56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
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#include "fs.h"
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#include <minix/callnr.h>
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#include <minix/com.h>
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#include "inode.h"
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#include <minix/vfsif.h>
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/*===========================================================================*
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* fs_utime *
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*===========================================================================*/
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PUBLIC int fs_utime()
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{
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register struct inode *rip;
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register int r;
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caller_uid = fs_m_in.REQ_UID;
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caller_gid = fs_m_in.REQ_GID;
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/* Temporarily open the file. */
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if ( (rip = get_inode(fs_dev, fs_m_in.REQ_INODE_NR)) == NIL_INODE) {
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printf("MFS(%d) get_inode by fs_utime() failed\n", SELF_E);
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return(EINVAL);
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}
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/* Only the owner of a file or the super_user can change its time. */
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r = OK;
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if (rip->i_uid != caller_uid && caller_uid != SU_UID) r = EPERM;
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if (fs_m_in.REQ_ACTIME == 0 && r != OK) r = forbidden(rip, W_BIT);
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if (read_only(rip) != OK) r = EROFS; /* not even su can touch if R/O */
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if (r == OK) {
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if (fs_m_in.REQ_ACTIME == 0) {
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rip->i_atime = fs_m_in.REQ_MODTIME;
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rip->i_mtime = rip->i_atime;
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} else {
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rip->i_atime = fs_m_in.REQ_ACTIME;
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rip->i_mtime = fs_m_in.REQ_MODTIME;
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}
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rip->i_update = CTIME; /* discard any stale ATIME and MTIME flags */
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rip->i_dirt = DIRTY;
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}
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put_inode(rip);
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return(r);
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}
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PUBLIC int fs_stime()
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{
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boottime = fs_m_in.REQ_BOOTTIME;
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return OK;
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}
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