mirror of
https://git.proxmox.com/git/wasi-libc
synced 2025-06-13 15:56:16 +00:00
a94d2d04e7
* Add an entrypoint for calling open that bypasses the varargs. * Add an entrypoint for calling openat that bypasses the varargs.
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
#ifdef __wasilibc_unmodified_upstream // WASI has no syscall
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#else
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#include <unistd.h>
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#include <wasi/libc.h>
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#endif
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#include "stdio_impl.h"
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#include <fcntl.h>
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#include <string.h>
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#include <errno.h>
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FILE *fopen(const char *restrict filename, const char *restrict mode)
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{
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FILE *f;
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int fd;
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int flags;
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/* Check for valid initial mode character */
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if (!strchr("rwa", *mode)) {
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errno = EINVAL;
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return 0;
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}
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/* Compute the flags to pass to open() */
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flags = __fmodeflags(mode);
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#ifdef __wasilibc_unmodified_upstream // WASI has no sys_open
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fd = sys_open(filename, flags, 0666);
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#else
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// WASI libc ignores the mode parameter anyway, so skip the varargs.
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fd = __wasilibc_open_nomode(filename, flags);
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#endif
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if (fd < 0) return 0;
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#ifdef __wasilibc_unmodified_upstream // WASI has no syscall
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if (flags & O_CLOEXEC)
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__syscall(SYS_fcntl, fd, F_SETFD, FD_CLOEXEC);
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#else
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/* Avoid __syscall, but also, FD_CLOEXEC is not supported in WASI. */
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#endif
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f = __fdopen(fd, mode);
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if (f) return f;
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#ifdef __wasilibc_unmodified_upstream // WASI has no syscall
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__syscall(SYS_close, fd);
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#else
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close(fd);
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#endif
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return 0;
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}
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weak_alias(fopen, fopen64);
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