1 /**

     2  * test/demos/getpwnam_error.c

     3  * Copyright (C) 2008 Markus Broeker

     4  */

     5 

     6 #include <stdio.h>

     7 #include <stdlib.h>

     8 

     9 #include <pwd.h>

    10 

    11 /**

    12 ==7531==

    13 ==7531== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 25 from 2)

    14 ==7531== malloc/free: in use at exit: 156 bytes in 11 blocks.

    15 ==7531== malloc/free: 66 allocs, 55 frees, 6,342 bytes allocated.

    16 ==7531== For counts of detected errors, rerun with: -v

    17 ==7531== searching for pointers to 11 not-freed blocks.

    18 ==7531== checked 60,444 bytes.

    19 ==7531==

    20 ==7531== 156 (36 direct, 120 indirect) bytes in 1 blocks are definitely lost in loss record 1 of 3

    21 ==7531==    at 0x4022D6E: malloc (vg_replace_malloc.c:207)

    22 ==7531==    by 0x412C7E0: (within /lib/i686/cmov/libc-2.7.so)

    23 ==7531==    by 0x412D0DB: __nss_database_lookup (in /lib/i686/cmov/libc-2.7.so)

    24 ==7531==    by 0x4596F5B: ???

    25 ==7531==    by 0x4597CF6: ???

    26 ==7531==    by 0x40D3BD1: getpwnam_r (in /lib/i686/cmov/libc-2.7.so)

    27 ==7531==    by 0x40D3646: getpwnam (in /lib/i686/cmov/libc-2.7.so)

    28 ==7531==    by 0x8048478: main (getpwnam_error.c:48)

    29 ==7531==

    30 ==7531== LEAK SUMMARY:

    31 ==7531==    definitely lost: 36 bytes in 1 blocks.

    32 ==7531==    indirectly lost: 120 bytes in 10 blocks.

    33 ==7531==      possibly lost: 0 bytes in 0 blocks.

    34 ==7531==    still reachable: 0 bytes in 0 blocks.

    35 ==7531==         suppressed: 0 bytes in 0 blocks.

    36 */

    37 

    38 int main (int argc, char **argv)

    39 {

    40     struct passwd *pwd;

    41     char *user;

    42 

    43     if ((user = getenv ("USER")) == NULL) {

    44         printf ("This system isn't supported yet\n");

    45         return EXIT_FAILURE;

    46     }

    47 

    48     if ((pwd = getpwnam (user)) == NULL) {

    49         printf ("I wasn't able to retrieve the neccessary data\n");

    50         return EXIT_FAILURE;

    51     }

    52 

    53     printf ("Your full name: %s\n", pwd->pw_gecos);

    54 

    55     return EXIT_SUCCESS;

    56 }