ccs/admin/shells.c

// Douglas Thrift
//
// CCS Computer Science
//   Shells
//
// $Id$

#include <stdbool.h>

#include "common.h"

int main(int argc, char *argv[])
{
        int exception;
        jmp_buf environment;

        switch (exception = setjmp(environment))
        {
        case 0:
                break;
        case 1:
                perror(argv[0]);

                return 1;
        default:
                fprintf(stderr, "%s: %s\n", argv[0], (char *)exception);

                return 1;
        }

        char *shells_[custom];

        for (Shell shell = sh; shell != _3sh; ++shell)
        {
                int pipe_[2];

                check(pipe(pipe_), environment);

                pid_t which;

                if (!(which = check(fork(), environment)))
                {
                        check(dup2(pipe_[1], 1), environment);
                        check(close(pipe_[0]), environment);
                        check(execlp("which", argv[0], shells[shell].name, NULL), environment);
                }

                check(close(pipe_[1]), environment);

                FILE *which_ = fdopen(pipe_[0], "r");
                size_t size;
                char *shell_ = fcheck(fgetln(which_, &size), which_, environment);
                int status;

                check(waitpid(which, &status, 0), environment);

                if (WEXITSTATUS(status))
                {
                        char *error = malloc(strlen(shells[shell].name) + 18);

                        sprintf(error, "Shell not found: %s", shells[shell].name);
                        longjmp(environment, (int)error);
                }

                shells_[shell] = malloc(size);

                strlcpy(shells_[shell], shell_, size);
        }

        bool match;

#       define checkshells(os) \
        match = true; \
        \
        for (Shell shell = sh; shell != _3sh; ++shell) \
                if (strcmp(shells[shell].os, shells_[shell])) \
                { \
                        match = false; \
                        \
                        break; \
                } \
        \
        if (match) \
        { \
                printf(#os "\n"); \
                \
                goto on; \
        }

        checkshells(freebsd);
        checkshells(linux);
        checkshells(darwin);
        checkshells(solaris);
        checkshells(netbsd);

#       undef checkshells

        longjmp(environment, (int)"Unknown shell layout");

on:     for (Shell shell = sh; shell != _3sh; ++shell)
                free(shells_[shell]);

        return 0;
}
Revision:	34
Committed:	2007-02-02T01:56:37-08:00 (18 years, 5 months ago) by douglas
Content type:	text/x-c
File size:	1785 byte(s)
Log Message:	Fix adduser to not add people to games and instead add them to fuse, thanks Debian bastards! Oops! Update users.h to have users/groups from Debian. Created shells to check if shell locations layouts match the ones in LDAP and tell which one.
#	User	Rev	Content
1	douglas	1	// Douglas Thrift
2			//
3			// CCS Computer Science
4	douglas	34	// Shells
5	douglas	1	//
6			// $Id$
7
8	douglas	34	#include <stdbool.h>
9	douglas	1
10			#include "common.h"
11
12			int main(int argc, char *argv[])
13			{
14			int exception;
15			jmp_buf environment;
16
17			switch (exception = setjmp(environment))
18			{
19			case 0:
20			break;
21			case 1:
22			perror(argv[0]);
23
24			return 1;
25			default:
26			fprintf(stderr, "%s: %s\n", argv[0], (char *)exception);
27
28			return 1;
29			}
30
31	douglas	34	char *shells_[custom];
32	douglas	1
33	douglas	34	for (Shell shell = sh; shell != _3sh; ++shell)
34			{
35			int pipe_[2];
36	douglas	1
37	douglas	34	check(pipe(pipe_), environment);
38	douglas	1
39	douglas	34	pid_t which;
40	douglas	1
41	douglas	34	if (!(which = check(fork(), environment)))
42			{
43			check(dup2(pipe_[1], 1), environment);
44			check(close(pipe_[0]), environment);
45			check(execlp("which", argv[0], shells[shell].name, NULL), environment);
46			}
47
48			check(close(pipe_[1]), environment);
49
50			FILE *which_ = fdopen(pipe_[0], "r");
51			size_t size;
52			char *shell_ = fcheck(fgetln(which_, &size), which_, environment);
53			int status;
54
55			check(waitpid(which, &status, 0), environment);
56
57			if (WEXITSTATUS(status))
58			{
59			char *error = malloc(strlen(shells[shell].name) + 18);
60
61			sprintf(error, "Shell not found: %s", shells[shell].name);
62			longjmp(environment, (int)error);
63			}
64
65			shells_[shell] = malloc(size);
66
67			strlcpy(shells_[shell], shell_, size);
68			}
69
70			bool match;
71
72			# define checkshells(os) \
73			match = true; \
74			\
75			for (Shell shell = sh; shell != _3sh; ++shell) \
76			if (strcmp(shells[shell].os, shells_[shell])) \
77			{ \
78			match = false; \
79			\
80			break; \
81			} \
82			\
83			if (match) \
84			{ \
85			printf(#os "\n"); \
86			\
87			goto on; \
88			}
89
90			checkshells(freebsd);
91			checkshells(linux);
92			checkshells(darwin);
93			checkshells(solaris);
94			checkshells(netbsd);
95
96			# undef checkshells
97
98			longjmp(environment, (int)"Unknown shell layout");
99
100			on: for (Shell shell = sh; shell != _3sh; ++shell)
101			free(shells_[shell]);
102
103	douglas	1	return 0;
104			}