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#include "config.h"
#include "fetchmail.h"
#include "i18n.h"
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
/* similar to realpath(file_name, NULL) - on systems that do not natively
* support the resolved file name to be passed as NULL, malloc() the buffer of
* PATH_MAX + 1 bytes, or abort if the system does not define PATH_MAX
*/
char *fm_realpath(const char *restrict file_name)
{
char *rv;
if (NULL == file_name) {
errno = EINVAL;
return NULL;
}
rv = realpath(file_name, NULL);
/* FreeBSD, recent GNU libc, and all SUSv4
* compliant systems auto-allocate => done */
if (NULL == rv && errno == EINVAL) {
/* Implementation does not auto-allocate, but
* PATH_MAX is provided (Solaris 10, f.i.) */
#if HAVE_DECL_PATH_MAX
char *b = (char *)xmalloc(PATH_MAX + 1);
rv = realpath(file_name, b);
#else
/* unsupported */
report(stderr, GT_("Your operating system neither defines PATH_MAX nor will it accept realpath(f, NULL). Aborting.\n"));
abort();
#endif
}
return rv;
}
#ifdef TEST
#include <string.h>
const char *program_name= __FILE__;
int main(int argc, char **argv)
{
int i;
int e = EXIT_SUCCESS;
for (i = 1; i < argc; ++i) {
char *p = fm_realpath(argv[i]);
if (p) {
printf("%s -> %s\n", argv[i], p);
free(p);
} else {
fprintf(stderr, "%s: error: %s\n", argv[i], strerror(errno));
e = EXIT_FAILURE;
}
}
exit(e);
}
#endif
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