Specifications

You can use the following values for the input parameter, whence:
• SEEK_SET—The offset is set to ptr bytes.
• SEEK_CUR—The offset is incremented by ptr bytes.
• SEEK_END—The offset is set to the end of the file plus ptr bytes.
Calls to lseek() are thread-safe only if the implementation of lseek() provided by the driver that is
manipulated is thread-safe.
Valid values for the fd parameter are: stdout, stdin, and stderr, or any value returned from a call to
open().
Return
On success, the return value is a nonnegative file pointer. The return value is –1 in the event of an error. If
the call fails, errno is set to indicate the cause of the error.
Related Information
• fcntl() on page 14-57
• fstat() on page 14-55
• ioctl() on page 14-73
• isatty() on page 14-74
• open() on page 14-66
• read() on page 14-68
• stat() on page 14-60
• write() on page 14-69
• newlib Library Documentation
alt_sysclk_init()
Prototype
int alt_sysclk_init (alt_u32 nticks)
Commonly Called By
Device drivers
Thread-safe
No.
Available from ISR
No.
Include
<sys/alt_alarm.h>
Description
The alt_sysclk_init() function registers the presence of a system clock driver. The input argument is
the number of ticks per second at which the system clock is run.
NII5V2
2015.05.14
alt_sysclk_init()
14-65
HAL API Reference
Altera Corporation
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