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Check for the most basic filename overlaps

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Check for the most basic filename overlaps, in case we have the
opportunity to save the user from himself.
This commit is contained in:
H. Peter Anvin 2007-10-01 11:26:31 -07:00
parent fcce07f171
commit 59ddd26aac
1 changed files with 19 additions and 10 deletions
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29
nasm.c
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@ -780,16 +780,25 @@ static void parse_cmdline(int argc, char **argv)
if (!*inname)
report_error(ERR_NONFATAL | ERR_NOFILE | ERR_USAGE,
"no input file specified");
else {
if (*errname) {
error_file = fopen(errname, "w");
if (!error_file) {
error_file = stderr; /* Revert to default! */
report_error(ERR_FATAL | ERR_NOFILE | ERR_USAGE,
"cannot open file `%s' for error messages",
errname);
}
}
/* Look for basic command line typos. This definitely doesn't
catch all errors, but it might help cases of fumbled fingers. */
if ((errname && !strcmp(inname, errname)) ||
(outname && !strcmp(inname, outname)) ||
(listname && !strcmp(inname, listname))) {
report_error(ERR_FATAL | ERR_NOFILE | ERR_USAGE,
"file `%s' is both input and output file",
inname);
}
if (*errname) {
error_file = fopen(errname, "w");
if (!error_file) {
error_file = stderr; /* Revert to default! */
report_error(ERR_FATAL | ERR_NOFILE | ERR_USAGE,
"cannot open file `%s' for error messages",
errname);
}
}
}