diff options
Diffstat (limited to 'mdk-stage1/dietlibc/libcruft/mkstemp.c')
| -rw-r--r-- | mdk-stage1/dietlibc/libcruft/mkstemp.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/mdk-stage1/dietlibc/libcruft/mkstemp.c b/mdk-stage1/dietlibc/libcruft/mkstemp.c index 3b24ecb54..7dc19d4ed 100644 --- a/mdk-stage1/dietlibc/libcruft/mkstemp.c +++ b/mdk-stage1/dietlibc/libcruft/mkstemp.c @@ -1,14 +1,21 @@ #include <unistd.h> #include <fcntl.h> #include <string.h> +#include <stdlib.h> #include <errno.h> +#include "dietfeatures.h" + +#ifndef O_NOFOLLOW +#define O_NOFOLLOW 0 +#endif int mkstemp(char* template) { char *tmp=template+strlen(template)-6; int randfd; int i,res; unsigned int random; - for (i=0; i<6; ++i) if (tmp[i]!='X') { __set_errno(EINVAL); return -1; } + if (tmp<template) goto error; + for (i=0; i<6; ++i) if (tmp[i]!='X') { error: errno=EINVAL; return -1; } randfd=open("/dev/urandom",O_RDONLY); for (;;) { read(randfd,&random,sizeof(random)); @@ -16,8 +23,9 @@ int mkstemp(char* template) { int hexdigit=(random>>(i*5))&0x1f; tmp[i]=hexdigit>9?hexdigit+'a'-10:hexdigit+'0'; } - res=open(template,O_CREAT|O_RDWR|O_EXCL,0600); - if (res>=0) return res; + res=open(template,O_CREAT|O_RDWR|O_EXCL|O_NOFOLLOW,0600); + if (res>=0 || errno!=EEXIST) break; } close(randfd); + return res; } |