diff options
Diffstat (limited to 'usr.sbin/pw/pw_vpw.c')
| -rw-r--r-- | usr.sbin/pw/pw_vpw.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/usr.sbin/pw/pw_vpw.c b/usr.sbin/pw/pw_vpw.c new file mode 100644 index 000000000000..4814ec2076d6 --- /dev/null +++ b/usr.sbin/pw/pw_vpw.c @@ -0,0 +1,211 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * 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. + * + */ + +#include <pwd.h> +#include <grp.h> +#include <libutil.h> +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <err.h> +#include <unistd.h> + +#include "pwupd.h" + +static FILE * pwd_fp = NULL; +static int pwd_scanflag; +static const char *pwd_filename; + +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; + char *line; + size_t linecap; + ssize_t linelen; + + pw = NULL; + line = NULL; + linecap = 0; + + if (pwd_fp == NULL) { + if (geteuid() == 0) { + pwd_filename = _MASTERPASSWD; + pwd_scanflag = PWSCAN_MASTER; + } else { + pwd_filename = _PASSWD; + pwd_scanflag = 0; + } + pwd_fp = fopen(getpwpath(pwd_filename), "r"); + } + + if (pwd_fp != NULL) { + while ((linelen = getline(&line, &linecap, pwd_fp)) > 0) { + /* Skip comments and empty lines */ + if (*line == '\n' || *line == '#') + continue; + /* trim latest \n */ + if (line[linelen - 1 ] == '\n') + line[linelen - 1] = '\0'; + pw = pw_scan(line, pwd_scanflag); + if (pw == NULL) + errx(EXIT_FAILURE, "Invalid user entry in '%s':" + " '%s'", getpwpath(pwd_filename), line); + if (uid != (uid_t)-1) { + if (uid == pw->pw_uid) + break; + } else if (nam != NULL) { + if (strcmp(nam, pw->pw_name) == 0) + break; + } else + break; + free(pw); + pw = NULL; + } + if (doclose) + vendpwent(); + } + free(line); + + 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); +} + + +static FILE * grp_fp = NULL; + +void +vendgrent(void) +{ + if (grp_fp != NULL) { + fclose(grp_fp); + grp_fp = NULL; + } +} + +void +vsetgrent(void) +{ + vendgrent(); +} + +static struct group * +vnextgrent(char const *nam, gid_t gid, int doclose) +{ + struct group *gr; + char *line; + size_t linecap; + ssize_t linelen; + + gr = NULL; + line = NULL; + linecap = 0; + + if (grp_fp != NULL || (grp_fp = fopen(getgrpath(_GROUP), "r")) != NULL) { + while ((linelen = getline(&line, &linecap, grp_fp)) > 0) { + /* Skip comments and empty lines */ + if (*line == '\n' || *line == '#') + continue; + /* trim latest \n */ + if (line[linelen - 1 ] == '\n') + line[linelen - 1] = '\0'; + gr = gr_scan(line); + if (gr == NULL) + errx(EXIT_FAILURE, "Invalid group entry in '%s':" + " '%s'", getgrpath(_GROUP), line); + if (gid != (gid_t)-1) { + if (gid == gr->gr_gid) + break; + } else if (nam != NULL) { + if (strcmp(nam, gr->gr_name) == 0) + break; + } else + break; + free(gr); + gr = NULL; + } + if (doclose) + vendgrent(); + } + free(line); + + 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); +} + |