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本文實例為大家分享了C語言+shell實現linux網卡狀態檢測的具體代碼,供大家參考,具體內容如下
不解釋,直接上代碼 要求linux環境具備grep和awk(awk可選)
#include <unistd.h> #include <stdlib.h> #include <stdio.h> #include <string.h> int get_if_status(char *if_name) { char buffer[BUFSIZ]; char cmd[100]; FILE *read_fp; int chars_read; int ret =0; memset( buffer, 0, BUFSIZ ); memset( cmd, 0, 100 ); sprintf(cmd, "ifconfig -a | grep %s",if_name); read_fp = popen(cmd, "r"); if ( read_fp != NULL ) { chars_read = fread(buffer, sizeof(char), BUFSIZ-1, read_fp); pclose(read_fp); if (chars_read > 0) { ret = 1; } else { fprintf(stderr, "%s: NO FOUND\r\n",if_name); return 0; } } if(ret == 1) { memset( buffer, 0, BUFSIZ ); memset( cmd, 0, 100 ); sprintf(cmd, "ifconfig |grep %s",if_name); read_fp = popen(cmd, "r"); if ( read_fp != NULL ) { chars_read = fread(buffer, sizeof(char), BUFSIZ-1, read_fp); pclose(read_fp); if (chars_read > 0) { ret = 2; } else { fprintf(stderr, "%s: DOWN\r\n",if_name); return 1; } } } if(ret == 2) { memset( buffer, 0, BUFSIZ ); memset( cmd, 0, 100 ); sprintf(cmd, "ifconfig %s | grep RUNNING | awk '{print $3}'",if_name); read_fp = popen(cmd, "r"); if ( read_fp != NULL ) { chars_read = fread(buffer, sizeof(char), BUFSIZ-1, read_fp); pclose(read_fp); if (chars_read > 0) { fprintf(stderr, "%s: LINKED\r\n",if_name); return 3; } else { fprintf(stderr, "%s: UNPLUGGED\r\n",if_name); return 2; } } } return -1; } int main(int argc, char* argv[]) { int i=0; if(argc != 2) { fprintf(stderr, "usage: %s <ethname>", argv[0]); return -1; } i = get_if_status(argv[1]); printf( "if_status = %d\n", i ); return 0; }
嵌入式編譯 mips-linux-gnu-gcc -mips32 -EL -mhard-float -Wall -o netlink netlink.c
測試結果
# ./netlink eth200 eth200: NO FOUND if_status = 0 # # ifconfig eth0 down # ./netlink eth0 eth0: DOWN if_status = 1 # # ifconfig eth0 up # ./netlink eth0 eth0: UNPLUGGED if_status = 2 # # ./netlink eth0 eth0: LINKED if_status = 3
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支持億速云。
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