ref: 614b18484cb754c4ba936d143016b558845073b1
dir: /sys/src/cmd/postscript/common/tempnam.c/
#if defined(V9) || defined(BSD4_2) || defined(plan9) #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <errno.h> #include <sys/types.h> #include <sys/stat.h> char * tempnam(char *dir, char *pfx) { int pid; char *tnm; struct stat stb; static int seq = 0; if (dir == NULL) dir = "."; #ifdef plan9 /* our access emulation has a race when checking for write access */ if (access(dir, R_OK|X_OK) == -1) #else if (access(dir, R_OK|W_OK|X_OK) == -1) #endif return NULL; pid = getpid(); tnm = malloc(strlen(dir) + 1 + strlen(pfx) + 2*20 + 1); if (tnm == NULL) return NULL; do { sprintf(tnm, "%s/%s.%d.%d", dir, pfx, pid, seq++); errno = 0; } while (stat(tnm, &stb) >= 0 && seq < 256); return tnm; } #endif