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49 lines
1019 B
C
49 lines
1019 B
C
/*
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* This test attaches a FILE stream to each of the descriptors STDIN_FILENO
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* and STDOUT_FILENO, then reads from the former and writes to the latter
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* in binary mode until EOF is reached.
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*
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* Devin Reade, 1997.
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*
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* $Id: fdopen2.c,v 1.2 1997/09/21 16:36:18 gdr Exp $
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#define BUFFERSIZE 1024
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char buffer[BUFFERSIZE];
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int
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main(int argc, char **argv) {
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FILE *fp1, *fp2;
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int fd1 = STDIN_FILENO;
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int fd2 = STDOUT_FILENO;
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fprintf(stderr,"starting\n");
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if ((fp1 = fdopen(fd1, "rb")) == NULL) {
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perror("failed to do fdopen on stdin");
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exit(1);
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}
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if ((fp2 = fdopen(fd2, "wb")) == NULL) {
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perror("failed to do fdopen on stdout");
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exit(1);
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}
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while (fgets(buffer, BUFFERSIZE, fp1) != NULL) {
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if (fputs(buffer, fp2) == EOF) {
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perror("fputs failed for stdout");
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exit(1);
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}
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}
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if (ferror(fp1)) {
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perror("error while reading from stdin");
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exit(1);
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}
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fclose(fp1);
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fclose(fp2);
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fprintf(stderr,"done\n");
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return 0;
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}
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