107 lines
2.9 KiB
C
107 lines
2.9 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* fd.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: rparodi <rparodi@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2024/07/30 16:17:17 by rparodi #+# #+# */
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/* Updated: 2024/08/05 15:19:17 by maiboyer ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "me/fs/fs.h"
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#include "me/mem/mem.h"
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#include "me/str/str.h"
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#include "me/types.h"
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#include "unistd.h"
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#include <dirent.h>
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#include <errno.h>
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#include <stdio.h>
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#include <sys/stat.h>
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t_fd *open_fd(t_str name, t_fd_perm perms, t_file_open_option open_options,
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t_file_perm file_perm)
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{
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t_fd *fd;
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struct s_file_slot *slot;
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int actual_perms;
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if (perms & FD_READ && perms & FD_WRITE)
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actual_perms = O_RDWR;
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else if (perms & FD_READ)
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actual_perms = O_RDONLY;
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else if (perms & FD_WRITE)
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actual_perms = O_WRONLY;
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else
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return (NULL);
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actual_perms |= open_options;
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slot = get_unused_fd_slot();
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fd = &slot->slot.fd;
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fd->fd = open(name, actual_perms, file_perm);
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if (fd->fd == -1)
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return (fd->fd = 0, NULL);
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slot->ty = SLOT_FD;
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fd->name = str_clone(name);
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fd->perms = perms;
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fd->type = FD_FILE;
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return (fd);
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}
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t_error read_fd(t_fd *fd, t_u8 *buffer, t_usize size, t_isize *read_count)
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{
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t_isize ret;
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t_isize false_ret;
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if (read_count == NULL)
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read_count = &false_ret;
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if (fd == NULL || buffer == NULL || fd->fd == -1 || \
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!(fd->perms & FD_READ))
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return (ERROR);
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ret = read(fd->fd, buffer, size);
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if (ret == -1)
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return (ERROR);
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*read_count = ret;
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return (NO_ERROR);
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}
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t_error write_fd(t_fd *fd, t_u8 *buffer, t_usize size, t_isize *write_count)
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{
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t_isize ret;
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t_isize fake_ret;
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if (write_count == NULL)
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write_count = &fake_ret;
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if (fd == NULL || buffer == NULL || fd->fd == -1 || !(fd->perms & FD_WRITE))
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return (ERROR);
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ret = write(fd->fd, buffer, size);
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if (ret == -1)
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return (ERROR);
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*write_count = ret;
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return (NO_ERROR);
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}
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t_error stat_fd(t_fd *fd, t_stat *stat)
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{
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if (fd == NULL || stat == NULL || fd->fd == -1)
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return (ERROR);
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if (fstat(fd->fd, stat) == -1)
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return (ERROR);
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return (NO_ERROR);
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}
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void close_fd(t_fd *fd)
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{
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struct s_file_slot *slot;
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if (fd == NULL)
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return ;
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if (close(fd->fd) == -1)
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return ;
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if (fd->name != NULL)
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mem_free(fd->name);
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slot = (void *)(fd)-offsetof(struct s_file_slot, slot.fd);
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mem_set_zero(slot, sizeof(*slot));
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slot->ty = SLOT_UNUSED;
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}
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