Promote makedevs to other.

1 files changed, 131 insertions, 0 deletions

diff --git a/toys/other/makedevs.c b/toys/other/makedevs.c
new file mode 100644
index 00000000..f6e7ece9
--- /dev/null
+++ b/toys/other/makedevs.c
@@ -0,0 +1,131 @@
+/* makedevs.c - Make ranges of device files.
+ *
+ * Copyright 2014 Bilal Qureshi <bilal.jmi@gmail.com>
+ * Copyright 2014 Kyungwan Han <asura321@gmail.com>
+ *
+ * No Standard
+ 
+USE_MAKEDEVS(NEWTOY(makedevs, "<1>1d:", TOYFLAG_USR|TOYFLAG_BIN))
+
+config MAKEDEVS
+  bool "makedevs"
+  default y
+  help
+    usage: makedevs [-d device_table] rootdir
+
+    Create a range of special files as specified in a device table.
+
+    -d	file containing device table (default reads from stdin)
+
+    Each line of of the device table has the fields:
+    <name> <type> <mode> <uid> <gid> <major> <minor> <start> <increment> <count>
+    Where name is the file name, and type is one of the following:
+
+    b	Block device
+    c	Character device
+    d	Directory
+    f	Regular file
+    p	Named pipe (fifo)
+
+    Other fields specify permissions, user and group id owning the file,
+    and additional fields for device special files. Use '-' for blank entries,
+    unspecified fields are treated as '-'.
+*/
+
+#define FOR_makedevs
+#include "toys.h"
+
+GLOBALS(
+  char *fname;
+)
+
+void makedevs_main()
+{
+  int value, fd = 0, line_no, i;
+  char *line = NULL;
+
+  // Open file and chdir, verbosely
+  xprintf("rootdir = %s\n", *toys.optargs);
+  if (toys.optflags & FLAG_d && strcmp(TT.fname, "-")) {
+    fd = xopen(TT.fname, O_RDONLY);
+    xprintf("table = %s\n", TT.fname);
+  } else xprintf("table = <stdin>\n");
+  xchdir(*toys.optargs);
+
+  for (line_no = 0; (line = get_line(fd)); free(line)) {
+    char type=0, user[64], group[64], *node, *ptr = line;
+    unsigned int mode = 0755, major = 0, minor = 0, cnt = 0, incr = 0, 
+                 st_val = 0;
+    uid_t uid;
+    gid_t gid;
+    struct stat st;
+
+    line_no++;
+    while (isspace(*ptr)) ptr++;
+    if (!*ptr || *ptr == '#') continue;
+    node = ptr;
+
+    while (*ptr && !isspace(*ptr)) ptr++;
+    if (*ptr) *(ptr++) = 0;
+    *user = *group = 0;
+    sscanf(ptr, "%c %o %63s %63s %u %u %u %u %u", &type, &mode,
+           user, group, &major, &minor, &st_val, &incr, &cnt);
+
+    // type order here needs to line up with actions[] order.
+    i = stridx("pcbdf", type);
+    if (i == -1) {
+      error_msg("line %d: bad type %c", line_no, type);
+      continue;
+    } else mode |= (mode_t[]){S_IFIFO, S_IFCHR, S_IFBLK, 0, 0}[i];
+
+    if (*user) {
+      struct passwd *usr;
+
+      if (!(usr = getpwnam(user)) && isdigit(*user)) {
+        sscanf(user, "%u", &value);
+        usr = xgetpwuid(value);
+      }
+      if (!usr) error_exit("bad user '%s'", user);
+      uid = usr->pw_uid;
+    } else uid = getuid();
+
+    if (*group) {
+      struct group *grp;
+
+      if (!(grp = getgrnam(group)) && isdigit(*group)) {
+        sscanf (group, "%u", &value);
+        grp = getgrgid(value);
+      }
+      if (!grp) error_exit("bad group '%s'", group);
+      gid = grp->gr_gid;
+    } else gid = getgid();
+
+    while (*node == '/') node++; // using relative path
+
+    for (i = 0; (!cnt && !i) || i < cnt; i++) {
+      if (cnt) {
+        snprintf(toybuf, sizeof(toybuf), "%s%u", node, st_val + i);
+        ptr = toybuf;
+      } else ptr = node;
+
+      if (type == 'd') {
+        if (mkpathat(AT_FDCWD, ptr, mode, 3))  {
+          perror_msg("can't create directory '%s'", ptr);
+          continue;
+        }
+      } else if (type == 'f') {
+        if (stat(ptr, &st) || !S_ISREG(st.st_mode)) {
+          perror_msg("line %d: file '%s' does not exist", line_no, ptr);
+          continue;
+        }
+      } else if (mknod(ptr, mode, makedev(major, minor + i*incr))) {
+        perror_msg("line %d: can't create node '%s'", line_no, ptr);
+        continue;
+      }
+
+      if (chown(ptr, uid, gid) || chmod(ptr, mode)) 
+        perror_msg("line %d: can't chown/chmod '%s'", line_no, ptr);
+    }
+  }
+  xclose(fd);
+}