diff options
Diffstat (limited to 'usr/src/lib/nsswitch/files/common/bootparams_getbyname.c')
| -rw-r--r-- | usr/src/lib/nsswitch/files/common/bootparams_getbyname.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/usr/src/lib/nsswitch/files/common/bootparams_getbyname.c b/usr/src/lib/nsswitch/files/common/bootparams_getbyname.c new file mode 100644 index 0000000000..ef51910acb --- /dev/null +++ b/usr/src/lib/nsswitch/files/common/bootparams_getbyname.c @@ -0,0 +1,166 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (the "License"). You may not use this file except in compliance + * with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * files/bootparams_getbyname.c -- "files" backend for + * nsswitch "bootparams" database. + * + * Copyright (c) 1988-1995 Sun Microsystems Inc + * All Rights Reserved. + */ + +#pragma ident "%Z%%M% %I% %E% SMI" + +static const char *bootparams = "/etc/bootparams"; + +#include "files_common.h" +#include <stdlib.h> +#include <ctype.h> +#include <strings.h> + +static nss_status_t _nss_files_XY_bootparams(files_backend_ptr_t, + nss_XbyY_args_t *, const char *); + +static nss_status_t +getbyname(be, a) + files_backend_ptr_t be; + void *a; +{ + nss_XbyY_args_t *argp = (nss_XbyY_args_t *) a; + nss_status_t res; + + /* bootparams_getbyname() has not set/endent; rewind on each call */ + if ((res = _nss_files_setent(be, 0)) != NSS_SUCCESS) { + return (res); + } + return (_nss_files_XY_bootparams(be, argp, argp->key.name)); +} + +static files_backend_op_t bootparams_ops[] = { + _nss_files_destr, + getbyname +}; + +/*ARGSUSED*/ +nss_backend_t * +_nss_files_bootparams_constr(dummy1, dummy2, dummy3) + const char *dummy1, *dummy2, *dummy3; +{ + return (_nss_files_constr(bootparams_ops, + sizeof (bootparams_ops) / sizeof (bootparams_ops[0]), + bootparams, + NSS_LINELEN_BOOTPARAMS, + NULL)); +} + +/* + * bootparams has the hostname as part of the data in the file, but the other + * backends don't include it in the data passed to the backend. For this + * reason, we process everything here and don't bother calling the backend. + */ +/*ARGSUSED*/ +static nss_status_t +_nss_files_XY_bootparams(be, args, filter) + files_backend_ptr_t be; + nss_XbyY_args_t *args; + const char *filter; + /* + * filter not useful here since the key + * we are looking for is the first "word" + * on the line and we can be fast enough. + */ +{ + nss_status_t res; + + if (be->buf == 0 && + (be->buf = (char *)malloc(be->minbuf)) == 0) { + (void) _nss_files_endent(be, 0); + return (NSS_UNAVAIL); /* really panic, malloc failed */ + } + + res = NSS_NOTFOUND; + + /*CONSTCOND*/ + while (1) { + char *instr = be->buf; + char *p, *host, *limit; + int linelen; + + /* + * _nss_files_read_line does process the '\' that are used + * in /etc/bootparams for continuation and gives one long + * buffer. + * + * linelen counts the characters up to but excluding the '\n' + */ + if ((linelen = _nss_files_read_line(be->f, instr, + be->minbuf)) < 0) { + /* End of file */ + args->returnval = 0; + args->erange = 0; + break; + } + + /* + * we need to strip off the host name before returning it. + */ + p = instr; + limit = p + linelen; + + /* Skip over leading whitespace */ + while (p < limit && isspace(*p)) { + p++; + } + host = p; + + /* Skip over the hostname */ + while (p < limit && !isspace(*p)) { + p++; + } + *p++ = '\0'; + + if (strcasecmp(args->key.name, host) != 0) { + continue; + } + + /* Skip over whitespace between name and first datum */ + while (p < limit && isspace(*p)) { + p++; + } + if (p >= limit) { + /* Syntax error -- no data! Just skip it. */ + continue; + } + + linelen -= (p - instr); + if (args->buf.buflen <= linelen) { /* not enough buffer */ + args->erange = 1; + break; + } + (void) memcpy(args->buf.buffer, p, linelen); + args->buf.buffer[linelen] = '\0'; + args->returnval = args->buf.result; + res = NSS_SUCCESS; + break; + } + (void) _nss_files_endent(be, 0); + return (res); +} |