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/src/util/username.c

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C | 47 lines | 13 code | 7 blank | 27 comment | 2 complexity | 124e6fcf895def5e573765bea7b8814d MD5 | raw file
Possible License(s): IPL-1.0, AGPL-3.0 
    

  1. /*++
    2. 

  2. /* NAME
    3. 

  3. /*	username 3
    4. 

  4. /* SUMMARY
    5. 

  5. /*	lookup name of real user
    6. 

  6. /* SYNOPSIS
    7. 

  7. /*	#include <username.h>
    8. 

  8. /*
    9. 

  9. /*	const char *username()
    10. 

  10. /* DESCRIPTION
    11. 

  11. /*	username() jumps whatever system-specific hoops it takes to
    12. 

  12. /*	get the name of the user who started the process. The result
    13. 

  13. /*	is volatile. Make a copy if it is to be used for an appreciable
    14. 

  14. /*	amount of time.
    15. 

  15. /* LICENSE
    16. 

  16. /* .ad
    17. 

  17. /* .fi
    18. 

  18. /*	The Secure Mailer license must be distributed with this software.
    19. 

  19. /* AUTHOR(S)
    20. 

  20. /*	Wietse Venema
    21. 

  21. /*	IBM T.J. Watson Research
    22. 

  22. /*	P.O. Box 704
    23. 

  23. /*	Yorktown Heights, NY 10598, USA
    24. 

  24. /*--*/
    25. 

  25. 

  26. /* System library. */
    27. 

  27. 

  28. #include <sys_defs.h>
    29. 

  29. #include <unistd.h>
    30. 

  30. #include <pwd.h>
    31. 

  31. 

  32. /* Utility library. */
    33. 

  33. 

  34. #include "username.h"
    35. 

  35. 

  36. /* username - get name of user */
    37. 

  37. 

  38. const char *username(void)
    39. 

  39. {
    40. 

  40.     uid_t   uid;
    41. 

  41.     struct passwd *pwd;
    42. 

  42. 

  43.     uid = getuid();
    44. 

  44.     if ((pwd = getpwuid(uid)) == 0)
    45. 

  45. 	return (0);
    46. 

  46.     return (pwd->pw_name);
    47. 

  47. }
    48. 

  48.