/*********************************************************************************
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* Copyright: (C) 2023 LingYun IoT System Studio.
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* All rights reserved.
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*
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* Filename: mycp.c
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* Description: This file file copy example code, don't not support foler.
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*
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* Version: 1.0.0(2023年08月09日)
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* Author: Guo Wenxue <guowenxue@gmail.com>
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* ChangeLog: 1, Release initial version on "2023年08月09日 10时09分57秒"
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*
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********************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <libgen.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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int main (int argc, char **argv)
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{
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struct stat sbuf;
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char *progname = basename(argv[0]);
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char *src, *dst;
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int fd_src, fd_dst;
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char buf[2048];
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int rv, left;
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if( argc != 3 )
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{
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printf("Usage: %s [src] [dst]\n", progname);
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return 0;
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}
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src = argv[1];
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dst = argv[2];
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/* check file type */
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if( stat(src, &sbuf) )
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{
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printf("%s: cannot stat '%s': %s\n", progname, src, strerror(errno));
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return 2;
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}
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if( !S_ISREG(sbuf.st_mode) )
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{
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printf("%s: %s is not text file\n", progname, src);
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return 3;
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}
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/* open files */
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if( (fd_src=open(src, O_RDONLY)) < 0 )
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{
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printf("%s: open '%s' failure: %s\n", progname, src, strerror(errno));
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return 4;
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}
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if( (fd_dst=open(dst, O_RDWR|O_TRUNC|O_CREAT, sbuf.st_mode&0x777)) < 0 )
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{
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printf("%s: open '%s' failure: %s\n", progname, dst, strerror(errno));
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return 5;
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}
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/* copy file content */
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left = sbuf.st_size;
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while( left > 0 )
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{
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rv = read(fd_src, buf, sizeof(buf));
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if( rv > 0)
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{
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rv = write(fd_dst, buf, rv);
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left -= rv;
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}
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}
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return 0;
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}
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