Created
January 17, 2014 16:19
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send(2)のラッパー関数とマクロ定義
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#include <stdio.h> | |
#include <stdlib.h> | |
#include <stdarg.h> | |
#include <string.h> | |
#include <errno.h> | |
#include <time.h> | |
#include <sys/types.h> | |
#include <sys/socket.h> | |
void err_msg(const char *, const char *, int, const char *, const char *, ...); | |
//ラッパー関数のマクロ - 本来の引数に加えて、ファイル名、関数名、行番号の情報をマクロで埋め込む | |
#define Send(s,b,l,f) e_Send((s),(b),(l),(f), __FILE__, __FUNCTION__, __LINE__) | |
ssize_t | |
e_Send(int sockfd, const void *buf, size_t len, int flags, | |
const char *file, const char *function, int line) | |
{ | |
ssize_t n; | |
if((n = send(sockfd, buf, len, flags)) < 0){ | |
err_msg(file, function, line, "error","[%d]=send(%d,%s,%d,%d):%s", n, sockfd, buf, len , flags, strerror(errno)); | |
close(sockfd); | |
exit(1); | |
} | |
return n; | |
} | |
void | |
err_msg(const char *file, const char *function, int line, const char *type, const char *fmt, ...) | |
{ | |
time_t timer; | |
time(&timer); | |
char *t = ctime(&timer); | |
t[strlen(t)-1] = '\0'; | |
fprintf(stderr, "%s ", t); /* 現在時刻を表示 */ | |
fprintf(stderr, "%d ", getpid()); /* プロセスIDを出力 */ | |
fprintf(stderr, "%s %s %d %s ", file, function, line, type); | |
va_list ap; | |
va_start(ap, fmt); | |
vfprintf(stderr, fmt, ap); /* fmtの書式に従って可変個数引数を順次呼び出す */ | |
va_end(ap); | |
fprintf(stderr, " %s(%d)", strerror(errno), errno); /* エラーメッセージを出力 */ | |
fputc('\n', stderr); | |
} |
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