Abswrite() : Write absolute disk sectors in C [dos.h function]
Declaration : abswrite()
int abswrite(int drive,int nsects,long lsect,void *buffer);
Remarks:
- abswrite uses DOS interrupt 0x26 to read specific disk sectors.
- abswrite writes absolute disk sectors
- It ignores the logical structure of a disk and pay no attention to files, FATs, or directories.
- The number of sectors to read is limited to 64K or the size of the buffer, whichever is smaller.
- If used improperly, abswrite can overwrite files, directories, and FATs.
Parameters
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| Parameter |
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| What It Is/Does ? |
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| drive |
| Drive number to read (or write): 0 = A |
1 = B |
etc. |
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| nsects |
| Number of sectors to read (or write) |
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| lsect |
| Beginning logical sector number |
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| buffer |
| Memory address where the data is to be read (or written) |
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Return Value:
- On success, return 0.
- On error, return -1 and set errno to the value of the AX register returned by the system call.
