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#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
static inline char *xreadlink(const char *restrict path) {
char *buffer;
size_t allocated = 128;
ssize_t len;
while (1) {
buffer = (char *)malloc(allocated);
if (!buffer) {
return NULL;
}
len = readlink(path, buffer, allocated);
if (len < (ssize_t)allocated) {
return buffer;
}
free(buffer);
if (len >= (ssize_t)allocated) {
allocated *= 2;
continue;
}
return NULL;
}
}
static inline char *xgethostname() {
long max_host_name;
char *buffer;
max_host_name = sysconf(_SC_HOST_NAME_MAX);
buffer = malloc(max_host_name + 1);
if (gethostname(buffer, max_host_name + 1)) {
free(buffer);
return NULL;
}
buffer[max_host_name] = '\0';
return buffer;
}
static inline char *xgetcwd() {
char *buffer;
size_t allocated = 128;
while (1) {
buffer = (char *)malloc(allocated);
if (!buffer) {
return NULL;
}
getcwd(buffer, allocated);
if (buffer)
return buffer;
free(buffer);
if (errno == ERANGE) {
allocated *= 2;
continue;
}
return NULL;
}
}
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