diff options
| -rw-r--r-- | ChangeLog | 3 | ||||
| -rw-r--r-- | nss/Makefile | 2 | ||||
| -rw-r--r-- | nss/bug-erange.c | 44 |
3 files changed, 48 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog index b3f743635c..688e0d52bf 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,8 @@ 2002-09-11 Roland McGrath <roland@redhat.com> + * nss/bug-erange.c: New file. + * nss/Makefile (tests): Add it. + * nss/getXXbyYY_r.c (INTERNAL (REENTRANT_NAME)): Return errno instead of always EAGAIN when status is NSS_STATUS_TRYAGAIN. diff --git a/nss/Makefile b/nss/Makefile index b81bdb4433..1a24482196 100644 --- a/nss/Makefile +++ b/nss/Makefile @@ -39,7 +39,7 @@ databases = proto service hosts network grp pwd rpc ethers \ others := getent install-bin := getent -tests = test-netdb +tests = test-netdb bug-erange include ../Makeconfig diff --git a/nss/bug-erange.c b/nss/bug-erange.c new file mode 100644 index 0000000000..5e535a0fe4 --- /dev/null +++ b/nss/bug-erange.c @@ -0,0 +1,44 @@ +/* Test case for gethostbyname_r bug when buffer expansion required. */ + +#include <netdb.h> +#include <arpa/inet.h> +#include <errno.h> +#include <string.h> +#include <stdio.h> +#include <stdlib.h> + +int +main (void) +{ + const char *host = "www.gnu.org"; + + /* This code approximates the example code in the library manual. */ + + struct hostent hostbuf, *hp; + size_t hstbuflen; + char *tmphstbuf; + int res; + int herr; + + hstbuflen = 16; /* Make it way small to ensure ERANGE. */ + /* Allocate buffer, remember to free it to avoid memory leakage. */ + tmphstbuf = malloc (hstbuflen); + + while ((res = gethostbyname_r (host, &hostbuf, tmphstbuf, hstbuflen, + &hp, &herr)) == ERANGE) + { + /* Enlarge the buffer. */ + hstbuflen *= 2; + tmphstbuf = realloc (tmphstbuf, hstbuflen); + } + + if (res != 0 || hp == NULL) + { + printf ("gethostbyname_r failed: %s (errno: %m)\n", strerror (res)); + return 1; + } + + printf ("Got: %s %s\n", hp->h_name, + inet_ntoa (*(struct in_addr *) hp->h_addr)); + return 0; +} |