mirror of
https://git.musl-libc.org/git/musl
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8d2f8064aa
1. wrong return value and missing errno for negative suffix len 2. failure to catch suffix len > strlen 3. remove unwanted clearing of input string in invalid case
30 lines
618 B
C
30 lines
618 B
C
#define _BSD_SOURCE
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include "libc.h"
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char *__randname(char *);
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int __mkostemps(char *template, int len, int flags)
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{
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size_t l = strlen(template);
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if (l<6 || len>l-6 || strncmp(template+l-len-6, "XXXXXX", 6)) {
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errno = EINVAL;
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return -1;
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}
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int fd, retries = 100;
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while (retries--) {
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__randname(template+l-len-6);
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if ((fd = open(template, flags | O_RDWR | O_CREAT | O_EXCL, 0600))>=0)
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return fd;
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if (errno != EEXIST) return -1;
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}
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return -1;
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}
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weak_alias(__mkostemps, mkostemps);
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weak_alias(__mkostemps, mkostemps64);
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