The Linux Manuals (man pages) document is an important part of Linux documents. Linux Manuals are organized as several sections. Each section has a group of commands for a specific area in Linux usage, administration or development.
getmode setmode – modify mode bits Library Lb libbsd Synopsis In bsd/unistd.h Ft void * Fn setmode const char *mode_str Ft mode_t Fn getmode const void *set mode_t mode Description The Fn setmode function accepts a string representation of a file mode change, compiles it to binary form, and returns an abstract representation that may…
getmntent, setmntent, addmntent, endmntent, hasmntopt, getmntent_r – get filesystem descriptor file entry Synopsis #include <mntent.h> #include <stdio.h> FILE *setmntent(const char *filename, const char *type); struct mntent *getmntent(FILE *stream); int addmntent(FILE *stream, const struct mntent *mnt); int endmntent(FILE *streamp); char *hasmntopt(const struct mntent *mnt, const char *opt); /* GNU extension */ #include <mntent.h> struct mntent *getmntent_r(FILE…
setlogmask – set log priority mask Synopsis #include <syslog.h> int setlogmask(int mask); Description A process has a log priority mask that determines which calls to syslog(3) may be logged. All other calls will be ignored. Logging is enabled for the priorities that have the corresponding bit set in mask. The initial mask is such that…
setlocale – set the current locale Synopsis #include <locale.h> char *setlocale(int category, const char *locale); Description The setlocale() function is used to set or query the program’s current locale. If locale is not NULL, the program’s current locale is modified according to the arguments. The argument category determines which parts of the program’s current locale…
setbuf, setbuffer, setlinebuf, setvbuf – stream buffering operations Synopsis #include <stdio.h> void setbuf(FILE *stream, char *buf); void setbuffer(FILE *stream, char *buf, size_t size); void setlinebuf(FILE *stream); int setvbuf(FILE *stream, char *buf, int mode, size_t size); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): setbuffer(), setlinebuf(): Since glibc 2.19: _DEFAULT_SOURCE Glibc 2.19 and earlier: _BSD_SOURCE Description…
getkeycreatecon, setkeycreatecon – get or set the SELinux security context used for creating a new kernel keyrings Synopsis #include <selinux/selinux.h> int getkeycreatecon(char **con); int getkeycreatecon_raw(char **con); int setkeycreatecon(char *context); int setkeycreatecon_raw(char *context); Description getkeycreatecon() retrieves the context used for creating a new kernel keyring. This returned context should be freed with freecon(3) if non-NULL. getkeycreatecon()…
getkeycreatecon, setkeycreatecon – get or set the SELinux security context used for creating a new kernel keyrings Synopsis #include <selinux/selinux.h> int getkeycreatecon(char **con); int getkeycreatecon_raw(char **con); int setkeycreatecon(char *context); int setkeycreatecon_raw(char *context); Description getkeycreatecon() retrieves the context used for creating a new kernel keyring. This returned context should be freed with freecon(3) if non-NULL. getkeycreatecon()…
encrypt, setkey, encrypt_r, setkey_r – encrypt 64-bit messages Synopsis #define _XOPEN_SOURCE /* See feature_test_macros(7) */ #include <unistd.h> void encrypt(char block[64], int edflag); #define _XOPEN_SOURCE /* See feature_test_macros(7) */ #include <stdlib.h> void setkey(const char *key); #define _GNU_SOURCE /* See feature_test_macros(7) */ #include <crypt.h> void setkey_r(const char *key, struct crypt_data *data); void encrypt_r(char *block, int edflag, struct…
encrypt, setkey, encrypt_r, setkey_r – encrypt 64-bit messages Synopsis #define _XOPEN_SOURCE /* See feature_test_macros(7) */ #include <unistd.h> void encrypt(char block[64], int edflag); #define _XOPEN_SOURCE /* See feature_test_macros(7) */ #include <stdlib.h> void setkey(const char *key); #define _GNU_SOURCE /* See feature_test_macros(7) */ #include <crypt.h> void setkey_r(const char *key, struct crypt_data *data); void encrypt_r(char *block, int edflag, struct…
setjmp, sigsetjmp, longjmp, siglongjmp – performing a nonlocal goto Synopsis #include <setjmp.h> int setjmp(jmp_buf env); int sigsetjmp(sigjmp_buf env, int savesigs); void longjmp(jmp_buf env, int val); void siglongjmp(sigjmp_buf env, int val); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): setjmp(): see NOTES. sigsetjmp(): _POSIX_C_SOURCE Description The functions described on this page are used for performing "nonlocal…
gethostid, sethostid – get or set the unique identifier of the current host Synopsis #include <unistd.h> long gethostid(void); int sethostid(long hostid); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): gethostid(): _BSD_SOURCE || _XOPEN_SOURCE >= 500 sethostid(): Since glibc 2.21: _DEFAULT_SOURCE In glibc 2.19 and 2.20: _DEFAULT_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500) Up to and including glibc 2.19: _BSD_SOURCE…
gethostbyname, gethostbyaddr, sethostent, gethostent, endhostent, h_errno, herror, hstrerror, gethostbyaddr_r, gethostbyname2, gethostbyname2_r, gethostbyname_r, gethostent_r – get network host entry Synopsis #include <netdb.h> extern int h_errno; struct hostent *gethostbyname(const char *name); #include <sys/socket.h> /* for AF_INET */ struct hostent *gethostbyaddr(const void *addr, socklen_t len, int type); void sethostent(int stayopen); void endhostent(void); void herror(const char *s); const char…
getgrent, setgrent, endgrent – get group file entry Synopsis #include <grp.h> #include <sys/types.h> struct group *getgrent(void); void setgrent(void); void endgrent(void); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): setgrent(): _XOPEN_SOURCE >= 500 || /* Glibc since 2.19: */ _DEFAULT_SOURCE || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE getgrent(), endgrent(): Since glibc 2.22: _XOPEN_SOURCE >= 500 || _DEFAULT_SOURCE Glibc 2.21 and earlier _XOPEN_SOURCE >= 500 || /* Since glibc 2.12: */ _POSIX_C_SOURCE >= 200809L || /* Glibc versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE…
getfsent, getfsspec, getfsfile, setfsent, endfsent – handle fstab entries Synopsis #include <fstab.h> void endfsent(void); struct fstab *getfsent(void); struct fstab *getfsfile(const char *mount_point); struct fstab *getfsspec(const char *special_file); int setfsent(void); Description These functions read from the file /etc/fstab. The struct fstab is defined by: struct fstab { char *fs_spec; /* block device name */ char *fs_file;…
getfscreatecon, setfscreatecon – get or set the SELinux security context used for creating a new file system object Synopsis #include <selinux/selinux.h> int getfscreatecon(char **con); int getfscreatecon_raw(char **con); int setfscreatecon(char *context); int setfscreatecon_raw(char *context); Description getfscreatecon() retrieves the context used for creating a new file system object. This returned context should be freed with freecon(3) if…
getfscreatecon, setfscreatecon – get or set the SELinux security context used for creating a new file system object Synopsis #include <selinux/selinux.h> int getfscreatecon(char **con); int getfscreatecon_raw(char **con); int setfscreatecon(char *context); int setfscreatecon_raw(char *context); Description getfscreatecon() retrieves the context used for creating a new file system object. This returned context should be freed with freecon(3) if…
setfilecon, fsetfilecon, lsetfilecon – set SELinux security context of a file Synopsis #include <selinux/selinux.h> int setfilecon(const char *path, char *con); int setfilecon_raw(const char *path, char *con); int lsetfilecon(const char *path, char *con); int lsetfilecon_raw(const char *path, char *con); int fsetfilecon(int fd, char *con); int fsetfilecon_raw(int fd, char *con); Description setfilecon() sets the security context of…
setfilecon, fsetfilecon, lsetfilecon – set SELinux security context of a file Synopsis #include <selinux/selinux.h> int setfilecon(const char *path, char *con); int setfilecon_raw(const char *path, char *con); int lsetfilecon(const char *path, char *con); int lsetfilecon_raw(const char *path, char *con); int fsetfilecon(int fd, char *con); int fsetfilecon_raw(int fd, char *con); Description setfilecon() sets the security context of…
getexeccon, setexeccon – get or set the SELinux security context used for executing a new process rpm_execcon – run a helper for rpm in an appropriate security context Synopsis #include <selinux/selinux.h> int getexeccon(char **context); int getexeccon_raw(char **context); int setexeccon(char *context); int setexeccon_raw(char *context); int setexecfilecon(const char *filename, const char *fallback_type); int rpm_execcon(unsigned int verified, const…
getexeccon, setexeccon – get or set the SELinux security context used for executing a new process rpm_execcon – run a helper for rpm in an appropriate security context Synopsis #include <selinux/selinux.h> int getexeccon(char **context); int getexeccon_raw(char **context); int setexeccon(char *context); int setexeccon_raw(char *context); int setexecfilecon(const char *filename, const char *fallback_type); int rpm_execcon(unsigned int verified, const…