source: trunk/minix/commands/simple/which.c@ 10

Last change on this file since 10 was 9, checked in by Mattia Monga, 13 years ago

Minix 3.1.2a

File size: 1.5 KB
Line 
1/* which - search paths for executable */
2
3#define DELIMITER ':'
4
5#include <sys/types.h>
6#include <stdlib.h>
7#include <string.h>
8#include <unistd.h>
9#include <stdio.h>
10
11_PROTOTYPE(int main, (int argc, char **argv));
12
13int main(ac, av)
14int ac;
15char **av;
16{
17 char *path, *cp;
18 char buf[400];
19 char prog[400];
20 char patbuf[512];
21 int quit, none;
22 int excode = 0;
23
24 if (ac < 2) {
25 fprintf(stderr, "Usage: %s cmd [cmd, ..]\n", *av);
26 exit(1);
27 }
28 av[ac] = 0;
29 for (av++; *av; av++) {
30
31 quit = 0;
32 none = 1;
33 if ((path = getenv("PATH")) == NULL) {
34 fprintf(stderr, "Null path.\n");
35 exit(0);
36 }
37 strcpy(patbuf, path);
38 path = patbuf;
39 cp = path;
40
41 while (1) {
42 cp = strchr(path, DELIMITER);
43 if (cp == NULL)
44 quit++;
45 else
46 *cp = '\0';
47
48 if (strcmp(path, "") == 0 && quit == 0) {
49 sprintf(buf, "%s./%s", path, *av);
50 } else
51 sprintf(buf, "%s/%s", path, *av);
52
53 /* Fprintf(stderr,"Trying %s, path %s\n",buf,path); */
54
55 path = ++cp;
56
57 if (access(buf, 1) == 0) {
58 printf("%s\n", buf);
59 none = 0;
60 }
61 sprintf(prog, "%s.%s", buf, "prg");
62 if (access(prog, 1) == 0) {
63 printf("%s\n", prog);
64 none = 0;
65 }
66 sprintf(prog, "%s.%s", buf, "ttp");
67 if (access(prog, 1) == 0) {
68 printf("%s\n", prog);
69 none = 0;
70 }
71 sprintf(prog, "%s.%s", buf, "tos");
72 if (access(prog, 1) == 0) {
73 printf("%s\n", prog);
74 none = 0;
75 }
76 if (quit) {
77 if (none) {
78 fprintf(stderr, "No %s in %s\n", *av, getenv("PATH"));
79 excode = 1;
80 }
81 break;
82 }
83 }
84 }
85 return(excode);
86}
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