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Simplify memory_file_open
This commit is contained in:
Stelios Fragkakis 2025-04-01 12:58:50 +03:00 • committed by GitHub
parent 45461ec05c
commit 543aa59782
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GPG key ID: B5690EEEBB952194
1 changed files with 16 additions and 15 deletions

31
src/libnetdata/memory/nd-mmap.c
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@ -20,23 +20,24 @@ int enable_ksm = 0;
#endif
static int memory_file_open(const char *filename, size_t size) {
// netdata_log_info("memory_file_open('%s', %zu", filename, size);
int fd = open(filename, O_RDWR | O_CREAT | O_NOATIME | O_CLOEXEC, 0664);
if (fd != -1) {
if (lseek(fd, size, SEEK_SET) == (off_t) size) {
if (write(fd, "", 1) == 1) {
if (ftruncate(fd, size))
netdata_log_error("Cannot truncate file '%s' to size %zu. Will use the larger file.", filename, size);
}
else
netdata_log_error("Cannot write to file '%s' at position %zu.", filename, size);
}
else
netdata_log_error("Cannot seek file '%s' to size %zu.", filename, size);
}
else
if (fd == -1) {
netdata_log_error("Cannot create/open file '%s'.", filename);
return -1;
}
if (ftruncate(fd, size) != 0) {
netdata_log_error("Cannot truncate file '%s' to size %zu.", filename, size);
close(fd);
return -1;
}
struct stat st;
if (fstat(fd, &st) != 0 || (size_t)st.st_size < size) {
netdata_log_error("File '%s' is only %lld bytes, expected %zu!", filename, (long long)st.st_size, size);
close(fd);
return -1;
}
return fd;
}