Not sure. As F[ ] elements are created when referenced, memory may become exhausted, but then the error msg should complain about memory allocation problems. Try this:
Hi,
I'm trying to download a compatible Oracle Client software for a HP-UX machine. I'd like to know if ...
1) HP-UX is 32 bit or 64 bit?
2) Processor type - Itanium or regular?
when I execute uname -a I get
HP-UX B.11.11 U 9000/800 728684161 unlimited-user license
Based on the... (7 Replies)
I need to process 4 files having name pattern as followis:-
1) Each file starts with = ABCJmdmfbsjop letters + 7 Digit Number _mm-dd-yyyy-hh-mm-ss-3 Digit Number.data
where ABCJmdmfbsjop :- is alphabet. Each file starts with this ABCJmdmfbsjop alphabet.
7 Digit Number :- Numeric 7 digits.
__:-... (1 Reply)
Hi Guys!
Could anyone help me with?..
I have a line which says
BCVGF%6$#900 .....How can we know which position is for % or say $ by command or script?There is any way to get a prompt by any script?
Thanks a lot (6 Replies)
Hi All,
I am writing a script where the first 5 parameters are mandatory but the script should be able to handle a maximum of 9 parameters (with the remainig 4 optional)
I would like to load all parameters from 5th parameter positioninto an array.
the piece of code I am writing for this:... (0 Replies)
Hi,
I have one script in my cronjob, which is fetching file from a ftp site and making a copy with today's date and time. This is a new setup. There was a instance when test_bill.txt was not present on ftp.xxxx_xxxx.com and when this job ran and did not fetched file, still it send mail of... (5 Replies)
I need to grab information from the output of the ps command.
For each line of ps output that contains _progres -b I need to get the word that follows -p. The "-p" can be anywhere after "_progres -b".
Using grep to select the correct lines is no problem (e.g. ps -ef|grep "_progres \-b|grep -v... (3 Replies)
Dear Experts,
I need your help here. I have lot of teradata DDL's as follows, i want to extract field names , field attributes and NOT NULL information from DDL.Could you please help here.
Sample DDL:
CREATE MULTISET TABLE APS_CALL_IN_PICKUP_CANCELED ,NO FALLBACK ,
NO BEFORE... (2 Replies)
Hi,
I have a file with multiple lines(fixed width dat file). I want to search for '02' in the positions 45-46 and if available, in that lines, I need to replace value in position 359 with blank. As I am new to unix, I am not able to figure out how to do this. Can you please help me to achieve... (9 Replies)
Discussion started by: Pradhikshan
9 Replies
LEARN ABOUT NETBSD
free
MALLOC(3) BSD Library Functions Manual MALLOC(3)NAME
malloc, calloc, realloc, free -- general purpose memory allocation functions
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdlib.h>
void *
malloc(size_t size);
void *
calloc(size_t number, size_t size);
void *
realloc(void *ptr, size_t size);
void
free(void *ptr);
DESCRIPTION
The malloc() function allocates size bytes of uninitialized memory. The allocated space is suitably aligned (after possible pointer coer-
cion) for storage of any type of object.
The calloc() function allocates space for number objects, each size bytes in length. The result is identical to calling malloc() with an
argument of ``number * size'', with the exception that the allocated memory is explicitly initialized to zero bytes.
The realloc() function changes the size of the previously allocated memory referenced by ptr to size bytes. The contents of the memory are
unchanged up to the lesser of the new and old sizes. If the new size is larger, the value of the newly allocated portion of the memory is
undefined. Upon success, the memory referenced by ptr is freed and a pointer to the newly allocated memory is returned. Note that realloc()
may move the memory allocation, resulting in a different return value than ptr. If ptr is NULL, the realloc() function behaves identically
to malloc() for the specified size.
The free() function causes the allocated memory referenced by ptr to be made available for future allocations. If ptr is NULL, no action
occurs.
RETURN VALUES
The malloc() and calloc() functions return a pointer to the allocated memory if successful; otherwise a NULL pointer is returned and errno is
set to ENOMEM.
The realloc() function returns a pointer, possibly identical to ptr, to the allocated memory if successful; otherwise a NULL pointer is
returned, and errno is set to ENOMEM if the error was the result of an allocation failure. The realloc() function always leaves the original
buffer intact when an error occurs.
The free() function returns no value.
EXAMPLES
When using malloc(), be careful to avoid the following idiom:
if ((p = malloc(number * size)) == NULL)
err(EXIT_FAILURE, "malloc");
The multiplication may lead to an integer overflow. To avoid this, calloc() is recommended.
If malloc() must be used, be sure to test for overflow:
if (size && number > SIZE_MAX / size) {
errno = EOVERFLOW;
err(EXIT_FAILURE, "allocation");
}
When using realloc(), one must be careful to avoid the following idiom:
nsize += 50;
if ((p = realloc(p, nsize)) == NULL)
return NULL;
Do not adjust the variable describing how much memory has been allocated until it is known that the allocation has been successful. This can
cause aberrant program behavior if the incorrect size value is used. In most cases, the above example will also leak memory. As stated ear-
lier, a return value of NULL indicates that the old object still remains allocated. Better code looks like this:
newsize = size + 50;
if ((p2 = realloc(p, newsize)) == NULL) {
if (p != NULL)
free(p);
p = NULL;
return NULL;
}
p = p2;
size = newsize;
SEE ALSO madvise(2), mmap(2), sbrk(2), alloca(3), atexit(3), getpagesize(3), memory(3), posix_memalign(3)
For the implementation details, see jemalloc(3).
STANDARDS
The malloc(), calloc(), realloc() and free() functions conform to ISO/IEC 9899:1990 (``ISO C90'').
BSD May 3, 2010 BSD