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Fix os/open with :rw permissions on posix.

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This commit is contained in:
Calvin Rose 2022-10-24 19:39:41 -05:00
parent e731996a68
commit 60e0f32f1a
1 changed files with 13 additions and 6 deletions
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19
src/core/os.c
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@ -2137,20 +2137,18 @@ JANET_CORE_FN(os_open,
#ifdef JANET_LINUX
open_flags |= O_CLOEXEC;
#endif
int read_flag = 0;
int write_flag = 0;
for (const uint8_t *c = opt_flags; *c; c++) {
switch (*c) {
default:
break;
case 'r':
open_flags = (open_flags & O_WRONLY)
? ((open_flags & ~O_WRONLY) | O_RDWR)
: (open_flags | O_RDONLY);
read_flag = 1;
stream_flags |= JANET_STREAM_READABLE;
break;
case 'w':
open_flags = (open_flags & O_RDONLY)
? ((open_flags & ~O_RDONLY) | O_RDWR)
: (open_flags | O_WRONLY);
write_flag = 1;
stream_flags |= JANET_STREAM_WRITABLE;
break;
case 'c':
@ -2174,6 +2172,15 @@ JANET_CORE_FN(os_open,
break;
}
}
/* If both read and write, fix up to O_RDWR */
if (read_flag && !write_flag) {
open_flags |= O_RDONLY;
} else if (write_flag && !read_flag) {
open_flags |= O_WRONLY;
} else {
open_flags = O_RDWR;
}
do {
fd = open(path, open_flags, mode);
} while (fd == -1 && errno == EINTR);