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#include <unistd.h>
#include <dirent.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
void
die(const char *fmt, ...)
{
va_list ap;
fputs("mplay: ", stderr);
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
if (*fmt && fmt[strlen(fmt)-1] == ':') {
perror(NULL);
} else {
fputc('\n', stderr);
}
exit(1);
}
int
main(int argc, char **argv)
{
char *path, *bin;
char *tok, *sep, *end;
char **arg, *fmt;
struct dirent *ent;
DIR *dir;
if (argc < 2) die("mplay [-d] [-f FMT] ... FILE[.FMT]");
path = strdup(getenv("PATH"));
if (!path) die("PATH not set");
fmt = NULL;
for (arg = argv; arg[1]; arg++) {
if (!strcmp(arg[1], "-f")) {
fmt = arg[2];
arg++;
} else {
break;
}
}
arg[0] = argv[0];
if (fmt == NULL) {
fmt = strrchr(argv[argc - 1], '.');
if (!fmt) die("no file extension");
fmt += 1;
}
tok = path;
do {
sep = strchr(tok, ':');
end = sep ? sep : tok + strlen(tok);
*end = '\0';
dir = opendir(tok);
while (dir && (ent = readdir(dir))) {
if (!strncmp(ent->d_name, "mplay.", 6)
&& !strcmp(ent->d_name + 6, fmt)) {
bin = malloc(strlen(tok) + strlen(ent->d_name) + 2);
if (!bin) die("malloc:");
strcpy(bin, tok);
strcat(bin, "/");
strcat(bin, ent->d_name);
closedir(dir);
execv(bin, arg);
die("execv %s:", bin);
}
}
if (dir) closedir(dir);
tok = sep + 1;
} while (sep);
die("no handler");
}
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