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Use dynamic calling for fallocate to allow sparse to compile in old Linux.

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Natalia Portillo
2021-05-11 21:56:18 +01:00
parent 4e60409954
commit 056af1e1fc
3 changed files with 57 additions and 8 deletions
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25
setter/src/unix/linux/sparse.c
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@@ -24,6 +24,7 @@ Copyright (C) 2011-2021 Natalia Portillo
#include "../../include/consts.h"
#define _GNU_SOURCE
#include <dlfcn.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
@@ -34,14 +35,24 @@ Copyright (C) 2011-2021 Natalia Portillo
#include "../../log.h"
#include "linux.h"
#include "sparse.h"
void LinuxSparse(const char* path)
{
int ret;
int rc, wRc, cRc, zRc;
FILE* h;
int i;
int fd;
int ret;
int rc, wRc, cRc, zRc;
FILE* h;
int i;
int fd;
_linux_fallocate linux_fallocate;
linux_fallocate = (_linux_fallocate)dlsym(RTLD_DEFAULT, "fallocate");
if(!linux_fallocate)
{
log_write("Error loading fallocate(2) from libc: %s\n", dlerror());
return;
}
ret = chdir(path);
@@ -88,7 +99,7 @@ void LinuxSparse(const char* path)
}
fd = fileno(h);
ret = fallocate(fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 4096, 8192);
ret = linux_fallocate(fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 4096, 8192);
if(ret) { zRc = errno; }
ret = fclose(h);
@@ -122,7 +133,7 @@ void LinuxSparse(const char* path)
}
fd = fileno(h);
ret = fallocate(fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 32768, 81920);
ret = linux_fallocate(fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 32768, 81920);
if(ret) { zRc = errno; }
ret = fclose(h);