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glibc/manual/examples/subopt.c
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#include <stdio.h> | |
#include <stdlib.h> | |
int do_all; | |
const char *type; | |
int read_size; | |
int write_size; | |
int read_only; | |
enum | |
{ | |
RO_OPTION = 0, | |
RW_OPTION, | |
READ_SIZE_OPTION, | |
WRITE_SIZE_OPTION | |
}; | |
const char *mount_opts[] = | |
{ | |
[RO_OPTION] = "ro", | |
[RW_OPTION] = "rw", | |
[READ_SIZE_OPTION] = "rsize", | |
[WRITE_SIZE_OPTION] = "wsize" | |
}; | |
int | |
main (int argc, char *argv[]) | |
{ | |
char *subopts, *value; | |
int opt; | |
while ((opt = getopt (argc, argv, "at:o:")) != -1) | |
switch (opt) | |
{ | |
case 'a': | |
do_all = 1; | |
break; | |
case 't': | |
type = optarg; | |
break; | |
case 'o': | |
subopts = optarg; | |
while (*subopts != '\0') | |
switch (getsubopt (&subopts, mount_opts, &value)) | |
{ | |
case RO_OPTION: | |
read_only = 1; | |
break; | |
case RW_OPTION: | |
read_only = 0; | |
break; | |
case READ_SIZE_OPTION: | |
if (value == NULL) | |
abort (); | |
read_size = atoi (value); | |
break; | |
case WRITE_SIZE_OPTION: | |
if (value == NULL) | |
abort (); | |
write_size = atoi (value); | |
break; | |
default: | |
/* Unknown suboption. */ | |
printf ("Unknown suboption `%s'\n", value); | |
break; | |
} | |
break; | |
default: | |
abort (); | |
} | |
/* Do the real work. */ | |
return 0; | |
} |