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Kernel: Implement fchdir syscall
The fchdir() function is equivalent to chdir() except that the directory that is to be the new current working directory is specified by a file descriptor.
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26e81ad574
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6 changed files with 24 additions and 0 deletions
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@ -1202,6 +1202,19 @@ int Process::sys$chdir(const char* path)
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return 0;
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}
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int Process::sys$fchdir(int fd)
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{
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auto* description = file_description(fd);
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if (!description)
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return -EBADF;
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if (!description->is_directory())
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return -ENOTDIR;
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m_cwd = description->custody();
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return 0;
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}
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int Process::sys$getcwd(char* buffer, ssize_t size)
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{
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if (size < 0)
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@ -152,6 +152,7 @@ public:
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ssize_t sys$get_dir_entries(int fd, void*, ssize_t);
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int sys$getcwd(char*, ssize_t);
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int sys$chdir(const char*);
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int sys$fchdir(int fd);
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int sys$sleep(unsigned seconds);
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int sys$usleep(useconds_t usec);
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int sys$gettimeofday(timeval*);
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@ -136,6 +136,8 @@ static u32 handle(RegisterDump& regs, u32 function, u32 arg1, u32 arg2, u32 arg3
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break;
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case Syscall::SC_chdir:
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return current->process().sys$chdir((const char*)arg1);
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case Syscall::SC_fchdir:
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return current->process().sys$fchdir((int)arg1);
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case Syscall::SC_uname:
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return current->process().sys$uname((utsname*)arg1);
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case Syscall::SC_set_mmap_name:
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@ -32,6 +32,7 @@ struct timeval;
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__ENUMERATE_SYSCALL(gettimeofday) \
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__ENUMERATE_SYSCALL(gethostname) \
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__ENUMERATE_SYSCALL(chdir) \
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__ENUMERATE_SYSCALL(fchdir) \
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__ENUMERATE_SYSCALL(uname) \
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__ENUMERATE_SYSCALL(set_mmap_name) \
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__ENUMERATE_SYSCALL(readlink) \
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