81 lines
1.2 KiB
C
81 lines
1.2 KiB
C
#include <sys/stat.h>
|
|
|
|
#include <limits.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include "arg.h"
|
|
#include "util.h"
|
|
|
|
static int aflag;
|
|
|
|
static int
|
|
which(const char *path, const char *name)
|
|
{
|
|
char file[PATH_MAX], *p, *s, *ptr;
|
|
size_t len;
|
|
struct stat st;
|
|
int found = 0;
|
|
|
|
p = ptr = estrdup(path);
|
|
for (s = p; (s = strsep(&p, ":")); ) {
|
|
if (!s[0])
|
|
s = ".";
|
|
len = strlen(s);
|
|
|
|
if (snprintf(file, sizeof(file), "%s%s%s",
|
|
s,
|
|
len > 0 && s[len - 1] != '/' ? "/" : "",
|
|
name) >= sizeof(file))
|
|
eprintf("path too long\n");
|
|
|
|
if (stat(file, &st) == 0 && S_ISREG(st.st_mode) &&
|
|
access(file, X_OK) == 0) {
|
|
found = 1;
|
|
puts(file);
|
|
if (!aflag)
|
|
break;
|
|
}
|
|
}
|
|
free(ptr);
|
|
|
|
return found;
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
eprintf("usage: %s [-a] name...\n", argv0);
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
char *path;
|
|
int i, found;
|
|
|
|
ARGBEGIN {
|
|
case 'a':
|
|
aflag = 1;
|
|
break;
|
|
default:
|
|
usage();
|
|
} ARGEND;
|
|
|
|
if (!argc)
|
|
usage();
|
|
|
|
if (!(path = getenv("PATH")))
|
|
eprintf("$PATH not set\n");
|
|
|
|
for (i = 0, found = 0; i < argc; i++) {
|
|
if (which(path, argv[i]))
|
|
found++;
|
|
else
|
|
weprintf("%s: Command not found.\n", argv[i]);
|
|
}
|
|
return !found ? 2 : found == argc ? 0 : 1;
|
|
}
|