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make tmpfile fail after exceeding max tries.

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This commit is contained in:
Rich Felker 2011-03-29 08:37:57 -04:00
parent 507a9fa6ff
commit a88edbec15
1 changed files with 6 additions and 2 deletions
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8
src/stdio/tmpfile.c
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@ -3,14 +3,17 @@
#include <unistd.h> #include <unistd.h>
#include "stdio_impl.h" #include "stdio_impl.h"
#define MAXTRIES 100
FILE *tmpfile(void) FILE *tmpfile(void)
{ {
char buf[L_tmpnam], *s; char buf[L_tmpnam], *s;
int fd; int fd;
FILE *f; FILE *f;
for (;;) { int try;
for (try=0; try<MAXTRIES; try++) {
s = tmpnam(buf); s = tmpnam(buf);
if (!s) return NULL; if (!s) return 0;
fd = syscall(SYS_open, s, O_RDWR|O_CREAT|O_EXCL|O_LARGEFILE, 0600); fd = syscall(SYS_open, s, O_RDWR|O_CREAT|O_EXCL|O_LARGEFILE, 0600);
if (fd >= 0) { if (fd >= 0) {
f = __fdopen(fd, "w+"); f = __fdopen(fd, "w+");
@ -18,6 +21,7 @@ FILE *tmpfile(void)
return f; return f;
} }
} }
return 0;
} }
LFS64(tmpfile); LFS64(tmpfile);