static void rescan_crontab_dir(void)
{
CronFile *file;
/* Delete all files until we only have ones with running jobs (or none) */
again:
for (file = G.cron_files; file; file = file->cf_next) {
if (!file->cf_deleted) {
delete_cronfile(file->cf_username);
goto again;
}
}
/* Remove cron update file */
unlink(CRONUPDATE);
/* Re-chdir, in case directory was renamed & deleted */
xchdir(G.crontab_dir_name);
/* Scan directory and add associated users */
{
DIR *dir = opendir(".");
struct dirent *den;
/* xopendir exists, but "can't open '.'" is not informative */
if (!dir)
bb_error_msg_and_die("can't open '%s'", G.crontab_dir_name);
while ((den = readdir(dir)) != NULL) {
if (strchr(den->d_name, '.') != NULL) {
continue;
}
load_crontab(den->d_name);
}
closedir(dir);
}
}
static void load_crontab(const char *fileName)
{
struct parser_t *parser;
struct stat sbuf;
int maxLines;
char *tokens[6];
#if ENABLE_FEATURE_CROND_CALL_SENDMAIL
char *mailTo = NULL;
#endif
char *shell = NULL;
delete_cronfile(fileName);
if (!getpwnam(fileName)) {
log7("ignoring file '%s' (no such user)", fileName);
return;
}
parser = config_open(fileName);
if (!parser)
return;
maxLines = (strcmp(fileName, "root") == 0) ? 65535 : MAXLINES;
if (fstat(fileno(parser->fp), &sbuf) == 0 && sbuf.st_uid == DAEMON_UID) {
CronFile *file = xzalloc(sizeof(CronFile));
CronLine **pline;
int n;
file->cf_username = xstrdup(fileName);
pline = &file->cf_lines;
while (1) {
CronLine *line;
if (!--maxLines) {
bb_error_msg("user %s: too many lines", fileName);
break;
}
n = config_read(parser, tokens, 6, 1, "# \t", PARSE_NORMAL | PARSE_KEEP_COPY);
if (!n)
break;
log5("user:%s entry:%s", fileName, parser->data);
/* check if line is setting MAILTO= */
if (is_prefixed_with(tokens[0], "MAILTO=")) {
#if ENABLE_FEATURE_CROND_CALL_SENDMAIL
free(mailTo);
mailTo = (tokens[0][7]) ? xstrdup(&tokens[0][7]) : NULL;
#endif /* otherwise just ignore such lines */
continue;
}
if (is_prefixed_with(tokens[0], "SHELL=")) {
free(shell);
shell = xstrdup(&tokens[0][6]);
continue;
}
//TODO: handle HOME= too? "man crontab" says:
//name = value
//
//where the spaces around the equal-sign (=) are optional, and any subsequent
//non-leading spaces in value will be part of the value assigned to name.
//The value string may be placed in quotes (single or double, but matching)
//to preserve leading or trailing blanks.
//
//Several environment variables are set up automatically by the cron(8) daemon.
//SHELL is set to /bin/sh, and LOGNAME and HOME are set from the /etc/passwd
//line of the crontab's owner. HOME and SHELL may be overridden by settings
//in the crontab; LOGNAME may not.
/* check if a minimum of tokens is specified */
if (n < 6)
continue;
*pline = line = xzalloc(sizeof(*line));
/* parse date ranges */
ParseField(file->cf_username, line->cl_Mins, 60, 0, NULL, tokens[0]);
ParseField(file->cf_username, line->cl_Hrs, 24, 0, NULL, tokens[1]);
ParseField(file->cf_username, line->cl_Days, 32, 0, NULL, tokens[2]);
ParseField(file->cf_username, line->cl_Mons, 12, -1, MonAry, tokens[3]);
ParseField(file->cf_username, line->cl_Dow, 7, 0, DowAry, tokens[4]);
/*
* fix days and dow - if one is not "*" and the other
* is "*", the other is set to 0, and vise-versa
*/
FixDayDow(line);
#if ENABLE_FEATURE_CROND_CALL_SENDMAIL
/* copy mailto (can be NULL) */
line->cl_mailto = xstrdup(mailTo);
#endif
line->cl_shell = xstrdup(shell);
/* copy command */
line->cl_cmd = xstrdup(tokens[5]);
pline = &line->cl_next;
//bb_error_msg("M[%s]F[%s][%s][%s][%s][%s][%s]", mailTo, tokens[0], tokens[1], tokens[2], tokens[3], tokens[4], tokens[5]);
}
*pline = NULL;
file->cf_next = G.cron_files;
G.cron_files = file;
}
config_close(parser);
#if ENABLE_FEATURE_CROND_CALL_SENDMAIL
free(mailTo);
#endif
free(shell);
}
static void load_crontab(const char *fileName)
{
struct parser_t *parser;
struct stat sbuf;
int maxLines;
char *tokens[6];
#if ENABLE_FEATURE_CROND_CALL_SENDMAIL
char *mailTo = NULL;
#endif
char *shell = NULL;
delete_cronfile(fileName);
if (!getpwnam(fileName)) {
log7("ignoring file '%s' (no such user)", fileName);
return;
}
parser = config_open(fileName);
if (!parser)
return;
maxLines = (strcmp(fileName, "root") == 0) ? 65535 : MAXLINES;
if (fstat(fileno(parser->fp), &sbuf) == 0 && sbuf.st_uid == DAEMON_UID) {
CronFile *file = xzalloc(sizeof(CronFile));
CronLine **pline;
int n;
file->cf_username = xstrdup(fileName);
pline = &file->cf_lines;
while (1) {
CronLine *line;
if (!--maxLines) {
bb_error_msg("user %s: too many lines", fileName);
break;
}
n = config_read(parser, tokens, 6, 1, "# \t", PARSE_NORMAL | PARSE_KEEP_COPY);
if (!n)
break;
log5("user:%s entry:%s", fileName, parser->data);
/* check if line is setting MAILTO= */
if (is_prefixed_with(tokens[0], "MAILTO=")) {
#if ENABLE_FEATURE_CROND_CALL_SENDMAIL
free(mailTo);
mailTo = (tokens[0][7]) ? xstrdup(&tokens[0][7]) : NULL;
#endif /* otherwise just ignore such lines */
continue;
}
if (is_prefixed_with(tokens[0], "SHELL=")) {
free(shell);
shell = xstrdup(&tokens[0][6]);
continue;
}
//TODO: handle HOME= too? "man crontab" says:
//name = value
//
//where the spaces around the equal-sign (=) are optional, and any subsequent
//non-leading spaces in value will be part of the value assigned to name.
//The value string may be placed in quotes (single or double, but matching)
//to preserve leading or trailing blanks.
//
//Several environment variables are set up automatically by the cron(8) daemon.
//SHELL is set to /bin/sh, and LOGNAME and HOME are set from the /etc/passwd
//line of the crontab's owner. HOME and SHELL may be overridden by settings
//in the crontab; LOGNAME may not.
#if ENABLE_FEATURE_CROND_SPECIAL_TIMES
if (tokens[0][0] == '@') {
/*
* "@daily /a/script/to/run PARAM1 PARAM2..."
*/
typedef struct SpecialEntry {
const char *name;
const char tokens[8];
} SpecialEntry;
static const SpecialEntry SpecAry[] = {
/* hour day month weekday */
{ "yearly", "0\0" "1\0" "1\0" "*" },
{ "annually", "0\0" "1\0" "1\0" "*" },
{ "monthly", "0\0" "1\0" "*\0" "*" },
{ "weekly", "0\0" "*\0" "*\0" "0" },
{ "daily", "0\0" "*\0" "*\0" "*" },
{ "midnight", "0\0" "*\0" "*\0" "*" },
{ "hourly", "*\0" "*\0" "*\0" "*" },
{ "reboot", "" },
};
const SpecialEntry *e = SpecAry;
if (n < 2)
continue;
for (;;) {
if (strcmp(e->name, tokens[0] + 1) == 0) {
/*
* tokens[1] is only the first word of command,
* can'r use it.
* find the entire command in unmodified string:
*/
tokens[5] = skip_whitespace(
skip_non_whitespace(
skip_whitespace(parser->data)));
if (e->tokens[0]) {
char *et = (char*)e->tokens;
/* minute is "0" for all specials */
tokens[0] = (char*)"0";
tokens[1] = et;
tokens[2] = et + 2;
tokens[3] = et + 4;
tokens[4] = et + 6;
}
goto got_it;
}
if (!e->tokens[0])
break;
e++;
}
continue; /* bad line (unrecognized '@foo') */
}
#endif
/* check if a minimum of tokens is specified */
if (n < 6)
continue;
IF_FEATURE_CROND_SPECIAL_TIMES(
got_it:
)
*pline = line = xzalloc(sizeof(*line));
#if ENABLE_FEATURE_CROND_SPECIAL_TIMES
if (tokens[0][0] == '@') { /* "@reboot" line */
file->cf_wants_starting = 1;
line->cl_pid = START_ME_REBOOT; /* wants to start */
/* line->cl_Mins/Hrs/etc stay zero: never match any time */
} else
#endif
{
/* parse date ranges */
ParseField(file->cf_username, line->cl_Mins, 60, 0, NULL, tokens[0]);
ParseField(file->cf_username, line->cl_Hrs, 24, 0, NULL, tokens[1]);
ParseField(file->cf_username, line->cl_Days, 32, 0, NULL, tokens[2]);
ParseField(file->cf_username, line->cl_Mons, 12, -1, MonAry, tokens[3]);
ParseField(file->cf_username, line->cl_Dow, 7, 0, DowAry, tokens[4]);
/*
* fix days and dow - if one is not "*" and the other
* is "*", the other is set to 0, and vise-versa
*/
FixDayDow(line);
}
#if ENABLE_FEATURE_CROND_CALL_SENDMAIL
/* copy mailto (can be NULL) */
line->cl_mailto = xstrdup(mailTo);
#endif
line->cl_shell = xstrdup(shell);
/* copy command */
line->cl_cmd = xstrdup(tokens[5]);
pline = &line->cl_next;
//bb_error_msg("M[%s]F[%s][%s][%s][%s][%s][%s]", mailTo, tokens[0], tokens[1], tokens[2], tokens[3], tokens[4], tokens[5]);
}
*pline = NULL;
file->cf_next = G.cron_files;
G.cron_files = file;
}
