1570af302Sopenharmony_ci#include <stdio.h> 2570af302Sopenharmony_ci#include <fcntl.h> 3570af302Sopenharmony_ci#include <errno.h> 4570af302Sopenharmony_ci#include <sys/stat.h> 5570af302Sopenharmony_ci#include <limits.h> 6570af302Sopenharmony_ci#include <string.h> 7570af302Sopenharmony_ci#include <stdlib.h> 8570af302Sopenharmony_ci#include "syscall.h" 9570af302Sopenharmony_ci 10570af302Sopenharmony_ci#define MAXTRIES 100 11570af302Sopenharmony_ci 12570af302Sopenharmony_cichar *tempnam(const char *dir, const char *pfx) 13570af302Sopenharmony_ci{ 14570af302Sopenharmony_ci char s[PATH_MAX]; 15570af302Sopenharmony_ci size_t l, dl, pl; 16570af302Sopenharmony_ci int try; 17570af302Sopenharmony_ci int r; 18570af302Sopenharmony_ci 19570af302Sopenharmony_ci if (!dir) dir = P_tmpdir; 20570af302Sopenharmony_ci if (!pfx) pfx = "temp"; 21570af302Sopenharmony_ci 22570af302Sopenharmony_ci dl = strlen(dir); 23570af302Sopenharmony_ci pl = strlen(pfx); 24570af302Sopenharmony_ci l = dl + 1 + pl + 1 + 6; 25570af302Sopenharmony_ci 26570af302Sopenharmony_ci if (l >= PATH_MAX) { 27570af302Sopenharmony_ci errno = ENAMETOOLONG; 28570af302Sopenharmony_ci return 0; 29570af302Sopenharmony_ci } 30570af302Sopenharmony_ci 31570af302Sopenharmony_ci memcpy(s, dir, dl); 32570af302Sopenharmony_ci s[dl] = '/'; 33570af302Sopenharmony_ci memcpy(s+dl+1, pfx, pl); 34570af302Sopenharmony_ci s[dl+1+pl] = '_'; 35570af302Sopenharmony_ci s[l] = 0; 36570af302Sopenharmony_ci 37570af302Sopenharmony_ci for (try=0; try<MAXTRIES; try++) { 38570af302Sopenharmony_ci __randname(s+l-6); 39570af302Sopenharmony_ci#ifdef SYS_readlink 40570af302Sopenharmony_ci r = __syscall(SYS_readlink, s, (char[1]){0}, 1); 41570af302Sopenharmony_ci#else 42570af302Sopenharmony_ci r = __syscall(SYS_readlinkat, AT_FDCWD, s, (char[1]){0}, 1); 43570af302Sopenharmony_ci#endif 44570af302Sopenharmony_ci if (r == -ENOENT) return strdup(s); 45570af302Sopenharmony_ci } 46570af302Sopenharmony_ci return 0; 47570af302Sopenharmony_ci} 48