diff options
Diffstat (limited to 'libbb/update_passwd.c')
| -rw-r--r-- | libbb/update_passwd.c | 38 |
1 files changed, 36 insertions, 2 deletions
diff --git a/libbb/update_passwd.c b/libbb/update_passwd.c index a30af6f72..dc26ebd1d 100644 --- a/libbb/update_passwd.c +++ b/libbb/update_passwd.c @@ -62,6 +62,8 @@ static void check_selinux_update_passwd(const char *username) only if CONFIG_PASSWD=y and applet_name[0] == 'p' like in passwd or if CONFIG_CHPASSWD=y and applet_name[0] == 'c' like in chpasswd + 8) delete a user from all groups: update_passwd(FILE, NULL, NULL, MEMBER) + This function does not validate the arguments fed to it so the calling program should take care of that. @@ -99,12 +101,13 @@ int FAST_FUNC update_passwd(const char *filename, if (filename == NULL) return ret; - check_selinux_update_passwd(name); + if (name) + check_selinux_update_passwd(name); /* New passwd file, "/etc/passwd+" for now */ fnamesfx = xasprintf("%s+", filename); sfx_char = &fnamesfx[strlen(fnamesfx)-1]; - name_colon = xasprintf("%s:", name); + name_colon = xasprintf("%s:", name ? name : ""); user_len = strlen(name_colon); if (shadow) @@ -167,6 +170,37 @@ int FAST_FUNC update_passwd(const char *filename, line = xmalloc_fgetline(old_fp); if (!line) /* EOF/error */ break; + + if (!name && member) { + /* Delete member from all groups */ + /* line is "GROUP:PASSWD:[member1[,member2]...]" */ + unsigned member_len = strlen(member); + char *list = strrchr(line, ':'); + while (list) { + list++; + next_list_element: + if (strncmp(list, member, member_len) == 0) { + char c; + changed_lines++; + c = list[member_len]; + if (c == '\0') { + if (list[-1] == ',') + list--; + *list = '\0'; + break; + } + if (c == ',') { + overlapping_strcpy(list, list + member_len + 1); + goto next_list_element; + } + changed_lines--; + } + list = strchr(list, ','); + } + fprintf(new_fp, "%s\n", line); + goto next; + } + if (strncmp(name_colon, line, user_len) != 0) { fprintf(new_fp, "%s\n", line); goto next; |