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Viewing changes to src/username.c

  • Committer: Bazaar Package Importer
  • Author(s): Martin Schulze
  • Date: 2003-11-16 09:49:02 UTC
  • Revision ID: james.westby@ubuntu.com-20031116094902-9x37m9fwmgt50q5p
Tags: upstream-1.02
Import upstream version 1.02

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src/username.c
 
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/*****************************************************************************/
 
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/*                                                                           */
 
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/*                                                                           */
 
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/*      Xsok version 1.01 -- module username.c                               */
 
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/*                                                                           */
 
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/*      Tries to compute a nice user- and hostname (e-mail address).         */
 
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/*      Written by Michael Bischoff (mbi@mo.math.nat.tu-bs.de)               */
 
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/*      November-1994                                                        */
 
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/*      changed October 1995                                                 */
 
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/*      see COPYRIGHT.xsok for Copyright details                             */
 
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/*                                                                           */
 
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/*                                                                           */
 
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/*****************************************************************************/
 
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#ifndef _POSIX_SOURCE
 
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#define _POSIX_SOURCE
 
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#endif
 
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#include <unistd.h>
 
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#include <pwd.h>
 
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#include <sys/types.h>
 
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#include <sys/utsname.h>
 
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#include "xsok.h"
 
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#ifdef BSD_NETKIT
 
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#include <netdb.h>
 
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#endif
 
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char username[256];
 
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void buildusername(const char *name) {
 
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    if (name) {
 
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        if (strlen(name) > 255) {
 
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            strncpy(username, name, 255);
 
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            username[256] = '\0';
 
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        } else
 
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            strcpy(username, name);
 
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    } else {
 
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        struct passwd *pp;
 
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        const char *realname, *loginname;
 
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        char fqdn[256];
 
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        struct utsname buf;
 
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#ifdef BSD_NETKIT
 
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        struct hostent *hp;
 
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#endif
 
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        /* getlogin() fails when xsok is called from the fvwm window
 
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           manager menu (why?) and cuserid() has disappeared in POSIX
 
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           1990. We use getuid() now. */
 
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        if ((pp = getpwuid(getuid()))) {
 
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            if (pp->pw_gecos && strchr(pp->pw_gecos, ','))
 
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                *strchr(pp->pw_gecos, ',') = '\0';
 
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            realname = pp->pw_gecos;
 
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            loginname = pp->pw_name;
 
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        } else {
 
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            /* unable to obtain passwd entry */
 
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            realname = NULL;
 
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            loginname = "unknown";
 
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        }
 
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        if (uname(&buf))
 
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            strcpy(buf.nodename, "unknown");
 
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#ifdef BSD_NETKIT
 
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        if ((hp = gethostbyname(buf.nodename)))
 
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            strcpy(fqdn, hp->h_name);
 
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        else
 
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#endif
 
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            sprintf(fqdn, "%s.(unknown)", buf.nodename);
 
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        if (realname)
 
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            sprintf(username, "%s (%s@%s)", realname, loginname, fqdn);
 
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        else
 
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            sprintf(username, "%s@%s", loginname, fqdn);
 
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    }
 
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}
 
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#ifdef TESTING
 
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int main(int argc, char *argv[]) {
 
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    if (argc == 3 && !strcmp(argv[1], "-u"))
 
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        buildusername(argv[2]);
 
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    else
 
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        buildusername(NULL);
 
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    printf( /* "Automatically generated username is\n" */
 
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           "\"%s\"\n", username);
 
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    return 0;
 
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}
 
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#endif