58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
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#include "fs.h"
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#include <fcntl.h>
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#include <signal.h>
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#include <minix/callnr.h>
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#include <minix/endpoint.h>
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#include <minix/com.h>
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#include <sys/select.h>
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#include <sys/time.h>
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#include "inode.h"
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#include "super.h"
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#include <minix/vfsif.h>
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/*===========================================================================*
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* fs_pipe *
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*===========================================================================*/
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PUBLIC int fs_pipe(void)
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{
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struct inode *rip;
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/* Get caller's user and group id from the request */
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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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/* Try to allocate the inode */
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if ( (rip = alloc_inode(fs_dev, I_REGULAR) ) == NIL_INODE) {
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return err_code;
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}
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/* !!! already checked in alloc_inode
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if (read_only(rip) != OK)
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panic(__FILE__,"pipe device is read only", NO_NUM);
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*/
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/* Fill in the fields of the inode */
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rip->i_pipe = I_PIPE;
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rip->i_mode &= ~I_REGULAR;
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rip->i_mode |= I_NAMED_PIPE; /* pipes and FIFOs have this bit set */
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/* We'll need it twice, nothing can go wrong here */
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dup_inode(rip);
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rw_inode(rip, WRITING); /* mark inode as allocated */
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rip->i_update = ATIME | CTIME | MTIME;
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/* Fill in the fields of the response message */
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fs_m_out.m_source = fs_dev; /* filled with FS endpoint by the system */
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fs_m_out.RES_INODE_NR = rip->i_num;
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fs_m_out.RES_MODE = rip->i_mode;
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fs_m_out.RES_INODE_INDEX = (rip - &inode[0]) / sizeof(struct inode);
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return OK;
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}
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