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Annotation of coherent/d/lib/libc/gen/getpwent.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Coherent I/O Library.
        !             3:  * Routines to get the password file entry.
        !             4:  * (searches by next entry, name or numerical id).
        !             5:  */
        !             6: 
        !             7: #include <stdio.h>
        !             8: #include <pwd.h>
        !             9: 
        !            10: #define field(x)       { x=cp; while (*cp++); }
        !            11: #define        NPWLINE 120
        !            12: #define        PWFILE  "/etc/passwd"
        !            13: 
        !            14: static char    pwline[NPWLINE];
        !            15: static struct  passwd pw;
        !            16: static FILE    *pwfile = { NULL };
        !            17: 
        !            18: struct passwd *
        !            19: getpwnam(name)
        !            20: char *name;
        !            21: {
        !            22:        register struct passwd *pwp;
        !            23: 
        !            24:        setpwent();
        !            25:        while ((pwp = getpwent()) != NULL)
        !            26:                if (streq(name, pwp->pw_name))
        !            27:                        return (pwp);
        !            28:        return (NULL);
        !            29: }
        !            30: 
        !            31: struct passwd *
        !            32: getpwuid(uid)
        !            33: {
        !            34:        register struct passwd *pwp;
        !            35: 
        !            36:        setpwent();
        !            37:        while ((pwp = getpwent()) != NULL)
        !            38:                if (uid == pwp->pw_uid)
        !            39:                        return (pwp);
        !            40:        return (NULL);
        !            41: }
        !            42: 
        !            43: struct passwd *
        !            44: getpwent()
        !            45: {
        !            46:        register char *cp, *xp;
        !            47:        register c;
        !            48: 
        !            49:        if (pwfile == NULL)
        !            50:                if ((pwfile = fopen(PWFILE, "r")) == NULL)
        !            51:                        return (NULL);
        !            52:        cp = pwline;
        !            53:        while ((c = getc(pwfile))!=EOF && c!='\n') {
        !            54:                if (c == ':')
        !            55:                        c = '\0';
        !            56:                if (cp < &pwline[NPWLINE-1])
        !            57:                        *cp++ = c;
        !            58:        }
        !            59:        if (c == EOF)
        !            60:                return (NULL);
        !            61:        *cp = '\0';
        !            62:        cp = pwline;
        !            63:        field(pw.pw_name);
        !            64:        field(pw.pw_passwd);
        !            65:        field(xp);
        !            66:        pw.pw_uid = atoi(xp);
        !            67:        field(xp);
        !            68:        pw.pw_gid = atoi(xp);
        !            69:        field(pw.pw_gecos);
        !            70:        field(pw.pw_dir);
        !            71:        field(pw.pw_shell);
        !            72:        return (&pw);
        !            73: }
        !            74: 
        !            75: setpwent()
        !            76: {
        !            77:        if (pwfile != NULL)
        !            78:                rewind(pwfile);
        !            79: }
        !            80: 
        !            81: endpwent()
        !            82: {
        !            83:        if (pwfile != NULL) {
        !            84:                fclose(pwfile);
        !            85:                pwfile = NULL;
        !            86:        }
        !            87: }

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