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authorStrake <strake888@gmail.com>2013-08-17 02:54:58 -0500
committerStrake <strake888@gmail.com>2013-08-17 02:54:58 -0500
commit59bf7ce6a5114ed228cf3bf847ff96a35aa86f54 (patch)
tree4b903bd568ab858e5e0fb9d84be3bbd80de33dd9 /toys/pending/su.c
parent9b504b4afe16636b31b0e52dea69e7478d6fb780 (diff)
downloadtoybox-59bf7ce6a5114ed228cf3bf847ff96a35aa86f54.tar.gz
su: cleanery
* make help message more like others * s/TT\.(.)Argu/TT.\1/g * move environ to toys.h * simplify failure messages * clear password before quit * not check what execve returns * -lc
Diffstat (limited to 'toys/pending/su.c')
-rw-r--r--toys/pending/su.c47
1 files changed, 23 insertions, 24 deletions
diff --git a/toys/pending/su.c b/toys/pending/su.c
index cf9b5997..f49bcb0f 100644
--- a/toys/pending/su.c
+++ b/toys/pending/su.c
@@ -10,7 +10,7 @@ config SU
bool "su"
default n
help
- usage: su [-lmp] [-c cmd] [-s shell] [user [argu...]]
+ usage: su [-lmp] [-c CMD] [-s SHELL] [USER [ARGS...]]
Switch to given user, or root if not given, and call a shell with the given arguments.
@@ -27,12 +27,10 @@ config SU
#include "toys.h"
GLOBALS(
- char *sArgu;
- char *cArgu;
+ char *s;
+ char *c;
)
-extern char **environ;
-
static void deny () {
printf ("Denied\n");
xexit ();
@@ -55,7 +53,7 @@ void su_main () {
}
else name = "root";
shp = getspnam (name);
- if (!shp) perror_exit ("failed to find password");
+ if (!shp) perror_exit ("can't find password");
switch (shp -> sp_pwdp[0]) {
case '!': deny ();
@@ -63,36 +61,37 @@ void su_main () {
default : error_exit ("bad password format");
}
- if (read_password (toybuf, sizeof (toybuf), "Password: ") != 0) perror_exit ("failed to read password");
+ if (read_password (toybuf, sizeof (toybuf), "Password: ") != 0) perror_exit ("can't read password");
passhash = crypt (toybuf, shp -> sp_pwdp);
- if (!passhash) perror_exit ("failed to compute password hash");
for (ii = 0; toybuf[ii]; ii++) toybuf[ii] = 0;
+ if (!passhash) perror_exit ("can't crypt");
if (strcmp (passhash, shp -> sp_pwdp) != 0) deny ();
up = getpwnam (name);
- if (!up) perror_exit ("failed to getpwnam");
+ if (!up) perror_exit ("can't getpwnam");
- if (setuid (up -> pw_uid) < 0) perror_exit ("failed to setuid");
- if (chdir (up -> pw_dir) < 0) perror_exit ("failed to chdir");
+ xsetuid (up -> pw_uid);
+ xchdir (up -> pw_dir);
argu = xmalloc (sizeof (char *)*(toys.optc + 4));
argv = argu;
- argv[0] = toys.optflags & FLAG_s ? TT.sArgu : up -> pw_shell;
+ argv[0] = toys.optflags & FLAG_s ? TT.s : up -> pw_shell;
+ if (toys.optflags & FLAG_l) (argv++)[1] = "-l";
if (toys.optflags & FLAG_c) {
- argv[1] = toys.optflags & FLAG_l ? "-lc" : "-c";
- argv[2] = TT.cArgu;
+ argv[1] = "-c";
+ argv[2] = TT.c;
argv += 2;
}
- else if (toys.optflags & FLAG_l) (argv++)[1] = "-l";
- for (ii = 0; ii < toys.optc; ii++) argv[ii + 1] = toys.optargs[ii];
- if (execve (argu[0], argu,
- toys.optflags & FLAG_l ? (char *[]){
- xmsprintf ( "HOME=%s", up -> pw_dir),
- xmsprintf ("SHELL=%s", up -> pw_shell),
- xmsprintf ( "USER=%s", up -> pw_name),
- xmsprintf ( "TERM=%s", getenv ("TERM")),
- 0
- } : environ) < 0) perror_exit ("failed to exec %s", argu[0]);
+ memcpy (argv + 1, toys.optargs, sizeof (char *)*toys.optc);
+ execve (argu[0], argu,
+ toys.optflags & FLAG_l ? (char *[]){
+ xmsprintf ( "HOME=%s", up -> pw_dir),
+ xmsprintf ("SHELL=%s", up -> pw_shell),
+ xmsprintf ( "USER=%s", up -> pw_name),
+ xmsprintf ( "TERM=%s", getenv ("TERM")),
+ 0
+ } : environ);
+ perror_exit ("can't exec %s", argu[0]);
}