diff options
Diffstat (limited to 'libbb/my_getgrgid.c')
| -rw-r--r-- | libbb/my_getgrgid.c | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/libbb/my_getgrgid.c b/libbb/my_getgrgid.c index e6b877687..8c530964c 100644 --- a/libbb/my_getgrgid.c +++ b/libbb/my_getgrgid.c @@ -19,8 +19,23 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ + /* Hacked by Tito Ragusa (c) 2004 <farmatito@tiscali.it> to make it more + * flexible : + * + * if bufsize is > 0 char *group cannot be set to NULL + * on success groupname is written on static allocated buffer + * on failure gid as string is written to buffer and NULL is returned + * if bufsize is = 0 char *group can be set to NULL + * on success groupname is returned + * on failure NULL is returned + * if bufsize is < 0 char *group can be set to NULL + * on success groupname is returned + * on failure an error message is printed and the program exits + */ + #include <stdio.h> #include <string.h> +#include <assert.h> #include "libbb.h" #include "pwd_.h" #include "grp_.h" @@ -33,10 +48,21 @@ char * my_getgrgid(char *group, long gid, int bufsize) mygroup = getgrgid(gid); if (mygroup==NULL) { - snprintf(group, bufsize, "%ld", gid); + if(bufsize > 0) { + assert(group != NULL); + snprintf(group, bufsize, "%ld", (long)gid); + } + if( bufsize < 0 ) { + bb_error_msg_and_die("unknown gid %ld", (long)gid); + } return NULL; } else { - return safe_strncpy(group, mygroup->gr_name, bufsize); + if(bufsize > 0) + { + assert(group != NULL); + return safe_strncpy(group, mygroup->gr_name, bufsize); + } + return mygroup->gr_name; } } |