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misc: Refactor ssh_strerror to check return values

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Signed-off-by: Jakub Jelen <jjelen@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
This commit is contained in:
Jakub Jelen
2022-08-29 14:03:49 +02:00
committed by Andreas Schneider
parent 8cf9c8162f
commit 41f2ee92c6
2 changed files with 44 additions and 7 deletions
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22
src/misc.c
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@@ -1953,17 +1953,25 @@ char *ssh_strreplace(const char *src, const char *pattern, const char *replace)
*/
char *ssh_strerror(int err_num, char *buf, size_t buflen)
{
#if defined(_WIN32)
strerror_s(buf, buflen, err_num);
return buf;
#elif defined(__linux__) && defined(__GLIBC__) && defined(_GNU_SOURCE)
#if defined(__linux__) && defined(__GLIBC__) && defined(_GNU_SOURCE)
/* GNU extension on Linux */
return strerror_r(err_num, buf, buflen);
#else
/* POSIX version available for example on FreeBSD */
strerror_r(err_num, buf, buflen);
return buf;
int rv;
#if defined(_WIN32)
rv = strerror_s(buf, buflen, err_num);
#else
/* POSIX version available for example on FreeBSD or in musl libc */
rv = strerror_r(err_num, buf, buflen);
#endif /* _WIN32 */
/* make sure the buffer is initialized and terminated with NULL */
if (-rv == ERANGE) {
buf[0] = '\0';
}
return buf;
#endif /* defined(__linux__) && defined(__GLIBC__) && defined(_GNU_SOURCE) */
}
/** @} */