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https://github.com/RGBCube/serenity
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Kernel+LibC: Implement readlinkat(2)
Co-Authored-By: Daniel Bertalan <dani@danielbertalan.dev>
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parent
9850a69cd1
commit
6445a706cf
6 changed files with 16 additions and 6 deletions
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@ -105,7 +105,8 @@ int serenity_readlink(char const* path, size_t path_length, char* buffer, size_t
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{
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Syscall::SC_readlink_params small_params {
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{ path, path_length },
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{ buffer, buffer_size }
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{ buffer, buffer_size },
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AT_FDCWD
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};
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int rc = syscall(SC_readlink, &small_params);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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@ -630,10 +630,16 @@ int sethostname(char const* hostname, ssize_t size)
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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// https://pubs.opengroup.org/onlinepubs/9699919799/functions/readlink.html
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// https://pubs.opengroup.org/onlinepubs/9699919799/functions/readlinkat.html
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ssize_t readlink(char const* path, char* buffer, size_t size)
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{
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Syscall::SC_readlink_params params { { path, strlen(path) }, { buffer, size } };
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return readlinkat(AT_FDCWD, path, buffer, size);
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}
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// https://pubs.opengroup.org/onlinepubs/9699919799/functions/readlinkat.html
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ssize_t readlinkat(int dirfd, char const* path, char* buffer, size_t size)
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{
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Syscall::SC_readlink_params params { { path, strlen(path) }, { buffer, size }, dirfd };
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int rc = syscall(SC_readlink, ¶ms);
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// Return the number of bytes placed in the buffer, not the full path size.
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__RETURN_WITH_ERRNO(rc, min((size_t)rc, size), -1);
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@ -88,6 +88,7 @@ int usleep(useconds_t);
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int gethostname(char*, size_t);
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int sethostname(char const*, ssize_t);
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ssize_t readlink(char const* path, char* buffer, size_t);
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ssize_t readlinkat(int dirfd, char const* path, char* buffer, size_t);
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char* ttyname(int fd);
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int ttyname_r(int fd, char* buffer, size_t);
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off_t lseek(int fd, off_t, int whence);
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