c8c0844f7f
I intend to add more Linux workarounds that depend on using these pathnames, and some of them will be in "syscall" functions that, from an anti-bloat standpoint, should not depend on the whole snprintf framework.
37 lines
928 B
C
37 lines
928 B
C
#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <stdio.h>
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#include "syscall.h"
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void __procfdname(char *, unsigned);
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int fchmodat(int fd, const char *path, mode_t mode, int flag)
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{
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if (!flag) return syscall(SYS_fchmodat, fd, path, mode, flag);
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if (flag != AT_SYMLINK_NOFOLLOW)
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return __syscall_ret(-EINVAL);
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struct stat st;
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int ret, fd2;
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char proc[15+3*sizeof(int)];
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if ((ret = __syscall(SYS_fstatat, fd, path, &st, flag)))
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return __syscall_ret(ret);
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if (S_ISLNK(st.st_mode))
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return __syscall_ret(-EOPNOTSUPP);
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if ((fd2 = __syscall(SYS_openat, fd, path, O_RDONLY|O_PATH|O_NOFOLLOW|O_NOCTTY)) < 0) {
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if (fd2 == -ELOOP)
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return __syscall_ret(-EOPNOTSUPP);
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return __syscall_ret(fd2);
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}
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__procfdname(proc, fd2);
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if (!(ret = __syscall(SYS_stat, proc, &st)) && !S_ISLNK(st.st_mode))
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ret = __syscall(SYS_chmod, proc, mode);
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__syscall(SYS_close, fd2);
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return __syscall_ret(ret);
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}
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