61 lines
955 B
C
61 lines
955 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include <cpm.h>
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#include "cpmsys.h"
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int open(const char* path, int access, ...)
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{
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uint8_t fd = 0;
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struct FCBE* fcbe = &__fd[0];
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uint8_t olduser;
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__init_file_descriptors();
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while (fd != NUM_FILE_DESCRIPTORS)
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{
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if (fcbe->fcb.f[0] == 0)
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break;
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fd++;
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fcbe++;
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}
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if (fd == NUM_FILE_DESCRIPTORS)
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{
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errno = EMFILE;
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return -1;
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}
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fcbe->user = cpm_parse_filename(&fcbe->fcb, path);
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olduser = cpm_get_user();
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cpm_set_user(fcbe->user);
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if (access & O_TRUNC)
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{
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cpm_delete_file(&fcbe->fcb);
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access |= O_CREAT;
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}
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if (access & O_CREAT)
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{
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if (cpm_make_file(&fcbe->fcb) == 0xff)
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goto eio;
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}
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else
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{
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if (cpm_open_file(&fcbe->fcb) == 0xff)
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goto eio;
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}
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cpm_seek_to_end(&fcbe->fcb);
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fcbe->length = U16(fcbe->fcb.r);
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if (!(access & O_APPEND))
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U16(fcbe->fcb.r) = 0;
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return fd;
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eio:
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fcbe->fcb.f[0] = 0;
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errno = EIO;
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return -1;
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}
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