Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 | .. SPDX-License-Identifier: GPL-2.0+: .. index:: single: printenv (command) printenv command ================ Synopsis -------- :: printenv [-a] [name ...] printenv -e [-guid guid][-n][-s][-v] [name] Description ----------- The printenv command is used to print environment or UEFI variables. \-a Print environment variables starting with a period ('.'). \-e Print UEFI variables. Without -e environment variables are printed. \-guid *guid* Specify vendor GUID *guid*. If none is specified, all UEFI variables with the specified name are printed irrespective of their vendor GUID. \-n don't show hexadecimal dump of value \-s sort variables by name before displaying \-v show verbose output including GUID, attributes, data size and hexadecimal dump of value (if not -n) name Variable name. If no name is provided, all variables are printed. Multiple environment variable names may be specified. Examples -------- The following examples demonstrates the effect of the *-a* flag when displaying environment variables: :: => setenv .foo bar => printenv arch=sandbox baudrate=115200 board=sandbox ... stdout=serial,vidconsole Environment size: 644/8188 bytes => printenv -a .foo=bar arch=sandbox baudrate=115200 board=sandbox ... stdout=serial,vidconsole Environment size: 653/8188 bytes => The next example shows the different output modes when displaying UEFI variables and how to specify a vendor GUID. By default, only the variable name is shown. The *-v* flag shows full verbose output, while *-n* shows details but omits the hexadecimal dump. The *-s* flag sorts variables by name: :: => printenv -e PlatformLangCodes PlatformLangCodes => printenv -e -v -n PlatformLangCodes PlatformLangCodes: 8be4df61-93ca-11d2-aa0d-00e098032b8c (EFI_GLOBAL_VARIABLE_GUID) BS|RT|RO, DataSize = 0x6 => printenv -e -v -guid 8be4df61-93ca-11d2-aa0d-00e098032b8c PlatformLangCodes PlatformLangCodes: 8be4df61-93ca-11d2-aa0d-00e098032b8c (EFI_GLOBAL_VARIABLE_GUID) BS|RT|RO, DataSize = 0x6 00000000: 65 6e 2d 55 53 00 en-US. => print -e -s 525400123456 525400123456 Attempt 1 Attempt 2 Attempt 3 Attempt 4 Attempt 5 Attempt 6 Attempt 7 Attempt 8 Boot0000 Boot0001 Boot0002 Boot0003 BootCurrent BootOptionSupport BootOrder ClientId ConIn ConInDev ConOut ConOutDev ErrOut ErrOutDev HDDP InitialAttemptOrder Key0000 Key0001 Lang LangCodes MTC MemoryTypeInformation OsIndicationsSupported PlatformLang PlatformLangCodes PlatformRecovery0000 SbatLevel Timeout VarErrorFlag cat cd.. cd\ copy debuglasterror del dir lasterror md mem mount move nonesting path profiles ren uefishellsupport uefishellversion uefiversion Configuration ------------- UEFI variables are only supported if CONFIG_CMD_NVEDIT_EFI=y. The value of UEFI variables can only be displayed if CONFIG_HEXDUMP=y. Return value ------------ The return value $? is 1 (false) if a specified variable is not found. Otherwise $? is set to 0 (true). |