diff options
Diffstat (limited to 'libc/inet/rpc/getrpcent.c')
| -rw-r--r-- | libc/inet/rpc/getrpcent.c | 191 |
1 files changed, 139 insertions, 52 deletions
diff --git a/libc/inet/rpc/getrpcent.c b/libc/inet/rpc/getrpcent.c index e290449c0..b796d856d 100644 --- a/libc/inet/rpc/getrpcent.c +++ b/libc/inet/rpc/getrpcent.c @@ -42,6 +42,7 @@ #include <netdb.h> #include <sys/socket.h> #include <arpa/inet.h> +#include <errno.h> /* * Internet version. @@ -58,46 +59,37 @@ static struct rpcdata { char *domain; } *rpcdata; -static struct rpcent *interpret(const char *val, int len); - static char RPCDB[] = "/etc/rpc"; static struct rpcdata *_rpcdata(void) { register struct rpcdata *d = rpcdata; - if (d == 0) { + if (d == NULL) { d = (struct rpcdata *) calloc(1, sizeof(struct rpcdata)); rpcdata = d; } - return (d); + return d; } -struct rpcent *getrpcbynumber(number) -register int number; +struct rpcent *getrpcbynumber(register int number) { register struct rpcdata *d = _rpcdata(); - register struct rpcent *p; + register struct rpcent *rpc; - if (d == 0) - return (0); + if (d == NULL) + return NULL; setrpcent(0); - while ((p = getrpcent())) { - if (p->r_number == number) + while ((rpc = getrpcent())) { + if (rpc->r_number == number) break; } endrpcent(); - return (p); + return rpc; } -struct rpcent * -#ifdef __linux__ -getrpcbyname(const char *name) -#else -getrpcbyname(name) -char *name; -#endif +struct rpcent *getrpcbyname(const char *name) { struct rpcent *rpc; char **rp; @@ -105,25 +97,21 @@ char *name; setrpcent(0); while ((rpc = getrpcent())) { if (strcmp(rpc->r_name, name) == 0) - return (rpc); + return rpc; for (rp = rpc->r_aliases; *rp != NULL; rp++) { if (strcmp(*rp, name) == 0) - return (rpc); + return rpc; } } endrpcent(); - return (NULL); + return NULL; } -#ifdef __linux__ -void -#endif -setrpcent(f) -int f; +void setrpcent(int f) { register struct rpcdata *d = _rpcdata(); - if (d == 0) + if (d == NULL) return; if (d->rpcf == NULL) d->rpcf = fopen(RPCDB, "r"); @@ -135,36 +123,42 @@ int f; d->stayopen |= f; } -#ifdef __linux__ -void -#endif -endrpcent() +void endrpcent() { register struct rpcdata *d = _rpcdata(); - if (d == 0) + if (d == NULL) return; - if (d->current && !d->stayopen) { + if (d->stayopen) + return; + if (d->current) { free(d->current); d->current = NULL; } - if (d->rpcf && !d->stayopen) { + if (d->rpcf) { fclose(d->rpcf); d->rpcf = NULL; } } +static struct rpcent *interpret(struct rpcdata *); + +static struct rpcent *__get_next_rpcent(struct rpcdata *d) +{ + if (fgets(d->line, BUFSIZ, d->rpcf) == NULL) + return NULL; + return interpret(d); +} + struct rpcent *getrpcent() { register struct rpcdata *d = _rpcdata(); - if (d == 0) - return (NULL); + if (d == NULL) + return NULL; if (d->rpcf == NULL && (d->rpcf = fopen(RPCDB, "r")) == NULL) - return (NULL); - if (fgets(d->line, BUFSIZ, d->rpcf) == NULL) - return (NULL); - return interpret(d->line, strlen(d->line)); + return NULL; + return __get_next_rpcent(d); } #ifdef __linux__ @@ -184,37 +178,33 @@ static char *firstwhite(char *s) } #endif -static struct rpcent *interpret(const char *val, int len) +static struct rpcent *interpret(register struct rpcdata *d) { - register struct rpcdata *d = _rpcdata(); char *p; register char *cp, **q; - if (d == 0) - return NULL; - strncpy(d->line, val, len); p = d->line; - d->line[len] = '\n'; + d->line[strlen(p)-1] = '\n'; if (*p == '#') - return (getrpcent()); + return __get_next_rpcent(d); cp = index(p, '#'); if (cp == NULL) { cp = index(p, '\n'); if (cp == NULL) - return (getrpcent()); + return __get_next_rpcent(d); } *cp = '\0'; #ifdef __linux__ if ((cp = firstwhite(p))) *cp++ = 0; else - return (getrpcent()); + return __get_next_rpcent(d); #else cp = index(p, ' '); if (cp == NULL) { cp = index(p, '\t'); if (cp == NULL) - return (getrpcent()); + return __get_next_rpcent(d); } *cp++ = '\0'; #endif @@ -259,5 +249,102 @@ static struct rpcent *interpret(const char *val, int len) #endif } *q = NULL; - return (&d->rpc); + return &d->rpc; +} + +#if defined(__UCLIBC_HAS_REENTRANT_RPC__) + +#if defined(__UCLIBC_HAS_THREADS__) +# include <pthread.h> +static pthread_mutex_t rpcdata_lock = PTHREAD_MUTEX_INITIALIZER; +# define LOCK __pthread_mutex_lock(&rpcdata_lock) +# define UNLOCK __pthread_mutex_unlock(&rpcdata_lock); +#else +# define LOCK +# define UNLOCK +#endif + +static int __copy_rpcent(struct rpcent *r, struct rpcent *result_buf, char *buffer, + size_t buflen, struct rpcent **result) +{ + size_t i, s; + + *result = NULL; + + if (!r) + return ENOENT; + + /* copy the struct from the shared mem */ + memset(result_buf, 0x00, sizeof(*result_buf)); + memset(buffer, 0x00, buflen); + + result_buf->r_number = r->r_number; + + /* copy the aliases ... need to not only copy the alias strings, + * but the array of pointers to the alias strings */ + i = 0; + while (r->r_aliases[i++]) ; + + s = i-- * sizeof(char*); + if (buflen < s) + goto err_out; + result_buf->r_aliases = (char**)buffer; + buffer += s; + buflen -= s; + + while (i-- > 0) { + s = strlen(r->r_aliases[i]) + 1; + if (buflen < s) + goto err_out; + result_buf->r_aliases[i] = buffer; + buffer += s; + buflen -= s; + memcpy(result_buf->r_aliases[i], r->r_aliases[i], s); + } + + /* copy the name */ + i = strlen(r->r_name); + if (buflen <= i) + goto err_out; + result_buf->r_name = buffer; + memcpy(result_buf->r_name, r->r_name, i); + + /* that was a hoot eh ? */ + *result = result_buf; + + return 0; +err_out: + return ERANGE; +} + +int getrpcbynumber_r(int number, struct rpcent *result_buf, char *buffer, + size_t buflen, struct rpcent **result) +{ + int ret; + LOCK; + ret = __copy_rpcent(getrpcbynumber(number), result_buf, buffer, buflen, result); + UNLOCK; + return ret; +} + +int getrpcbyname_r(const char *name, struct rpcent *result_buf, char *buffer, + size_t buflen, struct rpcent **result) +{ + int ret; + LOCK; + ret = __copy_rpcent(getrpcbyname(name), result_buf, buffer, buflen, result); + UNLOCK; + return ret; +} + +int getrpcent_r(struct rpcent *result_buf, char *buffer, + size_t buflen, struct rpcent **result) +{ + int ret; + LOCK; + ret = __copy_rpcent(getrpcent(), result_buf, buffer, buflen, result); + UNLOCK; + return ret; } + +#endif /* __UCLIBC_HAS_REENTRANT_RPC__ */ |