46 lines
682 B
C
46 lines
682 B
C
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#include <fcntl.h>
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#include <stdio.h>
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#include <unistd.h>
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#define RWRR S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
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int main(void) {
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int fd = open("test/filefp", O_RDWR | O_CREAT | O_TRUNC, RWRR);
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if(fd == -1) {
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printf("open file error filefp\n");
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return -1;
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}
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FILE *fp = fdopen(fd, "w+");
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char buf[1024];
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if(setvbuf(fp, buf, _IOFBF, 1024)) {
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printf("setvbuf error\n");
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return -1;
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}
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if(ferror(fp)) {
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printf("io stream error\n");
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return -1;
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}
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if(feof(fp)) {
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printf("arrive the end of the file\n");
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}
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putc('H', fp);
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fputc('Y', fp);
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fputs(" Hello World!", fp);
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fflush(fp);
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fclose(fp);
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close(fd);
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return 0;
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}
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