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	getconf.c - sbase - suckless unix tools
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	---
	getconf.c (2048B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include <errno.h>
	3 #include <unistd.h>
	4 #include <limits.h>
	5 #include <stdlib.h>
	6 #include <string.h>
	7
	8 #include "util.h"
	9
	10 struct var {
	11 const char *k;
	12 long v;
	13 };
	14
	15 #include "getconf.h"
	16
	17 void
	18 usage(void)
	19 {
	20 eprintf("usage: %s [-v spec] var [path]\n", argv0);
	21 }
	22
	23 int
	24 main(int argc, char *argv[])
	25 {
	26 size_t len;
	27 long res;
	28 int i;
	29 char *str;
	30
	31 ARGBEGIN {
	32 case 'v':
	33 /* ignore */
	34 EARGF(usage());
	35 break;
	36 default:
	37 usage();
	38 break;
	39 } ARGEND
	40
	41 if (argc == 1) {
	42 /* sysconf */
	43 for (i = 0; i < LEN(sysconf_l); i++) {
	44 if (strcmp(argv[0], sysconf_l[i].k))
	45 continue;
	46 errno = 0;
	47 if ((res = sysconf(sysconf_l[i].v)) < 0) {
	48 if (errno)
	49 eprintf("sysconf %ld:", sysconf_…
	50 puts("undefined");
	51 } else {
	52 printf("%ld\n", res);
	53 }
	54 return fshut(stdout, "<stdout>");
	55 }
	56 /* confstr */
	57 for (i = 0; i < LEN(confstr_l); i++) {
	58 if (strcmp(argv[0], confstr_l[i].k))
	59 continue;
	60 errno = 0;
	61 if (!(len = confstr(confstr_l[i].v, NULL, 0))) {
	62 if (errno)
	63 eprintf("confstr %ld:", confstr_…
	64 puts("undefined");
	65 } else {
	66 str = emalloc(len);
	67 errno = 0;
	68 if (!confstr(confstr_l[i].v, str, len)) {
	69 if (errno)
	70 eprintf("confstr %ld:", …
	71 puts("undefined");
	72 } else {
	73 puts(str);
	74 }
	75 free(str);
	76 }
	77 return fshut(stdout, "<stdout>");
	78 }
	79 /* limits */
	80 for (i = 0; i < LEN(limits_l); i++) {
	81 if (strcmp(argv[0], limits_l[i].k))
	82 continue;
	83 printf("%ld\n", limits_l[i].v);
	84 return fshut(stdout, "<stdout>");
	85 }
	86 } else if (argc == 2) {
	87 /* pathconf */
	88 for (i = 0; i < LEN(pathconf_l); i++) {
	89 if (strcmp(argv[0], pathconf_l[i].k))
	90 continue;
	91 errno = 0;
	92 if ((res = pathconf(argv[1], pathconf_l[i].v)) <…
	93 if (errno)
	94 eprintf("pathconf %ld:", pathcon…
	95 puts("undefined");
	96 } else {
	97 printf("%ld\n", res);
	98 }
	99 return fshut(stdout, "<stdout>");
	100 }
	101 } else {
	102 usage();
	103 }
	104
	105 eprintf("invalid variable: %s\n", argv[0]);
	106
	107 return 0;
	108 }