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This adds simple command-line parsing to sandbox. The idea is that it sets up the state with options provided, and this state can then be queried later, as needed. New flags are declared with the SB_CMDLINE_OPT_SHORT helper macro, pointers are automatically gathered up in a special section, and then the core code takes care of gathering them up and processing at runtime. This way there is no central place where we have to store a list of flags with ifdefs. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
139 lines
3.7 KiB
C
139 lines
3.7 KiB
C
/*
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* Operating System Interface
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*
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* This provides access to useful OS routines for the sandbox architecture.
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* They are kept in a separate file so we can include system headers.
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*
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* Copyright (c) 2011 The Chromium OS Authors.
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef __OS_H__
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#define __OS_H__
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struct sandbox_state;
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/**
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* Access to the OS read() system call
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*
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* \param fd File descriptor as returned by os_open()
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* \param buf Buffer to place data
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* \param count Number of bytes to read
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* \return number of bytes read, or -1 on error
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*/
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ssize_t os_read(int fd, void *buf, size_t count);
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/**
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* Access to the OS write() system call
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*
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* \param fd File descriptor as returned by os_open()
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* \param buf Buffer containing data to write
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* \param count Number of bytes to write
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* \return number of bytes written, or -1 on error
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*/
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ssize_t os_write(int fd, const void *buf, size_t count);
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/**
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* Access to the OS lseek() system call
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*
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* \param fd File descriptor as returned by os_open()
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* \param offset File offset (based on whence)
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* \param whence Position offset is relative to (see below)
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* \return new file offset
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*/
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off_t os_lseek(int fd, off_t offset, int whence);
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/* Defines for "whence" in os_lseek() */
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#define OS_SEEK_SET 0
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#define OS_SEEK_CUR 1
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#define OS_SEEK_END 2
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/**
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* Access to the OS open() system call
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*
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* \param pathname Pathname of file to open
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* \param flags Flags, like O_RDONLY, O_RDWR
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* \return file descriptor, or -1 on error
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*/
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int os_open(const char *pathname, int flags);
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#define OS_O_RDONLY 0
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#define OS_O_WRONLY 1
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#define OS_O_RDWR 2
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#define OS_O_MASK 3 /* Mask for read/write flags */
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#define OS_O_CREAT 0100
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/**
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* Access to the OS close() system call
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*
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* \param fd File descriptor to close
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* \return 0 on success, -1 on error
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*/
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int os_close(int fd);
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/**
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* Access to the OS exit() system call
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*
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* This exits with the supplied return code, which should be 0 to indicate
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* success.
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*
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* @param exit_code exit code for U-Boot
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*/
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void os_exit(int exit_code);
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/**
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* Put tty into raw mode to mimic serial console better
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*/
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void os_tty_raw(int fd);
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/**
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* Acquires some memory from the underlying os.
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*
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* \param length Number of bytes to be allocated
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* \return Pointer to length bytes or NULL on error
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*/
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void *os_malloc(size_t length);
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/**
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* Access to the usleep function of the os
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*
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* \param usec Time to sleep in micro seconds
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*/
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void os_usleep(unsigned long usec);
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/**
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* Gets a monotonic increasing number of nano seconds from the OS
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*
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* \return A monotonic increasing time scaled in nano seconds
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*/
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u64 os_get_nsec(void);
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/**
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* Parse arguments and update sandbox state.
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*
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* @param state Sandbox state to update
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* @param argc Argument count
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* @param argv Argument vector
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* @return 0 if ok, and program should continue;
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* 1 if ok, but program should stop;
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* -1 on error: program should terminate.
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*/
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int os_parse_args(struct sandbox_state *state, int argc, char *argv[]);
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#endif
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