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-
- TRUNCATE(2) UNIX Programmer's Manual TRUNCATE(2)
-
- NNAAMMEE
- ttrruunnccaattee - truncate a file to a specified length
-
- SSYYNNOOPPSSIISS
- ##iinncclluuddee <<uunniissttdd..hh>>
-
- _i_n_t
- ttrruunnccaattee(_c_o_n_s_t _c_h_a_r _*_p_a_t_h, _o_f_f___t _l_e_n_g_t_h)
-
- _i_n_t
- ffttrruunnccaattee(_i_n_t _f_d, _o_f_f___t _l_e_n_g_t_h)
-
- DDEESSCCRRIIPPTTIIOONN
- TTrruunnccaattee() causes the file named by _p_a_t_h or referenced by _f_d to be trun
- cated to at most _l_e_n_g_t_h bytes in size. If the file previously was larger
- than this size, the extra data is lost. With ffttrruunnccaattee(), the file must
- be open for writing.
-
- RREETTUURRNN VVAALLUUEESS
- A value of 0 is returned if the call succeeds. If the call fails a 1 is
- returned, and the global variable _e_r_r_n_o specifies the error.
-
- EERRRROORRSS
- TTrruunnccaattee() succeeds unless:
-
- [ENOTDIR] A component of the path prefix is not a directory.
-
- [EINVAL] The pathname contains a character with the highorder bit set.
-
- [ENAMETOOLONG]
- A component of a pathname exceeded 255 characters, or an en
- tire path name exceeded 1023 characters.
-
- [ENOENT] The named file does not exist.
-
- [EACCES] Search permission is denied for a component of the path pre
- fix.
-
- [EACCES] The named file is not writable by the user.
-
- [ELOOP] Too many symbolic links were encountered in translating the
- pathname.
-
- [EISDIR] The named file is a directory.
-
- [EROFS] The named file resides on a readonly file system.
-
- [ETXTBSY] The file is a pure procedure (shared text) file that is being
- executed.
-
- [EIO] An I/O error occurred updating the inode.
-
- [EFAULT] _P_a_t_h points outside the process's allocated address space.
-
- FFttrruunnccaattee() succeeds unless:
-
- [EBADF] The _f_d is not a valid descriptor.
-
- [EINVAL] The _f_d references a socket, not a file.
-
- [EINVAL] The _f_d is not open for writing.
-
- SSEEEE AALLSSOO
- open(2)
-
- BBUUGGSS
- These calls should be generalized to allow ranges of bytes in a file to
- be discarded.
-
- HHIISSTTOORRYY
- The ttrruunnccaattee function call appeared in 4.2BSD.
-
- 4.2 Berkeley Distribution March 10, 1991 2
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