1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)pw_scan.c 8.1 (Berkeley) 06/06/93"; 10 #endif /* not lint */ 11 12 /* 13 * This module is used to "verify" password entries by chpass(1) and 14 * pwd_mkdb(8). 15 */ 16 17 #include <sys/param.h> 18 #include <fcntl.h> 19 #include <pwd.h> 20 #include <errno.h> 21 #include <stdio.h> 22 #include <string.h> 23 #include <stdlib.h> 24 25 extern char *progname; 26 27 pw_scan(bp, pw) 28 char *bp; 29 struct passwd *pw; 30 { 31 register long id; 32 register int root; 33 register char *p, *sh; 34 char *getusershell(); 35 36 if (!(pw->pw_name = strsep(&bp, ":"))) /* login */ 37 goto fmt; 38 root = !strcmp(pw->pw_name, "root"); 39 40 if (!(pw->pw_passwd = strsep(&bp, ":"))) /* passwd */ 41 goto fmt; 42 43 if (!(p = strsep(&bp, ":"))) /* uid */ 44 goto fmt; 45 id = atol(p); 46 if (root && id) { 47 (void)fprintf(stderr, "%s: root uid should be 0", progname); 48 return(0); 49 } 50 if (id > USHRT_MAX) { 51 (void)fprintf(stderr, 52 "%s: %s > max uid value (%d)", progname, p, USHRT_MAX); 53 return(0); 54 } 55 pw->pw_uid = id; 56 57 if (!(p = strsep(&bp, ":"))) /* gid */ 58 goto fmt; 59 id = atol(p); 60 if (id > USHRT_MAX) { 61 (void)fprintf(stderr, 62 "%s: %s > max gid value (%d)", progname, p, USHRT_MAX); 63 return(0); 64 } 65 pw->pw_gid = id; 66 67 pw->pw_class = strsep(&bp, ":"); /* class */ 68 if (!(p = strsep(&bp, ":"))) /* change */ 69 goto fmt; 70 pw->pw_change = atol(p); 71 if (!(p = strsep(&bp, ":"))) /* expire */ 72 goto fmt; 73 pw->pw_expire = atol(p); 74 pw->pw_gecos = strsep(&bp, ":"); /* gecos */ 75 pw->pw_dir = strsep(&bp, ":"); /* directory */ 76 if (!(pw->pw_shell = strsep(&bp, ":"))) /* shell */ 77 goto fmt; 78 79 p = pw->pw_shell; 80 if (root && *p) /* empty == /bin/sh */ 81 for (setusershell();;) { 82 if (!(sh = getusershell())) { 83 (void)fprintf(stderr, 84 "%s: warning, unknown root shell\n", 85 progname); 86 break; 87 } 88 if (!strcmp(p, sh)) 89 break; 90 } 91 92 if (p = strsep(&bp, ":")) { /* too many */ 93 fmt: (void)fprintf(stderr, "%s: corrupted entry\n", progname); 94 return(0); 95 } 96 return(1); 97 } 98