194 lines
3.9 KiB
C
Executable file
194 lines
3.9 KiB
C
Executable file
/* mkfifo - Make FIFO special files Author: V. Archer */
|
|
|
|
/* Copyright 1991 by Vincent Archer
|
|
* You may freely redistribute this software, in source or binary
|
|
* form, provided that you do not alter this copyright mention in any
|
|
* way.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <stdlib.h>
|
|
#include <sys/stat.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <minix/minlib.h>
|
|
#include <stdio.h>
|
|
|
|
#define USR_MODES (S_ISUID|S_IRWXU)
|
|
#define GRP_MODES (S_ISGID|S_IRWXG)
|
|
#define EXE_MODES (S_IXUSR|S_IXGRP|S_IXOTH)
|
|
#ifdef S_ISVTX
|
|
#define ALL_MODES (USR_MODES|GRP_MODES|S_IRWXO|S_ISVTX)
|
|
#else
|
|
#define ALL_MODES (USR_MODES|GRP_MODES|S_IRWXO)
|
|
#endif
|
|
#define DEFAULT_MODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
|
|
|
|
|
|
/* Global u_mask needed in changemode.h */
|
|
mode_t u_mask;
|
|
|
|
_PROTOTYPE(int main, (int argc, char **argv));
|
|
_PROTOTYPE(mode_t parsemode, (char *symbolic, mode_t oldmode));
|
|
_PROTOTYPE(void usage, (void));
|
|
|
|
/* Parse a P1003.2 4.7.7-conformant symbolic mode. */
|
|
mode_t parsemode(char *symbolic, mode_t oldmode)
|
|
{
|
|
mode_t who, mask, newmode, tmpmask;
|
|
char action;
|
|
|
|
newmode = oldmode & ALL_MODES;
|
|
while (*symbolic) {
|
|
who = 0;
|
|
for (; *symbolic; symbolic++) {
|
|
if (*symbolic == 'a') {
|
|
who |= ALL_MODES;
|
|
continue;
|
|
}
|
|
if (*symbolic == 'u') {
|
|
who |= USR_MODES;
|
|
continue;
|
|
}
|
|
if (*symbolic == 'g') {
|
|
who |= GRP_MODES;
|
|
continue;
|
|
}
|
|
if (*symbolic == 'o') {
|
|
who |= S_IRWXO;
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
if (!*symbolic || *symbolic == ',') usage();
|
|
while (*symbolic) {
|
|
if (*symbolic == ',') break;
|
|
switch (*symbolic) {
|
|
default:
|
|
usage();
|
|
case '+':
|
|
case '-':
|
|
case '=': action = *symbolic++;
|
|
}
|
|
mask = 0;
|
|
for (; *symbolic; symbolic++) {
|
|
if (*symbolic == 'u') {
|
|
tmpmask = newmode & S_IRWXU;
|
|
mask |= tmpmask | (tmpmask << 3) | (tmpmask << 6);
|
|
symbolic++;
|
|
break;
|
|
}
|
|
if (*symbolic == 'g') {
|
|
tmpmask = newmode & S_IRWXG;
|
|
mask |= tmpmask | (tmpmask >> 3) | (tmpmask << 3);
|
|
symbolic++;
|
|
break;
|
|
}
|
|
if (*symbolic == 'o') {
|
|
tmpmask = newmode & S_IRWXO;
|
|
mask |= tmpmask | (tmpmask >> 3) | (tmpmask >> 6);
|
|
symbolic++;
|
|
break;
|
|
}
|
|
if (*symbolic == 'r') {
|
|
mask |= S_IRUSR | S_IRGRP | S_IROTH;
|
|
continue;
|
|
}
|
|
if (*symbolic == 'w') {
|
|
mask |= S_IWUSR | S_IWGRP | S_IWOTH;
|
|
continue;
|
|
}
|
|
if (*symbolic == 'x') {
|
|
mask |= EXE_MODES;
|
|
continue;
|
|
}
|
|
if (*symbolic == 's') {
|
|
mask |= S_ISUID | S_ISGID;
|
|
continue;
|
|
}
|
|
if (*symbolic == 'X') {
|
|
if (S_ISDIR(oldmode) || (oldmode & EXE_MODES))
|
|
mask |= EXE_MODES;
|
|
continue;
|
|
}
|
|
#ifdef S_ISVTX
|
|
if (*symbolic == 't') {
|
|
mask |= S_ISVTX;
|
|
who |= S_ISVTX;
|
|
continue;
|
|
}
|
|
#endif
|
|
break;
|
|
}
|
|
switch (action) {
|
|
case '=':
|
|
if (who)
|
|
newmode &= ~who;
|
|
else
|
|
newmode = 0;
|
|
case '+':
|
|
if (who)
|
|
newmode |= who & mask;
|
|
else
|
|
newmode |= mask & (~u_mask);
|
|
break;
|
|
case '-':
|
|
if (who)
|
|
newmode &= ~(who & mask);
|
|
else
|
|
newmode &= ~mask | u_mask;
|
|
}
|
|
}
|
|
if (*symbolic) symbolic++;
|
|
}
|
|
return(newmode);
|
|
}
|
|
|
|
|
|
/* Main module. Since only one option (-m mode) is allowed, there's no need
|
|
* to include the whole getopt() stuff.
|
|
*/
|
|
int main(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
int errors = 0;
|
|
char *symbolic;
|
|
|
|
if (argc > 2 && *argv[1] == '-' && strcmp(argv[1], "-m") != 0) usage();
|
|
argc--;
|
|
argv++;
|
|
if (argc && strncmp(*argv, "-m", (size_t) 2) == 0) {
|
|
argc--;
|
|
if ((argv[0])[2])
|
|
symbolic = (*argv++) + 2;
|
|
else {
|
|
if (!argc--) usage();
|
|
argv++;
|
|
symbolic = *argv++;
|
|
}
|
|
u_mask = umask(0);
|
|
umask(u_mask);
|
|
} else
|
|
symbolic = (char *) 0;
|
|
|
|
if (!argc) usage();
|
|
for (; argc--; argv++)
|
|
if (mkfifo(*argv, DEFAULT_MODE)) {
|
|
perror(*argv);
|
|
errors = 1;
|
|
} else if (symbolic && chmod(*argv, parsemode(symbolic, DEFAULT_MODE))) {
|
|
unlink(*argv);
|
|
perror(*argv);
|
|
errors = 1;
|
|
}
|
|
return(errors);
|
|
}
|
|
|
|
|
|
/* Posix command prototype. */
|
|
void usage()
|
|
{
|
|
std_err("Usage: mkfifo [-m mode] file...\n");
|
|
exit(1);
|
|
}
|