jehanne/qa/lib/newlib/100-files.c

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#include <stdio.h>
int
main(int argc, char** argv) {
FILE *fp;
int i;
char * output = "/tmp/io-test.txt";
if(argc == 2){
output = argv[1];
}else if(argc > 2){
printf("usage: %s [output]", argv[0]);
return 100;
}
fp = fopen(output, "w+");
if(fp == NULL){
printf("Can't open %s", output);
return 1;
}
i = fprintf(fp, "%s works.\n", "fprintf");
if(i <= 0){
fclose(fp);
printf("Can't write 'fprintf works.' to %s (fprintf returned %d)", output, i);
return 2;
}
i = fputs("fputs works.\n", fp);
if(i == EOF){
fclose(fp);
printf("Can't write 'fputs works.' to %s (fputs returned EOF)", output);
return 3;
}
fclose(fp);
return 0;
}