munmap(2) System Calls Manual munmap(2)Name
munmap - unmaps memory of a character device
Syntax
#include <sys/types.h>
#include <sys/mman.h>
caddr_t munmap(addr, len)
caddr_t addr;
size_t len;
Arguments
addr Specifies the address space of the calling process at which the unmapping begins.
len Specifies the number of bytes to unmap.
Description
The system call unmaps a specified number of bytes (len) starting at a specified address (addr) from the address space of the calling
process. You mapped this device in a previous call to Subsequent access to the unmapped region results in a signal. You cannot unmap
data, stack, and text segments using
The system call rounds len to the nearest multiple of page size as returned by
The range [addr, addr + len] may contain more than one mapped region created by In this case, unmaps all of the mapped regions.
Restrictions
All of the mapped regions must be wholly contained in the range [addr, addr + len]. That is, addr must be the beginning of some mapped
region and addr + len must be the end of some (possibly different) mapped region.
Return Value
If successful, returns 0. Otherwise, it returns -1 and sets the errno argument to one of the errors listed in the Diagnostics section.
Diagnostics
The call to fails if one or more of the following is true:
[EINVAL] The address you specified in addr is not a multiple of the page size as returned by
[EINVAL] The addresses in the range [addr, addr + len] are not valid in the process address space.
[EINVAL] All of the segments being unmapped are not entirely contained in the range [addr, addr + len].
See Alsogetpagesize(2), getsysinfo(2), mmap(2)munmap(2)
Check Out this Related Man Page
MUNMAP(2) BSD System Calls Manual MUNMAP(2)NAME
munmap -- remove a mapping
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <sys/mman.h>
int
munmap(void *addr, size_t len);
DESCRIPTION
The munmap() system call deletes the mappings for the specified address range, and causes further references to addresses within the range to
generate invalid memory references.
RETURN VALUES
The munmap() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate
the error.
ERRORS
The munmap() system call will fail if:
[EINVAL] The addr argument was not page aligned, the len argument was zero or negative, or some part of the region being unmapped
is outside the valid address range for a process.
SEE ALSO madvise(2), mincore(2), mmap(2), mprotect(2), msync(2), getpagesize(3)HISTORY
The munmap() system call first appeared in 4.4BSD.
BSD May 27, 1994 BSD
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Hey guys,
Does anyone know how to calculate total number of mapped reads for a certain region of a bam file using samtools flagstat?
I know to use flagstat for the whole bam file. but for a specific region of it... is there an option?
Tnx
---------- Post updated at 12:27 PM ----------... (1 Reply)
Here's my code.
21 if ; then
22
23 ls addr*.tmp | while IFS= read -r entry; do # Starts Reading .cfg files one by one ...
24 echo $entry
I get the below error at line number 21
line 21:
Can you tell me how can i alter my code to avoid the error ? (3 Replies)