41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
#if !defined(lint) && defined(SCCSIDS)
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static char sccsid[] = "@(#)utime.c 1.1 92/07/30 SMI"; /* from UCB 4.2 83/05/31 */
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#endif
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#include <sys/types.h>
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#include <sys/time.h>
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extern long time();
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/*
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* Backwards compatible utime.
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*
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* The System V system call allows any user with write permission
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* on a file to set the accessed and modified times to the current
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* time; they specify this by passing a null pointer to "utime".
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* This is done to simulate reading one byte from a file and
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* overwriting that byte with itself, which is the technique used
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* by older versions of the "touch" command. The advantage of this
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* hack in the system call is that it works correctly even if the file
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* is zero-length.
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*
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* The BSD system call never allowed a null pointer so there should
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* be no compatibility problem there.
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*/
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utime(name, otv)
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char *name;
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time_t otv[2];
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{
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struct timeval tv[2];
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if (otv == 0) {
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return (utimes(name, (struct timeval *)0));
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} else {
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tv[0].tv_sec = (long)otv[0];
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tv[0].tv_usec = 0;
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tv[1].tv_sec = (long)otv[1];
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tv[1].tv_usec = 0;
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}
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return (utimes(name, tv));
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}
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