Busybox login: can't execute'/bin/bash': no such file or directory solution

1. Problem description

Embedded development board , Start up and execute login, When logging in , Pop up the prompt
login: can’t execute ‘/bin/bash’: No such file or directory

2. Problem analysis

busybox Support ash、hush、msh Three shell, But not supported bash

3. Modification method

3.1 Method 1、 modify login Source code , Change it to sh perform

In this paper, the busybox Version is busybox-1.22.1
The source path is busybox-1.22.1/loginutils/login.c
perform login Action in int login_main(int argc UNUSED_PARAM, char **argv) Function , Source code is as follows

    /* Exec login shell with no additional parameters */
    run_shell(pw->pw_shell, 1, NULL, NULL);

    /* return EXIT_FAILURE; - not reached */

among

run_shell(pw->pw_shell, 1, NULL, NULL);

pw->pw_shell For the actual shell command , The content is “/bin/bash”, therefore login, use /bin/bash How to execute .
Modification method , take /bin/bash It is amended as follows /bin/sh, The modified code is as follows

    /* Exec login shell with no additional parameters */
    //run_shell(pw->pw_shell, 1, NULL, NULL);
    // modified by houfei, use the "/bin/sh" exec login, default "pw->pw_shell" is "/bin/bash"
    run_shell("/bin/sh", 1, NULL, NULL);

    /* return EXIT_FAILURE; - not reached */

3.2 Method 2 modify rcS file

modify etc/init.d/rcS Of documents shell The parser is sh Or others .