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Top Forums Programming read() without changing atime ? Post 302113178 by tantric on Wednesday 4th of April 2007 03:25:16 AM
Old 04-04-2007
read() without changing atime ?

Hey,

First of all I want to know How do I see the atime of a file ?? Whats the command ??

I think ls -l shows the last modified time right ? Because when I use cat to read a file, the timestamp shown by ls -l does not change.

Its not ls -lu ! man ls did not help ! How do I see the last access time of a file in unix ???

Now my next question is:

My C program reads a file using read(). But I do not want the last access time of the file to change. So, I am using utime() to update the atime and mtime of the file back to what it was before the read.

But the problem, the update will fail if the program does not have write permissions on the file. If the file is read only, the program will not be able to modify its attributes (am I right ?).

can you guys please help me out here Smilie

thanks,
Varun
 

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libssh2_scp_send64(3)						  libssh2 manual					     libssh2_scp_send64(3)

NAME
libssh2_scp_send64 - Send a file via SCP SYNOPSIS
#include <libssh2.h> LIBSSH2_CHANNEL * libssh2_scp_send64(LIBSSH2_SESSION *session, const char *path, int mode, libssh2_uint64_t size, time_t mtime, time_t atime); DESCRIPTION
session - Session instance as returned by libssh2_session_init_ex(3) path - Full path and filename of file to transfer to. That is the remote file name. mode - File access mode to create file with size - Size of file being transmitted (Must be known ahead of time). Note that this needs to be passed on as variable type lib- ssh2_uint64_t. This type is 64 bit on modern operating systems and compilers. mtime - mtime to assign to file being created atime - atime to assign to file being created (Set this and mtime to zero to instruct remote host to use current time). Send a file to the remote host via SCP. RETURN VALUE
Pointer to a newly allocated LIBSSH2_CHANNEL instance, or NULL on errors. ERRORS
LIBSSH2_ERROR_ALLOC - An internal memory allocation call failed. LIBSSH2_ERROR_SOCKET_SEND - Unable to send data on socket. LIBSSH2_ERROR_SCP_PROTOCOL - LIBSSH2_ERROR_EAGAIN - Marked for non-blocking I/O but the call would block. AVAILABILITY
This function was added in libssh2 1.2.6 and is meant to replace the former libssh2_scp_send_ex(3) function. SEE ALSO
libssh2_channel_open_ex(3) libssh2 1.2.6 17 Apr 2010 libssh2_scp_send64(3)
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