(LOG_MODE_LEVEL_1, "%s(%d) security_mode is %s\n",__FUNCTION__,__LINE__,aplist[i].security_mode); } if(strstr(str,"802.11i/WPA2 Version")) //IE: IEEE 802.11i/WPA2 Version 1 { if(strstr(aplist[i].security_mode,"WPA1PSK")) { strcat(aplist[i].security_mode,"WPA2PSK"); my_printf(LOG_MODE_LEVEL_1, "%s(%d) security_mode is %s\n",__FUNCTION__,__LINE__,aplist[i].security_mode); } else { strcpy(aplist[i].security_mode,"WPA2PSK"); my_printf(LOG_MODE_LEVEL_1, "%s(%d) security_mode is %s\n",__FUNCTION__,__LINE__,aplist[i].security_mode); } } if(strstr(str,"Pairwise Ciphers")) //Pairwise Ciphers (1) : CCMP { if(strstr(aplist[i].security_mode,"WPA1PSK")) { sscanf(str,"%*[^:]: %[^\n]\n",tempstr); if(strstr(tempstr,"TKIP CCMP")) { strcpy(aplist[i].security_mode,"WPA1PSK/TKIPAES"); } else strcpy(aplist[i].security_mode,"WPA1PSK/AES"); } if(strstr(aplist[i].security_mode,"WPA2PSK")) { sscanf(str,"%*[^:]: %[^\n]\n",tempstr); if(strstr(tempstr,"TKIP CCMP")) { strcpy(aplist[i].security_mode,"WPA1PSKWPA2PSK/TKIPAES"); } else strcpy(aplist[i].security_mode,"WPA1PSKWPA2PSK/AES"); } json_object_object_add(rsp_json, "security_mode", json_object_new_string(aplist[i].security_mode)); my_printf(LOG_MODE_LEVEL_1, "%s(%d) security_mode is %s\n",__FUNCTION__,__LINE__,aplist[i].security_mode); } if(strstr(str, "Signal level")) // Signal level=-59 dBm { sscanf(str,"%*[^-]%[^\n]\n",tempstr); my_printf(LOG_MODE_LEVEL_1, "%s(%d) tempstr is %s\n",__FUNCTION__,__LINE__,tempstr); strcpy(aplist[i].signLevel,tempstr); json_object_object_add(rsp_json, "signLevel", json_object_new_string(aplist[i].signLevel)); my_printf(LOG_MODE_LEVEL_1, "%s(%d) signLevel is %s\n",__FUNCTION__,__LINE__,aplist[i].signLevel); my_printf(LOG_MODE_LEVEL_1, "%s(%d) final_rsp_json %s\n",__FUNCTION__,__LINE__,json_object_to_json_string(rsp_json)); json_object_array_add(getapconf_array_list,rsp_json); break; } } } } fclose(fp); // my_printf(LOG_MODE_LEVEL_1, "%s(%d) final_json %s\n",__FUNCTION__,__LINE__,json_object_to_json_string(getapconf_array_list)); return getapconf_array_list; }

[https_blog.csdn.net_msgsnd_article_details_2122440]: https://blog.csdn.net/msgsnd/article/details/2122440