qsubst(1) [netbsd man page]
QSUBST(1) BSD General Commands Manual QSUBST(1) NAME
qsubst -- query-replace strings in files SYNOPSIS
qsubst str1 str2 [flags] file [file [...]] DESCRIPTION
qsubst reads its options (see below) to get a list of files. For each file on this list, it then replaces str1 with str2 wherever possible in that file, depending on user input (see below). The result is written back onto the original file. For each potential substitution found, the user is prompted with a few lines before and after the line containing the string to be substi- tuted. The string itself is displayed using the terminal's standout mode, if any. Then one character is read from the terminal. This is then interpreted as follows (this is designed to be like Emacs' query-replace-string): space Replace this occurrence and go on to the next one. . Replace this occurrence and don't change any more in this file (i.e., go on to the next file). , Tentatively replace this occurrence. The lines as they would look if the substitution were made are printed out. Then another character is read and it is used to decide the result as if the tentative replacement had not happened. n Don't change this one; just go on to the next one. ^G Don't change this one or any others in this file, but instead simply go on to the next file. ! Change the rest in this file without asking, then go on to the next file (at which point qsubst will start asking again). ? Print out the current filename and ask again. The first two arguments to qsubst are always the string to replace and the string to replace it with. The options are as follows: -w The search string is considered as a C symbol; it must be bounded by non-symbol characters. This option toggles. ('w' for 'word'.) -! -go -noask Enter ! mode automatically at the beginning of each file. -nogo -ask Negate -go, that is, ask as usual. -cN (Where N is a number.) Give N lines of context above and below the line with the match when prompting the user. -CAN (Where N is a number.) Give N lines of context above the line with the match when prompting the user. -CBN (Where N is a number.) Give N lines of context below the line with the match when prompting the user. -f filename The filename argument is one of the files qsubst should perform substitutions in. -F filename qsubst reads filename to get the names of files to perform substitutions in. The names should appear one to a line. The default amount of context is -c2, that is, two lines above and two lines below the line with the match. Arguments not beginning with a - sign in the options field are implicitly preceded by -f. Thus, -f is really needed only when the file name begins with a - sign. qsubst reads its options in order and processes files as it gets them. This means, for example, that a -go will affect only files named after the -go. The most context you can get is ten lines each, above and below. str1 is limited to 512 characters; there is no limit on the size of str2. Neither one may contain a NUL. NULs in the file may cause qsubst to make various mistakes. If any other program modifies the file while qsubst is running, all bets are off. AUTHORS
der Mouse <mouse@rodents.montreal.qc.ca> BSD
September 4, 1999 BSD
Check Out this Related Man Page
PG(1) User Commands PG(1) NAME
pg - browse pagewise through text files SYNOPSIS
pg [-number] [-p string] [-cefnrs] [+line] [+/pattern/] [file...] DESCRIPTION
pg displays a text file on a CRT one screenful at once. After each page, a prompt is displayed. The user may then either press the new- line key to view the next page or one of the keys described below. If no filename is given on the command line, pg reads from standard input. If standard output is not a terminal, pg acts like cat(1) but precedes each file with its name if there is more than one. If input comes from a pipe, pg stores the data in a buffer file while reading to make navigation possible. OPTIONS
pg accepts the following options: -number The number of lines per page. Usually, this is the number of CRT lines minus one. -c Clear the screen before a page is displayed, if the terminfo entry for the terminal provides this capability. -e Do not pause and display (EOF) at the end of a file. -f Do not split long lines. -n Without this option, commands must be terminated by a newline character. With this option, pg advances once a command letter is entered. -p string Instead of the normal prompt :, string is displayed. If string contains %d, its first occurrence is replaced by the number of the current page. -r Disallow the shell escape. -s Print messages in standout mode, if the terminfo entry for the terminal provides this capability. +number Start at the given line. +/pattern/ Start at the line containing the Basic Regular Expression pattern given. USAGE
The following commands may be entered at the prompt. Commands preceded by i in this document accept a number as argument, positive or neg- ative. If this argument starts with + or -, it is interpreted relative to the current position in the input file, otherwise relative to the beginning. i<newline> Display the next or the indicated page. id or ^D Display the next halfpage. If i is given, it is always interpreted relative to the current position. il Display the next or the indicated line. if Skip a page forward. i must be a positive number and is always interpreted relative to the current position. iw or iz Behave as <newline> except that i becomes the new page size. . or ^L Redraw the screen. $ Advance to the last line of the input file. i/pattern/ Search forward until the first or the i-th occurrence of the Basic Regular Expression pattern is found. The search starts after the current page and stops at the end of the file. No wrap-around is performed. i must be a positive number. i?pattern? or i^pattern^ Search backward until the first or the i-th occurrence of the Basic Regular Expression pattern is found. The search starts before the current page and stops at the beginning of the file. No wrap-around is performed. i must be a positive number. The search commands accept an added letter. If t is given, the line containing the pattern is displayed at the top of the screen, which is the default. m selects the middle and b the bottom of the screen. The selected position is used in following searches, too. in Advance to the next file or i files forward. ip Reread the previous file or i files backward. s filename Save the current file to the given filename. h Display a command summary. !command Execute command using the shell. q or Q Quit. If the user presses the interrupt or quit key while pg reads from the input file or writes on the terminal, pg will immediately display the prompt. In all other situations these keys will terminate pg. ENVIRONMENT VARIABLES
The following environment variables affect the behaviour of pg: COLUMNS Overrides the system-supplied number of columns if set. LANG, LC_ALL, LC_COLLATE, LC_CTYPE, LC_MESSAGES See locale(7). LINES Overrides the system-supplied number of lines if set. SHELL Used by the ! command. TERM Determines the terminal type. SEE ALSO
cat(1), more(1), sh(1), terminfo(5), locale(7), regex(7), term(7) NOTES
pg expects the terminal tabulators to be set every eight positions. Files that include NUL characters cannot be displayed by pg. AVAILABILITY
The pg command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/. util-linux April 2001 PG(1)