#include #include int touch(int, char *); ulong now; void usage(void) { fprint(2, "usage: touch [-c] [-t time] files\n"); exits("usage"); } void main(int argc, char **argv) { int nocreate = 0; int status = 0; now = time(0); ARGBEGIN{ case 't': now = strtoul(EARGF(usage()), 0, 0); break; case 'c': nocreate = 1; break; default: usage(); }ARGEND if(!*argv) usage(); while(*argv) status += touch(nocreate, *argv++); if(status) exits("touch"); exits(0); } touch(int nocreate, char *name) { Dir stbuff; int fd; nulldir(&stbuff); stbuff.mtime = now; if(dirwstat(name, &stbuff) >= 0) return 0; if(nocreate){ fprint(2, "touch: %s: cannot wstat: %r\n", name); return 1; } if ((fd = create(name, OREAD|OEXCL, 0666)) < 0) { fprint(2, "touch: %s: cannot create: %r\n", name); return 1; } dirfwstat(fd, &stbuff); close(fd); return 0; }