static void full_write2_str(const char *str)
{
xwrite_str(STDERR_FILENO, str);
}
/* Open file and write string str to it, close file.
* Die on any open or write error. */
void FAST_FUNC xopen_xwrite_close(const char* file, const char* str)
{
int fd = xopen(file, O_WRONLY);
xwrite_str(fd, str);
close(fd);
}
static int sysctl_act_on_setting(char *setting)
{
int fd, retval = EXIT_SUCCESS;
char *cptr, *outname;
char *value = value; /* for compiler */
outname = xstrdup(setting);
cptr = outname;
while (*cptr) {
if (*cptr == '/')
*cptr = '.';
cptr++;
}
if (option_mask32 & FLAG_WRITE) {
cptr = strchr(setting, '=');
if (cptr == NULL) {
bb_error_msg("error: '%s' must be of the form name=value",
outname);
retval = EXIT_FAILURE;
goto end;
}
value = cptr + 1; /* point to the value in name=value */
if (setting == cptr || !*value) {
bb_error_msg("error: malformed setting '%s'", outname);
retval = EXIT_FAILURE;
goto end;
}
*cptr = '\0';
outname[cptr - setting] = '\0';
/* procps 3.2.7 actually uses these flags */
fd = open(setting, O_WRONLY|O_CREAT|O_TRUNC, 0666);
} else {
fd = open(setting, O_RDONLY);
}
if (fd < 0) {
switch (errno) {
case ENOENT:
if (option_mask32 & FLAG_SHOW_KEY_ERRORS)
bb_error_msg("error: '%s' is an unknown key", outname);
break;
default:
bb_perror_msg("error %sing key '%s'",
option_mask32 & FLAG_WRITE ?
"sett" : "read",
outname);
break;
}
retval = EXIT_FAILURE;
goto end;
}
if (option_mask32 & FLAG_WRITE) {
//TODO: procps 3.2.7 writes "value\n", note trailing "\n"
xwrite_str(fd, value);
close(fd);
if (!(option_mask32 & FLAG_QUIET)) {
if (option_mask32 & FLAG_SHOW_KEYS)
printf("%s = ", outname);
puts(value);
}
} else {
char c;
value = cptr = xmalloc_read(fd, NULL);
close(fd);
if (value == NULL) {
bb_perror_msg("error reading key '%s'", outname);
goto end;
}
/* dev.cdrom.info and sunrpc.transports, for example,
* are multi-line. Try "sysctl sunrpc.transports"
*/
while ((c = *cptr) != '\0') {
if (option_mask32 & FLAG_SHOW_KEYS)
printf("%s = ", outname);
while (1) {
fputc(c, stdout);
cptr++;
if (c == '\n')
break;
c = *cptr;
if (c == '\0')
break;
}
}
free(value);
}
end:
free(outname);
return retval;
}
