From e3d97c779d907e3556a40a69b84f001d95cf4d6a Mon Sep 17 00:00:00 2001 From: David Nugent Date: Tue, 23 Feb 1999 07:15:11 +0000 Subject: 1) Do not blindly ignore file update errors which may occur due to concurrent updating 2) Add -V , which allows maintaining user/group database in alternate locations other than /etc. --- pw/pw_vpw.c | 316 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 316 insertions(+) create mode 100644 pw/pw_vpw.c (limited to 'pw/pw_vpw.c') diff --git a/pw/pw_vpw.c b/pw/pw_vpw.c new file mode 100644 index 0000000..fca5324 --- /dev/null +++ b/pw/pw_vpw.c @@ -0,0 +1,316 @@ +/*- + * Copyright (C) 1996 + * David L. Nugent. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + */ + +#ifndef lint +static const char rcsid[] = + "$Id$"; +#endif /* not lint */ + +#include +#include +#include +#include + +#include "pwupd.h" + +static FILE * pwd_fp = NULL; + +void +vendpwent(void) +{ + if (pwd_fp != NULL) { + fclose(pwd_fp); + pwd_fp = NULL; + } +} + +void +vsetpwent(void) +{ + vendpwent(); +} + +static struct passwd * +vnextpwent(char const * nam, uid_t uid, int doclose) +{ + struct passwd * pw = NULL; + static char pwtmp[1024]; + + strncpy(pwtmp, getpwpath(_MASTERPASSWD), sizeof pwtmp); + pwtmp[sizeof pwtmp - 1] = '\0'; + + if (pwd_fp != NULL || (pwd_fp = fopen(pwtmp, "r")) != NULL) { + int done = 0; + + static struct passwd pwd; + + while (!done && fgets(pwtmp, sizeof pwtmp, pwd_fp) != NULL) + { + int i, quickout = 0; + char * q; + char * p = strchr(pwtmp, '\n'); + + if (p == NULL) { + while (fgets(pwtmp, sizeof pwtmp, pwd_fp) != NULL && strchr(pwtmp, '\n')==NULL) + ; /* Skip long lines */ + continue; + } + + /* skip comments & empty lines */ + if (*pwtmp =='\n' || *pwtmp == '#') + continue; + + i = 0; + q = p = pwtmp; + bzero(&pwd, sizeof pwd); + while (!quickout && (p = strsep(&q, ":\n")) != NULL) { + switch (i++) + { + case 0: /* username */ + pwd.pw_name = p; + if (nam) { + if (strcmp(nam, p) == 0) + done = 1; + else + quickout = 1; + } + break; + case 1: /* password */ + pwd.pw_passwd = p; + break; + case 2: /* uid */ + pwd.pw_uid = atoi(p); + if (uid != (uid_t)-1) { + if (uid == pwd.pw_uid) + done = 1; + else + quickout = 1; + } + break; + case 3: /* gid */ + pwd.pw_gid = atoi(p); + break; + case 4: /* class */ + if (nam == NULL && uid == (uid_t)-1) + done = 1; + pwd.pw_class = p; + break; + case 5: /* change */ + pwd.pw_change = (time_t)atol(p); + break; + case 6: /* expire */ + pwd.pw_expire = (time_t)atol(p); + break; + case 7: /* gecos */ + pwd.pw_gecos = p; + break; + case 8: /* directory */ + pwd.pw_dir = p; + break; + case 9: /* shell */ + pwd.pw_shell = p; + break; + } + } + } + if (doclose) + vendpwent(); + if (done && pwd.pw_name) { + pw = &pwd; + + #define CKNULL(s) s = s ? s : "" + CKNULL(pwd.pw_passwd); + CKNULL(pwd.pw_class); + CKNULL(pwd.pw_gecos); + CKNULL(pwd.pw_dir); + CKNULL(pwd.pw_shell); + } + } + return pw; +} + +struct passwd * +vgetpwent(void) +{ + return vnextpwent(NULL, -1, 0); +} + +struct passwd * +vgetpwuid(uid_t uid) +{ + return vnextpwent(NULL, uid, 1); +} + +struct passwd * +vgetpwnam(const char * nam) +{ + return vnextpwent(nam, -1, 1); +} + +int vpwdb(char *arg, ...) +{ + arg=arg; + return 0; +} + + + +static FILE * grp_fp = NULL; + +void +vendgrent(void) +{ + if (grp_fp != NULL) { + fclose(grp_fp); + grp_fp = NULL; + } +} + +int +vsetgrent(void) +{ + vendgrent(); + return 0; +} + +static struct group * +vnextgrent(char const * nam, gid_t gid, int doclose) +{ + struct group * gr = NULL; + + static char * grtmp = NULL; + static int grlen = 0; + static char ** mems = NULL; + static int memlen = 0; + + extendline(&grtmp, &grlen, MAXPATHLEN); + strncpy(grtmp, getgrpath(_GROUP), MAXPATHLEN); + grtmp[MAXPATHLEN - 1] = '\0'; + + if (grp_fp != NULL || (grp_fp = fopen(grtmp, "r")) != NULL) { + int done = 0; + + static struct group grp; + + while (!done && fgets(grtmp, grlen, grp_fp) != NULL) + { + int i, quickout = 0; + int mno = 0; + char * q, * p; + char * sep = ":\n"; + + if ((p = strchr(grtmp, '\n')) == NULL) { + int l; + extendline(&grtmp, &grlen, grlen + PWBUFSZ); + l = strlen(grtmp); + if (fgets(grtmp + l, grlen - l, grp_fp) == NULL) + break; /* No newline terminator on last line */ + } + /* Skip comments and empty lines */ + if (*grtmp == '\n' || *grtmp == '#') + continue; + i = 0; + q = p = grtmp; + bzero(&grp, sizeof grp); + extendarray(&mems, &memlen, 200); + while (!quickout && (p = strsep(&q, sep)) != NULL) { + switch (i++) + { + case 0: /* groupname */ + grp.gr_name = p; + if (nam) { + if (strcmp(nam, p) == 0) + done = 1; + else + quickout = 1; + } + break; + case 1: /* password */ + grp.gr_passwd = p; + break; + case 2: /* gid */ + grp.gr_gid = atoi(p); + if (gid != (gid_t)-1) { + if (gid == (gid_t)grp.gr_gid) + done = 1; + else + quickout = 1; + } else if (nam == NULL) + done = 1; + break; + case 3: + q = p; + sep = ",\n"; + break; + default: + if (*p) { + extendarray(&mems, &memlen, mno + 2); + mems[mno++] = p; + } + break; + } + } + grp.gr_mem = mems; + mems[mno] = NULL; + } + if (doclose) + vendgrent(); + if (done && grp.gr_name) { + gr = &grp; + + CKNULL(grp.gr_passwd); + } + } + return gr; +} + +struct group * +vgetgrent(void) +{ + return vnextgrent(NULL, -1, 0); +} + + +struct group * +vgetgrgid(gid_t gid) +{ + return vnextgrent(NULL, gid, 1); +} + +struct group * +vgetgrnam(const char * nam) +{ + return vnextgrent(nam, -1, 1); +} + +int +vgrdb(char *arg, ...) +{ + arg=arg; + return 0; +} + -- cgit v1.2.3-56-ge451