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static const char rcsid[] = "$Id: colon.c,v 1.29 2004/04/30 17:00:58 will Exp $";
#include "super.h"
#include "version.h"
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* Processes the special ":" builtin commands */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* Return -1 if caller should give up parsing the file;
* return 0 on success;
*/
int
process_colon_cmds(command, continue_after_if)
char *command;
int *continue_after_if; /* return !0 iff a :if command evaluates true,
* and the caller should continue processing the
* rest of the buffer as input text.
*/
{
*continue_after_if = 0;
if ((strcmp(":global", command) == 0) ||
(strcmp(":global_options", command) == 0) ||
(strcmp("/", command) == 0) /*obsolescent*/
) {
/* Process global options */
return colon_global(command);
} else if (strcmp(":define", command) == 0) {
/* Process variable definition */
return colon_define(command);
} else if (strcmp(":die", command) == 0) {
/* Force immediate exit */
return colon_die(command);
} else if (strcmp(":getenv", command) == 0) {
/* Define variable from envvar */
return colon_getenv(command);
} else if (strcmp(":include", command) == 0) {
/* Process include-file directive; don't allow missing files */
return colon_include(command, 0);
} else if (strcmp(":optinclude", command) == 0) {
/* Process include-file directive; allow missing files */
return colon_include(command, 1);
} else if (strcmp(":if", command) == 0) {
/* Process include-file directive */
return colon_if(command, continue_after_if);
}
return Error(0, 0, "%t\n\tUnknown builtin command `%s'.\n", command);
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* Process the :global command */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
int
colon_global(command)
char *command;
{
char *wd;
if (strcmp("/", command) == 0) {
/* OBSOLESCENT COMMAND */
/* Get the full path; verify that it is '/', then discard */
char *path = strqtokS(NULL, SEP, NULL, NULL, 1);
if (!command || !*path || strcmp(path, "/") != 0)
return Error(0, 0, "%t\n\tformat error in super.tab file: \
Cmd == '/' requires FullPathName == '/'.\n");
}
/* Some global settings need to be reset on each new :global line. */
if (handle_option(NULL, NULL, 1) != 0)
return -1;
/* Now collect the options and process */
for (strqS_qm = my_qm, strqS_cc = my_cc,
wd = strqtokS(NULL, SEP, NULL, NULL, 1); wd;
wd = strqtokS(NULL, SEP, NULL, NULL, 1)) {
if (global_arg(wd) == -1)
return -1;
}
/* Process logfile requests as soon as possible */
if (globalinfo.log.newfile || globalinfo.log.newuid)
if (process_logfile_opt() == -1)
return -1;
return 0;
}
/* Process logfile requests */
int
process_logfile_opt()
{
if (globalinfo.log.newuid && !globalinfo.log.newfile)
return Error(0, 0, "%t\n\tformat error in super.tab file: \n\t\
loguid=xxx must be used on the same :global_option line as logfile=yyy.\n");
globalinfo.log.newfile = globalinfo.log.newuid = 0;
opensuperlog();
return 0;
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* Process a global arg */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
int
global_arg(word)
char *word; /* opt=xxx or condition~Pattern or PermittedUserPattern */
{
/* Return 0 on success, -1 if formatting error. */
int invert, iscondition;
char **glob;
char *s;
char *pattern;
if (strcmp("\\", word) == 0)
return 0;
s = word;
if (*s == CONDITION_SEP || *s == OPTION_SEP)
return Error(0, 0, "%t\n\tBad super.tab syntax: <%s>\n", word);
for (s++; *s && ((*s != CONDITION_SEP && *s != OPTION_SEP) ||
(*(s-1) == '\\')); s++)
;
/* s now points to one of:
* - the OPTION_SEP or CONTITION_SEP (if there is one),
* or
* - the null character at the end of a plain PermittedUserPattern.
*/
invert = (*word == '!');
if (invert && *s == OPTION_SEP) {
return Error(0, 0,
"%t\n\tsuper.tab syntax error: options cannot be negated: <%s>\n",
word);
} else if (invert) {
word++;
}
/* Note that word has been advanced past the '!' inversion character */
if (strcmp(word, "<>") == 0) {
/* End of globalinfo.before list. Since we accumulate into
* globalinfo.after list, just move that list over to
* globalinfo.before.
*/
if (invert)
return Error(0, 0, "%t\n\tInvalid global condition \"!<>\"\n");
if (globalinfo.use_after != 0)
return Error(0, 0, "%t\n\tMultiple use of `<>' in :global list.\n");
globalinfo.use_after = 1;
globalinfo.userbefore.next = globalinfo.userafter.next;
globalinfo.userafter.next = NULL;
globalinfo.timebefore.next = globalinfo.timeafter.next;
globalinfo.timeafter.next = NULL;
return 0;
}
iscondition = (*s != OPTION_SEP);
if (iscondition) {
/* Do brace globbing. Remember that if the pattern is a plain
* PermittedUserPattern, then s points to the null character.
* Use a new pointer to point to the actual pattern.
*/
int i;
if (*s == '\0')
pattern = word; /* s pts to end of plain PermittedUserPattern */
else
pattern = s+1; /* s points to "~"; advance past to pattern */
if ((i=globbraces(pattern, 1, &glob)) != 0) {
/* Global condition */
return Error(0, 0, "%tMissing `%c'.\n", i);
}
}
if (iscondition && STRMATCH3("user", word, s)) {
/* It's a PermittedUser pattern */
/* Put the (user/group/host) pattern into the after list.
* If we eventually see "<>", we'll move the list to
* before list (see above).
*/
if (globalinfo.user_clear) {
free_Simple2List(&globalinfo.userbefore);
free_Simple2List(&globalinfo.userafter);
free_SimpleList(&globalinfo.b_a_text);
globalinfo.user_clear = 0;
}
if (InsertUserList(pattern, glob,
&globalinfo.userafter, &globalinfo.b_a_text, invert) == -1)
return -1;
} else if (iscondition && STRMATCH3("time", word, s)) {
/* It's a PermittedTime pattern. Put it into the after list.
* If we eventually see "<>", we'll move the list to
* before list (see above).
*/
if (globalinfo.time_clear) {
free_TimeList(&globalinfo.timebefore);
free_TimeList(&globalinfo.timeafter);
globalinfo.time_clear = 0;
}
if (InsertTimeList(pattern, glob,
&globalinfo.timeafter, "global", invert) == -1)
return -1;
} else if (iscondition) {
return Error(0, 0,
"%t\n\tInternal error -- unrecognized global condition <%s>\n", word);
} else {
return handle_option(word, s+1, 1);
}
return 0;
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* Process the :define command */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
int
colon_define(command)
char *command;
{
extern char *strqS_start;
char *varname, *varbody;
char *s;
varname = strqtokS(NULL, SEP, NULL, NULL, 1);
if (!varname)
return Error(0, 0, "%t\n\tformat error in super.tab file: \
variable name missing after ':define'.\n");
varbody = strqS_start;
if (!varbody)
varbody = "";
/* Skip leading whitespace in variable body */
while (strchr(SEP, *varbody))
varbody++;
/* Delete final newline from varbody */
s = varbody + strlen(varbody)-1;
if (s >= varbody && *s == '\n')
*s = '\0';
return add_variable(varname, varbody);
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* Process the :die command */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
int
colon_die(command)
char *command;
{
char *text;
#ifdef COLLECT_ALL_TOKENS
extern char *strqS_start;
#endif
#ifndef COLLECT_ALL_TOKENS
/* This collects next token only */
text = strqtokS(NULL, SEP, NULL, NULL, 1);
#else
/* This collects all tokens (but comments have been elided); however,
* quotes remain in text.
*/
text = strqS_start;
#endif
Error(0, 1, "%s\n", text);
/* shouldn't ever get here */
return -1;
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* Process the :getenv command */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
int
colon_getenv(command)
char *command;
{
char *varname;
char *defn;
for ( ; (varname = strqtokS(NULL, SEP, NULL, NULL, 1)) ; ) {
defn = getenv(varname);
if (!defn) {
defn = "";
} else if (checkenv(varname, defn, "^[-/:+._a-zA-Z0-9]*$") == -1) {
/* Record the problem but continue. */
Error(0,0, "%t\n\timproper definition of envvar `%s': `%-.500s'\n",
varname, defn);
continue;
}
/* Store value */
if (add_variable(varname, defn) != 0) {
/* Better return -- we couldn't store a definition */
return -1;
}
}
return 0;
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* Process the :if command */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
int
colon_if(command, colonif_succeeded)
char *command;
int *colonif_succeeded;
{
char *left, *op, *right;
left = strqtokS(NULL, SEP, NULL, NULL, 1);
if (!left)
return Error(0, 0, "%t\n\tformat error in super.tab file: \
left operand missing after ':if'.\n");
op = strqtokS(NULL, SEP, NULL, NULL, 1);
if (!op)
return Error(0, 0, "%t\n\tformat error in super.tab file: \
operator missing after ':if'.\n");
right = strqtokS(NULL, SEP, NULL, NULL, 1);
if (!right)
return Error(0, 0, "%t\n\tformat error in super.tab file: \
right operand missing after ':if'.\n");
if (strcmp(op, "==") == 0) {
*colonif_succeeded = (strcmp(left, right) == 0);
} else if (strcmp(op, "!=") == 0) {
*colonif_succeeded = (strcmp(left, right) != 0);
} else if (strcmp(op, "~") == 0) {
*colonif_succeeded = wildmat(left, right);
} else if (strcmp(op, "!~") == 0) {
*colonif_succeeded = (wildmat(left, right) == 0);
} else {
return Error(0, 0, "%t\n\tformat error in super.tab file: \
invalid operator `%s' in ':if'.\n", op);
}
return 0;
}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* Process the :include command */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
int
colon_include(command, allow_missing)
char *command;
int allow_missing; /* don't complain if file is missing */
{
char *filename, *wd, *s, *opt;
extern char *strqS_start;
struct passwd *uid_pw;
struct group *gr;
FileList *fl;
char *owner = NULL; /* xxx from owner=xxx */
char *group = NULL; /* xxx from group=xxx */
uid_t uid; /* uid of owner=xxx; -1 means no owner=xxx is set */
gid_t gid; /* gid of group=xxx; -1 means no group=xxx is set */
filename = strqtokS(NULL, SEP, NULL, NULL, 1);
if (!filename)
return Error(0, 0, "%t\n\tformat error in super.tab file: \
filename missing after ':include'.\n");
/* Check for owner= and group= options */
while ((opt = strqtokS(NULL, SEP, NULL, NULL, 1))) {
/* Check for and delete possible newline from opt */
s = opt + strlen(opt)-1;
if (s >= opt && *s == '\n')
*s = '\0';
if (strncmp(opt, "owner=", 6) == 0) {
owner = opt + 6;
if (*owner == '\0') {
return Error(0, 0,
"%t\n\towner not specified in `owner=' option");
}
} else if (strncmp(opt, "group=", 6) == 0) {
group = opt + 6;
if (*group == '\0') {
return Error(0, 0,
"%t\n\tgroup not specified in `group=' option");
}
} else {
return Error(0, 0,
"%t\n\tgarbage text <%s> after :include command", opt);
}
}
if (owner) {
/* :include line contained owner= entry */
if (!(uid_pw = getpwentry(0, owner))) {
return -1;
}
uid = uid_pw->pw_uid;
}
if (group) {
/* :include line contained owner= entry */
if (!(gr = getgrentry(group))) {
return -1;
}
gid = gr->gr_gid;
}
wd = strqS_start;
if (wd && *wd != '\n' && *wd != '\0')
return Error(0, 0, "%t\n\tformat error in super.tab file: \n\t\
extra text <%s> after :include filename\n", wd);
/* Check for and delete possible newline from filename */
s = filename + strlen(filename)-1;
if (s >= filename && *s == '\n')
*s = '\0';
fl = file_open(currfile, filename, allow_missing,
owner ? &uid : NULL, group ? &gid : NULL);
if (!fl)
return -1;
currfile = fl;
return 0;
}
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