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Diffstat (limited to 'doc/file.man')
| -rw-r--r-- | doc/file.man | 134 |
1 files changed, 66 insertions, 68 deletions
diff --git a/doc/file.man b/doc/file.man index 6f284226..8e81152c 100644 --- a/doc/file.man +++ b/doc/file.man @@ -1,5 +1,5 @@ -.\" $File: file.man,v 1.127 2017/12/25 15:08:44 christos Exp $ -.Dd December 25, 2017 +.\" $File: file.man,v 1.128 2017/12/28 14:51:55 christos Exp $ +.Dd December 28, 2017 .Dt FILE __CSECTION__ .Os .Sh NAME @@ -168,7 +168,8 @@ in any of the character sets listed above is simply said to be .Bl -tag -width indent .It Fl Fl apple Causes the file command to output the file type and creator code as -used by older MacOS versions. The code consists of eight letters, +used by older MacOS versions. +The code consists of eight letters, the first describing the file type, the latter the creator. .It Fl b , Fl Fl brief Do not prepend filenames to output lines (brief mode). @@ -222,7 +223,7 @@ the soft magic method. A synonym for .Sq ascii . .El -.It Fl Fl extension +.It Fl Fl extension Print a slash-separated list of valid extensions for the file type found. .It Fl F , Fl Fl separator Ar separator Use the specified string as the separator between the filename and the @@ -368,39 +369,13 @@ Nice to the output. This does not affect the separator, which is still printed. .Pp -If this option is repeated more than once, then +If this option is repeated more than once, then .Nm prints just the filename followed by a NUL followed by the description (or ERROR: text) followed by a second NUL for each entry. .It Fl -help Print a help message and exit. .El -.Sh EXIT STATUS -.Nm -will exit with -.Dv 0 -if the operation was successful or -.Dv >0 -if an error was encountered. -The following errors cause diagnostic messages, but don't affect the program -exit code (as POSIX requires), unless -.Fl E -is specified: -.Bl -bullet -compact -offset indent -.It -A file cannot be found -.It -There is no permission to read a file -.It -The file type cannot be determined -.El -.Sh FILES -.Bl -tag -width __MAGIC__.mgc -compact -.It Pa __MAGIC__.mgc -Default compiled list of magic. -.It Pa __MAGIC__ -Directory containing default magic files. -.El .Sh ENVIRONMENT The environment variable .Ev MAGIC @@ -426,6 +401,65 @@ This is also controlled by the and .Fl h options. +.Sh FILES +.Bl -tag -width __MAGIC__.mgc -compact +.It Pa __MAGIC__.mgc +Default compiled list of magic. +.It Pa __MAGIC__ +Directory containing default magic files. +.El +.Sh EXIT STATUS +.Nm +will exit with +.Dv 0 +if the operation was successful or +.Dv >0 +if an error was encountered. +The following errors cause diagnostic messages, but don't affect the program +exit code (as POSIX requires), unless +.Fl E +is specified: +.Bl -bullet -compact -offset indent +.It +A file cannot be found +.It +There is no permission to read a file +.It +The file type cannot be determined +.El +.Sh EXAMPLES +.Bd -literal -offset indent +$ file file.c file /dev/{wd0a,hda} +file.c: C program text +file: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), + dynamically linked (uses shared libs), stripped +/dev/wd0a: block special (0/0) +/dev/hda: block special (3/0) + +$ file -s /dev/wd0{b,d} +/dev/wd0b: data +/dev/wd0d: x86 boot sector + +$ file -s /dev/hda{,1,2,3,4,5,6,7,8,9,10} +/dev/hda: x86 boot sector +/dev/hda1: Linux/i386 ext2 filesystem +/dev/hda2: x86 boot sector +/dev/hda3: x86 boot sector, extended partition table +/dev/hda4: Linux/i386 ext2 filesystem +/dev/hda5: Linux/i386 swap file +/dev/hda6: Linux/i386 swap file +/dev/hda7: Linux/i386 swap file +/dev/hda8: Linux/i386 swap file +/dev/hda9: empty +/dev/hda10: empty + +$ file -i file.c file /dev/{wd0a,hda} +file.c: text/x-c +file: application/x-executable +/dev/hda: application/x-not-regular-file +/dev/wd0a: application/x-not-regular-file + +.Ed .Sh SEE ALSO .Xr hexdump 1 , .Xr od 1 , @@ -494,39 +528,6 @@ command uses a magic file, keep the old magic file around for comparison purposes (rename it to .Pa __MAGIC__.orig ) . -.Sh EXAMPLES -.Bd -literal -offset indent -$ file file.c file /dev/{wd0a,hda} -file.c: C program text -file: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), - dynamically linked (uses shared libs), stripped -/dev/wd0a: block special (0/0) -/dev/hda: block special (3/0) - -$ file -s /dev/wd0{b,d} -/dev/wd0b: data -/dev/wd0d: x86 boot sector - -$ file -s /dev/hda{,1,2,3,4,5,6,7,8,9,10} -/dev/hda: x86 boot sector -/dev/hda1: Linux/i386 ext2 filesystem -/dev/hda2: x86 boot sector -/dev/hda3: x86 boot sector, extended partition table -/dev/hda4: Linux/i386 ext2 filesystem -/dev/hda5: Linux/i386 swap file -/dev/hda6: Linux/i386 swap file -/dev/hda7: Linux/i386 swap file -/dev/hda8: Linux/i386 swap file -/dev/hda9: empty -/dev/hda10: empty - -$ file -i file.c file /dev/{wd0a,hda} -file.c: text/x-c -file: application/x-executable -/dev/hda: application/x-not-regular-file -/dev/wd0a: application/x-not-regular-file - -.Ed .Sh HISTORY There has been a .Nm @@ -548,7 +549,7 @@ Geoff Collyer found several inadequacies and provided some magic file entries. Contributions of the .Sq \*[Am] -operator by Rob McMahon, +operator by Rob McMahon, .Aq cudcv@warwick.ac.uk , 1989. .Pp @@ -598,9 +599,6 @@ and were written by John Gilmore from his public-domain .Xr tar 1 program, and are not covered by the above license. -.Sh RETURN CODE -.Nm -returns 0 on success, and non-zero on error. .Sh BUGS Please report bugs and send patches to the bug tracker at .Pa http://bugs.gw.com/ |