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https://codeberg.org/libreboot/lbmk.git
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e9a910b33c
i currently use the output of sha512sum in several places of xbmk, which is a bit unreliable in case output changes. other cases where i use util outputs in variables are probably reliable, because i'm using mostly posix utilities in those. to mitigate this, i now import suckless sbase, which has a reasonable sha512sum implementation. *every* binary it builds is being placed in build.list, because i'll probably start using more of them. for example, i may start modifying the "date" implementation, adding the GNU-specific options that i need as mentioned on init.sh i'm importing it in util/ because the sha512sum util is needed for verifying project sources, so if sbase itself is a "project source", that means we can into a chicken and egg bootstrapping problem. this is sbase at revision: 055cc1ae1b3a13c3d8f25af0a4a3316590efcd48 Signed-off-by: Leah Rowe <leah@libreboot.org>
122 lines
2.8 KiB
Groff
122 lines
2.8 KiB
Groff
.Dd July 30, 2025
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.Dt XARGS 1
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.Os sbase
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.Sh NAME
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.Nm xargs
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.Nd construct argument lists and execute command
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.Sh SYNOPSIS
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.Nm
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.Op Fl 0prtx
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.Op Fl E Ar eofstr
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.Op Fl I Ar replstr
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.Op Fl n Ar num
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.Op Fl P Ar maxprocs
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.Op Fl s Ar num
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.Op Ar cmd Op Ar arg ...
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.Sh DESCRIPTION
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.Nm
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reads space, tab, newline and EOF delimited strings from stdin
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and executes the specified
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.Ar cmd
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with the strings as
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.Ar arguments .
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.Pp
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Any arguments specified on the command line are given to the command upon
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each invocation, followed by some number of the arguments read from
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stdin.
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The command is repeatedly executed one or more times until stdin is exhausted.
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.Pp
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Spaces, tabs and newlines may be embedded in arguments using single (`'')
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or double (`"') quotes or backslashes ('\e').
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Single quotes escape all non-single quote characters, excluding newlines, up
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to the matching single quote.
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Double quotes escape all non-double quote characters, excluding newlines, up
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to the matching double quote.
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Any single character, including newlines, may be escaped by a backslash.
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.Sh OPTIONS
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.Bl -tag -width Ds
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.It Fl 0
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Change
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.Nm
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to expect NUL ('\e0') characters as separators, instead of spaces
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and newlines.
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The quoting mechanisms described above are not performed.
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.It Fl E Ar eofstr
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Use
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.Ar eofstr
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as a logical EOF marker.
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.It Fl I Ar replstr
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Use
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.Ar replstr
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as the placeholder for the argument.
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Sets the arguments count to 1 per command line.
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It also implies the option x.
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.It Fl n Ar num
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Use at most
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.Ar num
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arguments per command line.
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.It Fl p
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Prompt mode: the user is asked whether to execute
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.Ar cmd
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at each invocation.
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Trace mode (-t) is turned on to write the command instance to be executed,
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followed by a prompt to standard error.
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An affirmative response read from
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.Pa /dev/tty
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executes the command, otherwise it is skipped.
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.It Fl P Ar maxprocs
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Parallel mode: run at most maxprocs invocations of
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.Ar cmd
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at once.
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.It Fl r
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Do not run the command if there are no arguments.
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Normally the command is executed at least once even if there are no arguments.
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.It Fl s Ar num
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Use at most
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.Ar num
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bytes per command line.
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.It Fl t
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Enable trace mode.
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Write the command line to stderr before executing it.
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.It Fl x
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Terminate if the command line exceeds the system limit or the number of bytes
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given with the
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.Op Fl s
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flag.
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.El
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.Sh EXIT STATUS
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.Nm
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exits with one of the following values:
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.Bl -tag -width Ds
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.It 0
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All invocations of
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.Ar cmd
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returned a zero exit status.
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.It 123
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One or more invocations of
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.Ar cmd
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returned a nonzero exit status.
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.It 124
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.Ar cmd
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exited with a 255 exit status.
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.It 125
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.Ar cmd
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was killed or stopped by a signal.
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.It 126
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.Ar cmd
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was found but could not be executed.
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.It 127
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.Ar cmd
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could not be found.
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.It 1
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Some other error occurred.
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.El
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.Sh STANDARDS
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POSIX.1-2013.
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.Pp
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The
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.Op Fl r
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and
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.Op Fl P
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flag is an extension to that specification.
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