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Top Forums Shell Programming and Scripting sed - remove spaces before 1rst occurence of string Post 302277233 by cfajohnson on Thursday 15th of January 2009 06:10:04 PM
Old 01-15-2009
Quote:
Originally Posted by danmauer
seems easy but havent found in other posts...

i want to delete any spaces if found before first occurence of ${AI_RUN}


sed 's/ *\\$\\{AI_RUN\\}/\\$\\{AI_RUN\\}/' $HOME/temp1.dat

i think i'm close but can't put my finger on it. Smilie

Assuming you mean a literal ${AI_RUN}, and not the value of the variable:

Code:
sed 's/ *${AI_RUN}/${AI_RUN}/' "$HOME/temp1.dat"

 

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STRSUB(3pub)						       C Programmer's Manual						      STRSUB(3pub)

NAME
strsub - substitute first occurence of pattern with another string SYNOPSIS
#include <publib.h> char *strsub(char *str, const char *pat, const char *sub); DESCRIPTION
strsub finds the first occurence of the pattern pat in the string str (using a method similar to strstr(3), i.e., no regular expressions), and replaces it with sub. If pat does not occur in str, no substitution is made. Of course, if sub is an empty string, the pattern is deleted from the string. RETURN VALUE
strsub returns a pointer to the first character after the substitution, or NULL if no substitution was made. EXAMPLE
To substitute up to two occurences of "foo" with "bar" in a line, one might do the following. p = strsub(line, "foo", "bar"); if (p != NULL) strsub(line, "foo", "bar"); SEE ALSO
publib(3), strstr(3), strgsub(3) AUTHOR
Lars Wirzenius (lars.wirzenius@helsinki.fi) Publib C Programmer's Manual STRSUB(3pub)
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