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gzip, gunzip: warning rather than error when output file already exists

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This matches the behavior of GNU gzip.
This commit is contained in:
Eric Biggers 2016-10-23 13:54:53 -07:00
parent 618958f4dd
commit e4029d1e70
1 changed files with 4 additions and 1 deletions
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5
programs/prog_util.c
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@ -234,6 +234,8 @@ xopen_for_read(const tchar *path, struct file_stream *strm)
int
xopen_for_write(const tchar *path, bool overwrite, struct file_stream *strm)
{
int ret = -1;
strm->mmap_mem = NULL;
if (path == NULL) {
@ -263,6 +265,7 @@ retry:
if (!isatty(STDERR_FILENO) || !isatty(STDIN_FILENO)) {
msg("%"TS" already exists; use -f to overwrite",
strm->name);
ret = -2; /* warning only */
goto err;
}
fprintf(stderr, "%"TS": %"TS" already exists; "
@ -284,7 +287,7 @@ retry:
err:
free(strm->name);
return -1;
return ret;
}
/* Map the contents of a file into memory */