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support kernels with no SYS_open syscall, only SYS_openat

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open is handled specially because it is used from so many places, in
so many variants (2 or 3 arguments, setting errno or not, and
cancellable or not). trying to do it as a function would not only
increase bloat, but would also risk subtle breakage.

this is the first step towards supporting "new" archs where linux
lacks "old" syscalls.
This commit is contained in:
Rich Felker 2014-05-24 22:54:05 -04:00
commit 594c827a22
9 changed files with 26 additions and 10 deletions
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2
src/stdio/__fopen_rb_ca.c
View file

@ -6,7 +6,7 @@ FILE *__fopen_rb_ca(const char *filename, FILE *f, unsigned char *buf, size_t le
{
memset(f, 0, sizeof *f);
f->fd = syscall(SYS_open, filename, O_RDONLY|O_LARGEFILE|O_CLOEXEC, 0);
f->fd = sys_open(filename, O_RDONLY|O_CLOEXEC);
if (f->fd < 0) return 0;
f->flags = F_NOWR | F_PERM;

2
src/stdio/fopen.c
View file

@ -18,7 +18,7 @@ FILE *fopen(const char *restrict filename, const char *restrict mode)
/* Compute the flags to pass to open() */
flags = __fmodeflags(mode);
fd = syscall_cp(SYS_open, filename, flags|O_LARGEFILE, 0666);
fd = sys_open_cp(filename, flags, 0666);
if (fd < 0) return 0;
f = __fdopen(fd, mode);

2
src/stdio/tmpfile.c
View file

@ -14,7 +14,7 @@ FILE *tmpfile(void)
for (try=0; try<MAXTRIES; try++) {
s = tmpnam(buf);
if (!s) return 0;
fd = syscall(SYS_open, s, O_RDWR|O_CREAT|O_EXCL|O_LARGEFILE, 0600);
fd = sys_open(s, O_RDWR|O_CREAT|O_EXCL, 0600);
if (fd >= 0) {
f = __fdopen(fd, "w+");
__syscall(SYS_unlink, s);