Mail Archives: djgpp/1999/05/23/18:20:49
in an ANSI C program, I am attempting to create and open a read/write
binary file as follows:
I use fopen() to open the file in mode "ab". This should leave the file
alone if it already exists;
After this, I use freopen() to open the same file in mode "rab+", which -
to my knowledge, should allow me complete read/write access to the newly
created file.
Here's the prob: this works fine if the file already exists: I get the
access i wanted in the first place. If the file did not exist in the
beginning, the file is created but when I attempt to write I get an ENOENT
error, which seems odd to me, as the file has just been created.
My question: is the method I am using just too slick for DJGPP, is it an
error in my warped mind, or is there something really wrong here?
Here's an overview in code-form:
FILE *filename;
filename = fopen("foo", "ab");
if ((filename = freopen("foo", "rab+", filename)) == NULL) {
perror("foo");
} // if
The reason I'm doing it like this in the first place, is that, though a in
the mode should create the file if it isn't there, rab+ results in ENOENT
if the file isn't there. This _only_ produces an error when, immediatly
after this operation, I try to write.
If anyone can point out my mistake - or GCCs - I'd be much obliged..
Greetz!
Dlanor
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