diff options
Diffstat (limited to 'loginutils/deluser.c')
| -rw-r--r-- | loginutils/deluser.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/loginutils/deluser.c b/loginutils/deluser.c new file mode 100644 index 0000000..5625371 --- /dev/null +++ b/loginutils/deluser.c @@ -0,0 +1,125 @@ +/* vi: set sw=4 ts=4: */ +/* + * deluser/delgroup implementation for busybox + * + * Copyright (C) 1999 by Lineo, inc. and John Beppu + * Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org> + * Copyright (C) 2007 by Tito Ragusa <farmatito@tiscali.it> + * + * Licensed under GPL version 2, see file LICENSE in this tarball for details. + * + */ + +#include "libbb.h" + +/* Status */ +#define STATUS_OK 0 +#define NAME_NOT_FOUND 1 +#define MEMBER_NOT_FOUND 2 + +static void del_line_matching(char **args, + const char *filename, + FILE* FAST_FUNC (*fopen_func)(const char *fileName, const char *mode)) +{ + FILE *passwd; + smallint error = NAME_NOT_FOUND; + char *name = (ENABLE_FEATURE_DEL_USER_FROM_GROUP && args[2]) ? args[2] : args[1]; + char *line, *del; + char *new = xzalloc(1); + + passwd = fopen_func(filename, "r"); + if (passwd) { + while ((line = xmalloc_fgets(passwd))) { + int len = strlen(name); + + if (strncmp(line, name, len) == 0 + && line[len] == ':' + ) { + error = STATUS_OK; + if (ENABLE_FEATURE_DEL_USER_FROM_GROUP) { + struct group *gr; + char *p; + if (args[2] + /* There were two args on commandline */ + && (gr = getgrnam(name)) + /* The group was not deleted in the meanwhile */ + && (p = strrchr(line, ':')) + /* We can find a pointer to the last ':' */ + ) { + error = MEMBER_NOT_FOUND; + /* Move past ':' (worst case to '\0') and cut the line */ + p[1] = '\0'; + /* Reuse p */ + for (p = xzalloc(1); *gr->gr_mem != NULL; gr->gr_mem++) { + /* Add all the other group members */ + if (strcmp(args[1], *gr->gr_mem) != 0) { + del = p; + p = xasprintf("%s%s%s", p, p[0] ? "," : "", *gr->gr_mem); + free(del); + } else + error = STATUS_OK; + } + /* Recompose the line */ + line = xasprintf("%s%s\n", line, p); + if (ENABLE_FEATURE_CLEAN_UP) free(p); + } else + goto skip; + } + } + del = new; + new = xasprintf("%s%s", new, line); + free(del); + skip: + free(line); + } + + if (ENABLE_FEATURE_CLEAN_UP) fclose(passwd); + + if (error) { + if (ENABLE_FEATURE_DEL_USER_FROM_GROUP && error == MEMBER_NOT_FOUND) { + /* Set the correct values for error message */ + filename = name; + name = args[1]; + } + bb_error_msg("can't find %s in %s", name, filename); + } else { + passwd = fopen_func(filename, "w"); + if (passwd) { + fputs(new, passwd); + if (ENABLE_FEATURE_CLEAN_UP) fclose(passwd); + } + } + } + free(new); +} + +int deluser_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int deluser_main(int argc, char **argv) +{ + if (argc == 2 + || (ENABLE_FEATURE_DEL_USER_FROM_GROUP + && (applet_name[3] == 'g' && argc == 3)) + ) { + if (geteuid()) + bb_error_msg_and_die(bb_msg_perm_denied_are_you_root); + + if ((ENABLE_FEATURE_DEL_USER_FROM_GROUP && argc != 3) + || ENABLE_DELUSER + || (ENABLE_DELGROUP && ENABLE_DESKTOP) + ) { + if (ENABLE_DELUSER + && (!ENABLE_DELGROUP || applet_name[3] == 'u') + ) { + del_line_matching(argv, bb_path_passwd_file, xfopen); + if (ENABLE_FEATURE_SHADOWPASSWDS) + del_line_matching(argv, bb_path_shadow_file, fopen_or_warn); + } else if (ENABLE_DESKTOP && ENABLE_DELGROUP && getpwnam(argv[1])) + bb_error_msg_and_die("can't remove primary group of user %s", argv[1]); + } + del_line_matching(argv, bb_path_group_file, xfopen); + if (ENABLE_FEATURE_SHADOWPASSWDS) + del_line_matching(argv, bb_path_gshadow_file, fopen_or_warn); + return EXIT_SUCCESS; + } else + bb_show_usage(); +} |