Your IP : 216.73.216.40
/*
* FCRON - periodic command scheduler
*
* Copyright 2000-2016 Thibault Godouet <fcron@free.fr>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* The GNU General Public License can also be found in the file
* `LICENSE' that comes with the fcron source distribution.
*/
#include "fcrontab.h"
#include "fileconf.h"
char *get_string(char *ptr);
int get_line(char *str, size_t size, FILE * file);
void init_default_line(cl_t * cl, cf_t * cf);
char *get_time(char *ptr, time_t * time, int zero_allowed);
char *get_num(char *ptr, int *num, int max, short int decimal,
const char **names);
char *get_nice(char *ptr, int *nice);
char *get_bool(char *ptr, int *i);
char *read_field(char *ptr, bitstr_t * ary, int max, const char **names);
void read_freq(char *ptr, cf_t * cf);
void read_arys(char *ptr, cf_t * cf);
void read_period(char *ptr, cf_t * cf);
int read_shortcut(char *ptr, cf_t * cf);
void read_env(char *ptr, cf_t * cf);
char *read_opt(char *ptr, cl_t * cl);
char *check_username(char *ptr, cf_t * cf, cl_t * cl);
size_t option_strlen(char *value);
char need_correction;
cl_t default_line; /* default options for a line */
char *file_name;
int line;
/* warning : all names must have the same length */
const char *dows_ary[] = {
"sun", "mon", "tue", "wed", "thu", "fri", "sat",
NULL
};
/* warning : all names must have the same length */
const char *mons_ary[] = {
"jan", "feb", "mar", "apr", "may", "jun",
"jul", "aug", "sep", "oct", "nov", "dec",
NULL
};
#define GET_LINE_EOF 999
char *
get_string(char *ptr)
/* read string pointed by ptr, remove blanks and manage
* string placed in quotes */
/* return NULL on mismatched quotes */
{
char quote = 0;
int length = 0;
char *rtn_string = NULL;
if (*ptr == '\"' || *ptr == '\'') {
quote = *ptr;
ptr++;
}
length = remove_blanks(ptr);
if (quote != 0) {
if (*(ptr + length - 1) == quote)
*(ptr + length - 1) = '\0';
else {
/* mismatched quotes */
need_correction = 1;
return NULL;
}
}
Set(rtn_string, ptr);
return rtn_string;
}
int
get_line(char *str, size_t size, FILE * file)
/* similar to fgets, but increase line if necessary,
* and continue over an "\" followed by an "\n" char */
{
size_t size_max = size - 1;
int i = 0;
int c;
while (i < size_max) {
switch (c = getc(file)) {
case '\n':
/* check if the \n char is preceded by a "\" char :
* in this case, suppress the "\", don't copy the \n,
* and continue */
if (i > 0 && *(str + i - 1) == '\\') {
i--;
line++;
continue;
}
else {
*(str + i) = (char)'\0';
return OK;
}
break;
case EOF:
*(str + i) = (char)'\0';
/* we couldn't return EOF ( equal to ERR by default )
* nor ERR, which is used for another error */
return GET_LINE_EOF;
default:
*(str + i) = (char)c;
i++;
}
}
/* line is too long : goto next line and return ERR */
while (((c = getc(file)) != EOF) && (c != '\n')) ;
line++;
need_correction = 1;
return ERR;
}
void
init_default_line(cl_t * cl, cf_t * cf)
/* clear all context/options from cl */
{
bzero(cl, sizeof(cl_t));
Set(cl->cl_runas, runas);
Set(cl->cl_mailto, runas);
Free_safe(cl->cl_tz);
set_default_opt(cl->cl_option);
cl->cl_file = cf;
}
int
read_file(char *filename, int fd)
/* read file "name" and append cf_t list */
{
cf_t *cf = NULL;
FILE *file = NULL;
char buf[LINE_LEN];
int max_lines;
int max_entries = MAXENTRIES;
int entries = 0;
char *ptr = NULL;
int ret;
bzero(buf, sizeof(buf));
need_correction = 0;
line = 1;
file_name = filename;
/* open file */
if ((file = fdopen(fd, "r")) == NULL) {
fprintf(stderr, "Could not open \"%s\": %s\n", file_name,
strerror(errno));
return ERR;
}
/* Rewind, just in case */
rewind(file);
Alloc(cf, cf_t);
cf->cf_env_list = env_list_init();
Set(cf->cf_user, user);
init_default_line(&default_line, cf);
if (debug_opt)
fprintf(stderr, "FILE %s\n", file_name);
if (strcmp(runas, ROOTNAME) == 0)
max_entries = 65535;
/* max_lines acts here as a security counter to avoid endless loop. */
max_lines = (max_entries * 10) + 10;
while (entries < max_entries && line <= max_lines) {
ret = get_line(buf, sizeof(buf), file);
if (ret == ERR) {
fprintf(stderr,
"%s:%d: Line is too long (more than %d): skipping line.\n",
file_name, line, (int)sizeof(buf));
continue;
}
ptr = buf;
Skip_blanks(ptr);
if (debug_opt && *ptr != '#' && *ptr != '\0')
fprintf(stderr, " %s\n", buf);
switch (*ptr) {
case '#':
case '\0':
/* comments or empty line: skipping */
break;
case '@':
/* if it is not a shortcut line then read_shortcut() won't do anything. */
if (!read_shortcut(ptr, cf))
read_freq(ptr, cf);
entries++;
break;
case '&':
read_arys(ptr, cf);
entries++;
break;
case '%':
read_period(ptr, cf);
entries++;
break;
case '!':
ptr = read_opt(ptr, &default_line);
if (ptr != NULL && *ptr != '\0') {
fprintf(stderr, "%s:%d: Syntax error: string \"%s\" ignored\n",
file_name, line, ptr);
need_correction = 1;
}
break;
default:
if (isdigit((int)*ptr) || *ptr == '*') {
read_arys(ptr, cf);
entries++;
}
else
read_env(ptr, cf);
}
line++;
if (ret != OK)
/* in this case, ret == GET_LINE_EOF :
* no more lines, so we exit the loop */
break;
}
if (entries == max_entries) {
error("%s:%d: maximum number of entries (%d) has been reached by %s",
file_name, line, user);
fprintf(stderr, "Anything after this line will be ignored\n");
}
else if (line == max_lines)
error("%s:%d: maximum number of lines (%d) has been reached by %s",
file_name, line, user);
cf->cf_next = file_base;
file_base = cf;
/* don't close as underlying fd may still be used by calling function */
if (fflush(file) != 0)
error_e("could not fflush() file_name");
Free_safe(default_line.cl_runas);
Free_safe(default_line.cl_mailfrom);
Free_safe(default_line.cl_mailto);
Free_safe(default_line.cl_tz);
if (!need_correction)
return OK;
else
return 2;
}
void
read_env(char *ptr, cf_t * cf)
/* append env variable list.
* (remove blanks) */
{
char name[LINE_LEN];
int j = 0;
char *val = NULL;
bzero(name, sizeof(name));
/* copy env variable's name */
while ((isalnum((int)*ptr) || *ptr == '_') && *ptr != '='
&& !isspace((int)*ptr) && j < sizeof(name)) {
name[j++] = *ptr;
ptr++;
}
name[j] = '\0';
if (name[0] == '\0')
goto error;
/* skip '=' and spaces around */
while (isspace((int)*ptr))
ptr++;
/* if j == 0 name is a zero length string */
if (*ptr++ != '=' || j == 0)
goto error;
while (isspace((int)*ptr))
ptr++;
/* get value */
if ((val = get_string(ptr)) == NULL) {
fprintf(stderr, "%s:%d: Mismatched quotes: skipping line.\n",
file_name, line);
need_correction = 1;
return;
}
if (debug_opt)
fprintf(stderr, " Env : '%s=%s'\n", name, val);
/* we ignore USER/LOGNAME's assignment */
if (strcmp(name, "USER") == 0 || strcmp(name, "LOGNAME") == 0) {
fprintf(stderr,
"%s:%d: USER or LOGNAME assignement is not allowed: ignored.\n",
file_name, line);
return;
}
/* the MAILFROM/MAILTO assignment is, in fact, an fcron option :
* we don't store it in the same way. */
/* please note that we check if the mailto is valid in conf.c */
if (strcmp(name, "MAILFROM") == 0) {
Set(default_line.cl_mailfrom, val);
}
else if (strcmp(name, "MAILTO") == 0) {
/* cl_mailto must not be NULL (as expected in
* conf.c:add_line_to_file()), so we check if the length is >= 0 */
if (strcmp(val, "\0") == 0) {
clear_mail(default_line.cl_option);
clear_mailzerolength(default_line.cl_option);
}
else {
Set(default_line.cl_mailto, val);
set_mail(default_line.cl_option);
}
}
else {
env_list_setenv(cf->cf_env_list, name, val, 1);
}
Free_safe(val);
return;
error:
fprintf(stderr, "%s:%d: Syntax error: skipping line.\n", file_name, line);
need_correction = 1;
return;
}
char *
get_nice(char *ptr, int *nice)
/* read a nice value and put it in variable nice */
{
char negative = 0;
if (*ptr == '-') {
negative = 1;
ptr++;
}
if ((ptr = get_num(ptr, nice, 20, 0, NULL)) == NULL)
return NULL;
if (negative == 1) {
if (getuid() != rootuid) {
fprintf(stderr, "must be privileged to use a negative argument "
"with nice: set to 0\n");
need_correction = 1;
*nice = 0;
}
*nice *= (-1);
}
return ptr;
}
size_t
option_strlen(char *value)
/* return the length of the string value of an option */
{
char *ptr = value;
size_t len = 0;
/* look for the end of the option value */
while (ptr != NULL && *ptr != ')' && *ptr != '\0') {
ptr++;
len++;
}
return len;
}
int
assign_option_string(char **var, char *value)
/* Read the value of an option: if non-empty, assign it to the var,
* otherwise set to NULL.
* Returns the length of the value (0 if empty), or -1 on error. */
{
char start = value[0];
char end = '\0';
size_t len = 0;
Free_safe(*var);
len = option_strlen(value);
if (len <= 0) {
return len;
}
end = value[len - 1];
/* spaces and quotes are not allowed before or after the value */
if (isspace((int)start) || isspace((int)end)
|| start == '\'' || start == '"' || end == '\'' || end == '"') {
return -1;
}
*var = strndup2(value, len);
return len;
}
char *
get_bool(char *ptr, int *i)
/* get a bool value : either true (1) or false (0)
* return NULL on error */
{
if (*ptr == '1')
goto true;
else if (*ptr == '0')
goto false;
else if (strncmp(ptr, "true", 4) == 0) {
ptr += 3;
goto true;
}
else if (strncmp(ptr, "yes", 3) == 0) {
ptr += 2;
goto true;
}
else if (strncmp(ptr, "false", 5) == 0) {
ptr += 4;
goto false;
}
else if (strncmp(ptr, "no", 2) == 0) {
ptr += 1;
goto false;
}
else
return NULL;
true:
*i = 1;
ptr++;
return ptr;
false:
*i = 0;
ptr++;
return ptr;
}
char *
read_opt(char *ptr, cl_t * cl)
/* read one or several options and fill in the field "option" */
{
char opt_name[20];
int i;
char in_brackets;
#define Handle_err \
{ \
fprintf(stderr, "%s:%d: Argument(s) for option \"%s\" not valid: " \
"skipping end of line.\n", file_name, line, opt_name); \
need_correction = 1; \
return NULL; \
}
if (*ptr == '!')
ptr++;
do {
i = 0;
bzero(opt_name, sizeof(opt_name));
while (isalnum((int)*ptr) && i < sizeof(opt_name))
opt_name[i++] = *ptr++;
i = 1;
in_brackets = 0;
if (*ptr == '(') {
in_brackets = 1;
ptr++;
/* spaces are not allowed -- make sure there is no leading space. */
if (isspace((int)*ptr)) {
Handle_err;
}
}
/* global options for a file */
if (strcmp(opt_name, "tzdiff") == 0) {
char negative = 0;
if (!in_brackets)
Handle_err;
if (*ptr == '-') {
negative = 1;
ptr++;
}
if ((ptr = get_num(ptr, &i, 24, 0, NULL)) == NULL)
Handle_err;
if (negative)
cl->cl_file->cf_tzdiff = (-i);
else
cl->cl_file->cf_tzdiff = i;
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" (-)%d\n", opt_name, i);
}
/* options related to a line (or a set of lines) */
else if (strcmp(opt_name, "timezone") == 0) {
int len = -1;
if (!in_brackets) {
Handle_err;
}
/* assign_option_string() will set cl_tz to NULL is the value is empty,
* which means "use the system timezone" */
len = assign_option_string(&(cl->cl_tz), ptr);
if (len < 0) {
Handle_err;
}
else {
ptr += len;
}
if (debug_opt) {
fprintf(stderr, " Opt : \"%s\" \"%s\"\n", opt_name, cl->cl_tz);
}
}
else if (strcmp(opt_name, "s") == 0 || strcmp(opt_name, "serial") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
clear_serial(cl->cl_option);
else
set_serial(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "serialonce") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
set_serial_sev(cl->cl_option);
else
clear_serial_sev(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "lavgonce") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
set_lavg_sev(cl->cl_option);
else
clear_lavg_sev(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "exesev") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
clear_exe_sev(cl->cl_option);
else
set_exe_sev(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "b") == 0 || strcmp(opt_name, "bootrun") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
clear_bootrun(cl->cl_option);
else
set_bootrun(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "rebootreset") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
clear_rebootreset(cl->cl_option);
else
set_rebootreset(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "runatreboot") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
clear_runatreboot(cl->cl_option);
else
set_runatreboot(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "runatresume") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
clear_runatresume(cl->cl_option);
else
set_runatresume(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "runonce") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
clear_runonce(cl->cl_option);
else
set_runonce(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "reset") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 1) {
init_default_line(cl, cl->cl_file);
}
if (debug_opt)
fprintf(stderr, " Opt : \"%s\"\n", opt_name);
}
else if (strcmp(opt_name, "f") == 0 || strcmp(opt_name, "first") == 0) {
if (!in_brackets
|| (ptr = get_time(ptr, &(cl->cl_first), 1)) == NULL)
Handle_err;
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %ld\n", opt_name,
(long int)cl->cl_first);
}
else if (strcmp(opt_name, "r") == 0 || strcmp(opt_name, "runfreq") == 0) {
if (cl->cl_runfreq == 1) {
fprintf(stderr, "cannot change runfreq value in a %%-line");
Handle_err;
}
if (!in_brackets
|| (ptr = get_num(ptr, &i, USHRT_MAX, 0, NULL)) == NULL)
Handle_err;
if (i <= 1) {
fprintf(stderr, "runfreq must be 2 or more.\n");
Handle_err;
}
cl->cl_runfreq = i;
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "strict") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
clear_strict(cl->cl_option);
else
set_strict(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "noticenotrun") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
clear_notice_notrun(cl->cl_option);
else
set_notice_notrun(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "lavg") == 0) {
if (!in_brackets
|| (ptr = get_num(ptr, &i, UCHAR_MAX, 1, NULL)) == NULL)
Handle_err;
cl->cl_lavg[0] = i;
if (debug_opt)
fprintf(stderr, " Opt : 'lavg1' %d\n", i);
if (*ptr++ != ',')
Handle_err;
if (!in_brackets
|| (ptr = get_num(ptr, &i, UCHAR_MAX, 1, NULL)) == NULL)
Handle_err;
cl->cl_lavg[1] = i;
if (debug_opt)
fprintf(stderr, " Opt : 'lavg5' %d\n", i);
if (*ptr++ != ',')
Handle_err;
if (!in_brackets
|| (ptr = get_num(ptr, &i, UCHAR_MAX, 1, NULL)) == NULL)
Handle_err;
cl->cl_lavg[2] = i;
if (debug_opt)
fprintf(stderr, " Opt : 'lavg15' %d\n", i);
if (cl->cl_lavg[0] || cl->cl_lavg[1] || cl->cl_lavg[2])
set_lavg(cl->cl_option);
else
clear_lavg(cl->cl_option);
#ifdef NOLOADAVG
warn("As fcron has been compiled with no procfs support,\n"
"you will not be able to use the lavg* options");
#endif /* NOLOADAVG */
}
else if (strcmp(opt_name, "lavg1") == 0) {
if (!in_brackets
|| (ptr = get_num(ptr, &i, UCHAR_MAX, 1, NULL)) == NULL)
Handle_err;
cl->cl_lavg[0] = i;
if (cl->cl_lavg[0] || cl->cl_lavg[1] || cl->cl_lavg[2])
set_lavg(cl->cl_option);
else
clear_lavg(cl->cl_option);
#if NOLOADAVG
warn("As fcron has been compiled with no procfs support,\n"
"you will not be able to use the lavg* options");
#endif /* NOLOADAVG */
if (debug_opt)
fprintf(stderr, " Opt : 'lavg1' %d\n", i);
}
else if (strcmp(opt_name, "lavg5") == 0) {
if (!in_brackets
|| (ptr = get_num(ptr, &i, UCHAR_MAX, 1, NULL)) == NULL)
Handle_err;
cl->cl_lavg[1] = i;
if (cl->cl_lavg[0] || cl->cl_lavg[1] || cl->cl_lavg[2])
set_lavg(cl->cl_option);
else
clear_lavg(cl->cl_option);
#ifdef NOLOADAVG
warn("As fcron has been compiled with no procfs support,\n"
"you will not be able to use the lavg* options");
#endif /* NOLOADAVG = 0 */
if (debug_opt)
fprintf(stderr, " Opt : 'lavg5' %d\n", i);
}
else if (strcmp(opt_name, "lavg15") == 0) {
if (!in_brackets
|| (ptr = get_num(ptr, &i, UCHAR_MAX, 1, NULL)) == NULL)
Handle_err;
cl->cl_lavg[2] = i;
if (cl->cl_lavg[0] || cl->cl_lavg[1] || cl->cl_lavg[2])
set_lavg(cl->cl_option);
else
clear_lavg(cl->cl_option);
#ifdef NOLOADAVG
warn("As fcron has been compiled with no procfs support,\n"
"you will not be able to use the lavg* options");
#endif /* NOLOADAVG = 0 */
if (debug_opt)
fprintf(stderr, " Opt : 'lavg15' %d\n", i);
}
else if (strcmp(opt_name, "lavgand") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
set_lor(cl->cl_option);
else
set_land(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "lavgor") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
set_land(cl->cl_option);
else
set_lor(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "u") == 0 || strcmp(opt_name, "until") == 0) {
if (!in_brackets
|| (ptr = get_time(ptr, &(cl->cl_until), 0)) == NULL)
Handle_err;
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %ld\n", opt_name,
(long int)cl->cl_until);
}
else if (strcmp(opt_name, "m") == 0 || strcmp(opt_name, "mail") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0) {
clear_mail(cl->cl_option);
clear_mailzerolength(cl->cl_option);
}
else
set_mail(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "forcemail") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
clear_mailzerolength(cl->cl_option);
else {
set_mailzerolength(cl->cl_option);
set_mail(cl->cl_option);
}
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "mailfrom") == 0) {
int len = -1;
if (!in_brackets) {
Handle_err;
}
/* Also please note that we check if the mailfrom is valid in conf.c */
len = assign_option_string(&(cl->cl_mailfrom), ptr);
if (len < 0) {
Handle_err;
}
else {
ptr += len;
}
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" \"%s\"\n", opt_name,
cl->cl_mailfrom);
}
else if (strcmp(opt_name, "mailto") == 0) {
int len = -1;
if (!in_brackets) {
Handle_err;
}
/* assign_option_string() set the value to NULL if the length is zero.
* However cl_mailto must not be NULL (as expected in
* conf.c:add_line_to_file()), so we check if the length is >= 0
* before calling assign_option_string() */
/* Also please note that we check if the mailto is valid in conf.c */
len = option_strlen(ptr);
if (len <= 0) {
clear_mail(cl->cl_option);
clear_mailzerolength(cl->cl_option);
if (debug_opt) {
fprintf(stderr, " Opt : \"mail\" 0\n");
fprintf(stderr, " Opt : \"forcemail\" 0\n");
}
}
else {
len = assign_option_string(&(cl->cl_mailto), ptr);
if (len < 0) {
Handle_err;
}
else {
ptr += len;
set_mail(cl->cl_option);
}
}
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" \"%s\"\n", opt_name,
cl->cl_mailto);
}
else if (strcmp(opt_name, "erroronlymail") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
clear_erroronlymail(cl->cl_option);
else
set_erroronlymail(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "dayand") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
set_dayor(cl->cl_option);
else
set_dayand(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "dayor") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
set_dayand(cl->cl_option);
else
set_dayor(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "nolog") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
clear_nolog(cl->cl_option);
else
set_nolog(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "volatile") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
clear_volatile(cl->cl_option);
else
set_volatile(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "stdout") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
clear_stdout(cl->cl_option);
else
set_stdout(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "n") == 0 || strcmp(opt_name, "nice") == 0) {
if (!in_brackets || (ptr = get_nice(ptr, &i)) == NULL)
Handle_err;
cl->cl_nice = (char)i;
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" (-)%d\n", opt_name, i);
}
else if (strcmp(opt_name, "runas") == 0) {
int len = -1;
char *runas = NULL;
struct passwd *pas;
if (!in_brackets) {
Handle_err;
}
len = assign_option_string(&runas, ptr);
if (len <= 0) {
Handle_err;
}
else {
ptr += len;
}
if (getuid() != rootuid) {
fprintf(stderr, "must be privileged to use option runas: "
"skipping option\n");
need_correction = 1;
}
else if (len > USER_NAME_LEN) {
fprintf(stderr, "runas: user name \"%s\" longer than %d"
"characters: skipping option\n", runas, USER_NAME_LEN);
need_correction = 1;
}
else if ((pas = getpwnam(runas)) == NULL) {
fprintf(stderr, "runas: \"%s\" is not in passwd file : "
"ignored", runas);
need_correction = 1;
}
if (need_correction) {
Free_safe(runas);
}
else {
/* only set cl_runas if all is well, as cl_runas MUST always
* be set to a valid value */
Set(cl->cl_runas, runas);
}
/* all good */
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %s ptr=%p\n", opt_name,
cl->cl_runas, cl->cl_runas);
}
else if (strcmp(opt_name, "random") == 0) {
if (in_brackets && (ptr = get_bool(ptr, &i)) == NULL)
Handle_err;
if (i == 0)
clear_random(cl->cl_option);
else
set_random(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
else if (strcmp(opt_name, "jitter") == 0) {
if (!in_brackets
|| (ptr = get_num(ptr, &i, UCHAR_MAX, 0, NULL)) == NULL)
Handle_err;
cl->cl_jitter = i;
if (debug_opt)
fprintf(stderr, " Opt : \"%s\" %d\n", opt_name, i);
}
/* handle %-line : we check if we are really in a %-line (which we do not do
* for other options), because writing "&hourly" in a fcrontab results in an
* error (hourly ignored) hard to find, and, in any case, annoying. */
else if (cl->cl_runfreq == 1) {
/* options to run once per interval :
* ignore every fields below the limit */
if (strcmp(opt_name, "mins") == 0) {
/* nothing to do */
if (debug_opt)
fprintf(stderr, " Opt : \"%s\"\n", opt_name);
}
else if (strcmp(opt_name, "hours") == 0) {
set_freq_mins(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\"\n", opt_name);
}
else if (strcmp(opt_name, "days") == 0) {
set_freq_mins(cl->cl_option);
set_freq_hrs(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\"\n", opt_name);
}
else if (strcmp(opt_name, "mons") == 0) {
set_freq_mins(cl->cl_option);
set_freq_hrs(cl->cl_option);
set_freq_days(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\"\n", opt_name);
}
else if (strcmp(opt_name, "dow") == 0) {
set_freq_mins(cl->cl_option);
set_freq_hrs(cl->cl_option);
set_freq_days(cl->cl_option);
set_freq_mons(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\"\n", opt_name);
}
/* run once an element of the selected field
* (once an hour, once a day, etc) */
else if (strcmp(opt_name, "hourly") == 0) {
set_freq_hrs(cl->cl_option);
set_freq_periodically(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\"\n", opt_name);
}
else if (strcmp(opt_name, "daily") == 0) {
set_freq_days(cl->cl_option);
set_freq_periodically(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\"\n", opt_name);
}
else if (strcmp(opt_name, "monthly") == 0) {
set_freq_mons(cl->cl_option);
set_freq_periodically(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\"\n", opt_name);
}
else if (strcmp(opt_name, "weekly") == 0) {
set_freq_dow(cl->cl_option);
set_freq_periodically(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\"\n", opt_name);
}
/* run once an element of the selected field
* from middle to middle of that field
* (ie once from 12h to 12h the following day) */
else if (strcmp(opt_name, "midhourly") == 0) {
set_freq_hrs(cl->cl_option);
set_freq_periodically(cl->cl_option);
set_freq_mid(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\"\n", opt_name);
}
else if (strcmp(opt_name, "middaily") == 0
|| strcmp(opt_name, "nightly") == 0) {
set_freq_days(cl->cl_option);
set_freq_periodically(cl->cl_option);
set_freq_mid(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\"\n", opt_name);
}
else if (strcmp(opt_name, "midmonthly") == 0) {
set_freq_mons(cl->cl_option);
set_freq_periodically(cl->cl_option);
set_freq_mid(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\"\n", opt_name);
}
else if (strcmp(opt_name, "midweekly") == 0) {
set_freq_dow(cl->cl_option);
set_freq_periodically(cl->cl_option);
set_freq_mid(cl->cl_option);
if (debug_opt)
fprintf(stderr, " Opt : \"%s\"\n", opt_name);
}
}
else {
fprintf(stderr, "%s:%d: Option \"%s\" unknown: "
"skipping option.\n", file_name, line, opt_name);
need_correction = 1;
}
if (in_brackets) {
if (*ptr != ')') {
Handle_err}
else
ptr++;
}
} while (*ptr == ',' && ptr++);
Skip_blanks(ptr);
return ptr;
}
char *
get_time(char *ptr, time_t * time, int zero_allowed)
/* convert time read in string in time_t format */
{
time_t sum;
*time = 0;
while ((*ptr != ' ') && (*ptr != '\t') && (*ptr != '\0') && (*ptr != ')')) {
sum = 0;
while (isdigit((int)*ptr)) {
sum *= 10;
sum += *ptr - 48;
ptr++;
}
/* interpret multipliers */
switch (*ptr) {
case 'm': /* months */
sum *= 4;
case 'w': /* weeks */
sum *= 7;
case 'd': /* days */
sum *= 24;
case 'h': /* hours */
sum *= 3600;
case 's': /* seconds */
ptr++;
break;
case ' ':
case '\t':
case ')':
sum *= 60; /* minutes */
break;
default:
need_correction = 1;
return NULL;
}
*time += sum;
}
Skip_blanks(ptr);
if (*time == 0 && !zero_allowed) {
need_correction = 1;
return NULL;
}
else
return ptr;
}
char *
check_username(char *ptr, cf_t * cf, cl_t * cl)
/* check ptr to see if the first word is a username, returns new ptr */
{
short int indx = 0;
char username[USER_NAME_LEN];
struct passwd *userpwent;
/* check to see if next word is a username */
/* we don't allow quotes, to be able to distinguish a user name from
* a command line (where quotes are allowed) */
while (isalnum((int)ptr[indx]) || ptr[indx] == '-' || ptr[indx] == '_')
indx++;
if (indx >= USER_NAME_LEN)
indx = USER_NAME_LEN - 1;
strncpy(username, ptr, indx);
username[indx] = '\0';
if ((userpwent = getpwnam(username)) != NULL) {
/* found the user */
ptr = ptr + indx; /* move ptr to the next word */
Skip_blanks(ptr);
if (getuid() != rootuid) {
fprintf(stderr, "must be privileged to run as another user : "
"ignoring\n");
}
else {
Set(cl->cl_runas, username);
if (debug_opt)
fprintf(stderr, " Opt : inline_runas %s\n", username);
}
}
return ptr;
}
char *
read_word(char *ptr, char *buf, size_t buf_size)
/* copy a word to buf with a max_size of buf_size and return a pointer
* to the next char after the word */
{
int i = 0;
bzero(buf, buf_size);
while (isalnum((int)*ptr) && i < buf_size)
buf[i++] = *ptr++;
return ptr;
}
int
read_shortcut(char *ptr, cf_t * cf)
/* try to read a shortcut entry, and if it is one then append a line to cf
* Return 1 if that was a shortcut entry. If it wasn't, return 0 and make sure
* ptr is back to its orig value. */
{
cl_t *cl = NULL;
char shortcut[20];
char *ptr_orig = ptr;
cl = dups_cl(&default_line);
/* skip the @ */
ptr++;
ptr = read_word(ptr, shortcut, sizeof(shortcut));
/* time&date by default -- we'll switch to freq if @reboot */
set_td(cl->cl_option);
cl->cl_remain = cl->cl_runfreq; /* FIXME: necessary?? */
if (strcmp(shortcut, "reboot") == 0) {
set_freq(cl->cl_option);
set_runatreboot(cl->cl_option);
set_runonce(cl->cl_option);
clear_volatile(cl->cl_option);
cl->cl_runfreq = 0;
cl->cl_first = 0;
/* the job will not be rescheduled after the first execution (flag is_hasrun),
* we set timefreq to LONG_MAX just in case */
cl->cl_timefreq = LONG_MAX;
if (debug_opt)
fprintf(stderr, " Shc : @reboot\n");
}
if (strcmp(shortcut, "resume") == 0) {
set_freq(cl->cl_option);
set_runatresume(cl->cl_option);
set_runonce(cl->cl_option);
clear_volatile(cl->cl_option);
cl->cl_runfreq = 0;
cl->cl_first = 0;
/* the job will not be rescheduled after the first execution (flag is_hasrun),
* we set timefreq to LONG_MAX just in case */
cl->cl_timefreq = LONG_MAX;
if (debug_opt)
fprintf(stderr, " Shc : @resume\n");
}
else if (strcmp(shortcut, "yearly") == 0
|| strcmp(shortcut, "annually") == 0) {
bit_set(cl->cl_mins, 0);
bit_set(cl->cl_hrs, 0);
bit_set(cl->cl_days, 1);
bit_set(cl->cl_mons, 0);
bit_nset(cl->cl_dow, 0, 7);
if (debug_opt)
fprintf(stderr, " Shc : @yearly\n");
}
else if (strcmp(shortcut, "monthly") == 0) {
bit_set(cl->cl_mins, 0);
bit_set(cl->cl_hrs, 0);
bit_set(cl->cl_days, 1);
bit_nset(cl->cl_mons, 0, 11);
bit_nset(cl->cl_dow, 0, 7);
if (debug_opt)
fprintf(stderr, " Shc : @monthly\n");
}
else if (strcmp(shortcut, "weekly") == 0) {
bit_set(cl->cl_mins, 0);
bit_set(cl->cl_hrs, 0);
bit_nset(cl->cl_days, 0, 31);
bit_nset(cl->cl_mons, 0, 11);
bit_set(cl->cl_dow, 0);
bit_set(cl->cl_dow, 7); /* 0 and 7 are both sunday */
if (debug_opt)
fprintf(stderr, " Shc : @weekly\n");
}
else if (strcmp(shortcut, "daily") == 0
|| strcmp(shortcut, "midnight") == 0) {
bit_set(cl->cl_mins, 0);
bit_set(cl->cl_hrs, 0);
bit_nset(cl->cl_days, 0, 31);
bit_nset(cl->cl_mons, 0, 11);
bit_nset(cl->cl_dow, 0, 7);
if (debug_opt)
fprintf(stderr, " Shc : @daily\n");
}
else if (strcmp(shortcut, "hourly") == 0) {
bit_set(cl->cl_mins, 0);
bit_nset(cl->cl_hrs, 0, 23);
bit_nset(cl->cl_days, 0, 31);
bit_nset(cl->cl_mons, 0, 11);
bit_nset(cl->cl_dow, 0, 7);
if (debug_opt)
fprintf(stderr, " Shc : @hourly\n");
}
else {
/* this is not a shortcut line but a normal @-line: */
ptr = ptr_orig;
return 0;
}
/* The next char must be a space (no other option allowed when using
* a shortcut: if the user wants to use options, they should use the
* native fcron lines */
if (!isspace((int)*ptr)) {
fprintf(stderr, "%s:%d: No space after shortcut: skipping line.\n",
file_name, line);
goto exiterr;
}
/* skip spaces before the username / shell command */
while (isspace((int)*ptr))
ptr++;
/* check for inline runas */
ptr = check_username(ptr, cf, cl);
/* get cl_shell field ( remove trailing blanks ) */
if ((cl->cl_shell = get_string(ptr)) == NULL) {
fprintf(stderr, "%s:%d: Mismatched quotes: skipping line.\n",
file_name, line);
goto exiterr;
}
if (strcmp(cl->cl_shell, "\0") == 0) {
fprintf(stderr, "%s:%d: No shell command: skipping line.\n",
file_name, line);
Free_safe(cl->cl_shell);
goto exiterr;
}
#ifndef USE_SENDMAIL
clear_mail(cl->cl_option);
clear_mailzerolength(cl->cl_option);
#endif
cl->cl_next = cf->cf_line_base;
cf->cf_line_base = cl;
if (debug_opt)
fprintf(stderr, " Cmd \"%s\" (shortcut)\n", cl->cl_shell);
return 1;
exiterr:
Free_safe(cl);
need_correction = 1;
return 1;
}
void
read_freq(char *ptr, cf_t * cf)
/* read a freq entry, and append a line to cf */
{
cl_t *cl = NULL;
cl = dups_cl(&default_line);
cl->cl_first = -1; /* 0 is a valid value, so we have to use -1 to detect unset */
/* skip the @ */
ptr++;
/* get the time before first execution or the options */
if (isdigit((int)*ptr)) {
if ((ptr = get_time(ptr, &(cl->cl_first), 1)) == NULL) {
fprintf(stderr, "%s:%d: Error while reading first delay:"
" skipping line.\n", file_name, line);
goto exiterr;
}
Skip_blanks(ptr);
}
else if (isalnum((int)*ptr)) {
if ((ptr = read_opt(ptr, cl)) == NULL)
goto exiterr;
}
else
Skip_blanks(ptr);
/* we set this here, because it may be unset by read_opt (reset option) */
cl->cl_runfreq = 0;
set_freq(cl->cl_option);
/* then cl_timefreq */
if ((ptr = get_time(ptr, (time_t *) & (cl->cl_timefreq), 0)) == NULL
|| cl->cl_timefreq < 1) {
fprintf(stderr,
"%s:%d: Error while reading frequency %s: skipping line.\n",
file_name, line,
(cl->cl_timefreq < 1) ? "(lower than 1s) " : "");
goto exiterr;
}
if (cl->cl_timefreq == 0) {
fprintf(stderr, "%s:%d: no freq specified: skipping line.\n",
file_name, line);
goto exiterr;
}
if (cl->cl_first == -1)
/* time before first execution was not specified explicitely */
cl->cl_first = cl->cl_timefreq;
/* check for inline runas */
ptr = check_username(ptr, cf, cl);
/* get cl_shell field ( remove trailing blanks ) */
if ((cl->cl_shell = get_string(ptr)) == NULL) {
fprintf(stderr, "%s:%d: Mismatched quotes: skipping line.\n",
file_name, line);
goto exiterr;
}
if (strcmp(cl->cl_shell, "\0") == 0) {
fprintf(stderr, "%s:%d: No shell command: skipping line.\n",
file_name, line);
Free_safe(cl->cl_shell);
goto exiterr;
}
#ifndef USE_SENDMAIL
clear_mail(cl->cl_option);
clear_mailzerolength(cl->cl_option);
#endif
cl->cl_next = cf->cf_line_base;
cf->cf_line_base = cl;
if (debug_opt)
fprintf(stderr, " Cmd \"%s\", timefreq %ld, first %ld\n",
cl->cl_shell, cl->cl_timefreq, (long int)cl->cl_first);
return;
exiterr:
free_line(cl);
need_correction = 1;
return;
}
#define R_field(PTR, ARY, MAX, ARYCONST, DESCRP) \
if((PTR = read_field(PTR, ARY, MAX, ARYCONST)) == NULL) { \
if (debug_opt) \
fprintf(stderr, "\n"); \
fprintf(stderr, "%s:%d: Error while reading " DESCRP " field: " \
"skipping line.\n", file_name, line); \
Free_safe(cl); \
return; \
}
void
read_arys(char *ptr, cf_t * cf)
/* read a run freq number plus a normal fcron line */
{
cl_t *cl = NULL;
int i = 0;
cl = dups_cl(&default_line);
/* set cl_remain if not specified */
if (*ptr == '&') {
ptr++;
if (isdigit((int)*ptr)) {
if ((ptr = get_num(ptr, &i, USHRT_MAX, 0, NULL)) == NULL) {
fprintf(stderr, "%s:%d: Error while reading runfreq:"
" skipping line.\n", file_name, line);
goto exiterr;
}
else {
if (i <= 1) {
fprintf(stderr, "%s:%d: runfreq must be 2 or more :"
" skipping line.\n", file_name, line);
goto exiterr;
}
cl->cl_runfreq = (unsigned short)i;
}
}
else if (isalnum((int)*ptr))
if ((ptr = read_opt(ptr, cl)) == NULL) {
goto exiterr;
}
Skip_blanks(ptr);
}
cl->cl_remain = cl->cl_runfreq;
/* we set this here, because it may be unset by read_opt (reset option) */
set_td(cl->cl_option);
if (debug_opt)
fprintf(stderr, " ");
/* get the fields (check for errors) */
R_field(ptr, cl->cl_mins, 59, NULL, "minutes");
R_field(ptr, cl->cl_hrs, 23, NULL, "hours");
R_field(ptr, cl->cl_days, 31, NULL, "days");
/* month are defined by user from 1 to 12 : max is 12 */
R_field(ptr, cl->cl_mons, 12, mons_ary, "months");
R_field(ptr, cl->cl_dow, 7, dows_ary, "days of week");
if (debug_opt)
/* if debug_opt is set, we print informations in read_field function,
* but no end line : we print it here */
fprintf(stderr, " remain %d\n", cl->cl_remain);
/* check for inline runas */
ptr = check_username(ptr, cf, cl);
/* get the shell command (remove trailing blanks) */
if ((cl->cl_shell = get_string(ptr)) == NULL) {
fprintf(stderr, "%s:%d: Mismatched quotes: skipping line.\n",
file_name, line);
goto exiterr;
}
if (strcmp(cl->cl_shell, "\0") == 0) {
fprintf(stderr, "%s:%d: No shell command: skipping line.\n",
file_name, line);
Free_safe(cl->cl_shell);
goto exiterr;
}
#ifndef USE_SENDMAIL
clear_mail(cl->cl_option);
clear_mailzerolength(cl->cl_option);
#endif
cl->cl_next = cf->cf_line_base;
cf->cf_line_base = cl;
if (debug_opt)
fprintf(stderr, " Cmd \"%s\"\n", cl->cl_shell);
return;
exiterr:
need_correction = 1;
free_line(cl);
return;
}
void
read_period(char *ptr, cf_t * cf)
/* read a line to run periodically (i.e. once a day, once a week, etc) */
{
cl_t *cl = NULL;
short int remain = 8;
cl = dups_cl(&default_line);
/* skip the % */
ptr++;
/* a runfreq set to 1 means : this is a periodical line
* (runfreq cannot be changed by read_opt() if already set to 1) */
cl->cl_remain = cl->cl_runfreq = 1;
/* set cl_remain if not specified */
if ((ptr = read_opt(ptr, cl)) == NULL) {
goto exiterr;
}
Skip_blanks(ptr);
/* we set this here, because it may be unset by read_opt (reset option) */
set_td(cl->cl_option);
if (debug_opt)
fprintf(stderr, " ");
if (is_freq_periodically(cl->cl_option)) {
if (is_freq_mins(cl->cl_option))
remain = 0;
else if (is_freq_hrs(cl->cl_option))
remain = 1;
else if (is_freq_days(cl->cl_option))
remain = 2;
else if (is_freq_mons(cl->cl_option))
remain = 3;
else if (is_freq_dow(cl->cl_option))
remain = 2;
}
/* get the fields (check for errors) */
if (remain-- > 0) {
R_field(ptr, cl->cl_mins, 59, NULL, "minutes")}
else
bit_nset(cl->cl_mins, 0, 59);
if (remain-- > 0) {
R_field(ptr, cl->cl_hrs, 23, NULL, "hours")}
else
bit_nset(cl->cl_hrs, 0, 23);
if (remain-- > 0) {
R_field(ptr, cl->cl_days, 31, NULL, "days")}
else
bit_nset(cl->cl_days, 1, 32);
/* month are defined by user from 1 to 12 : max is 12 */
if (remain-- > 0) {
R_field(ptr, cl->cl_mons, 12, mons_ary, "months")}
else
bit_nset(cl->cl_mons, 0, 11);
if (remain-- > 0) {
R_field(ptr, cl->cl_dow, 7, dows_ary, "days of week")}
else
bit_nset(cl->cl_dow, 0, 7);
if (debug_opt)
/* if debug_opt is set, we print informations in read_field function,
* but no end line : we print it here */
fprintf(stderr, " remain %d\n", cl->cl_remain);
/* check for inline runas */
ptr = check_username(ptr, cf, cl);
/* get the shell command (remove trailing blanks) */
if ((cl->cl_shell = get_string(ptr)) == NULL) {
fprintf(stderr, "%s:%d: Mismatched quotes: skipping line.\n",
file_name, line);
goto exiterr;
}
if (strcmp(cl->cl_shell, "\0") == 0) {
fprintf(stderr, "%s:%d: No shell command: skipping line.\n",
file_name, line);
Free_safe(cl->cl_shell);
goto exiterr;
}
else if (cl->cl_shell[0] == '*' || isdigit((int)cl->cl_shell[0]))
fprintf(stderr, "%s:%d: Warning : shell command beginning by '%c'.\n",
file_name, line, cl->cl_shell[0]);
/* check for non matching if option runfreq is set to 1 */
if (!is_freq_periodically(cl->cl_option)) {
const size_t s_mins = 60, s_hrs = 24;
const size_t s_days = 32, s_mons = 12;
const size_t s_dow = 8;
int j = 0;
if (!is_freq_mins(cl->cl_option)) {
bit_ffc(cl->cl_mins, s_mins, &j);
if (j != -1 && j < s_mins)
goto ok;
}
if (!is_freq_hrs(cl->cl_option)) {
bit_ffc(cl->cl_hrs, s_hrs, &j);
if (j != -1 && j < s_hrs)
goto ok;
}
if (!is_freq_days(cl->cl_option)) {
bit_ffc(cl->cl_days, s_days, &j);
if (j != -1 && j < s_days) {
if (is_dayand(cl->cl_option))
goto ok;
else {
if (!is_freq_dow(cl->cl_option)) {
bit_ffc(cl->cl_dow, s_dow, &j);
if (j != -1 && j < s_dow)
goto ok;
}
}
}
}
if (!is_freq_mons(cl->cl_option)) {
bit_ffc(cl->cl_mons, s_mons, &j);
if (j != -1 && j < s_mons)
goto ok;
}
if (!is_freq_dow(cl->cl_option)) {
bit_ffc(cl->cl_dow, s_dow, &j);
if (j != -1 && j < s_dow && is_dayand(cl->cl_option))
goto ok;
}
fprintf(stderr, "%s:%d: periodical line with no intervals: "
"skipping line.\n", file_name, line);
goto exiterr;
}
ok:
#ifndef USE_SENDMAIL
clear_mail(cl->cl_option);
clear_mailzerolength(cl->cl_option);
#endif
cl->cl_next = cf->cf_line_base;
cf->cf_line_base = cl;
if (debug_opt)
fprintf(stderr, " Cmd \"%s\"\n", cl->cl_shell);
return;
exiterr:
need_correction = 1;
free_line(cl);
return;
}
char *
get_num(char *ptr, int *num, int max, short int decimal, const char **names)
/* read a string's number and return it under int format.
* Also check if that number is less than max */
{
int i = 0;
*num = 0;
if (isalpha((int)*ptr)) {
if (names == NULL) {
need_correction = 1;
return NULL;
}
/* set string to lower case */
for (i = 0; i < strlen(names[0]); i++)
*(ptr + i) = tolower(*(ptr + i));
for (i = 0; names[i]; ++i)
if (strncmp(ptr, names[i], strlen(names[i])) == 0) {
*num = i;
ptr += strlen(names[i]);
return ptr;
break;
}
/* string is not in name list */
need_correction = 1;
return NULL;
}
else {
while (isdigit((int)*ptr) || *ptr == '.') {
if (*ptr == '.' && ptr++ && i++ > 0)
return NULL;
if (i > 0 && --decimal < 0) {
/* the decimal number is exceeded : we round off,
* skip the other decimals and return */
if (*ptr >= '5')
*num += 1;
while (isdigit((int)*(++ptr))) ;
ptr--;
}
else {
*num *= 10;
*num += *ptr - 48;
}
if (*num > max) {
need_correction = 1;
return NULL;
}
ptr++;
}
if (decimal > 0)
*num *= 10 * decimal;
}
return ptr;
}
char *
read_field(char *ptr, bitstr_t * ary, int max, const char **names)
/* read a field like "2,5-8,10-20/2,21-30~25" and fill ary */
{
int start = 0;
int stop = 0;
int step = 0;
int rm = 0;
int i = 0;
while ((*ptr != ' ') && (*ptr != '\t') && (*ptr != '\0')) {
start = stop = step = 0;
/* there may be a "," */
if (*ptr == ',')
ptr++;
if (*ptr == '*') {
/* we have to fill everything (may be modified by a step ) */
start = 0;
/* user set month from 1 to 12, but we manage it internally
* as a number from 0 to 11 */
stop = (max == 12) ? 11 : max;
ptr++;
}
else {
ptr = get_num(ptr, &start, max, 0, names);
if (ptr == NULL)
return NULL;
if (max == 12)
/* this number is part of the month field.
* user set it from 1 to 12, but we manage it internally
* as a number from 0 to 11 : we remove 1 to start */
start -= 1;
if (*ptr == ',' || *ptr == ' ' || *ptr == '\t') {
/* this is a single number : set up array and continue */
if (debug_opt)
fprintf(stderr, " %d", start);
bit_set(ary, start);
continue;
}
/* check for a dash */
else if (*ptr == '-') {
ptr++;
ptr = get_num(ptr, &stop, max, 0, names);
if (ptr == NULL)
/* we reached the end of the string to parse */
return NULL;
if (max == 12)
/* this number is part of the month field.
* user set it from 1 to 12, but we manage it internally
* as a number from 0 to 11 : we remove 1 to stop */
stop -= 1;
}
else {
/* syntax error */
need_correction = 1;
return NULL;
}
}
/* check for step size */
if (*ptr == '/') {
ptr++;
if ((ptr = get_num(ptr, &step, max, 0, names)) == NULL || step == 0)
return NULL;
}
else
/* step undefined : default is 0 */
step = 1;
/* fill array */
if (debug_opt)
fprintf(stderr, " %d-%d/%d", start, stop, step);
if (start < stop)
for (i = start; i <= stop; i += step)
bit_set(ary, i);
else {
short int field_max = (max == 12) ? 11 : max;
/* this is a field like (for hours field) "22-3" :
* we should set from 22 to 3 (not from 3 to 22 or nothing :)) ) */
for (i = start; i <= field_max; i += step)
bit_set(ary, i);
for (i -= (field_max + 1); i <= stop; i += step)
bit_set(ary, i);
}
/* finally, remove unwanted values */
while (*ptr == '~') {
ptr++;
rm = 0;
if ((ptr = get_num(ptr, &rm, max, 0, names)) == NULL)
return NULL;
if (max == 12)
/* this number is part of the month field.
* user set it from 1 to 12, but we manage it internally
* as a number from 0 to 11 : we remove 1 to rm */
rm -= 1;
if (debug_opt)
fprintf(stderr, " ~%d", rm);
bit_clear(ary, rm);
/* if we remove one value of Sunday, remove the other */
if (max == 7 && rm == 0) {
bit_clear(ary, 7);
if (debug_opt)
fprintf(stderr, " ~%d", 7);
}
else if (max == 7 && rm == 7) {
bit_clear(ary, 0);
if (debug_opt)
fprintf(stderr, " ~%d", 0);
}
}
}
/* Sunday is both 0 and 7 : if one is set, set the other */
if (max == 7) {
if (bit_test(ary, 0))
bit_set(ary, 7);
else if (bit_test(ary, 7))
bit_set(ary, 0);
}
Skip_blanks(ptr);
if (debug_opt)
fprintf(stderr, " #");
return ptr;
}
void
delete_file(const char *user_name)
/* free a file if user_name is not null
* otherwise free all files */
{
cf_t *file = NULL;
cf_t *prev_file = NULL;
cl_t *line = NULL;
cl_t *cur_line = NULL;
file = file_base;
while (file != NULL) {
if (strcmp(user_name, file->cf_user) == 0) {
/* free lines */
cur_line = file->cf_line_base;
while ((line = cur_line) != NULL) {
cur_line = line->cl_next;
free_line(line);
}
break;
}
else {
prev_file = file;
file = file->cf_next;
}
}
if (file == NULL)
/* file not in list */
return;
/* remove file from list */
if (prev_file == NULL)
file_base = file->cf_next;
else
prev_file->cf_next = file->cf_next;
/* free env variables */
env_list_destroy(file->cf_env_list);
/* finally free file itself */
Free_safe(file->cf_user);
Free_safe(file);
}
int
save_file(char *path)
/* Store the informations relatives to the executions
* of tasks at a defined frequency of system's running time */
{
cf_t *file = NULL;
if (debug_opt)
fprintf(stderr, "Saving ...\n");
for (file = file_base; file; file = file->cf_next) {
/* save_file() is run under user's rights.
* If fcrontab is run by root for a normal user, we must change the file's
* ownership to this user, in order to make fcron check the runas fields.
* (a malicious user could put a runas(root) and wait for the fcrontab to be
* installed by root) */
#ifdef USE_SETE_ID
if (save_file_safe(file, path, "fcrontab", asuid, fcrontab_gid, 0) ==
ERR)
return ERR;
#else
if (save_file_safe
(file, path, "fcrontab", fcrontab_uid, fcrontab_gid, 0) == ERR)
return ERR;
#endif
}
return OK;
}