aboutsummaryrefslogtreecommitdiff
path: root/toys
diff options
context:
space:
mode:
Diffstat (limited to 'toys')
-rw-r--r--toys/df.c125
-rw-r--r--toys/toysh.c214
2 files changed, 339 insertions, 0 deletions
diff --git a/toys/df.c b/toys/df.c
new file mode 100644
index 00000000..cbebd157
--- /dev/null
+++ b/toys/df.c
@@ -0,0 +1,125 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * df.c - report free disk space.
+ *
+ * Implemented roughly according to SUSv3:
+ * http://www.opengroup.org/onlinepubs/009695399/utilities/df.html
+ *
+ * usage: df [-k] [-P|-t] [file...]
+ */
+
+#include "toys.h"
+
+static void show_mt(struct mtab_list *mt)
+{
+ int len;
+ long size, used, avail, percent;
+ uint64_t block;
+
+ // Return if it wasn't found (should never happen, but with /etc/mtab...)
+ if (!mt) return;
+
+ // If we have -t, skip other filesystem types
+ if (toy.df.fstype) {
+ struct string_list *sl;
+
+ for (sl = toy.df.fstype; sl; sl = sl->next)
+ if (!strcmp(mt->type, sl->str)) break;
+ if (!sl) return;
+ }
+
+ // If we don't have -a, skip synthetic filesystems
+ if (!(toys.optflags & 1) && !mt->statvfs.f_blocks) return;
+
+ // Figure out how much total/used/free space this filesystem has,
+ // forcing 64-bit math because filesystems are big now.
+ block = mt->statvfs.f_bsize ? : 1;
+
+ size = (long)((block * mt->statvfs.f_blocks) / toy.df.units);
+ used = (long)((block * (mt->statvfs.f_blocks-mt->statvfs.f_bfree))
+ / toy.df.units);
+ avail = (long)((block
+ * (getuid() ? mt->statvfs.f_bavail : mt->statvfs.f_bfree))
+ / toy.df.units);
+ percent = 100-(long)((100*(uint64_t)avail)/size);
+
+ // Figure out appropriate spacing
+ len = 25 - strlen(mt->device);
+ if (len < 1) len = 1;
+ if (CFG_DF_PEDANTIC && (toys.optflags & 8)) {
+ printf("%s %ld %ld %ld %ld%% %s\n", mt->device, size, used, avail,
+ percent, mt->dir);
+ } else {
+ printf("%s% *ld % 10ld % 9ld % 3ld%% %s\n",mt->device, len,
+ size, used, avail, percent, mt->dir);
+ }
+}
+
+int df_main(void)
+{
+ struct mtab_list *mt, *mt2, *mtlist;
+ char **argv;
+
+ // get_optflags("Pkt:a",&(toy.df.fstype));
+ argv = NULL;
+
+ // Handle -P and -k
+ toy.df.units = 1024;
+ if (CFG_DF_PEDANTIC && (toys.optflags & 8)) {
+ // Units are 512 bytes if you select "pedantic" without "kilobytes".
+ if ((toys.optflags&3) == 1) toy.df.units = 512;
+ printf("Filesystem %ld-blocks Used Available Capacity Mounted on\n",
+ toy.df.units);
+ } else puts("Filesystem\t1K-blocks\tUsed Available Use% Mounted on");
+
+ mtlist = getmountlist(1);
+
+ // If we have a list of filesystems on the command line, loop through them.
+ if (argv) {
+ char *next;
+
+ for(next = *argv; *next; next++) {
+ struct stat st;
+
+ // Stat it (complain if we can't).
+ if(!stat(next, &st)) {
+ perror_msg("`%s'", next);
+ toys.exitval = 1;
+ continue;
+ }
+
+ // Find and display this filesystem. Use _last_ hit in case of
+ // -- bind mounts.
+ mt2 = NULL;
+ for (mt = mtlist; mt; mt = mt->next)
+ if (st.st_dev == mt->stat.st_dev) mt2 = mt;
+ show_mt(mt2);
+ }
+ } else {
+ // Get and loop through mount list.
+
+ for (mt = mtlist; mt; mt = mt->next) {
+ struct mtab_list *mt2, *mt3;
+
+ if (!mt->stat.st_dev) continue;
+
+ // Filter out overmounts.
+ mt3 = mt;
+ for (mt2 = mt->next; mt2; mt2 = mt2->next) {
+ if (mt->stat.st_dev == mt2->stat.st_dev) {
+ // For --bind mounts, take last match
+ if (!strcmp(mt->device, mt2->device)) mt3 = mt2;
+ // Filter out overmounts
+ mt2->stat.st_dev = 0;
+ }
+ }
+ show_mt(mt3);
+ }
+ }
+
+ if (CFG_TOYS_FREE) {
+ llist_free(mtlist, NULL);
+ free(argv);
+ }
+ return 0;
+}
diff --git a/toys/toysh.c b/toys/toysh.c
new file mode 100644
index 00000000..7ac430c9
--- /dev/null
+++ b/toys/toysh.c
@@ -0,0 +1,214 @@
+/* vi: set sw=4 ts=4:
+ *
+ * toysh - toybox shell
+ *
+ * Copyright 2006 Rob Landley <rob@landley.net>
+ *
+ * The spec for this is at:
+ * http://www.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html
+ *
+ * Although things like the bash man page are good to read too.
+ */
+
+// Handle embedded NUL bytes in the command line.
+
+#include "toys.h"
+
+// A single executable, its arguments, and other information we know about it.
+#define TOYSH_FLAG_EXIT 1
+#define TOYSH_FLAG_SUSPEND 2
+#define TOYSH_FLAG_PIPE 4
+#define TOYSH_FLAG_AND 8
+#define TOYSH_FLAG_OR 16
+#define TOYSH_FLAG_AMP 32
+#define TOYSH_FLAG_SEMI 64
+#define TOYSH_FLAG_PAREN 128
+
+// What we know about a single process.
+struct command {
+ struct command *next;
+ int flags; // exit, suspend, && ||
+ int pid; // pid (or exit code)
+ int argc;
+ char *argv[0];
+};
+
+// A collection of processes piped into/waiting on each other.
+struct pipeline {
+ struct pipeline *next;
+ int job_id;
+ struct command *cmd;
+ char *cmdline; // Unparsed line for display purposes
+ int cmdlinelen; // How long is cmdline?
+};
+
+// Parse one word from the command line, appending one or more argv[] entries
+// to struct command. Handles environment variable substitution and
+// substrings. Returns pointer to next used byte, or NULL if it
+// hit an ending token.
+static char *parse_word(char *start, struct command **cmd)
+{
+ char *end;
+
+ // Detect end of line (and truncate line at comment)
+ if (CFG_TOYSH_PIPES && strchr("><&|(;", *start)) return 0;
+
+ // Grab next word. (Add dequote and envvar logic here)
+ end = start;
+ while (*end && !isspace(*end)) end++;
+ (*cmd)->argv[(*cmd)->argc++] = xstrndup(start, end-start);
+
+ // Allocate more space if there's no room for NULL terminator.
+
+ if (!((*cmd)->argc & 7))
+ xrealloc((void **)cmd,
+ sizeof(struct command) + ((*cmd)->argc+8)*sizeof(char *));
+ (*cmd)->argv[(*cmd)->argc] = 0;
+ return end;
+}
+
+// Parse a line of text into a pipeline.
+// Returns a pointer to the next line.
+
+static char *parse_pipeline(char *cmdline, struct pipeline *line)
+{
+ struct command **cmd = &(line->cmd);
+ char *start = line->cmdline = cmdline;
+
+ if (!cmdline) return 0;
+
+ if (CFG_TOYSH_JOBCTL) line->cmdline = cmdline;
+
+ // Parse command into argv[]
+ for (;;) {
+ char *end;
+
+ // Skip leading whitespace and detect end of line.
+ while (isspace(*start)) start++;
+ if (!*start || *start=='#') {
+ if (CFG_TOYSH_JOBCTL) line->cmdlinelen = start-cmdline;
+ return 0;
+ }
+
+ // Allocate next command structure if necessary
+ if (!*cmd) *cmd = xzalloc(sizeof(struct command)+8*sizeof(char *));
+
+ // Parse next argument and add the results to argv[]
+ end = parse_word(start, cmd);
+
+ // If we hit the end of this command, how did it end?
+ if (!end) {
+ if (CFG_TOYSH_PIPES && *start) {
+ if (*start==';') {
+ start++;
+ break;
+ }
+ // handle | & < > >> << || &&
+ }
+ break;
+ }
+ start = end;
+ }
+
+ if (CFG_TOYSH_JOBCTL) line->cmdlinelen = start-cmdline;
+
+ return start;
+}
+
+// Execute the commands in a pipeline
+static void run_pipeline(struct pipeline *line)
+{
+ struct toy_list *tl;
+ struct command *cmd = line->cmd;
+ if (!cmd || !cmd->argc) return;
+
+ tl = toy_find(cmd->argv[0]);
+ // Is this command a builtin that should run in this process?
+ if (tl && (tl->flags & TOYFLAG_NOFORK)) {
+ struct toy_list *which = toys.which;
+ char **argv = toys.argv;
+
+ toy_init(tl, cmd->argv);
+ cmd->pid = tl->toy_main();
+ toy_init(which, argv);
+ } else {
+ int status;
+
+ cmd->pid = vfork();
+ if (!cmd->pid) xexec(cmd->argv);
+ else waitpid(cmd->pid, &status, 0);
+
+ if (CFG_TOYSH_FLOWCTL || CFG_TOYSH_PIPES) {
+ if (WIFEXITED(status)) cmd->pid = WEXITSTATUS(status);
+ if (WIFSIGNALED(status)) cmd->pid = WTERMSIG(status);
+ }
+ }
+
+ return;
+}
+
+// Free the contents of a command structure
+static void free_cmd(void *data)
+{
+ struct command *cmd=(struct command *)data;
+
+ while(cmd->argc) free(cmd->argv[--cmd->argc]);
+}
+
+
+// Parse a command line and do what it says to do.
+static void handle(char *command)
+{
+ struct pipeline line;
+ char *start = command;
+
+ // Loop through commands in this line
+
+ for (;;) {
+
+ // Parse a group of connected commands
+
+ memset(&line,0,sizeof(struct pipeline));
+ start = parse_pipeline(start, &line);
+ if (!line.cmd) break;
+
+ // Run those commands
+
+ run_pipeline(&line);
+ llist_free(line.cmd, free_cmd);
+ }
+}
+
+int cd_main(void)
+{
+ char *dest = toys.argv[1] ? toys.argv[1]: getenv("HOME");
+ if (chdir(dest)) error_exit("chdir %s",dest);
+ return 0;
+}
+
+int exit_main(void)
+{
+ exit(toys.argv[1] ? atoi(toys.argv[1]) : 0);
+}
+
+int toysh_main(void)
+{
+ char *command=NULL;
+ FILE *f;
+
+ // TODO get_optflags(argv, "c:", &command);
+
+ f = toys.argv[1] ? xfopen(toys.argv[1], "r") : NULL;
+ if (command) handle(command);
+ else {
+ unsigned cmdlen=0;
+ for (;;) {
+ if (!f) putchar('$');
+ if (1 > getline(&command, &cmdlen, f ? : stdin)) break;
+ handle(command);
+ }
+ if (CFG_TOYS_FREE) free(command);
+ }
+
+ return 1;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 01:44:24 +0000