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676599b36a
This prevents injection of ':' and '\n' into output functions which use the NSS files database syntax. Critical fields (user/group names and file system paths) are checked strictly. For backwards compatibility, the GECOS field is rewritten instead. The getent program is adjusted to use the put*ent functions in libc, instead of local copies. This changes the behavior of getent if user names start with '-' or '+'.
58 lines
2.1 KiB
C
58 lines
2.1 KiB
C
#ifndef _PWD_H
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#include <pwd/pwd.h>
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#ifndef _ISOMAC
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/* Now define the internal interfaces. */
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extern int __getpwent_r (struct passwd *__resultbuf, char *__buffer,
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size_t __buflen, struct passwd **__result)
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attribute_hidden;
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extern int __old_getpwent_r (struct passwd *__resultbuf, char *__buffer,
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size_t __buflen, struct passwd **__result);
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extern int __getpwuid_r (__uid_t __uid, struct passwd *__resultbuf,
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char *__buffer, size_t __buflen,
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struct passwd **__result);
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extern int __old_getpwuid_r (__uid_t __uid, struct passwd *__resultbuf,
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char *__buffer, size_t __buflen,
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struct passwd **__result);
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extern int __getpwnam_r (const char *__name, struct passwd *__resultbuf,
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char *__buffer, size_t __buflen,
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struct passwd **__result);
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extern int __old_getpwnam_r (const char *__name, struct passwd *__resultbuf,
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char *__buffer, size_t __buflen,
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struct passwd **__result);
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extern int __fgetpwent_r (FILE * __stream, struct passwd *__resultbuf,
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char *__buffer, size_t __buflen,
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struct passwd **__result);
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#include <nss.h>
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struct parser_data;
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extern int _nss_files_parse_pwent (char *line, struct passwd *result,
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struct parser_data *data,
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size_t datalen, int *errnop);
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libc_hidden_proto (_nss_files_parse_pwent)
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#define DECLARE_NSS_PROTOTYPES(service) \
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extern enum nss_status _nss_ ## service ## _setpwent (int); \
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extern enum nss_status _nss_ ## service ## _endpwent (void); \
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extern enum nss_status _nss_ ## service ## _getpwnam_r \
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(const char *name, struct passwd *pwd, \
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char *buffer, size_t buflen, int *errnop); \
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extern enum nss_status _nss_ ## service ## _getpwuid_r \
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(uid_t uid, struct passwd *pwd, \
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char *buffer, size_t buflen, int *errnop); \
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extern enum nss_status _nss_ ## service ##_getpwent_r \
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(struct passwd *result, char *buffer, \
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size_t buflen, int *errnop);
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DECLARE_NSS_PROTOTYPES (compat)
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DECLARE_NSS_PROTOTYPES (files)
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DECLARE_NSS_PROTOTYPES (hesiod)
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DECLARE_NSS_PROTOTYPES (nis)
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DECLARE_NSS_PROTOTYPES (nisplus)
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#undef DECLARE_NSS_PROTOTYPES
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#endif
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#endif
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